Siemens | NCM S7 | User manual | Siemens NCM S7 User manual

Preface, Contents
Communication via Ethernet CPs
in S7 Stations
1
Installing and Starting the
Ethernet CP with STEP 7
2
SIMATIC NET
NCM for Industrial Ethernet
SEND/RECEIVE
interface
3
Manual
Configuring Communication
Connections
4
Programmed Communication
Connections
5
Programming FCs (Functions)
and FBs for S7 Ethernet CPs
6
NCM S7 Diagnostics
7
Firmware loader
8
for NCM S7 V5.2 and higher
Appendix
References
A
Glossary
B
Linking to Other Systems with
FETCH/WRITE
C
Document History
D
Index
Release 6/2003
C79000–G8976–C129–07
Classification of Safety-Related Notices
This manual contains notices which you should observe to ensure your own personal safety, as well as to protect the product and connected equipment. These notices are highlighted in the manual by a warning triangle and are marked as follows
according to the level of danger:
!
!
!
Danger
indicates that death or severe personal injury will result if proper precautions are
not taken.
Warning
indicates that death or severe personal injury can result if proper precautions are
not taken.
Caution
with warning triangle indicates that minor personal injury can result if proper precautions are not taken.
Caution
without warning triangle indicates that damage to property can result if proper precautions are not taken.
Notice
indicates that an undesirable result or status can occur if the relevant notice is
ignored.
Note
highlights important information on the product, using the product, or part of the
documentation that is of particular importance and that will be of benefit to the
user.
2
SIMATIC NET NCM S7 for Industrial Ethernet
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Trademarks
SIMATICR, SIMATIC HMIR and SIMATIC NETR are registered trademarks of
SIEMENS AG.
Third parties using for their own purposes any other names in this document which
refer to trademarks might infringe upon the rights of the trademark owners.
Safety Instructions Regarding your Product:
Before you use the product described here, read the safety instructions below
thoroughly.
Qualified Personnel
Only qualified personnel should be allowed to install and work on this equipment.
Qualified persons are defined as persons who are authorized to commission, to
ground, and to tag circuits, equipment, and systems in accordance with
established safety practices and standards.
Correct Usage of Hardware Products
Note the following
!
Warning
This device and its components may only be used for the applications described in
the catalog or the technical description, and only in connection with devices or
components from other manufacturers which have been approved or recommended by Siemens.
This product can only function correctly and safely if it is transported, stored, set
up, and installed correctly, and operated and maintained as recommended.
Before you use the supplied sample programs or programs you have written yourself, make certain that no injury to persons nor damage to equipment can result in
your plant or process.
EU Directive: Do not start up until you have established that the machine on which
you intend to run this component complies with the directive 89/392/EEC.
Correct Usage of Software Products
Note the following
!
Warning
This software may only be used for the applications described in the catalog or the
technical description, and only in connection with software products, devices, or
components from other manufacturers which have been approved or recommended by Siemens.
Before you use the supplied sample programs or programs you have written yourself, make certain that no injury to persons nor damage to equipment can result in
your plant or process.
SIMATIC NET NCM S7 for Industrial Ethernet
Release 6/2003
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3
Prior to Startup
Before putting the product into operation, note the following warning:
Caution
Prior to startup you must observe the instructions in the relevant documentation.
For ordering data of the documentation please refer to the catalogs or contact your
local SIEMENS representative.
Copyright E Siemens AG 2001–2003 All rights reserved
Disclaimer of Liability
The reproduction, transmission or use of this document or its contents is not
permitted without express written authority. Offenders will be liable for
damages. All rights, including rights created by patent grant or registration of
a utility model or design, are reserved.
We have checked the contents of this manual for agreement with the hardware and software described. Since deviations cannot be precluded entirely, we
cannot guarantee full agreement. However, the data in this manual are reviewed regularly and any necessary corrections included in subsequent editions. Suggestions for improvement are welcomed.
Siemens AG
Automation and Drives
Industrial Communication
Postfach 4848, D-90327 Nürnberg
4
Siemens Aktiengesellschaft
SIMATIC NET NCM S7 for Industrial Ethernet
Release 6/2003
C79000–G8976–C129–07
G79000-G8976-C129-07
Subject to technical change.
This Manual on SIMATIC NET NCM S7 for
Industrial Ethernet
...supports you when using the communication services provided by the SIMATIC
NET communications processors (Industrial Ethernet CPs) for communication on
SIMATIC NET with Industrial Ethernet in the management and cell areas.
The documentation on your S7 CPs and NCM S7 is in several parts that fit
together as shown below:
S S7-CP
– selecting
– installing
– commissioning
Manual
– performance data
S7-CP
for
S7-300 /
S7-400
S S7-CP and STEP 7 / NCM S7
– familiarization
– testing interfaces
– commissioning
Primer
STEP 7
NCM S7
S Communication services
with STEP 7 / NCM S7
– programming
– configuring
– downloading /
commissioning
– diagnostics
SIMATIC NET NCM S7 for Industrial Ethernet
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NCM S7
Manual
5
This Manual on SIMATIC NET NCM S7 for Industrial Ethernet
Audience
This manual is intended for personnel responsible for installing and programming
STEP 7 programs and for service personnel.
Scope of this Manual
This manual applies to version 5.2 and higher of the NCM S7 configuration
software for Industrial Ethernet and to version 5.2 and higher of the STEP 7
software.
This manual also includes specially marked passages that apply specifically to and
require version 5.2 SP1 of the NCM S7 for Industrial Ethernet configuration
software and version 5.2 SP1 of the STEP 7 software.
These include new functions for IP configuration:
S
IP access protection
Using IP access protection gives you the opportunity of restricting access to the
local S7 station to partners with specific IP addresses.
S
Configuring connections from the user program
In some situations, it is an advantage to set up communication connections not
over the configuration interface of STEP 7 but program-controlled by specific
applications.
As of STEP 7 V5.2 SP1, a function block is available for these applications that
allows flexible transfer of data blocks with configuration data to an Ethernet CP.
The description of the configuration for FETCH / WRITE services has been
extended.
Notice
Please note that the availability of new functions depends on the type of CP you
are using. You can check which functions your module supports in the description
in the Properties dialog in STEP 7 and in the catalog in HW Config.
The manual contains more detailed information /1/.
6
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This Manual on SIMATIC NET NCM S7 for Industrial Ethernet
Symbols Used in this Manual
Unless indicated otherwise, the functions described in this manual assume the use
of STEP 7. This symbol is used to indicate functions that require a specific version
of STEP 7 or higher, for example Version V5.2.
This symbol appears in the margin to draw your attention to useful tips.
This symbol indicates recommended documentation.
Where you see this symbol, you should also refer to additional information in the
basic help system of STEP 7.
F1
This symbol indicates where detailed context-sensitive help is available. You can
display these help texts with the F1 key or by clicking on the “Help” button in the
relevant dialog.
Conventions
References to other manuals and documentation are indicated by numbers in
slashes /.../. These numbers refer to the titles of manuals listed in the References
section of the Appendix.
SIMATIC NET NCM S7 for Industrial Ethernet
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This Manual on SIMATIC NET NCM S7 for Industrial Ethernet
You will find additional information in the following sources:
This manual is also part of the NCM S7 for Industrial Ethernet documentation
package. These documents are also on the Manual Collection CD supplied with
every S7 CP and they are also available on the Internet. The following table
provides you with an overview.
Title
Content
S7-CPs for Industrial
Ethernet
The manual S7 CPs for Industrial Ethernet contains information on the
characteristics of the CPs and instructions on installation and connections.
Manual
This is available on the Internet at:
S
S
S
S
S
S
General Section: http://www4.ad.siemens.de/view/cs/de/8777865
CP 343-1:
http://www4.ad.siemens.de/view/cs/de/8777308
CP 343-1 PN:
http://www4.ad.siemens.de/view/cs/de/8776538
CP 343-1 IT:
http://www4.ad.siemens.de/view/cs/de/8776544
CP 443-1:
http://www4.ad.siemens.de/view/cs/de/8776219
CP 443-1 IT:
http://www4.ad.siemens.de/view/cs/de/8776322
NCM S7 for Industrial
Ethernet
Primer
Based on simple examples, the primer introduces you to the methods of
connecting and networking SIMATIC S7 stations with CPs on Industrial
Ethernet. It shows you how the communications calls are entered in the user
program to allow you to use the services via the SEND/RECEIVE interface.
You will learn how simple it is to create a configuration for standard
applications using STEP 7 and the NCM S7 optional package.
The examples described here can also be found in the project folder for
sample programs after you have installed STEP 7 and the NCM S7 for
Industrial Ethernet option!
This is available on the Internet at:
http://www4.ad.siemens.de/view/cs/de/1172503
NCM S7 for Industrial
Ethernet
The manual is intended as a guide and reference work for configuring and
programming an Industrial Ethernet CP.
Manual
This is available on the Internet at:
http://www4.ad.siemens.de/view/cs/de/1172423
IT-CP
Manual
The manual is intended as a guide and source of reference when working with
the IT-CP. In addition to the functions provided by an Ethernet CP, the IT-CP
also provides functions for Internet technology.
This is available on the Internet at:
http://www4.ad.siemens.de/view/cs/de/1172744
Advanced PC
Configuration
Advanced PC Configuration is the new tool with which you can commission a
PC station as part of an industrial communication network.
Commissioning PC
Stations
The manual supports you and helps you to make efficient use of
communications with your PC applications in conjunction with the SIMATIC
NET modules. It explains the steps involved in configuration with NCM S7.
Manual
This is available on the Internet at:
http://www4.ad.siemens.de/view/cs/13542666
8
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This Manual on SIMATIC NET NCM S7 for Industrial Ethernet
Quick Start CD: Samples covering all aspects of communication
The Quick Start CD that can be ordered separately is a
treasure-trove of sample programs and configurations.
You can order this directly over the Internet at:
http://www4.ad.siemens.de/view/cs/de/574211
Additional Information on SIMATIC S7 and STEP 7
The following documentation contains additional information about the STEP 7
standard software of the SIMATIC programmable controllers and can be obtained
from your local Siemens office.
Topic
Basic information for technical
personnel using the STEP 7
standard software for control
tasks with S7-300/400
programmable controllers.
The reference works describing
the programming languages
LAD/FBD and STL as well as the
standard and system functions in
addition to the STEP 7 basic
knowledge.
Document
STEP 7 basics with
S
S
S
S
Configuring hardware with STEP 7
Programming with STEP 7
Manual for converting from S5 to S7
Primer for a fast start
STEP 7 reference manuals with
S Manuals for LAD/FBD/STL
S Standard and system functions for S7-300/400
You will also find information on SIMATIC programmable controllers on the Quick
Start CD and from the Customer Support Online services at:
http://www.siemens.de/simatic-net General information
or
http://www.ad.siemens.de/csi/net Product information and downloads
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This Manual on SIMATIC NET NCM S7 for Industrial Ethernet
Access to Online Help of STEP 7 and NCM S7
With the online help, you can obtain the following information:
S
You can display the contents of the STEP 7 basic help system with the menu
command Help –> Contents.
S
Context-sensitive help on the selected object using the Help –> Context-Sensitive
Help menu command, the F1 function key or the question mark in the toolbar.
F1
You can then access further information relating to the current topic.
S
Glossary for all STEP 7 applications by clicking the “Glossary” button.
Please note that each STEP 7 application has its own contents and
context-sensitive help.
-
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Contents
1
Communication via Ethernet CPs in S7 Stations . . . . . . . . . . . . . . . . . . . . . . . . . .
15
1.1
Industrial Ethernet . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
16
1.2
SIMATIC S7 Communication with S7 Ethernet CPs . . . . . . . . . . . . . . . . . .
17
1.3
1.3.1
1.3.2
PG/OP Communication via Industrial Ethernet . . . . . . . . . . . . . . . . . . . . . .
PG Communication with STEP 7 over Industrial Ethernet . . . . . . . . . . . . .
OP Operation: Connecting Operator Interface Devices via
Industrial Ethernet . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
21
23
1.4
S7 Communication on Industrial Ethernet . . . . . . . . . . . . . . . . . . . . . . . . . . .
25
1.5
S5-compatible Communication (SEND/RECEIVE Interface) ) . . . . . . . . . .
29
1.6
FETCH/WRITE Services (Server) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
32
1.7
1.7.1
1.7.2
Networking Stations with STEP 7 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Network/Project Variant: One Subnet – One Project . . . . . . . . . . . . . . . . . .
Network/Project Variant: SIMATIC S5 and Non-SIMATIC
Devices on the Subnet . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Network/Project Variant: Two or More Subnets – One Project . . . . . . . . .
Network/Project Variant: One Subnet – More Than One (Sub)Project . . .
Network/Project Variant: Several Subnets in Several (Sub) Projects . . . .
Network/Project Variant: Connections between Subnets (TCP/IP) . . . . . .
33
35
36
37
38
41
43
Installing and Starting the Ethernet CP with STEP 7 . . . . . . . . . . . . . . . . . . . . . . .
45
2.1
General Information About the NCM S7 for Industrial Ethernet Option . .
46
2.2
2.2.1
2.2.2
2.2.3
2.2.4
2.2.5
2.2.6
Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Creating an Industrial Ethernet Subnet . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Entering an Ethernet CP in the Hardware Configuration . . . . . . . . . . . . . .
Displaying the Network Attachments of a Station . . . . . . . . . . . . . . . . . . . .
Setting Further CP Properties . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
“Substitute Objects” in the STEP 7 Project . . . . . . . . . . . . . . . . . . . . . . . . . .
Configuring Communication Services . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
47
48
51
55
57
65
68
2.3
2.3.1
2.3.2
Assigning Addresses for the First Time (Applies to Latest CPs) . . . . . . . .
Addressing by Selecting the Target System in the SIMATIC Manager . . .
Addressing using the Properties Dialog in HW Config or NetPro . . . . . . .
69
70
73
2.4
Downloading the Configuration Data to the Target System . . . . . . . . . . . .
74
SEND/RECEIVE Interface in the User Program . . . . . . . . . . . . . . . . . . . . . . . . . . . .
77
3.1
How the SEND/RECEIVE Interface Works on the CPU . . . . . . . . . . . . . . .
78
3.2
Programming the SEND/RECEIVE Interface . . . . . . . . . . . . . . . . . . . . . . . .
79
3.3
Data Exchange S7 CPU <–> Ethernet CP . . . . . . . . . . . . . . . . . . . . . . . . . .
82
3.4
3.4.1
3.4.2
Additional Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Programming Data Transfer on TCP Connections . . . . . . . . . . . . . . . . . . .
Recommendations for Use with a High Communications Load . . . . . . . . .
84
84
85
1.7.3
1.7.4
1.7.5
1.7.6
2
3
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11
Contents
4
5
12
Configuring Communication Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
87
4.1
Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
88
4.2
Possible Connection Configurations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
89
4.3
4.3.1
4.3.2
4.3.3
4.3.4
Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
New Connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Connections to Partners in Other Projects . . . . . . . . . . . . . . . . . . . . . . . . . .
Further Functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Connections Without Assignment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
91
94
96
99
100
4.4
4.4.1
4.4.2
4.4.3
4.4.4
Configuring ISO Transport Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Specifying the Local Connection Endpoint . . . . . . . . . . . . . . . . . . . . . . . . . .
Specifying ISO Transport Addresses . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Specifying ISO Transport Dynamic Properties . . . . . . . . . . . . . . . . . . . . . . .
Checking ISO Transport Connection Properties . . . . . . . . . . . . . . . . . . . . .
103
104
106
109
111
4.5
4.5.1
4.5.2
4.5.3
Configuring ISO-on-TCP Connections Properties . . . . . . . . . . . . . . . . . . . .
Specifying the Local Connection Endpoint . . . . . . . . . . . . . . . . . . . . . . . . . .
Specifying ISO-on-TCP Addresses . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Checking ISO-on-TCP Connection Properties . . . . . . . . . . . . . . . . . . . . . . .
112
113
115
118
4.6
4.6.1
4.6.2
4.6.3
Configuring TCP Connection Properties . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Specifying the Local Connection Endpoint . . . . . . . . . . . . . . . . . . . . . . . . . .
Specifying TCP Addresses . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Checking TCP Connection Properties . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
119
120
123
126
4.7
4.7.1
4.7.2
4.7.3
4.7.4
4.7.5
Configuring UDP Connection Properties . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Specifying the Local Connection Endpoint . . . . . . . . . . . . . . . . . . . . . . . . . .
Specifying UDP Addresses . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
UDP with Broadcast and Multicast . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Checking the Properties of a UDP Connection . . . . . . . . . . . . . . . . . . . . . . .
Free UDP Connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
127
128
130
133
137
138
4.8
FETCH/WRITE Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
139
4.9
Routing to Distribute Load . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
143
Programmed Communication Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
145
5.1
Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
146
5.2
Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
148
5.3
Configuration Data Block . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
149
5.4
Parameter Field for System Data
(CP Networking) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
150
5.5
5.5.1
5.5.2
5.5.3
5.5.4
5.5.5
Parameter Fields for Connection Types . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Parameter Field for TCP Connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Parameter Field for a UDP Connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Parameter Field for an ISO-on-TCP Connection . . . . . . . . . . . . . . . . . . . . .
Parameter Field for an E-Mail Connection . . . . . . . . . . . . . . . . . . . . . . . . . .
Parameter field for FTP connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
152
153
154
155
156
158
5.6
Subfield types . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
159
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6
7
8
Programming FCs (Functions) and FBs for S7 Ethernet CPs . . . . . . . . . . . . . . .
163
6.1
General Notes on FCs / FBs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
164
6.2
6.2.1
6.2.2
6.2.3
Setting Parameters for FC Calls . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Parameters for CP and Connection Assignment (input parameters) . . . .
Parameters for Specifying a CPU Data Area (input parameters) . . . . . . .
Status Information (output parameters) . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
167
167
169
169
6.3
6.3.1
6.3.2
FCs for the SEND/RECEIVE Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
FC5 AG_SEND / FC50 AG_LSEND . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
FC6 AG_RECV / FC60 AG_LRECV . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
170
174
184
6.4
6.4.1
6.4.2
FCs for Access Coordination with FETCH/WRITE . . . . . . . . . . . . . . . . . . .
FC7 AG_LOCK . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
FC8 AG_UNLOCK . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
191
193
195
6.5
FB55 IP_CONFIG for Programmed Communication Connections . . . . . .
197
6.6
Numeric Data / Resource Requirements of the FCs . . . . . . . . . . . . . . . . . .
203
NCM S7 Diagnostics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
205
7.1
Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
206
7.2
7.2.1
7.2.2
Functions of NCM S7 Diagnostics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Installing and Starting NCM S7 Diagnostics . . . . . . . . . . . . . . . . . . . . . . . . .
General Menu Commands . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
207
208
210
7.3
7.3.1
7.3.2
7.3.3
7.3.4
7.3.5
7.3.6
Starting Diagnostics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Establishing a Connection to the Ethernet CP . . . . . . . . . . . . . . . . . . . . . . .
Starting Diagnostics from the CP Properties Dialog . . . . . . . . . . . . . . . . . .
Starting Diagnostics from the Windows Start Menu . . . . . . . . . . . . . . . . . .
Using a Gateway . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Using the PC Station – Setting a Gateway with “PC internal” . . . . . . . . . .
Other Ways of Starting Diagnostics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
212
212
212
213
215
217
218
7.4
How to Use Diagnostics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
219
7.5
Starting Diagnostic Functions Explicitly . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
220
7.6
7.6.1
7.6.2
Checklist for “Typical Problems” in a System . . . . . . . . . . . . . . . . . . . . . . . .
Checklist for General CP Functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Communication Connections Checklist . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
222
223
224
Firmware Loader . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
225
8.1
Application . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
226
8.2
Loading Firmware . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
227
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Contents
A
References . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
229
B
Glossary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
233
B.1
General Section . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
234
B.2
Industrial Ethernet . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
238
B.3
PROFInet . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
240
C
Linking to Other Systems with FETCH/WRITE . . . . . . . . . . . . . . . . . . . . . . . . . . . .
243
D
Document History . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
249
Index . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
251
14
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Communication via Ethernet CPs in S7
Stations
1
The Ethernet CP for SIMATIC S7 provides a series of communications services for
different tasks.
This chapter explains the following:
S
The types of communication possible with the Ethernet CP on Industrial
Ethernet
S
The tasks handled by the Ethernet CP for the various services
S
How to create the conditions for your communications requirements
You will find further information in the following sources:
S
When installing the Ethernet CP, please refer to the instructions in the manual
/1/ supplied with the Ethernet CP. This also contains further information about
the performance of the Ethernet CP .
S
For the functions and use of the STEP 7 configuration software, some of which
is used to configure the CP (such as hardware configuration), please refer to /6/
and /8/.
S
For using, structuring and handling Industrial Ethernet, you will find detailed
information in /11/.
S
For a general introduction to local area networks with TCP/IP refer to /16/ and
/17/.
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Communication via Ethernet CPs in S7 Stations
1.1
Industrial Ethernet
Definition
Within the open, heterogeneous SIMATIC NET communication system, Industrial
Ethernet is the network for the management and cell level. Physically, Industrial
Ethernet is an electrical network that uses a shielded coaxial cable or twisted pair,
or an optical network with fiber-optic cables.
Industrial Ethernet is defined by the international standard IEEE 802.3 (see /11/).
All-Round Communication in the Industrial Sector
Industrial Ethernet is integrated in the SIMATIC NET concept that allows
comprehensive networking of the management, cell and field levels in conjunction
with PROFIBUS and the AS-interface (AS-i).
Industrial
Ethernet
(IEEE 802.3)
PROFIBUS
(EN 50170 Vol. 2 PROFIBUS)
AS-Interface
(AS-i, Actuator-Sensor Interface)
Figure 1-1
Industrial Ethernet in the SIMATIC NET Concept
Network Access
Industrial Ethernet is accessed using the CSMA/CD (Carrier Sense Multiple
Access with Collision Detection) network access technique specified in
IEEE 802.3.
16
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Communication via Ethernet CPs in S7 Stations
1.2
SIMATIC S7 Communication with S7 Ethernet CPs
Types of Communication
The Ethernet CP for SIMATIC S7 supports the following types of communication
depending on the CP type:
Ethernet CP
Ethernet CP
S7/M7-400
S7-300
Interfaces / Services /
Protocols
Possible types of communication
S PG/OP communication
S S7 communication
S S5-compatible communication
with the protocols
–
ISO
–
TCP/IP (RFC 1006)
with the SEND / RECEIVE interface and the protocols
–
ISO Transport
–
ISO-on-TCP (TCP/IP with RFC 1006)
–
TCP
–
UDP
–
E-mail
with FETCH / WRITE services and the protocols
S PROFInet communication
–
ISO Transport
–
ISO-on-TCP
–
TCP
with the protocols
–
S HTML process control with
web browser
S File management and file
access with FTP
S
TCP
with the protocols
–
HTTP / IP protocol
with the protocols
–
FTP / IP protocol
PG/OP communication
PG/OP communication is used to download programs and configuration data,
to run tests and diagnostic functions, and to control and monitor a plant from
OPs.
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Communication via Ethernet CPs in S7 Stations
S
S7 communication
S7 communication forms a simple and efficient interface between SIMATIC S7
stations and PGs/PCs using communication function blocks.
S
S5-compatible communication with SEND/RECEIVE interface
Depending on the CP type, the SEND/RECEIVE interface allows
program-controlled communication on a configured connection from a SIMATIC
S7 PLC to another SIMATIC S7 PLC, to a SIMATIC S5 PLC, to PCs/PGs, and
to any other station.
Depending on the CP type, the following communications services are available
on the SEND/RECEIVE interface:
– ISO Transport
optimized for top performance at the self-contained manufacturing level
– TCP/IP for internetwork communication with
ISO-on-TCP connections (RFC 1006), TCP connections and
UDP datagram service (including broadcast / multicast).
– Sending E-mail
The controller is capable of sending messages triggered by process events
(refer to the IT-CP manual for details /5/).
S
S5-compatible communication with FETCH/WRITE services (server)
The FETCH/WRITE services (server) allow direct access to the system
memory areas on the SIMATIC S7 CPU from SIMATIC S5, SIMATIC PC
stations, or from devices of other ranges.
Depending on the CP type, the following communications services are available
for FETCH/WRITE access:
– ISO Transport
optimized for top performance at the self-contained manufacturing level
– TCP/IP for internetwork communication with
ISO-on-TCP connections (RFC 1006), TCP connections.
S
PROFInet communication
PROFInet is a standard of the PROFIBUS Users organization defining a
heterogeneous communications and engineering model.
An S7-300 station equipped with a CP capable of PROFInet can be
interconnected as a PROFInet component in SIMATIC iMap.
TCP connections are used for the PROFInet communication.
For more detailed information on PROFInet, refer to /23/.
S
HTML process control
With an IT-CP, use the supplied functions and HTML pages to query important
system data using a Web browser (you should also refer to the instructions on
the IT-CP /5/).
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Communication via Ethernet CPs in S7 Stations
S
File management and file access with FTP
The IT-CP (S7-400 / S7-300) provides additional functions for FTP services.
You can use your S7 station both as an FTP client and as an FTP server (refer
to the manual of the IT-CP /5/).
– S7 Station as FTP Client
You can transfer data blocks from or to a file server.
– S7 Station as FTP Server
Another station, for example, a PC transfers data blocks to or from the S7
station the file system on the IT-CP.
Possibilities for Communication between Device Types
The possible communication available with the types of communication listed
above is shown in the following table:
PC station
S7-400
S7-300
S7-300
S5-115 to -155U/H
S7 communication
S7 communication
SEND/RECEIVE
SEND/RECEIVE
SEND/RECEIVE
FETCH/WRITE
PROFInet
PG/OP
communication1)
S7 communication1)
SEND/RECEIVE
FETCH/WRITE
HTML process
control
PROFInet
FTP services
S7/M7-400
S7 communication
S7 communication
SEND/RECEIVE
SEND/RECEIVE
SEND/RECEIVE
FETCH/WRITE
PG/OP
communication1)
S7 communication1)
FTP services
SEND/RECEIVE
FETCH/WRITE
HTML process
control
FTP services
1) PC only as client
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Communication via Ethernet CPs in S7 Stations
Configuration and Diagnostics
To connect and configure the Ethernet CP, you require the STEP 7 configuration
software and the SIMATIC NET NCM S7 for Industrial Ethernet option.
NCM S7 for Industrial Ethernet is installed as a STEP 7 option and is therefore
integrated in STEP 7.
NCM S7 for Industrial Ethernet also provides a wide range of diagnostic functions
for the various types of communication.
When configuring PROFInet communication, you also use the engineering tool
SIMATIC iMap; for detailed information on SIMATIC iMap, refer to the manual
Component based Automation – Configuring Plants with SIMATIC iMap /23/.
Programmed Connections
V 5.2.1
In some situations, it is an advantage to set up communication connections not
over the configuration interface of STEP 7 but program-controlled by specific
applications.
As of STEP 7 V5.2 SP1, a function block is available for these applications that
allows flexible transfer of data blocks with configuration data to an Ethernet CP.
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Communication via Ethernet CPs in S7 Stations
1.3
PG/OP Communication via Industrial Ethernet
Application
PG/OP communication provides functions that are already integrated in every
SIMATIC S7/M7/C7 device.
A distinction must be made between the following two types of function:
S
PG communication
PG communication with STEP 7 PLCs on Industrial Ethernet means the
following:
– You can use the complete range of functions of STEP 7 on Industrial
Ethernet.
– You can use programming, diagnostic, operating and monitoring functions on
all modules in the SIMATIC S7 PLC via Industrial Ethernet.
S
OP Operation
PG/OP communication on Industrial Ethernet allows the operation and
monitoring of all modules in a SIMATIC S7 PLC using operator interface
systems (TD/OP).
The Ethernet CP acts as a “communications relay” that relays the PG/OP
communication via Industrial Ethernet.
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Communication via Ethernet CPs in S7 Stations
Operator
interface
functions
PC with Ethernet CP
OP
Ethernet attachment
STEP 7
NCM S7
Modem /
ISDN
Create configuration data for
every CP and download to the
Ethernet CPs
Ethernet
S7 – 400
S7 – 300
Ethernet CP
WAN *
* only TCP/IP
S7 – 400
Ethernet CP
Ethernet CP
Figure 1-2
22
Configuration for PG/OP Operation
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Communication via Ethernet CPs in S7 Stations
1.3.1
PG Communication with STEP 7 over Industrial Ethernet
Requirements for PG Communication
PG communication is possible when the following requirements are met:
S
An Ethernet CP is installed in the PG or engineering station or there is a
modem/ISDN interface for remote access.
S
The Ethernet CP must have an address (default MAC address or set the IP
address).
Networking the PG / Engineering Station
Depending on the configuration of the PG or Engineering Station, the following two
situations are possible when using PG communication:
S
PG / Engineering Station in the Configured Mode
If you select this configuration when you commission the PG / engineering
station, the interfaces of the communication modules you are using are already
known. The option in “Set PG/PC Interface” is automatically set to
“PC-internal”.
Once you have downloaded this configuration to your PG / engineering station,
you can exchange PG functions with the accessible nodes in the network with
STEP 7 without requiring any further settings.
S
PG / Engineering Station in PG Operation
If your PG or engineering station is configured for this mode, you must specify the
interface on the PG or engineering station explicitly with “Set PG/PC Interface”.
Follow the steps outlined below:
1. Open the “Set PG/PC Interface” dialog box in the Windows Control Panel.
2. Set the PG/PC interface according to the CPs available on your PG and
according to the bus attachment (interface parameter assignment used).
For more detailed information on the topic of PG operation and engineering station,
refer to /4/.
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Communication via Ethernet CPs in S7 Stations
1.3.2
OP Operation: Connecting Operator Interface Devices via
Industrial Ethernet
Requirements
Operation allowing operator interface functions is possible when the following
conditions are met:
S
The operator interface device has:
– an Ethernet CP installed
– SOFTNET S7 for Ind. Ethernet or S7-1613/ WIN 95, WIN NT, MS-DOS,
Windows installed.
S
The CPs in the S7 stations are supplied with a MAC/IP address (use the default
MAC address or set an IP address).
Procedure
To be able to use S7 communication, address the required module in the SIMATIC
S7 PLC on your operator interface system.
For more detailed information, refer to the description of your operator interface
system.
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Communication via Ethernet CPs in S7 Stations
1.4
S7 Communication on Industrial Ethernet
Application
S7 communication via Industrial Ethernet allows program-controlled
communication using communication SFBs/FBs via configured S7 connections.
Per job, up to 64 Kbytes of user data can be transmitted.
The Ethernet CP acts as an “S7 communication relay” by passing on the S7
functions via Industrial Ethernet (see /8/). Depending on the configuration of the
Ethernet CP, data transfer is on the basis of the ISO transport or the ISO-on-TCP
protocol (TCP/IP with RFC 1006).
From the perspective of the user, S7 communication is identical over PROFIBUS
and Industrial Ethernet.
Nodes
Two situations can occur depending on device type and plant configuration:
S
Client and server functionality at both ends
S7 connections can be operated between the following nodes with the entire
functionality of S7 communication:
– between S7 stations S7-300 and S7-400;
– between S7 stations and PC/PG stations with an Ethernet CP.
S7 – 400
Ethernet CP
S7 – 300
Ethernet CP
M7
Ethernet
WAN *
PUT / GET
BSEND / BRECV
USEND / URECV
* only TCP/IP
PC/PG with Ethernet CP
S7 – 300 / 400
Figure 1-3
Nodes Communicating on S7 Connections over Industrial Ethernet
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Communication via Ethernet CPs in S7 Stations
S
Client and server functionality at one end only (S7 connections
configured at one end)
In the following situations, write and read functions can be implemented with
PUT / GET:
– S7 communication over router
PG/PC stations can access S7 stations if the PG/PC stations are connected
to a different subnet or subnet type (PROFIBUS / Ethernet) via routers (for
example, an IE/PB Link); in this case, S7 stations are servers.
S7 communication is possible over a gateway.
Ethernet CP
S7 – 300
Ethernet CP
S7 – 400
PUT / GET
Ethernet
PC/PG Station
Ethernet
IE/PB Link
PC/PG Station
PROFIBUS
PUT / GET
Figure 1-4
PC/PG station communicates over a gateway with S7 stations on an underlying PROFIBUS
or Ethernet
For more detailed information on the features supported by your Ethernet CP, refer
to the manual /1/.
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Communication via Ethernet CPs in S7 Stations
Configuring S7 Connections
Create S7 connections to use S7 communication for data exchange between two
SIMATIC S7 stations.
For more detailed information, refer to the STEP 7 Description /6/ /8/.
Notice
S7 connections via routers are supported only within a STEP 7 project but not
between partners in different STEP 7 projects of a multiproject!
Interface in the User Program of the S7 Station
You use SFBs (for S7-400) and FBs (for S7-300) in the user program.
Block Type
Client
Server
x
–
SFB / FB12
BSEND
SFB / FB13
BRCV
SFB / FB15
PUT
x
– 1)
SFB / FB14
GET
x
– 1)
SFB / FB8
USEND
x
–
SFB / FB9
URCV
–
x
SFC / FC62
CONTROL (S7-400) /
C_CNTRL (S7-300)
x
x 2)
x
Described in
STEP 7
D
Documentation
t ti /9/
1) you do not need to configure a connection on the server
2) for S7-300
Notice
Please remember the following points regarding data consistency in your user program:
In the CPU of the S7 station, the read or written information is taken from the S7
user program into the operating system or copied from the operating system to the
S7 user program in blocks of 8 or 32 bytes (depending on the firmware version).
If information in the word or double-word format is located across such boundaries, data inconsistency may arise during transmission using S7 communication!
For more detailed information, refer to the STEP 7 documentation /9/.
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Communication via Ethernet CPs in S7 Stations
Notes on S7 Communication between PC/PG Station and S7 Station
Applications in a PC/PG station communicate with the S7 station over an OPC
interface or SAPI-S7 interface for operator intervention, monitoring and control.
The S7 stations use the integrated communication SFBs/FBs (client and server
functionality at both ends).
The following general requirements must be met by a PC/PG station for S7
communication:
S
On the PC/PG:
– an Ethernet CP installed
– there is an interface for S7 communication installed: SOFTNET S7 for Ind.
Ethernet or S7-1613/ WIN 95, WIN NT, MS-DOS, Windows.
S
The CPs in the S7 stations are supplied with a MAC/IP address (use the default
MAC address or set an IP address).
To use S7 communication with the SIMATIC S7 PLC from a PC, address the
required CPU module in the SIMATIC S7 PLC that you want to communicate
with in your PC application.
S7 Communication via Routers (one-sided Client and Server Functionality)
It is possible to reach the S7 station from an application (OPC server) of the
PC/PG station that is attached to another subnet. The subnets must be connected
over a router such as the IE/PB Link. An S7 station or a PC connected to both
subnets can also serve as a router.
In this configuration, the S7 station can only be addressed by the PC/PG station as
a communications server on S7 connections configured at one end.
The requirements for the configuration of the PC/PG station are identical to those
for operation in the same subnet (see above); the CP in the PC/PG station must
also have routing capability.
In this situation, configure a one-ended S7 connection to the PC/PG station in the
other subnet for the PC/PG station in STEP 7 NetPro. You can then access data in
the S7 station in your user program using the functions PUT (writing) and GET
(reading).
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1.5
S5-compatible Communication (SEND/RECEIVE
Interface) 1)
Application
Using the SEND/RECEIVE interface, your S7 user program has access to
S5-compatible communication with configured transport connections.
Data transmission on a configured transport connection is suitable for
S
the reliable transmission of related blocks of data between two Ethernet nodes
using
– TCP (see /17//19//20/) with ISO-on-TCP connection (see /18/) or TCP
connection;
– ISO transport connection
S
simple (unacknowldeged) transfer of related blocks of data (datagram service)
between two Ethernet nodes with UDP (User Datagram Protocol) on IP.
The SEND/RECEIVE interface is also suitable for sending E-mail (refer to the
manual for the IT-CP /5/).
For TCP applications, there is an active network with IP protocol (see /20/).
ISO Transport Connection
ISO transport provides services for the reliable transfer of data on configured
connections. Due to the segmentation of the data, large amounts of data can be
transmitted.
Transmission reliability is extremely high due to automatic repetition and additional
field check mechanisms. The communications partner confirms reception of data
and the sender receives a return value on the SEND/RECEIVE interface.
ISO transport is operated only on Industrial Ethernet and is optimized for
high-performance operation at the self-contained manufacturing level.
1
The previous name of the SEND/RECEIVE interface was S5S5 connections
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Communication via Ethernet CPs in S7 Stations
IP (Internet Protocol)
For internetwork data transmission, the following services are available with
suitable CPs such as the CP 443-1:
S
ISO-on-TCP connection
ISO-on-TCP is intended for reliable, internetwork data transmission.
The ISO-on-TCP service corresponds to the TCP/IP standard (Transmission
Control Protocol/Internet Protocol) with the RFC 1006 extension according to
layer 4 of the ISO reference model (see /18/).
RFC 1006 extends the TCP protocol by allowing the transmission of blocks of
data (“messages”) assuming that both partners support RFC 1006.
Transmission reliability is extremely high due to automatic repetition and
additional field check mechanisms. The communications partner confirms
reception of data and the sender receives a return value on the
SEND/RECEIVE interface.
S
TCP connection
When using the SEND/RECEIVE interface on TCP connections, the Ethernet
CP supports the socket interface (for example, Winsock.dll) to TCP/IP found on
almost every system (PC or other system).
TCP is intended for reliable internetwork data transmission.
The TCP service complies with the TCP/IP standard (Transmission Control
Protocol/Internet Protocol; see /18/).
S
UDP connection
UDP is intended for simple internetwork data transmission without confirmation.
If the connection is suitably configured, broadcast and multicast frames can
also be sent on UDP connections.
To avoid overload due to high broadcast load, the CP does not allow reception
of UDP broadcasts. As an alternative, use the multicast function over a UDP
connection. This allows you to register the CP as a node in a multicast group.
SEND/RECEIVE
Interface
Data transfer is triggered by the user program. The interface to the user program in
the SIMATIC S7 is formed by special SIMATIC S7 blocks of the type FC
(functions).
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Communication via Ethernet CPs in S7 Stations
Stations
The SEND/RECEIVE interface allows program-controlled communication on
Industrial Ethernet between the SIMATIC S7 PLC and the following:
S
SIMATIC S7 PLC with Ethernet CP
S
SIMATIC S5 PLC with Ethernet CP
S
PC/PG with Ethernet CP
S
Other station with Industrial Ethernet attachment
S7 – 400
Ethernet CP
S7 – 300
Ethernet CP
D D D
Ethernet
D D D
SIMATIC S5
with Ethernet CP
D D D
Other station with
Ethernet attachment
WAN
Internet
Router
Figure 1-5
D D D
PG/PC with Ethernet
attachment
only TCP/IP
SIMATIC S7 PLC with Possible Communications Partners on the SEND/RECEIVE Interface
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Communication via Ethernet CPs in S7 Stations
1.6
FETCH/WRITE Services (Server)
Application
In addition to the SEND/RECEIVE interface, the FETCH/WRITE functionality
provides further services for S5-compatible communication on configured transport
connections.
The FETCH/WRITE interface is used primarily to attach SIMATIC S7 to SIMATIC
S5 and to other non-S7 stations (for example PCs).
S
FETCH
The partner on the connection (SIMATIC S5 or non-S7 station) can read
system data on the SIMATIC S7 PLC.
S
WRITE
The partner on the connection (SIMATIC S5 or non-S7 station) can write
system data on the SIMATIC S7 PLC.
From the point of view of the SIMATIC S7 PLC, this is a passive communication
function; the communications partner initiates the connection establishment.
For further information, refer to the system documentation of the SIMATIC S5 PLC
or the non-S7 station you are using.
Connection Types
To access a station with FETCH or WRITE functions, a FETCH passive or WRITE
passive connection must be configured. The following types are possible:
S
ISO Transport
S
ISO-on-TCP
S
TCP
Coordinating Access Using the User Program
To coordinate access, you can use the FCs AG_LOCK and AG_UNLOCK.
With these FCs, you can coordinate access to system memory areas so that no
inconsistent data are created and transferred.
SIMATIC S5
On the SIMATIC S5 station, the FETCH/WRITE services are configured and
started by READ ACTIVE/PASSIVE and WRITE ACTIVE/PASSIVE.
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1.7
Networking Stations with STEP 7
Configuring
To allow stations to communicate with each other the networks must be configured
in the STEP 7 projects.
Configuring a network or subnet involves the following:
1. You create one or more subnets of the required subnet type in the project.
2. You select the properties of the subnet. Normally the default settings are
adequate.
3. You connect the station “logically” to the subnet.
4. You set up connections for communication.
Networking in a Multiproject
STEP 7 as of Version V5.2 supports configuration in a multiproject.
Using a multiproject, for example, you can create a project for distributed editing by
various editors and distribute the stations to the projects according to their editors.
To allow this, functions are available for branching and merging (sub) projects.
Interproject subnets and connections can be created.
Tools
The SIMATIC Manager provides convenient tools for configuring and documenting
networks (also graphically with NetPro).
The chapter describing network configuration in /6/ and the online help system also
contain information about configuring SIMATIC S7 networks.
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Variants
Before configuring networks with STEP 7, you should be aware of the various
configurations possible in the STEP 7 project. The following configurations are
typical for stations networked with CPs:
Characteristics/Configuration
Variant (examples)
1
1 subnet – 1 project
2
Additional SIMATIC S5 stations and stations with equipment of other vendors
3
2 or more subnets – 1 project
4
1 subnet – more than one project
5
More than one subnet – more than one project
6
Internetwork connections (TCP)
These variants will be used as a basis to illustrate how real configurations can be
created in STEP 7 projects.
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1.7.1
Network/Project Variant: One Subnet – One Project
Configuration of the System
In the simplest case, your system consists of SIMATIC S7 stations connected by
one subnet, for example of the type Industrial Ethernet.
S7-400/1
S7-300/1
System
“Production”
Ethernet (1)
S7-300/2
View in a STEP 7 Project
You create an Industrial Ethernet object in the STEP 7 project. Stations created
in the same project refer to this object as soon as they are configured as
network nodes.
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1.7.2
Network/Project Variant: SIMATIC S5 and Non-SIMATIC Devices
on the Subnet
Configuration of the System
In addition to SIMATIC S7 stations, SIMATIC S5 stations and non-SIMATIC
devices can be included in your system.
S7-400/1
System
“Production”
S7-300/1
Non-SIMATIC
Ethernet (1)
SIMATIC S5
S7-300/2
View in a STEP 7 Project
SIMATIC S5 stations you intend to include in the communication can be
selected directly. Non-SIMATIC devices must be entered in the configuration as
Other stations.
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1.7.3
Network/Project Variant: Two or More Subnets – One Project
Configuration of the System
Due to the different tasks of the stations or due to the extent of the system it may
be necessary to operate more than one network.
S7-400/1
System
“Production and Management Level”
Ethernet (1)
Ethernet CP
S7-400/2
PROFIBUS CP
PROFIBUS (1)
S7-300/1
S7-300/2
View in a STEP 7 Project
You can create the subnets in one STEP 7 project and configure the stations for
communication.
This representation illustrates the following:
S
More than one subnet can be managed in one project.
S
Each station is created once in the project.
S
Each station can be assigned to more than one subnet by assigning its CPs to
different subnets.
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1.7.4
Network/Project Variant: One Subnet – More Than One
(Sub)Project
Configuration of the System
In complex networked systems, during configuration it is sometimes more efficient
to manage plant sections in different (sub) projects.
The situation can arise that communication takes place over an interproject subnet
and that interproject connections must then also be created.
Example:
System section
“Production 2”
System section
“Production 1”
S7 – 400/2
S7 400/1
Ethernet (1)
S7 300/1
S7 – 300/2
S7 – 300/3
Organization in a Multiproject
User-friendly and consistent configuration of such communication is supported in
STEP 7 as of Version V5.2 with the multiproject.
The functions for multiprojects in STEP 7 allow the following:
S
Several projects can be managed in one multiproject and edited separately
S
Projects can be branched and merged
Two different strategies can be distinguished in a multiproject:
38
S
Several employees work at the same time on a multiproject in a networked
environment. The projects of the multiproject are in different network folders. In
this case, all connection partners are available for configuring connections.
S
One employee manages the multiproject centrally. This person creates the
structures for projects (when necessary locally) and contracts individual projects
out for external editing. The central configuration engineer then returns these
projects to the multiproject and synchronizes the interproject data with system
support and where necessary executes the required interproject functions.
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In this case, agreement is necessary, for example, regarding the assignment of
connection names because it will be far easier when synchronizing the projects
to bring connections with identical connection names together.
The topic of multiprojects is dealt with in detail in the STEP 7 basic help.
Here, you will find information on the following topics:
S
Requirements for interproject functions
S
How to create multiprojects
S
How to create a new project in a multiproject
S
How to separate a project from a multiproject
S
How to include projects in the multiproject
S
How to synchronize projects in a multiproject
S
Moving stations within a multiproject (when a station is moved from one project
of a multiproject to another project of the same multiproject (for example using
drag & drop), the interproject connections are retained)
S
Possible problems in distributed projects and tips on how to avoid them
Possibilities for stations outside the current project
The addition of the multiproject functionality means that the following situations can
arise:
S
Connection to a partner in an unknown project
The new multiproject functionality allows you to create a connection to a partner
in an unknown project. In this case, you can specify a connection name as a
reference in the properties dialog of the connection. When the projects are
merged, STEP 7 then supports you with automatic synchronization of the
separately configured connections.
The connection remains unspecified until the projects have been merged and
the connections synchronized. Only following this synchronization can the
configuration data be downloaded to the local station without inconsistencies.
You should therefore use this variant when you know that the projects will be
merged in a multiproject.
S
Specified connections with representative objects
To allow you to create specified connections to stations in a different project (for
example production 2) or that are not managed with STEP 7, you can configure
these stations as other stations(example in the project production 1).
This makes it possible to create consistent, fully specified configuration data
and to download it to the local station.
It is also possible to create specified connections between these stations in
different, independent projects. The stations can then communicate
immediately over the created connections after the configuration data have
been downloaded.
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Use this variant when you want to operate projects separately due to the
complexity.
Stations of the type SIMATIC S5 function in just the same way as
representative objects.
Merging Projects in the Multiproject:
If you have used the multiproject functions allowing you to use connections to a
partner in an unknown project, STEP 7 will automatically attempt to synchronize
two separately configured connections.
If you have configured projects with representative objects and want to merge
these projects into a multiproject, you have the following options:
40
S
You can leave the representative objects with the configured connections
unchanged.
S
You can reassign the connection partner and then delete the representative
objects.
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1.7.5
Network/Project Variant: Several Subnets in Several (Sub)
Projects
Configuration of the System
If several network types need to be used and if these need to be managed in
different projects due to the different tasks of the stations or due to the large span
of the plant, stations can be created as follows:
S
Using (sub) projects in the “multiproject”
S
by configuring “Other stations / SIMATIC S5” in the other project.
Ethernet (1)
Cell level = (sub)project 1
S7 – 400/1
Ethernet CP
PROFIBUS CP
Cell level = (sub)project 2
PROFIBUS (1)
S7 – 300/1
S7 – 300/2
Organization in a Multiproject
If you use a multiproject organization, follow the steps below to connect the
S7-400/1 station to the PROFIBUS (1) subnet:
Create a subnet of the type PROFIBUS in both subprojects and merge these two
subnets in NetPro.
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Representative Objects for Stations Outside the Current Project
If you do not want to use the multiproject functions, you can fall back on the use of
representative objects as used previously.
To be able to network the representative objects, you must once again create a
subnet of the type PROFIBUS in both projects as shown in the example here.
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1.7.6
Network/Project Variant: Connections between Subnets
(TCP/IP)
Configuration of the System
If connections are required to stations on network structures connected by routers
due to the differing tasks of the stations or the large span of the network, the
stations in the other project can be reached by configuring “Other Stations”.
S7 – 400/1
Ethernet CP
Ethernet (1)
Router *
Ethernet (2)
WAN
Internet *
S7 – 400/2
S7 – 300/1
Ethernet CP
View in a STEP 7 Project
* only TCP/IP
If the stations in the two networks are managed in the same project, the
networking appears as shown below in NetPro.
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with STEP 7
2
To attach a SIMATIC station to Industrial Ethernet via the Ethernet CP, configure
the CP with the NCM S7 configuration software. The chapter explains the
following:
S
How the CP is configured in the STEP 7 project
S
How the various network configurations are managed (setting up access to
other systems)
S
How to control and supply the CP with data using NCM S7
You will find further information in the following sources:
S
When installing the Ethernet CP, please refer to the instructions in the manual
/1/ supplied with the Ethernet CP. This also contains further information about
the performance of the Ethernet CP .
S
For more information about the functions and applications of STEP 7 in which
the NCM S7 option is integrated, please read the following topics:
– For using the help functions, read the section Working with STEP 7 in /6/.
– Configuring and assigning parameters to modules in /6/
– Configuring networks in /6/. You will find this information in the online help
with integrated in STEP 7 by selecting Help " Contents.
S
You will find examples of configurations in the Primer /3/.
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2.1
General Information About the NCM S7 for Industrial
Ethernet Option
Installation
Please follow the instructions in the README file when installing the NCM S7 for
Industrial Ethernet option on your PG/PC under STEP 7.
Functions
NCM S7 consists of the following:
S
CP-specific index dialogs that you call using the properties dialog box of the
modules.
S
Dialogs for the connection configuration
S
Diagnostic functions that you obtain as follows:
– Using the “Diagnostics” tab in the properties dialog
– Using the standard Start menu of Windows with which you can call the
SIMATIC program group
S
Functions displayed with SIMATIC
"
NCM... in the Start menu of Windows:
– Diagnostics
– Help for functions (FCs)
– “Readme” file with current information about NCM
– Firmware loader
Operation
Operating and handling the software package is as explained in the STEP 7 user
manual /6/.
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2.2
Procedure
A CP is managed in an S7 project just as the other modules. You use STEP 7 to
configure the hardware and create and manage the user software (see /6/).
Configuring a CP involves the following basic steps (the broken lines indicate
options):
Create the Industrial Ethernet subnet (see 2.2.1)
Check or set the network properties
Enter the Ethernet CP in the hardware configuration
(see 2.2.2)
Attach the Ethernet CP to the Ethernet subnet
(see 2.2.2)
Display the network attachments of a station (see 2.2.3)
Make further CP settings (see 2.2.4)
Configuring communication connections (Chap. 4)
– S7 connections /6/
– ISO transport connections
alternative:
– ISO-on-TCP connections
Program communication
– TCP connections
connections
– UDP
(see Chapter 5)
Configuration data in
the STEP 7 project
Programming the
SEND/RECEIVE interface
(see Chapter 3)
User programs in the STEP
7 project
Download the configuration to the PLC (see 2.4).
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2.2.1
Creating an Industrial Ethernet Subnet
Aims
To be able to attach the SIMATIC stations to a subnet, you create the subnet in
your project. This means that all the parameters for the entire subnet are managed
centrally.
Procedure
It is advisable to create the subnet before you configure the stations since the
assignment of the SIMATIC stations is then performed largely automatically.
It is also possible to create the subnet at a later point in time when configuring a
CP. This is explained in more detail later in the chapter.
Follow the steps outlined below:
1. Select the project in the SIMATIC Manager.
2. Select Insert
"
Subnet
"
Industrial Ethernet.
Result: An object of the type network is created in the project. This allows all
the SIMATIC stations created in the project to be attached to this subnet.
Figure 2-1
48
Project with Assigned Ethernet Network
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3. If you prefer a NetPro graphic network display, select the network object
“Ethernet” and confirm with Edit " Open Object.
Figure 2-2
Graphic Network Representation (here showing stations not yet networked)
From this graphic representation, you can also activate all the functions for
networking and configuring connections with the Ethernet CPs.
You can also create the subnets in NetPro! Open the catalog using the menu
command Insert " Network Objects.
Organization in a Multiproject
If you use the multiproject form of organization, this has the following effects when
creating subnets.
You create subnets initially in the subprojects as described above. To be able to
network S7 stations, you will, for example, need to create a suitable subnet of the
type Industrial Ethernet in each subproject.
If this is physically a subnet that extends beyond the boundaries of the subproject,
you should first merge the subnets before configuring the communication
connections between the S7 stations.
If you do not merge the subnets, NetPro assumes that you are connecting the
subnets via routers and displays warning messages to this effect.
Properties of Merged Subnets (Multiproject)
When you merge subnets, transferable subnet properties such as the subnet ID of
the master subnet will be transferred to the other subnets of the group.
Some parameters relate specifically to a subproject and remain unchanged; these
include, for example, descriptive parameters such as the name, author, and any
comments.
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Notice
Preserving Consistency in Merged Subnets
After merging the subnets, you should check the consistency throughout the multiproject using the menu command Network > Check Interproject Consistency in
NetPro to make sure that there is consistency throughout the multiproject. This
check detects, for example, S7 subnet IDs that are not unique within the multiproject.
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2.2.2
Entering an Ethernet CP in the Hardware Configuration
Procedure
By installing and assigning the Ethernet CP in the rack of a SIMATIC station, you
establish the logical attachment between the Internet CP and the subnet.
1. Select the station in your project that you want to attach to Industrial Ethernet
using an Ethernet CP.
2. Select the CP in the hardware configuration just like any other module by
selecting it in the hardware catalog and then selecting the slot in the rack.
You select CPs in the hardware catalog using a short text and the order
number. Once you have installed NCM S7, the CPs are available in the catalog.
Result: The CP is assigned to the SIMATIC station.
For information about the permitted slots, refer to /1/.
How to configure a module with STEP is described in detail in /6/.
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Subnet Attachment
To allow you to activate the network attachment of the Ethernet CP, the SIMATIC
Manager displays the following dialog:
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Note
You can open the dialog for setting the interface at any time from the Properties
dialog of the CP in the “General” tab.
1. If you have not yet created a subnet in the project or have not yet created the
selected subnet, you can now create a subnet. To do this, select the “New”
button.
Result: An object of the type network is created in the project.
2. Check the addresses and if necessary change them. The system enters the
next free address automatically.
You will find detailed information on the address ranges in the online help.
Please note the following additional information:
– MAC address
The latest Ethernet CPs are supplied with a default MAC address (address
printed on the module). To be sure that you have a unique address
assignment, do not enter a MAC address in the configuration (the option is
deactivated). This means that the module automatically uses the factory-set
address. If you want to use ISO services, we recommend that you enter the
address printed on the module in the configuration.
Note
The “IP address” and “Subnet mask” input fields have no significance for ISO
transport (option “IP protocol being used”).
3. Select the required subnet type in the “Subnet” list box.
4. You can display the properties dialog box for the selected subnet by clicking the
Properties button.
5. Enter information specific to the subnet node in the “General” tab.
6. You must finally confirm your input with OK, otherwise the networking is not
entered (refer to Point 3.).
Result: The CP is now configured as a network node for the corresponding S7
station.
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Setting Addresses in the Configuration and Addressing for the First Time
The address settings described here are made on the CP only after you download
the configuration data.
With the latest Ethernet CPs, the situation is as follows:
To be able to reach the CP using these addresses before you download the
configuration data, you can address the CP using its default MAC address and
then supply it with project-specific address information.
How to do this is described in Section 2.3.
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2.2.3
Displaying the Network Attachments of a Station
Procedure
You can easily get an overview of the network attachment configurations of a
SIMATIC station in one of the following ways:
S
A graphic overview in NetPro;
S
An overview in table form in the Properties dialog of the station
Graphic Overview in NetPro
The NetPro view provides you with a good overview of the networked stations:
Follow the steps below:
1. Double-click one of the network objects, for example Ethernet in your project in
the SIMATIC Manager.
Figure 2-3
NetPro View of a Subnet of the Type Industrial Ethernet
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Installing and Starting the Ethernet CP with STEP 7
Overview in Table Form
The table view in the Properties dialog of the station provides a detailed overview
of the components used for network attachment.
Follow the steps below:
1. Using the SIMATIC Manager, select the station in your project that you want to
check.
2. Select the Object Properties using the menu option Edit
or by double-clicking the station symbol.
"
Object Properties
3. Select the “Interfaces” tab.
Result:
Figure 2-4
“Interface” Tab in the “SIMATIC 300/400” Properties Dialog Box
In the displayed dialog, you can see the subnet attachments that were configured
for the SIMATIC station.
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2.2.4
Setting Further CP Properties
Overview
In addition to the network attachment, you can also make further settings for the
specific module or you can call functions.
1. Select the Ethernet CP in the hardware configuration.
2. Select Edit " Object Properties. Depending on your type of CP, the dialog
includes other tabs in addition to the “General” tab described in Section 2.2.2:
Tabs
Settings for
General
Interface
Addresses
Interface parameters for the user
program
Options
Time-of-day synchronization
Data transfer
Replace module without PG
Ethernet profile for fault-tolerant connections
Individual network settings
Send keepalives for connections
Multiplex OP connections / reserve internal CPU
connection resources
Time-of-Day Synchronization
SIMATIC mode
NTP mode (NTP: Network Time Protocol)
User
Specify user permissions for IT functions
Symbols
Symbolic access to variables using IT
functions
DNS parameters
Specify the address for the domain name
server for E-mail services
Diagnostics
Call NCM diagnostics (special diagnostics /
module diagnostics)
Addressing
Select the station to initialize
Assign configured IP parameters
F1
IP Access Protection
Edit the IP access list
IP Configuration
Set the IP address
Please read the description of the Properties dialog of the CP in the integrated
help. The functions are explained in detail there.
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Addresses Tab
The Addresses tab displays the address at which the module can be addressed by
the user program. You require this address when calling the FCs for transport
connections –> see Chapter 6.
Notice
Please note the following notes on S7-300 stations:
If you selected the “Update OB1 process image cyclically” option in the CPU configuration (default), you must set the module base address of the Ethernet CP outside the process image (base addresses in the “Addresses” tab).
Example: If the size of the process image selected for the CPU is 1024 (0...1023),
the address for the Ethernet CP must be set equal to or higher than 1024.
Options Tab
Depending on the CP type, you can make the following settings:
Table 2-1
Settings in the “Options” Tab
Meaning / Effect
Option
S Time-of-Day Synchronization
Here, you decide whether the CP passes on time-of-day frames or
not. You require this function if you have several CPs in a station
since only one CP (on the same network) is permitted to forward the
time synchronization messages.
Note
The time-of-day synchronization function does not exist for all module
types.
S Data transfer > 240 bytes
With this option, you specify whether or not the CP will support jobs
with a data length of more than 240 bytes (for S7-300 stations).
Notes
S The transfer of more than 240 bytes of data is supported by
newer version CPs. Please note the information in the product
information bulletin / manual of the Ethernet CP.
Please note the information in Section 6.1 on the
newer CP types.
S Remember that with this configuration on an S7-300, one
connection resource (free connection for S7 functions) of the
S7-300 CPU is used. CPU connection resources are also used,
for example, by S7-300 CPs, in the FMS mode or by Pg. and Pos.
For more detailed information about the maximum connection
resources, refer to /13/ and /7/.
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Table 2-1
Settings in the “Options” Tab , continued
Option
S Replace Module without PG
Meaning / Effect
With this option, you can have the configuration data of the CP stored
on the CPU. If you then replace CP, the configuration data for the
new CP are downloaded automatically from the CPU when the CP is
started up.
If you select this option, the configuration data are stored long-term
on the CPU instead of in the EPROM of the CP. Remember, however,
that long-term storage on the CPU is only safe from power outages if
the CPU is protected by battery backup or by using an S7 Memory
Card.
Note
If you store the configuration data on the CPU, please read the note
below.
The following functions do not modify the configuration data on the
CPU:
S Reset module memory
S Resetting to factory settings
S Assigning an IP address1) (using the target system selection in
the SIMATIC Manager or the properties dialog in HW Config or
NetPro)
If you subsequently upload the configuration data from the CPU to a
PG you will always object the configuration data that were previously
on the CP (with parameters, connections, IP address).
1) Note: You should only use the assign IP address function during
commissioning; in other words, before downloading the configuration
data.
S Ethernet Profile for
Fault-Tolerant Connections
Select this profile if you use fault-tolerant communication in your
system. Fault-tolerant communication means that Industrial Ethernet
is designed with redundancy and that you have configured
fault-tolerant S7 connections.
If you select the Ethernet profile for fault-tolerant connections here,
the time response of the S7 connections is adapted. As a result,
breakdowns of a connection are detected more quickly and the
failover to redundant connections is faster.
Note
Select the Ethernet profile for fault-tolerant connections only when
you actually use fault-tolerant S7 connections. Otherwise you must
expect your system to be more susceptible to problems since, for
example, the number of transfer or connection establishment
attempts is reduced compared with non-redundant systems.
S Individual Network Settings
Here, you can make fixed network settings, when necessary. As
default, “Automatic Setting” is selected and this setting generally
guarantees problem-free communication in most situations.
If problems occur in communication (for example, when connections
are not established or when there are often disturbances on the
network), the reason may be that the selected or automatic network
settings are not suitable. You can then select a network setting to suit
your network configuration.
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Table 2-1
Settings in the “Options” Tab , continued
Option
S Send Keepalives for
Connections
Meaning / Effect
Here, you can set the interval at which keepalives are sent to the
partner of a communications connection. This setting decides the
latest time after which the failure of a communications partner is
detected.
For all connection-oriented services, the Ethernet CP is configured so
that keepalives are sent. This guarantees that connections are
closed if a communications partner fails and that the connection
resources are released. The setting made here applies to all TCP
and ISO-on-TCP connections operated via the CP; a
connection-oriented setting is not possible.
Possible values:
Default Setting:
30 seconds
Turn keepalives off
0 seconds
Maximum value:
65535 seconds
Notes / Recommendations:
Remember that the keepalive mechanism can keep underlying
connections established (for example, an ISDN telephone
connection) although no user data are actually being transmitted. If
this is not required, set the interval so high that the underlying
connection is closed down when no further user data are sent before
a keepalive is sent.
S Multiplex OP Connections /
Reserve Internal CPU
Connection Resources
To attach TD/OPs or HMI devices, you can optimize the connection
resources on the S7-300 CPU by having up to 16 of these devices
communication on a single CPU connection resource (multiplex
mode).
If you do not use this option, the number of operable TD/OPs or HMI
devices depends on the number of available connection resources of
the CPU you are using.
As default, this option is deactivated. This means that a CPU
connection resource is used for multiplex only when necessary.
Configured S7 connections over the CP use the same multiplex
channel as you use for multiplexing the HMI connections. If you
configure S7 connections, this means that one CPU connection
resource is already used.
Please note: PG connections do not use the multiplexer; if you use a
PG, one connection resource is always occupied.
Note on Programming:
When you use the multiplex mode, you must specify the rack/slot
assignment of the CP for addressing on TD/OP/HMI connections
instead of the rack/slot assignment of the CPU!
Applications (for example ProAgent) that require block-related
messages (Alarm_S: SFC17-19) are not supported in the multiplex
mode.
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Time-of-Day Synchronization Tab
In this tab, you can make the settings for one of the two synchronization modes
explained below:
S
SIMATIC mode
If the CP receives MMS time-of-day frames, its local time is synchronized
providing the NTP mode was not configured (MMS = Manufacturing Message
Specification).
The advantage of this mode is the accuracy that is generally higher than
achieved with the NTP mode.
S
NTP mode (NTP: Network Time Protocol)
In the NTP mode, the CP sends time queries (in the client mode) at regular
intervals to the NTP server in the subnet (LAN). Based on the replies from the
server, the most reliable and most accurate time is calculated and the time of
day on the station is synchronized.
The advantage of this mode is that the time of day can be synchronized beyond
the boundaries of the subnet.
Diagnostics Tab
In the “Diagnostics” tab, you can startNCM S7 Diagnostics.
See Chapter 7 Diagnostics for a description of the diagnostic functions themselves.
Addressing Tab
In the “Addressing” tab, you can assign the previously configured IP address and
IP parameters to the CP.
This is necessary before the configuration data can be downloaded to the CP over
Ethernet.
For a detailed description, refer to Section 2.3.
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IP Access Protection Tab
V 5.2.1
Using IP access protection gives you the opportunity of restricting communication
over the CP of the local S7 station to partners with specific IP addresses. Partners
you have not authorized cannot access data of the S7 station over the CP using
the IP protocol.
In this tab, you can activate or deactivate IP access protection and can enter IP
addresses in an IP access control list (IP-ACL).
As default, IP access protection is deactivated.
S
IP access protection for configured connections with specified partners
If you want to restrict access to the precise set of partners you specify during
connection configuration, you simply need to activate access protection. In this
case, you do not need to enter IP addresses in list.
Remember, however, on unspecified connections, all other IP addresses are
unauthorized and are rejected.
IP access protection relates to all connection types handled using the IP
protocol (TCP, ISO-on-TCP, UDP)
S
IP access protection for partners with specific IP addresses
To allow IP access for specific IP addresses, enter these IP addresses in the IP
access control list.
The IP addresses you specify when you configure the connection always
belong to the permitted IP addresses and do not, therefore, need to be entered
explicitly in the IP-ACL.
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IP Configuration Tab
In this tab, you can decide the route and the method with which the IP address of
the local S7 station is obtained and assigned.
V 5.2.1 With the options available here, it is also possible to assign IP addresses
dynamically outside the STEP 7 configuration.
Table 2-2
Options in the “IP Configuration” Tab
Meaning / Effect
Option
S Set IP address in the
“Properties – Ethernet
Interface” dialog
This option is the default.
It means that the IP address is set during the networking of the
Ethernet CP. The IP address of the CP is therefore fixed in the
configuration.
You must select this option if you want to configure specified
connections.
S Obtain an IP address from a
DHCP server
If you select this option, the IP address is obtained from a DHCP
server when the S7 station starts up.
The DHCP server is informed of the MAC address of the CP or the
client ID that you can enter here.
Requirement / Restriction:
If you select this option, it is initially not possible to create a fully
specified connection in the STEP 7 project because the local IP
address is not known.
You must therefore select “unspecified” with passive connection
establishment as the connection type.
Please not the following:
If the connections are configured over the interface in the user
program, you must use the option “Set IP address in the user
program” as described below. This also applied if the IP address is
obtained from a DHCP server.
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Table 2-2
Options in the “IP Configuration” Tab, continued
Option
S Set IP address in the user
program
Meaning / Effect
With this option, you specify that the IP address is set over a user
program interface (function block IP_CONFIG). This allows the IP
address to be supplied dynamically during operation.
In this situation, communication connections are created only over
the user program interface; configuring connections using STEP 7 is
not possible (relates to connections over IP: TCP, ISO-on-TCP, UDP).
This setting does not preclude the IP address being obtained from a
DHCP server. It is possible for the user program to instruct the
module to obtain an IP address in this way.
Further information:
Read the section “Programmed Communication Connections” and
refer to the example in the appendix of the manual.
S Set IP address using a
different method
With this option, you specify that the IP address is set by other
services outside STEP 7.
In this situation, configuring connections using STEP 7 is not possible
(relates to connections over IP: TCP, ISO-on-TCP, UDP).
Note
You can query the IP address actually being used with NCM S7 Diagnostics.
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2.2.5
“Substitute Objects” in the STEP 7 Project
Overview
Communication connections can be configured fully when the communications
partners are available in the current project. For the stations on the Ethernet
subnet, whose configuration data were not created in STEP 7 or whose
configuration data are not managed in the currently active project, the following
substitute objects can be created in the project:
S
SIMATIC S5 stations
S
PG/PC
S
Other stations
– for devices of other manufacturers
– for SIMATIC S7 stations in another project (not necessary in a multiproject)
Note
Instead of creating substitute objects, you can also configure unspecified
connections for connections to the stations listed above.
In the Properties dialog of these connections, you must then specify the full
partner address. These partners do not appear in the NetPro plant view.
Plant
“Production 1”
S7-400/1
Plant
“Production 2”
S7-400/2
PC/PG
S7-400/4
Non-Siemens
device
Ethernet subnet (1)
S7-400/3
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Procedure
To enter a substitute object in the project, following the steps below:
1. Select the project in the SIMATIC Manager.
2. Select the menu command Insert " Station " and then as necessary
Other Station, PG/PC or SIMATIC S5.
Possible result: the selected object is created in the project.
Figure 2-5
Project With Substitute Objects Configured
Attaching Non-S7 Stations to the Subnet
The next step is to assign the substitute objects to the subnet, as follows:
1. Select the required object in the project and select Edit
"
Object Properties.
2. In the Properties dialog box that is displayed select the “Interfaces” tab and
click the “New” button (for example “Other Station”.
Result: The New Interface – Type Selection dialog box is displayed.
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Figure 2-6
Selecting the Subnet Type for “Other Station” (Example)
3. Select a subnet.
Result: The “Properties – Ethernet Interface” dialog is displayed. Here, you can
select the subnet, connect the station to the network and set the address (MAC,
IP). All the SIMATIC stations in the project can establish communication
relationships to this substitute object.
The addresses (MAP/IP) configured for the substitute object here must also be set
on the station using the appropriate tool, for example COM 1430.
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2.2.6
Configuring Communication Services
Setting Up Connections
You must set up connections for the connection-oriented services supported by the
Industrial Ethernet CP, see also the Table in Section 1.2.
S
S7 connections
see the STEP 7 user manual /6/
S
ISO transport connections
see Section 4.4
S
ISO-on-TCP connections
see Chapter 4.5.
S
TCP connections
see Section 4.6
S
Connections for UDP
see Section 4.7.
S
Interconnections for PROFInet communication
see manual Component based Automation – configuring plants with SIMATIC
iMap /23/
The information in the STEP 7 user manual /6/ in the chapter “Creating
Communication Connections Between Two Programmable Modules” also applies
to the additional types of connection possible with the CPs.
You will find this information in the online help with integrated in STEP 7 by
selecting Help " Contents. Select the topic “Configuring Connections and Data
Exchange.
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2.3
Assigning Addresses for the First Time (Applies to
Latest CPs)
Meaning of the Address Assignment – MAC Address and IP Address
The CP ships with a factory-set MAC address. Without further configuration, the
device can only be accessed over the Ethernet port using this MAC address.
In its original state, you can already use the following functions via the CP using
the ISO protocol and the factory-set MAC address:
S
Download the defined configuration to the CP or CPU
S
Run diagnostics on the CP or CPU
Before you can download defined configuration data to the device using an IP
address, you must first assign an IP address to the CP.
Assigning the Address – Options and Recommendations
There are three ways of assigning this address in STEP 7:
S
Addressing by selecting the target system in the SIMATIC Manager
This option allows you to assign the address without having to set up a STEP 7
project. This is useful, for example, if you want to download defined
configuration data you created offline to the S7 station.
This is described in Section 2.3.1.
S
Addressing using the properties dialog in HW Config or NetPro
This option assumes that the CP was networked in STEP 7. The advantage of
this method is that the IP parameters set during configuration in STEP 7 /
NetPro can be used.
In the “Addressing” tab, you assign the previously configured IP address and IP
parameters to the CP.
This is necessary before the configuration data can be downloaded to the CP
over Ethernet.
This is described in Section 2.3.2.
S
Downloading configuration data using the ISO protocol
Another option is to download configuration data with a defined IP address
using the ISO protocol (see above).
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Requirements
Before you can use the addressing described here, the CP must be obtainable
online, which means:
S
An attachment to the Ethernet LAN must already exist; there must be no
routers between subnets in the path.
S
The Ethernet port of your PG/PC must be accessible to STEP 7.
Notice
The options for assigning an address as described here are available only if you
have a module that can be reached using the default MAC address; such modules
must support the PST (Primary Setup Tool) function. Please refer to the information in the relevant manual /1/.
2.3.1
Addressing by Selecting the Target System in the SIMATIC
Manager
Follow the steps below to assign the IP address the first time:
1. Open the SIMATIC Manager
2. Select the menu command PLC
70
"
Assign Ethernet Address.
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3. Start a network search for available modules by selecting the “Browse...”
button.
4. Select the CP with the matching MAC address from the components listed.
5. Enter the required IP parameters and assign them to the CP.
Result:
The CP is now accessible on Industrial Ethernet using the IP address.
Note
You will find further detailed information on this procedure in the STEP 7 online
help.
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Alternative Procedure
You can also follow the steps outlined below in the SIMATIC Manager:
1. Use the menu command PLC" Display Accessible Nodes to display the
nodes that you can access over Industrial Ethernet.
2. Select the required node in the list displayed.
3. Then select the menu command PLC" Ethernet Address.
Result: The previously selected node is entered directly into the “Addressing”
dialog. You cannot modify the MAC address of the node.
4. Enter the required IP parameters and assign them to the CP (see above under
STEP 5.).
Result:
The CP is now accessible on Industrial Ethernet using the IP address.
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2.3.2
Addressing using the Properties Dialog in HW Config or NetPro
Follow the steps below to assign the IP address the first time:
1. Open the SIMATIC Manager.
2. Define the configuration of your S7 station with the appropriate components in
HW Config in an existing or newly created project.
3. When you create the CP, network it with an Industrial Ethernet subnet.
When you create the CP in HW Config, the necessary dialog is displayed in
which you can network the device and assign the IP address.
4. Select the “Addressing” tab in the properties dialog of the CP you want to
address.
The tab displayed is identical to the dialogs illustrated in Section 2.3.1.
5. Start a network search for available modules by selecting the “Browse...”
button.
6. Select the CP with the matching MAC address from the components listed.
7. Assign the IP parameters taken from the networking to the CP by clicking the
relevant button.
Result:
The CP is now accessible on Industrial Ethernet using the IP address.
Note
You will find further detailed information on this procedure in the STEP 7 online
help.
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2.4
Downloading the Configuration Data to the Target
System
Principle
The configuration data of the Ethernet CP are downloaded from the hardware
configuration. All the configuration data of the S7 station are downloaded including
the central configuration, all relevant DP master systems and all parameter
settings.
The data of the configured connections must also be downloaded, see below.
Type of Interface
You can download the configuration data to the S7 station on the following paths
(interfaces):
S
MPI interface
You can use this interface to download configuration data or when assigning a
MAC/IP address for the first time (node initialization – for details, refer to the
manual /1/ “Assigning Addresses for the First Time”).
S
Industrial Ethernet
Here, you use the PG mode of the Ethernet CP in the S7 station (see also
Section 1.3).
Depending on the PG/PC interface used by the station on which you create
your configuration, you can download the defined configuration data to the S7
station over the TCP/IP interface or over the ISO interface of STEP 7.
– When you download over the IP interface, the CP must already have been
assigned an IP address; refer to Chapter 2.3.
– When you download over the ISO interface, you can use the preset MAC
address. However, please note the following:
Note
If you want to download the configuration data over the ISO interface to a CP with
an unchanged, factory-set MAC address and you have configured a different MAC
address in your STEP 7 project, you must start the download in NetPro or HW
Config; this is the only way you will be prompted to enter the current MAC
address. The SIMATIC Manager, on the other hand, aborts the download if the
target station cannot be reached.
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Procedure
To download the configuration data to the S7 station, follow the steps outlined
below:
1. Open the “Set PG/PC Interface” dialog box in the Windows Control Panel.
2. Set the PG/PC interface according to the CPs available on your PG and
according to the bus attachment (interface parameter assignment used).
For more detailed information, refer to the integrated help system.
F1
3. Change the CPU to the STOP mode (regardless of the type of interface – see
above).
4. Select the menu command PLC
"
Download to Module.
STEP 7 then guides you through dialog boxes. Note the additional information in
the “STEP 7 User Manual”, Chapter “Configuring and Assigning Parameters to
Modules” /6/.
Deactivating the MAC Address in the Configuration
If you deactivate the use of the MAC address when you are configuring the CP, the
CP can be reached via the preset MAC address, however you cannot define any
ISO transport connections or S7 connections over ISO connections in your
configuration.
Saving the Configuration Data in Non-Volatile Memory
You can download the configuration data step-by-step or all at once. If you
download step-by-step, you will be prompted to start the download function
separately for each module. You must select this method if you want to save the
configuration data in non-volatile memory on the Ethernet CP. In this case, select
the “Copy to ROM” button in the “Download” dialog for the CP.
Downloading the Configured Connections
To download configured connections, you use a corresponding download function
in the connection configuration (NetPro).
Notice
If you have assigned a new address to the Ethernet CP or have configured
connections, you must always download the connection configuration again.
Remember that you also make suitable address adaptations for the other stations
or “substitute objects”.
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Relocating the CP in the Hardware Configuration
If you are using communication services with configured connections, the
connection IDs also identify the slot of the CP. If you “drag” a CP you have already
configured to a different slot, note the following:
Notice
If you drag the CP to a different slot, the data of the connection configuration are
automatically updated. The data of the connection configuration must, however, be
downloaded again!
-
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SEND/RECEIVE Interface in the User
Program
3
This chapter explains the following:
S
How to send and receive data.
S
Which data areas can be used on the S7 CPU.
S
How to program the SEND/RECEIVE interface in the user program.
You will find further information in the following sources:
S
For programming and configuring nodes for connections (for example a
SIMATIC S5 PLC with the CP 1430 TCP, PC with CP 1613), please refer to the
appropriate manuals.
S
The FCs for programming connections are described in Section 6.3.
S
Configuring the Ethernet CP with NCM S7 is described in Chapter 4.
S
Programming communication connections over the interface in the user
program is described in Chapter 5.
Sample programs:
Sample configurations and programs are available for the SEND/RECEIVE
interface described here:
S
In the sample project PROJECT_ETHERNET that you can start immediately
after installing NCM S7; for a description, refer to the Primer /2/.
S
On the Internet as downloadable sample projects; refer to the information in
Appendix C “Support and Training”.
The Quick Start CD that can be ordered separately is a
treasure-trove of sample programs and configurations.
You can order this directly over the Internet at:
http://www4.ad.siemens.de/view/cs/de/574211
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3.1
How the SEND/RECEIVE Interface Works on the CPU
Functions (FCs)
The following functions (FCs) are available for handling communication on
connections:
S
AG_SEND/AG_LSEND
This block takes the user data from the specified user data area and transfers it
to the Ethernet CP.
S
AG_RECV/AG_LRECV
This block transfers received user data to the user data area specified in the
call.
The diagram below illustrates the situation. Using the FCs AG_SEND/AG_LSEND
and AG_RECV/AG_LRECV, the user program instructs the Ethernet CP to send or
receive data on the configured connection.
Ethernet station SIMATIC S7
CPU
Ethernet CP
CP
database
STEP 7
user program
User data
buffer
User data areas
Figure 3-1
AG_SEND
send
AG_RECV
receive
Communication
connection
Interaction of the CPU and Ethernet CP on Connections
Amounts of Data
The Ethernet CP can transfer the amounts of data shown in the table below per job
on one connection:
Table 3-1
78
ISO Transport
ISO-on-TCP
TCP
UDP
Sending
8192 bytes
8192 bytes
8192 bytes
2048 bytes
Receiving
8192 bytes
8192 bytes
8192 bytes
2048 bytes
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3.2
Programming the SEND/RECEIVE Interface
Principle of Job and Data Transfer
The user program triggers the transfer of the user data areas with FC calls and
monitors the transfer by evaluating the return codes of the FCs.
The following parameters are transferred when the FCs are called:
S
The number of the connection (ID)
S
The location of the user data area in the CPU
For detailed information about the call interface see Chapter 6.
Purpose of the FCs
Calling the function blocks has the following effects:
S
The user data area is transferred to the Ethernet CP or received from the
Ethernet CP.
S
The execution of the job is confirmed positively or negatively in a status
message.
Procedure
Program the SEND/RECEIVE interface in the user program as follows:
1. Use the following functions (FCs) for data transmission on connections:
– AG_SEND / AG_LSEND for transferring the user data area to the Ethernet
CP
– AG_RECV / AG_LRECV for entering data received from the Ethernet CP in
the user data area
2. Evaluate the following bits in the FCs:
– for AG_SEND / AG_LSEND the parameters DONE, ERROR, STATUS
– for AG_RECV / AG_LRECV the parameters NDR, ERROR, STATUS
Notice
Connection numbers (IDs) must be taken from the configuration when
programming.
To ensure correct parameter settings for the block calls, The LAD/STL/FBD editor
in STEP 7 provides you with the option of accepting all the relevant parameters
from the hardware configuration (HW Config) and from the connection
configuration. For more information, refer to Section 6.2
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Calling FCs in the CPU Program
One possible sequence for FCs in conjunction with the organization and program
blocks in the CPU cycle is illustrated in the following diagram.
Read in the received
data of the
connection
Read PII
OB
User program
AG_RECV
Communication
connection
ÇÇÇÇÇÇÇÇ
ÇÇÇÇÇÇÇÇ
AG_RECV
ÇÇÇÇÇÇÇ
ÇÇÇÇÇÇÇ
ÇÇÇÇÇÇÇ
ÇÇÇÇÇÇÇ
ÍÍÍÍÍÍÍÍ
ÍÍÍÍÍÍÍÍ ÍÍÍÍÍÍÍ
ÍÍÍÍÍÍÍ
ÍÍÍÍÍÍÍ
ÍÍÍÍÍÍÍ
ÍÍÍÍÍÍÍÍÍ
ÍÍÍÍÍÍÍÍÍ ÍÍÍÍÍÍÍ
ÇÇÇÇÇÇÇÇÇ
ÇÇÇÇÇÇÇÇÇ
ÇÇÇÇÇÇÇÇÇ
Communication
connection
AG_SEND
AG_RECV
Communication
connection
AG_SEND
Transfer send data
for the connection
AG_SEND
Write PIQ
Legend:
Figure 3-2
ÍÍ
ÇÇ
ÍÍÇÇ
Sequence of the CPU cycle
The different shading shows which
connections and FC blocks belong
together.
Typical Sequence of Function Calls in the CPU Cycle
The following points are illustrated by the diagram:
80
S
The user program consisting of any number of blocks (OBs, FBs or FCs –> see
also /6/ accesses several connections (Figure 3-2 illustrates three connections).
S
At various points (event and program-controlled) the user program sends data
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on a connection using the AG_SEND call.
S
At various points in the CPU cycle, the user program accepts the data received
on the connection using an AG_RECV call.
Note
The blocks can also be called more than once in a cycle for the same
communication connection.
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3.3
Data Exchange S7 CPU <–> Ethernet CP
The Ethernet CP processes the send and receive jobs independent of the CPU
cycle and requires one transmission time. The interface to the user program with
the FCs is synchronized by an acknowledgment. Two situations must be
distinguished:
S
The CPU cycle is faster than the transmission time.
S
The CPU cycle is slower than the transmission time.
Note
Please refer to the sequence charts for the FCs in Chapter 6. These charts show
how to handle the SEND/RECEIVE interface in the user program for problem-free
data exchange.
Remember the points below about the CPU cycle and transmission time.
FC Calls Faster than the Transmission Time
If a block is called again in the user program before data were transferred or
received, the procedure is as follows on the interface of the FCs:
82
S
AG_SEND/AG_LSEND:
No further job is accepted until the transmission of the data on the connection
has been acknowledged by the Ethernet station. During this time, the user
program receives the message “job active” until the Ethernet CP can accept the
next job on the same connection.
S
AG_RECV/AG_LRECV:
The job is acknowledged with the message “no data available yet” if there are
no received data on the Ethernet CP. The user program receives this message
in the CPU cycle until the Ethernet CP has received data again on the
connection.
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FC Calls Slower than the Transmission Time
If a block is called again before the data were completely transferred or received,
the procedure is as follows on the interface of the FC blocks:
S
AG_SEND/AG_LSEND:
The job is positively acknowledged. The Ethernet CP is ready to receive a new
send job (at the earliest however with the next call).
S
AG_RECV/AG_LRECV:
The job is acknowledged with “New Data Received” when the data have been
transferred to the user program. Following this, the FC call can be repeated.
Notice
Remember that resource shortages can occur if the processing speeds on the
sender and receiver are not the same (sender faster than receiver).
The sender receives a message from the FCs if problems occur (“No resources on
the destination station”).
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3.4
3.4.1
Additional Information
Programming Data Transfer on TCP Connections
Purpose of TCP Connections
TCP connections should be used above all for connections to systems of a
different type if they do not support RFC1006.
For communication between devices of the SIMATIC family, you should use the
more convenient ISO-on-TCP connections! The following sections explain certain
special points to note.
Special Features
S
Block types (FC calls)
Use only the following functions (FCs) for data transmission:
– With the S7-CPs for S7-400, you must use FCs AG_LSEND (FC 50) and
AG_LRECV (FC 60) on TCP connections!
– With the latest S7-CPs for S7-300, you also use FCs AG_SEND (FC 5) and
AG_RECV (FC 6) for TCP connections.
S
Frame length
On the TCP connections, the protocol contains no information about the end of
a message and start of a new message.
The receiving station must therefore know how many bytes belong to a
message and transfer an ANY pointer corresponding exactly to this length when
FC AG_LRECV is called. (Example: if 100 bytes of data are always transferred,
the ANY pointer could appear as: P#DB100.DBX 0.0 Byte 100)
If you want to receive data with a variable length, follow the steps below:
Include information on the length of the user data in the frame before the actual
user data. Initially, you should only evaluate the length information on the
receiving station. Fetch the appropriate length of user data in another receive
job by specifying an ANY pointer of the required length on the FC interface for
fetching the actual user data.
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3.4.2
Recommendations for Use with a High Communications Load
Overview
The points below will help you to avoid overload situations on your CPU when
using the Ethernet CPs.
In particular when you replace an older CP with a newer CP and are then
confronted with overload problems, you should check your application for the
pitfalls outlined below.
Known Problems
S
The functions for sending and receiving (FC5/FC6 or FC50/60) are often called
cyclically in OB1. This leads to constant communication between the CPU and
CP. As a result, other types of communication such as PG functions cannot be
executed or only very slowly.
S
HMI systems access data of the CPU too often using S7 functions. This slows
down communication generally and there may be a lack of resources when
SEND/RECEIVE FCs are called cyclically in OB1.
Remedy
The recommendations below will help to avoid these situations:
S
Do not call communication blocks cyclically in OB1!
Communication should be called time-controlled in a suitable cyclic-interrupt
OB. The call interval of this OB should be significantly higher than the average
cycle time of your program.
S
You should set a minimum cycle time that is higher than the average runtime of
OB1. This frees resources for communication on the CPU. This is, for example,
a remedy for existing applications when communication already takes place
cyclically in OB1.
S
If necessary, reduce the time taken for communication processing on the CPU
by changing the parameters set for “cyclic load due to communication” in the
properties dialog of the CPU.
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4
This chapter explains the following:
S
The general aspects of configuring communication connections
S
How to configure ISO transport connections, ISO-on-TCP and TCP connections
S
How to use the connection configuration functions to specify communication
partners that exchange data via UDP
You will find a description of the connection-specific properties dialogs in the
following sections:
S
ISO transport connections see Section 4.4
S
ISO-on-TCP connections see Section 4.5
S
TCP connections see Section 4.6
S
UDP see Section 4.7
You will find further information in the following sources:
S
For the properties of the configurable connection types, refer to Section 1.5
S
There are situations in which communication connections are not set up over
the configuration interface of STEP 7 but program-controlled by certain
applications; see also Chapter 5.
S
For the properties of the configurable connection type E-mail, refer to /5/.
S
You will find information on the numbers of connections and amounts of data in
Section 3.1.
S
For information on configuring connections, refer to the online help of STEP 7
by selecting Help " Contents.
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4.1
Procedure
Initial Situation
The steps described here assume the following:
1. You have created the local S7 station and the required partner stations in your
STEP 7 projects (refer to the description in Chapter 2).
2. You have clarified the other station types with which connections must be
established. You create substitute objects for these station types in your
STEP 7 projects.
Setting up Connections and Using Them in the User Program
The following steps are necessary to operate connections on the SIMATIC S7 PLC
with the Ethernet CP:
Configuring
Programming
Create new connections.
(see Section 4.3.1)
Program the SEND/RECEIVE
interface in the user program.
(Refer to Section 3.2 and the detailed
FC description in Chapter 6).
Configure connection properties.
(see Sections 4.4 to 4.4)
Download connection configurations
and user programs to the S7 station.
Legend:
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necessary steps
optional steps
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4.2
Possible Connection Configurations
Communication connections are possible between the communication partners
shown in the diagram below.
The communication partners can be in the same project or distributed in the
subprojects of a multiproject.
Connections to communication partners outside a project are configured using the
STEP 7 object “Partner other project” or using substitute objects such as ”Other
stations” or SIMATIC S5.
S7 – 400
Ethernet CP
Ethernet CP
Ethernet /IT-CP
S7 – 300
S7 – 400
Ethernet CP
Subnet 1
Ethernet CP
WAN*
LAN *
only TCP/IP
PG/PC with Ethernet CP
SIMATIC S5
Subnet 2
S7 – 400
Ethernet CP
Other station with
Ethernet attachment
Figure 4-1
Possible Connections
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Organization in a Multiproject
If interproject subnets are configured, you can also configure connections over
such subnets using STEP 7 V5.2. The endpoints of these connections can be
located in different projects.
STEP 7 supports you both when creating interproject connections within a
multiproject as well as when synchronizing connections that were configured
without a multiproject context.
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4.3
Connections
Characteristics of a Connection
A communication connection allows program-controlled communication between
two nodes on Industrial Ethernet with the following characteristics:
S
The data transfer is bi-directional, in other words, it is possible to transmit and
receive on the connection simultaneously.
S
Both stations have the same rights, in other words, each station can trigger the
send and receive procedures in response to events.
S
The address of the communication partner is specified in the configuration.
Exceptions to this are:
– free UDP connections
Here, the address is specified at the FC interface in the user program.
– programmed communication connections (see Chapter 5)
SIMATIC S7 station
with EthernetEthernet
CP
CP
send
receive
Ethernet
node
Communication
connection
receive
send
Ethernet
node
send
receive
Figure 4-2
receive
Communication
connection
send
Sending and Receiving via one Communication Connection
Note
The term “connection” is also used here for UDP. Reason: During configuration
(just as in TCP) the communication partners are assigned to each other and
therefore logically “connected”. In actual fact, with UDP there is no explicit
connection establishment between communication partners.
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Amounts of Data
Refer to the manual /1/ supplied with the Ethernet CP for the number of
communication connections supported by the Ethernet CP. The number of
connections per station can be increased by adding more CPs.
The Ethernet CP can transfer the amounts of data shown in the table below per job
on one connection:
Table 4-1
ISO Transport
ISO-on-TCP
TCP
UDP
Sending
8192 bytes
8192 bytes
8192 bytes
2048 bytes
Receiving
8192 bytes
8192 bytes
8192 bytes
2048 bytes
Notice
The transfer of more than 240 bytes of data is supported by newer version CPs.
Please note the information in Section 6 and in the manual of the Ethernet CP.
Tasks of the Ethernet CP
When handling the data transfer on a connection, the Ethernet CP has the
following tasks:
S
When receiving
Receiving data from Ethernet and transferring it to the user data area on the
CPU.
S
When sending
Taking data from the user data area on the CPU and sending the data via
Ethernet.
The connection is established automatically as soon as the partner is obtainable.
For a free UDP connection, the following functions are also necessary in addition
to those above:
S
When receiving
Entry of the sender of the message in the job header.
S
When sending
Evaluation of the job header and addressing the partner
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Requirements for Configuring Connections
The Ethernet CP was entered in the hardware configuration and connected to the
subnet.
As a bus node, the Ethernet CP has an address.
Notice
All stations not in the STEP 7 project must be configured with substitute objects
(for example as “SIMATIC S5” or “Other stations”).
or
Use the “unspecified” partner type when you create the connection.
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4.3.1
New Connection
Principle
When you create new connections, you start from entered and networked stations.
A connection is then configured starting from a station or CPU in the current S7
project and then selecting a destination station.
Due to the networking, the node addresses (MAC or IP addresses) of the two
stations are already decided. The local/remote TSAPs (Transport Service Access
Point) or ports at both ends of the connection are automatically assigned default
values.
If the partner station is a station outside the current project or a non-S7 station, the
remote TSAPs (Transport Service Access Point) or ports must be specified in the
Properties dialog of the connection.
The endpoint of the connection to a SIMATIC S7 station is always a CPU. A
separate connection table is created for each CPU and displays the connection
partner and types of connections.
Creating a New Connection
To configure a new connection, the stations and their CPs must be configured and
networked in the S7 project. To create a new connection, follow the steps below:
In NetPro, follow the steps below:
1. In NetPro, select the station or the CPU in the station from which you want to
establish the connection.
2. Select the menu command Insert
right mouse button!)
"
New Connections (also available with the
Result: The following dialog appears on the screen.
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Figure 4-3
Layout of the “New Connection” Dialog (Example of an ISO Transport Connection)
3. Select the partner station to which you want to establish a connection (if several
CPUs exist, please select the required CPU).
4. Select the connection type you want to use (for example ISO transport
connection) in the “Type” box
When you confirm your input with Apply, the new connection is created and the
”New Connection” dialog box remains open. This allows you to create further
connections without needing to reopen the dialog box. The connection table is
updated at the same time.
When you click OK, the connection is entered in the list, the dialog is terminated
and the display in the main dialog is updated.
If you click Cancel, the dialog is terminated and the connection is not entered in
the list.
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Handling Connections in a Multiproject
Interproject connections to a specified partner (for example, a CPU) are created in
the same way as connections within a project (identical procedure). The dialog for
selecting the connection partner has been extended and allows you not only to
select the endpoint (module) but also the project within a multiproject to which the
endpoint belongs.
The consistency of interproject connections is retained when you work with the
projects of the multiproject:
S
Interproject connections within a multiproject are implicitly broken when a
project is taken out of the multiproject for distributed editing and the connection
partner is located in the removed project.
S
When the removed project is returned to the multiproject, STEP 7 automatically
merges the broken connections consistently.
Connections to Non-S7 Stations using Substitute Objects
If you want to configure connections to devices or stations that are not S7 stations,
select a station of the type “SIMATIC S5”, “PC/PG” or “Other Station” as the
destination station.
By creating these stations in NetPro and networking them, you have already
specified the node addresses (MAC or IP addresses) of the two stations. You must
specify the TSAP (Transport Service Access Point) for the destination station.
Notice
Connections to non-S7 stations (for example SIMATIC S5) are generated as
incompletely specified connections; in other words, the remote TSAP or port is
empty. These connections must be specified in the Properties dialog.
4.3.2
Connections to Partners in Other Projects
There are various ways of creating connections to partners configured in other
STEP 7 projects or with other tools outside the current STEP 7 project:
S
Connections using substitute objects such as “SIMATIC S5”, “PC/PG” ,
“SIMATIC PC Station” or “Other Station”.
This method is described in the section above.
S
Unspecified connections
S
STEP 7 object ”Partner in other project” (multiproject)
With this method, a connection is reserved in both subprojects that can be
synchronized later by the system when the partner project is included in the
multiproject.
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In both projects, the same connection name must be configured in the
properties of the connection. The connection name is used as a textual
reference when the projects are merged. Based on the connection name it is
possible to assign the connection partner and synchronize the connection
properties.
Before the projects are merged, such connections are ”unspecified
connections” in terms of addressing; in other words, the partner addresses
remain empty.
Unspecified Connections
Connections to an as yet unknown device (for example a diagnostic unit) are
configured as “unspecified” connections. They can be specified later in the
Properties dialog.
You can create an unspecified connection simply by selecting station “unspecified”
for the connection partner when you create the connection. The unspecified
connection can be used in three ways (explained below based on the example of
an ISO-on-TCP connection (ISO transport and TCP connections are analogous):
S
Declare readiness for communication – passive connection establishment
The connection establishment is then set to passive (see settings in the
General tab).
The address setting for the ISO-on-TCP connection is then as follows:
The remote IP address and the remote TSAP are empty, in other words, they
are not relevant for the CP. When the connection is established, any partner is
accepted (partner = connection name that addresses the CP with the correct IP
address and TSAP).
It is also possible to use a partial specification; in other words, communication
is permitted with any partner that matches the specified TSAP.
S
Connection to a specific station in any project
The address setting for the ISO-on-TCP connection is then as follows:
You can specify the remote IP address and the port of any destination station.
The destination station can be in the current STEP 7 project or in another
project.
Use this method if you have not created a substitute object for the partner
station, for example SIMATIC S5, in the current project.
S
V 5.2.1
IP Address Assignment over DHCP
If you select the option to obtain the IP address from a DHCP server, it is
initially not possible to create a fully specified connection in the STEP 7 project
because the local IP address is not known. You must therefore select
”unspecified” with passive connection establishment as the connection type.
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The following table lists the possible options.
Table 4-2
Meaning for Connection
Establishment
IP Address /
MAC Address
TSAP / Port
Possible Connection
Establishment
by any partner
empty
empty
passive
by any partner via specific TSAP
empty
specified
passive
specified
specified
active / passive
to or by a specific partner
The free UDP connection is another variant. With this type of connection, the
address of the connection partner is left open during configuration. The
communication nodes are identified by address information in the communication
job in the user program.
For further information, refer to the sections dealing with specific connections.
Notice
The number of connections possible per Ethernet CP can be found in the manual
/1/supplied with the CP. If several CPs are installed in one station, the next CP is
automatically selected if the limit is exceeded. The connections can be routed in
the Properties dialog of the connection.
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4.3.3
Further Functions
Toolbar
In the toolbar of the connection configuration dialog the following functions are
available:
Save
To save the configured connection, select the Save function or click the save
button.
Print
You can print the entire connection table or individual sections of it by selecting
the Print function or clicking the print button.
The following print options are available:
S Overview of all connections (complete connection table)
S Overview of the selected connections (selected area)
S Detailed printout of all connections (details of all connections)
S Detailed printout of the selected connections (details of the selected area)
Change Connection
Partners
You assign a new partner station to the selected connection.
Insert Connection
You create a new entry in the connection table.
Download
You download the connection table to the PLC. For more detailed information
call up the integrated help function.
Help
If you require help or more information, select the Help function or click the
help button.
The help button provides you with context-related help. Using the help function
you call a help dialog familiar from other Windows applications.
Important!
Remember that this also changes the partner ID on connections of the
SEND/RECEIVE interface. You may need to adapt your user program.
Print Function in the “Overview” Tab
An additional function for printing the configured connections and configuration
status is available in the “Overview” tab of the properties dialog of the connection.
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4.3.4
Connections Without Assignment
Overview
This section explains the actions that can lead to a configured connection losing its
assignment to the CP or being deleted.
Caution
Remember that in contrast to the S7 connections, the connections of the
SEND/RECEIVE interface are assigned a CP-dependent ID. The actions below
may require the ID to be modified so that the interface information in the user
program must also be adapted.
Notice
If you replace one CP with another, this must provide at least the same services
and have at least the same version. This is the only way to ensure that the
connections configured over the CP remain consistent and can be used.
Table 4-3
Actions That Can Cause Changes to Configured Connections
Action
The CP (module) is
moved to a different
location in the hardware
configuration (drag and
drop)
Consequences for the
Connections
The connections are retained.
The connection IDs are
automatically updated.
The CP (module) is
deleted in the hardware
configuration.
The connections remain without
assignment to a CP in the
connection table. In the
You receive the message “Overview” tab of the Properties
“CP has n connections;
dialog, the connections are
the assignment will be lost
identified with “!”.
in the connection table”.
How to Establish the Connection
Again
1. Adapt the module start address
LADDR in the user program.
2. Download the connection
configuration to the CP again.
Once you have placed a CP in the
hardware configuration and networked it:
1. Assign the CP in the connection
properties dialog in the “Addresses”
tab.
or
Reassign the connection using the
menu option Edit " Connection
Partner....
2. Adapt the connection ID in the user
program.
3. Download the connection
configuration to the CP again.
Deleting the SIMATIC S7
station.
All the connections to this station
are deleted within the project.
Reconfigure the station and
connections.
Note:
The does not apply to
connections to a partner that
uses a router.
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Table 4-3
Actions That Can Cause Changes to Configured Connections, continued
Action
Consequences for the
Connections
How to Establish the Connection
Again
Deleting a remote station.
The connections of the stations
in the project to remote stations
remain without assignment in
the connection table. In the
“Overview” tab of the Properties
dialog, the connections are
identified with “!”.
Reassign a remote station (or even a
local station) using the menu option Edit
" Connection Partner....
Changing the subnet
assignment of the CP.
The connections that were
assigned via the CP remain
without an assignment in the
connection table. In the
“Overview” tab of the Properties
dialog, the connections are
identified with “!”.
Note:
Reassign the connections using the
menu option Edit " Connection
Partner... or in the “Addresses” tab of
the properties dialog for the connection.
The does not apply to
connections if a router is used.
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Display (Example)
The status of connections is displayed in the “Properties ISO Transport
Connection” dialog in the “Overview” tab.
Figure 4-4
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Status of the Connections in the “Overview” Tab (Example of ISO Transport Connections)
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4.4
Configuring ISO Transport Connections
Introduction
When you create a connection in the New dialog, you specify the connection type
and, as far as possible, the connection partner.
When necessary, you can adapt other connection partners that are set as default
when you create a new connection as described below.
Opening the Dialog
To call the dialog for special connection properties, follow the steps outlined below:
1. Select the required connection in the connection table.
2. Select the menu option Edit
"
Object Properties
Result: The “Properties ISO Transport Connection” dialog appears.
Tabs
The following tabs are available for ISO transport connections:
S
General
Displays parameters that identify the connection.
S
Addresses
Displays the local and remote address information.
S
Dynamics
Displays the relevant timers and counters.
S
Options
Here, you can decide whether or not you want to use the connection for one of
the access types FETCH or WRITE.
S
Overview
This is an overview of all the configured ISO transport connections of the
selected station with their parameters and the status of the connection.
S
Status Information
This tab displays the current status information for the connection (valid at the
time the dialog is opened). This information corresponds to the NCM
Diagnostics display and is only available when the station can be reached
online.
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4.4.1
Specifying the Local Connection Endpoint
General Tab
This tab of the Properties dialog displays general connection parameters that
identify the local connection endpoint.
Figure 4-5
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Layout of the Properties Dialog for the “General” Tab (ISO Transport Connections)
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Attributes
Description
Access
ID
The entry is identical to the Local ID parameter in the connection
table.
Selectable
Name
When you create the connection, a name is proposed here for the
connection endpoint along with a connection number as suffix.
Modifiable
Local Endpoint
With unspecified connections, use this box to identify the partner.
Via CP
If the station contains more than one CP of the same type connected
to the same subnet, you can select the connection route. –> “Route”
button see Section 4.9.
Display only
If no CP is assigned (for example because the CP was previously
deleted) “none” is displayed here.
Active Connection
Establishment
With this option, you specify whether the connection is established by Modifiable
this S7 station. This is the default setting when the address of the
partner is specified.
ON: the connection is established actively.
OFF: the connection is established by the partner.
If you selected partner “unspecified” when you created the
connection, the option is deselected as default. If you activate the
option, you must also specify the address of the partner in the
“Addresses” tab.
Note:
Please note the effects on the mode. If you want to use the FETCH
or WRITE mode (refer to the ”Options” tab), the mode must be set to
”Passive” for the S7 station.
Block Parameters
ID
This value must be entered as a block call parameter ID for calling
the FC in the user program to identify the connection. The ID
changes if the local ID is changed.
Display only
LADDR
This value must be entered as a block call parameter ID for calling
the FC in the user program to identify the connection.
Display only
Connection Name (Reference) – Only in Multiproject
If you create a connection to a partner in another project that has not yet been
merged with the current multiproject, you must specify a connection name as a
reference (not to be confused with the name of the connection endpoint described
above). Interproject connections can then be joined up based on this reference. As
soon as the connections have been joined, the connection name (reference) is no
longer relevant and is no longer displayed.
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4.4.2
Specifying ISO Transport Addresses
Address Parameters
An ISO transport connection is specified by the local and remote connection
endpoint.
S
Local addresses:
Local MAC address and local TSAP
(Transport Service Access Point)
S
Remote addresses:
Remote MAC address and remote TSAP
Ethernet station A
Remote
TSAP
Local
TSAP
MAC
address A
Figure 4-6
Ethernet station B
Local
TSAP
ISO transport
connection
Remote
TSAP
MAC
address B
Sending and Receiving on One ISO Transport Connection
Notice
The TSAPs of an ISO transport connection must match as follows:
Remote TSAP (on Ethernet CP) = local TSAP (in destination station);
Local TSAP (on Ethernet CP) = remote TSAP (in destination station);
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Addresses Tab
The addresses tab displays proposed values for the relevant local and remote
address information. When connecting to non-S7 stations, you can set the TSAP
addresses individually.
Figure 4-7
Layout of the “Addresses” Tab of the Properties Dialog with Default TSAPs
TSAP Format
ISO transport connections have a TSAP length of 1 to 16 bytes. When you are
entering values, the current length is displayed automatically (visible display: 16
ASCII characters). Local and remote TSAPs can be input as hexadecimal values
or as ASCII strings. If you make your entries in ASCII, the characters you enter are
also displayed in hexadecimal format. If you make your entries in hexadecimal,
printable characters are displayed in ASCII (8 hexadecimal values are visible). If
you enter nonprintable characters, the ASCII display is gray (no further ASCII
entries possible) and the nonprintable characters are displayed as periods.
Local and Remote TSAPs
Remote and local TSAPs can be identical since the connection is uniquely
identified by the different MAC addresses. If you require more than one connection
between two stations, the TSAPs must also be different.
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Default TSAPs
When configuring the local and remote TSAPs, there is a default value “ISO-1” for
the first connection between the two partners (can be changed). For a new
connection between the two partners, the default value “ISO-2” is proposed. With a
new connection to a new partner, the value ISO-1 is used again.
Addresses Tab – Unspecified ISO transport connection
If you select the partner type as “unspecified”, depending on your task, you can
enter address information about the communication partner here. The options
available to you are explained in detail in Section 4.3.1.
The Addresses tab shown here illustrates the situation in which the MAC address
and the remote TSAP were not specified. If you do not make any further settings,
this means that you are willing to accept a connection establishment request from
any communication partner.
Figure 4-8
108
Layout of the “Addresses” Tab of the Properties Dialog for an Unspecified Connection
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4.4.3
Specifying ISO Transport Dynamic Properties
Dynamics Tab
The Dynamics tab displays the relevant timers and counters of this connection.
You can normally accept these default values.
If necessary, for example with connections to non-Simatic systems, you can set
the timers and counters individually and influence the dynamic response of the
connection.
Figure 4-9
Layout of the “Dynamics” Tab of the Properties Dialog
Attributes
Description
Access
The retransmission time specifies the interval after
which an unsuccessful connection establishment
attempt can be triggered again (1–60 s, default 5 s)
– if connection establishment is active
– if connection establishment is passive (–> irrelevant)
Modifiable
–––––
Connection Establishment
Retransmission Time
Data Transfer
Retransmission time
This parameter specifies the interval after which an
unsuccessful transmission attempt can be triggered
again (100–30000 ms, default 1000 ms).
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Attributes
Description
Access
Max. CMax. Count is the
number of attempted
transmissions including the
first (1–100, default 5).ount
Modifiable
Inactivity Time
The inactivity time specifies the interval after which the
connection is terminated if no sign of life is received
from the partner (6–180 s, default 30 s).
Modifiable
Window Time
The window time specifies the interval at which sign of
life frames are sent. For SIMATIC NET CPs, the
window time is set to 1/3 of the inactivity time (2–60 s,
default 10 s). Sign of life frames are sent to check the
connection when there is no data traffic.
Display only
Notice
Window Time and Inactivity Time
The partner responds to a sign of life frame with a frame. They are therefore sent
to the partner at the intervals of the window time. To avoid unwanted connection
termination, the inactivity time should be at least three times as long as the
window time.
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4.4.4
Checking ISO Transport Connection Properties
Overview Tab
The Overview tab displays all previously configured ISO transport connections and
their parameters for this station (information only).
For an example of this display, refer to Section 4.3.4.
Description
Parameter
Local ID
S7 Station: This is the connection ID of the ISO transport connection;
PC Station: Identification number for the connection.
Name
Name entered for the connection endpoint.
CPU / Applications
If you display all the ISO transport connections being operated in this station
in the multiprocessor mode (with PC stations: multiple applications), the
CPU/application that is the endpoint of the particular connection is specified
here.
R/S or via CP
With S7-CPs: Rack/slot of the local CP via which the connection is
established.
With PC stations: Display of the CP over which the connection is
maintained.
Remote
address
Specifies the remote MAC address of the connection on the Ethernet
subnet.
Local TSAP
Transport Service Access Point for the local connection endpoint.
Partner TSAP
Transport Service Access Point for the remote connection endpoint.
Mode
Displays the mode configured in the ”Options” tab.
Status
Indicates the current configuration of the connection.
“Connections without assignment” are indicated by “No local CP/No remote
CP” in the status column and a “!” character at the end of the“Local ID” (for
example: 0002 A000!).
Connections you are currently editing are also indicated by “!” at the end of
the local ID.
You can set the column widths in the “Overview” tab individually.
Connection Overview with Multiple CPUs in an S7 Station
If you operate more than one CPU in your S7 station, you can click the button to
extend the overview to the connections on all CPUs.
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4.5
Configuring ISO-on-TCP Connections Properties
Introduction
When you create a connection in the New dialog, you specify the connection type
and, as far as possible, the connection partner.
When necessary, you can adapt other connection partners that are set as default
when you create a new connection as described below.
Opening the Dialog
To call the dialog for special connection properties, follow the steps outlined below:
1. Select the required connection in the connection table.
2. Select the menu option Edit
"
Object Properties
Result: The “Properties ISO-on-TCP Connection” dialog appears.
Tabs
The following tabs are available for ISO-on-TCP connections:
112
S
General
Displays parameters that identify the connection.
S
Addresses
Displays the local and remote address information.
S
Options
Here, you can decide whether or not you want to use the connection for one of
the access types FETCH or WRITE.
S
Overview
This is an overview of all the configured ISO-on-TCP connections of the
selected S7 station with their parameters and the status of the connection.
S
Status Information
This tab displays the current status information for the connection (valid at the
time the dialog is opened). This information corresponds to that displayed by
NCM diagnostics.
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4.5.1
Specifying the Local Connection Endpoint
General Tab
This tab of the Properties dialog displays general connection parameters that
identify the local connection endpoint.
Figure 4-10
Layout of the “General” Tab in the Properties Dialog for ISO-on-TCP Connections
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Parameter
Description
Access
ID
The entry is identical to the Local ID parameter in the
connection table.
Selectable
Name
When you create the connection, a name is proposed here
along with a connection number as suffix.
Modifiable
Local Endpoint
With unspecified connections, use this box to identify the
partner.
Via CP
If the station contains more than one CP of the same type
connected to the same subnet, you can select the connection
route. –> “Route” button see Section 4.9.
Display only
If no CP is assigned (for example because the CP has been
deleted) “none” is displayed here.
Active Connection
Establishment
With this option, you specify whether the connection is
established by this S7 station. This is the default setting when
the address of the partner is specified.
Modifiable
ON: the connection is established actively.
OFF: the connection is established by the partner.
If you selected partner “unspecified” when you created the
connection, the option is deselected as default. If you activate
the option, you must also specify the address of the partner in
the “Addresses” tab.
Note:
Please note the effects on the mode. If you want to use the
FETCH or WRITE mode (refer to the ”Options” tab), the mode
must be set to ”Passive” for the S7 station.
Block Parameters
ID
This value must be entered as a block call parameter ID for
calling the FC in the user program to identify the connection.
The ID changes if the local ID is changed.
Display only
LADDR
This value must be entered as a block call parameter ID for
calling the FC in the user program to identify the connection.
Display only
Connection Name (Reference) – Only in Multiproject
If you create a connection to a partner in another project, that has not yet been
merged with the current multiproject, you must enter a connection name as
reference. Interproject connections can then be joined up based on this reference.
As soon as the connections have been brought together, the connection name
(reference) can no longer be entered.
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4.5.2
Specifying ISO-on-TCP Addresses
Address Parameters
A connection is specified by the local and remote connection endpoint.
S
Local addresses:
Local IP address and local TSAP
(Transport Service Access Point)
S
Remote addresses:
Remote IP address and remote TSAP
Ethernet station A
Remote
TSAP
Local
TSAP
Ethernet station B
ISO-on-TCP
connection
MAC
address A
Figure 4-11
Local
TSAP
Remote
TSAP
IP
address B
Sending and Receiving on One ISO-on-TCP Connection
The address parameters are configured with NCM S7 and saved in the CP
database. Modifications and extensions to the Industrial Ethernet network topology
do not therefore have any effect on the CPU user program.
Notice
When you configure the Ethernet CP and the Ethernet destination station, the
TSAPs of an ISO-on-TCP connection must cross match:
Remote TSAP (in Ethernet CP) = local TSAP (in destination station)
Local TSAP (in Ethernet CP) = remote TSAP (in destination station)
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Addresses Tab
The addresses tab displays proposed values for the relevant local and remote
address information. If necessary, you can set the TSAP addresses individually.
Figure 4-12
Layout of the “Addresses” Tab of the Properties Dialog with Default TSAPs for ISO-on-TCP
Connections
TSAP Format
ISO-on-TCP connections have a TSAP length of 1 to 16 bytes. When you are
entering values, the current length is displayed automatically (visible display: 16
ASCII characters). Local and remote TSAPs can be input as hexadecimal values
or as ASCII strings. If you make your entries in ASCII, the characters you enter are
also displayed in hexadecimal format. If you make your entries in hexadecimal,
printable characters are displayed in ASCII (8 hexadecimal values are visible). If
you enter nonprintable characters, the ASCII display is gray (no further ASCII
entries possible) and the nonprintable characters are displayed as periods.
Local and Remote TSAPs
Remote and local TSAPs can be identical since the connection is uniquely
identified by the different MAC addresses. If you require more than one connection
between two stations, the TSAPs must also be different.
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Default TSAPs
When configuring the local and remote TSAPs, there is a default value “TCP-1” for
the first connection between the two partners (can be changed). For a new
connection between the two partners, the default value “TCP-2” is proposed. With
a new connection to a new partner, the value TCP-1 is used again.
Addresses Tab – Unspecified ISO-on-TCP Connection
If you select the partner type as “unspecified”, depending on your task, you can
enter address information about the communication partner here. The options
available to you are explained in detail in Section 4.3.1.
The Addresses tab shown here illustrates the situation in which the remote IP
address and the remote TSAP were not specified. If you make no further entries,
you are accepting connection establishment from any communication partner.
Figure 4-13
Layout of the “Addresses” Tab of the Properties Dialog for an Unspecified Connection
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4.5.3
Checking ISO-on-TCP Connection Properties
Overview Tab
The overview shows all the configured ISO-on-TCP connections and their
parameters (cannot be modified here).
You can adjust the width of the columns in the table.
For an example of this display, refer to Section 4.3.4 (the ISO transport
connection).
Parameter
Description
Local ID
This is the connection ID of the ISO-on-TCP connection (STEP 7 connection
configuration; DWORD)
Name (loc.
endpoint)
Entered connection name. This identifies the ISO-on-TCP connection.
CPU /
Applications
If you display all the ISO transport connections being operated in this station in the
multiprocessor mode (with PC stations: multiple applications), the CPU/application that
is the endpoint of the particular connection is specified here.
With S7-CPs: Rack/slot of the local CP via which the connection is established.
R/S or via CP
With PC stations: Display of the CP over which the connection is maintained.
Specifies the remote IP address of the connection.
Partner
address
Local TSAP
Local Transport Service Access Point (8 characters default)
Remote TSAP
Remote transport service access point (8 characters default).
Mode
Displays the mode configured in the ”Options” tab.
Status
Indicates the current configuration of the connection.
“Connections without assignment” are indicated by “No local CP/No remote CP” in the
status column and a “!” character at the end of the“Local ID” (for example: 0002 A000!).
Connections you are currently editing are also indicated by “!” at the end of the local ID.
Connection Overview with Multiple CPUs in an S7 Station
If you operate more than one CPU in your S7 station, you can click the button to
extend the overview to the connections on all CPUs.
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4.6
Configuring TCP Connection Properties
Introduction
When you create a connection in the New dialog, you specify the connection type
and, as far as possible, the connection partner.
When necessary, you can adapt other connection partners that are set as default
when you create a new connection as described below.
Opening the Dialog
To call the dialog for special connection properties, follow the steps outlined below:
1. Select the required connection in the connection table.
2. Select the menu option Edit
"
Object Properties
Result: The “Properties – TCP Connection” dialog appears.
Tabs
The following tabs are available for TCP connections:
S
General
Displays parameters that identify the connection.
S
Addresses
Displays the local and remote address information.
S
Options
Here, you can decide whether or not you want to use the connection for one of
the access types FETCH or WRITE.
S
Overview
This is an overview of all the configured TCP connections of the selected S7
station with their parameters and the status of the connection.
S
Status Information
This tab displays the current status information for the connection (valid at the
time the dialog is opened). This information corresponds to that displayed by
NCM diagnostics.
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4.6.1
Specifying the Local Connection Endpoint
General Tab
This tab of the Properties dialog displays general connection parameters that
identify the local connection endpoint.
Figure 4-14
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Layout of the “General” Tab in the Properties Dialog for TCP Connections
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Attributes
Description
Access
ID
The entry is identical to the Local ID parameter in the
connection table.
Selectable
Name
When you create the connection, a name is proposed here
along with a connection number as suffix.
Modifiable
Local Endpoint
With unspecified connections, use this box to identify the
partner.
Via CP
If the station contains more than one CP of the same type
connected to the same subnet, you can select the connection
route –> “Route”, see Section 4.9.
Display only
If no CP is assigned (for example because the CP has been
deleted) “none” is displayed here.
Active Connection
Establishment
With this option, you specify whether the connection is
established by this S7 station. This is the default setting when
the address of the partner is specified.
Modifiable
If you selected partner “unspecified” when you created the
connection, the option is deselected as default. If you activate
the option, you must also specify the address of the partner in
the “Addresses” tab.
ON: the connection is established actively.
OFF: the connection is established by the partner.
Use for FTP protocol
Selecting the option has the following effects:
Modifiable
S The TCP connection is now used as an FTP connection.
S ”Addresses” tab: The addresses are specified automatically
(Port=21)
S ”Options” tab: The mode is set permanently to FTP.
S The ”Active connection establishment” option is irrelevant
and cannot be set.
Configuration limits: see /1/
Precondition: The option can only be selected for an
unspecified TCP connection.
Block Parameters
ID
This value must be entered as a block call parameter ID for
calling the FC in the user program to identify the connection.
The ID changes if the local ID is changed.
Display only
LADDR
This value must be entered as a block call parameter ID for
calling the FC in the user program to identify the connection.
Display only
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Connection Name (Reference) – Only in Multiproject
If you create a connection to a partner in another project, that has not yet been
merged with the current multiproject, you must enter a connection name as
reference. Interproject connections can then be joined up based on this reference.
As soon as the connections have been brought together, the connection name
(reference) can no longer be entered.
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4.6.2
Specifying TCP Addresses
Address Parameters and Connection Types
With TCP, the communication partners are addressed by the local and remote
endpoints as follows:
S
Local addresses:
Local IP address and local port
S
Remote addresses:
Remote IP address and remote port
Ethernet station A
remote
port
local
port
Ethernet station B
MAC
address A
Figure 4-15
local
port
TCP
connection
remote
port
IP
address B
Sending and Receiving on One TCP Connection
Depending on the required connection type, the remote address parameters are
either specified or left open during configuration.
S
Specified TCP connection
You specified a destination station when you created the connection.
S
Unspecified TCP connection
You entered “unspecified” for the connection partner when you created the
connection.
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Addresses Tab – Specified TCP Connection
The addresses tab displays proposed values for the relevant local and remote
address information. You can change the port settings individually.
Figure 4-16
Layout of the Properties Dialog in the “Addresses” tab with DEFAULT Ports for TCP
Connections
Ports
The ports or port addresses define the access point to the user program within the
station / CPU. They must be unique within the station / CPU!
The following table shows the range of values:
Table 4-4
Port Addresses
Application / Note
Fixed, must not be used!
0
Assigned as default, should not be used (well-known ports)
Range used by NCM in which a free port address is
searched for and assigned.
1 to 1024
from 2000 to 5000
You can set any port address within this range.
Port addresses higher than 5000 are used by the system!
from 5000...65535
Note:
If you want to use these port addresses, please contact
your system administrator.
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Addresses Tab – Unspecified TCP Connection
If you select the partner type as “unspecified”, depending on your task, you can
enter address information about the communication partner here. The options
available to you are explained in detail in Section 4.3.1.
The Addresses tab shown here illustrates the situation in which the remote port but
not the IP address was specified. If you make no further entries, you are accepting
connection establishment with any communication partner that uses the specified
port.
Figure 4-17
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4.6.3
Checking TCP Connection Properties
Overview Tab
The overview shows all the previously configured TCP connections and their
parameters (cannot be modified here).
You can adjust the width of the columns in the table.
For an example of this display, refer to Section 4.3.4 (the ISO transport
connection).
Parameter
Description
ID
This is the connection ID of the TCP connection (STEP 7 connection
configuration; DWORD).
Name (loc. endpoint)
Entered connection name. It identifies the TCP connection (8
character double width).
CPU / Applications
If you display all the ISO transport connections being operated in this
station in the multiprocessor mode (with PC stations: multiple
applications), the CPU/application that is the endpoint of the
particular connection is specified here.
R/S or via CP
With S7-CPs: Rack/slot of the local CP via which the connection is
established.
With PC stations: Display of the CP over which the connection is
maintained.
Partner address
Specifies the remote IP address of the connection.
Local port
Local port (8 characters default length)
Remote port
Remote port (8 characters default width)
Mode
Displays the mode configured in the ”Options” tab.
Status
Indicates the current configuration of the connection.
“Connections without assignment” are indicated by “No local CP/No
remote CP” in the status column and a “!” character at the end of
the“Local ID” (for example: 0002 A000!).
Connections you are currently editing are also indicated by “!” at the
end of the local ID.
Connection Overview with Multiple CPUs in an S7 Station
If you operate more than one CPU in your S7 station, you can click the button to
extend the overview to the connections on all CPUs.
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4.7
Configuring UDP Connection Properties
Introduction
When you create a connection in the New dialog, you specify the connection type
and, as far as possible, the connection partner.
When necessary, you can adapt other connection partners that are set as default
when you create a new connection as described below.
Opening the Dialog
To call the dialog for special connection properties, follow the steps outlined below:
1. Select the required connection in the connection table.
2. Select the menu option Edit
"
Object Properties
Result The “Properties – UDP Connections“ dialog appears.
Tabs
The following tabs are available for UDP connections:
S
General
Displays parameters that identify the connection.
S
Addresses
Displays the local and remote address information.
S
Overview
Overview of all configured UDP connections of the selected S7 station with
corresponding parameters and the status of the connection.
S
Status Information
This tab displays the current status information for the connection (valid at the
time the dialog is opened). This information corresponds to that displayed by
NCM diagnostics.
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4.7.1
Specifying the Local Connection Endpoint
General Tab
This tab of the Properties dialog displays general connection parameters that
identify the local connection endpoint.
Figure 4-18
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Layout of the “General” Tab in the Properties Dialog for UDP Connections
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Attributes
Description
Access
ID
The entry is identical to the Local ID parameter in the
connection table.
Selectable
Name
When you create the connection, a name is proposed here
along with a connection number as suffix.
Modifiable
Local Endpoint
With unspecified connections, use this box to identify the
partner.
Via CP
If the station contains more than one CP of the same type
connected to the same subnet, you can select the connection
route –> “Route”, see Section 4.9.
Display only
If no CP is assigned (for example because the CP has been
deleted) “none” is displayed here.
Block Parameters
ID
This value must be entered as a block call parameter ID for
calling the FC in the user program to identify the connection.
The ID changes if the local ID is changed.
Display only
LADDR
This value must be entered as a block call parameter ID for
calling the FC in the user program to identify the connection.
Display only
Connection Name (Reference) – Only in Multiproject
If you create a connection to a partner in another project, that has not yet been
merged with the current multiproject, you must enter a connection name as
reference. Interproject connections can then be joined up based on this reference.
As soon as the connections have been brought together, the connection name
(reference) can no longer be entered.
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4.7.2
Specifying UDP Addresses
Address Parameters and Connection Types
With UDP, the communication partners are addressed using the local and remote
endpoint, as follows.
S
Local addresses:
Local IP address and local port
S
Remote addresses:
Remote IP address and remote port
Note
The term “connection” is also used here for UDP. Reason:
During configuration (just as in TCP) the communication partners are assigned to
each other and therefore logically “connected”. In actual fact, with UDP there is no
explicit connection establishment between communication partners.
Ethernet station A
remote
port
local
port
Ethernet station B
MAC
address A
Figure 4-19
local
port
UDP
connection
remote
port
IP
address B
Sending and Receiving on One UDP Connection
Depending on the required connection type, the remote address parameters are
either specified or left open during configuration.
S
Specified UDP connection
You specified a destination station when you created the connection.
Configuring broadcast or multicast provides you with a further option (see
Section 4.7.3 below).
S
Unspecified UDP connection
You entered “unspecified” for the connection partner when you created the
connection.
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Addresses Tab – Specified UDP Connections
The addresses tab displays proposed values for the relevant local and remote
address information. You can make the settings for the ports individually.
Figure 4-20
Layout of the Properties Dialog in the “Addresses” tab with DEFAULT Ports for UDP
Connections
Ports
The ports or port addresses define the access point to the user program within the
station / CPU. They must be unique within the station / CPU!
The following table shows the range of values:
Table 4-5
Application / Note
Fixed, must not be used!
Assigned as default, should not be used (well-known ports)
Range used by NCM in which a free port address is
searched for and assigned.
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Port Addresses
0
1 to 1024
2000... onwards
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Addresses Tab – Unspecified UDP Connection
An unspecified UDP connection can be used in two ways:
S
Free UDP Connection
To configure a free UDP connection, select the “Address assignment in block”
check box. The input boxes for the remote IP address and the remote port are
then deactivated since the destination addresses are now specified by the user
program.
S
Connection to a remote station in a different project
You can specify the remote IP address and the port for any destination station.
The destination station can be in the current STEP 7 project or in another
project.
Please note:
Since no connection is actually established with UDP (datagram service),
communication on the configured UDP connection is only possible when the
partner addresses (IP address and port ) are specified.
Figure 4-21
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Layout of the Properties Dialog in the “Addresses” Tab for the “Free UDP Connection” Mode
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4.7.3
UDP with Broadcast and Multicast
Application
When you select the connection partner, you have the following two extra options
on UDP connections:
S
Connection to all Broadcast Nodes
If you select the “all broadcast nodes”, you specify that UDP frames are sent to
all obtainable broadcast nodes.
Notice
When using broadcast, you can only send with S7-CPs; reception is not possible
(see below)!
S
Connection to all Multicast Nodes
If you select “all multicast nodes” as the partner, you specify that UDP frames
are sent to all nodes of a multicast group and that multicast frames can be
received.
Multicast is a special, configurable connection option that is supported by
Industrial Ethernet CPs only on UDP connections.
The frames are sent without acknowledgment because the UDP protocol has no
provision for acknowledgments. This is designed to avoid floods of data resulting
from the acknowledgments. If, for example, frames are sent to 100 partners, 100
acknowledgments (1 per partner) will arrive at the same time. The sending module
would not be able to evaluate such a flurry of data.
When to Use Multicast instead of Broadcast?
To allow the simultaneous transmission of a frame to a number of partners, the
connection option Multicast for UDP connections was introduced.
In contrast to the broadcast connection option, it is also possible to receive frames
sent to several nodes in the multicast circle on this connection type.
By specifying a particular group of recipients (multicast circle), load on recipients
for which the message is not intended is prevented. Multicast therefore represents
a better solution than broadcast when frames are sent to groups of partner
stations.
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Why Does an S7-CP Prevent Reception on Broadcast Connections?
It is often necessary for one station to send frames to a number of partner stations.
It is important that the frames are sent at the same time and arrive and practically
the same time. Sending and receiving broadcast frames is always required. A
broadcast message is received by all nodes in the network.
A typical application is the sending of broadcast frames to find a MAC address for
an IP address (ARP request).
For this reason, a communications module must accept broadcast frames and
evaluate them in its software. The major disadvantage of this is that network
performance sinks significantly if there are too many broadcast frames because
each individual module needs to process all the broadcast frames to find out
whether the frames were intended for it.
To avoid these disadvantages, S7-CPs handle broadcast as follows:
134
S
Following reception, the broadcast frames are filtered out with high priority by all
Ethernet CPs. This means that frames that cannot be interpreted are discarded
immediately. Only frames that can be interpreted, for example an ARP request,
are passed on over the LAN controller and evaluated. This prevents a negative
influence on the other connections by broadcast frames.
S
For the application, this means that the S7-CP cannot receive broadcast frames
intended for the transfer of user data. It is, however, possible for the module to
send broadcast frames within the network.
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Addresses Tab – Connection to all Broadcast Nodes
If you select “all broadcast nodes” as the connection partner, you specify that UDP
frames are sent to all obtainable broadcast nodes.
In the “Addresses” tab, a valid broadcast address in the network is proposed for
the partner under the IP address (IP).
You must enter a PORT address suitable for all partners you want to reach under
PORT.
Figure 4-22
Layout of the Properties Dialog “Addresses” Tab for the “Broadcast” Mode
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Addresses Tab – Connection to all Multicast Nodes
By selecting “all multicast nodes” as the connection partner, you specify that
S
sent UDP frames are delivered to all multicast nodes of the multicast group;
S
the local device receives multicast frames in the specified multicast group.
In the “Addresses” tab, a valid multicast address in the network is proposed for the
partner under the IP address (IP). When using multicast, the partner is always a
group of receivers (multicast group).
You must enter a PORT address suitable for all partners you want to reach under
PORT.
Figure 4-23
IP addresses from 224.0.0.0 to 239.255.255.255 can be used for IP multicast.
Since the IP addresses up to 224.0.0.255 are reserved for special purposes, we
recommend that you use IP addresses starting at 224.0.1.0 (default) for IP
multicast.
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4.7.4
Checking the Properties of a UDP Connection
Overview Tab
At the overview level, all the configured UDP connections and their parameters in
this station are displayed (cannot be modified).
You can adjust the width of the columns in the table.
For an example of this display, refer to Section 4.3.4 (the ISO transport
connection).
Parameter
Description
Local ID
This is the connection ID of the UDP connection (STEP 7 connection
configuration; DWORD).
Name (loc. endpoint)
Entered connection name. This identifies the UDP connection (8
characters default length).
CPU / Applications
If you display all the ISO transport connections being operated in this
station in the multiprocessor mode (with PC stations: multiple
applications), the CPU/application that is the endpoint of the
particular connection is specified here.
R/S
Rack/slot of the local CP via which the connection is established.
Partner address
Specifies the remote IP address of the connection.
Local port
Local port (8 characters default length)
Remote port
Remote port (8 characters default width)
Status
Indicates the current configuration of the connection.
“Connections without assignment” are indicated by “No local CP/No
remote CP” in the status column and a “!” character at the end of
the“Local ID” (for example: 0002 A000!).
Connections you are currently editing are also indicated by “!” at the
end of the local ID.
Connection Overview with Multiple CPUs in an S7 Station
If you operate more than one CPU in your S7 station, you can click the button to
extend the overview to the connections on all CPUs.
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4.7.5
Free UDP Connection
Program-Controlled Addressing
A free UDP connection allows program-controlled addressing of the
communication partner. Communication between two nodes on Industrial Ethernet
has the following properties:
S
Data transfer is bi-directional; in other words it is possible to send and receive
on the UDP connection at the same time.
S
The local node is specified in the configuration. The remote node is entered in
the job header of the job buffer by the user program when it calls AG_SEND.
This allows any node on Ethernet/LAN/WAN to be reached.
S
The IP address and the port of the sender can be read from the job header of
AG_RECV.
Ethernet
node
(unspecified)
SIMATIC S7 station
with Ethernet CP
User data area
Job buffer
Job header
send
receive
receive
unspecified
UDP connection
send
Job
header
User
data
User data
Figure 4-24
Sending and Receiving on an Unspecified UDP Connection with Programmed Addressing
Amounts of Data
Refer to the manual /1/ supplied with the Ethernet CP for the number of UDP
connections supported by the Ethernet CP. The number of connections per station
can be increased by adding more CPs.
Up to 2042 bytes of user data can be transferred per job buffer. The job header
uses an additional 6 bytes.
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4.8
FETCH/WRITE Mode
FETCH/WRITE
The FETCH/WRITE services allow direct access to the system memory areas on
the SIMATIC S7 CPU from SIMATIC S5, SIMATIC PC stations, or from devices of
other ranges.
S
FETCH: Read data directly
S
WRITE: Write data directly
Connection Types
The FETCH/WRITE services can be configured and used in SIMATIC S7 on the
following connection types:
S
ISO transport connections
S
ISO-on-TCP connections
S
TCP connections
Configuration
Depending on the station type, the following modes can be configured for the
connection endpoint:
S
SIMATIC S7 Station: FETCH PASSIVE / WRITE PASSIVE
If you select the FETCH PASSIVE or WRITE PASSIVE mode for the ISO
transport connection, you can access the system areas on a SIMATIC S7 PLC
from a SIMATIC S5 station or other non-S7 station (unspecified connection).
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Figure 4-25
Configuring FETCH PASSIVE Based on the Example of an ISO Transport Connection
The connection can then only be used for this mode; sending or receiving with
the FCs AG_SEND/AG_LSEND or AG_RECV/AG_LRECV is then no longer
possible.
The connection is established passively; in other words, only the partner station
(SIMATIC S5 station, a PC station, or a non-SIMATIC station) can establish the
connection. The setting is made automatically in the “General” tab and cannot
be changed.
Notice
Remember that with this configuration on an S7-300, one connection resource
(free connection for S7 functions) of the S7-300 CPU is used. CPU connection
resources are also used, for example, by S7-300 CPs, in the FMS mode or by
PGs and OPs. For more detailed information about the maximum connection
resources, refer to /13/ and /7/.
S
SIMATIC PC Station: FETCH ACTIVE / WRITE ACTIVE
If you select the FETCH ACTIVE or WRITE ACTIVE mode for the ISO
transport connection, you can access the system areas on a SIMATIC S7 PLC
or a SIMATIC S5 station from the PC station.
The connection establishment is active; in other words, the partner station must
wait for connection establishment (passive connection establishment on the
partner).
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“S7 Addressing Mode” Option
When you configure the FETCH ACTIVE / WRITE ACTIVE modes, you can select
the addressing mode. This specifies how the addresses will be interpreted in the
FETCH/WRITE call in the SIMATIC S7 station:
S
S7 addressing mode: byte address
S
S5 addressing mode: word address
This makes it possible for applications to access S5 or S7 stations without needing
to adapt the addresses. This is particularly interesting for existing S5 applications
than can be used unchanged to access S7 stations.
As default, the addressing mode for access to SIMATIC S7 is set (option selected).
System Memory
You can access the following address areas in the system memory on the
SIMATIC S7 PLC using FETCH or WRITE:
S
Data blocks (DB)
(When accessing DBs, remember that the highest DB number is 255.)
S
Bit memory (M, MB, MW, MD)
S
Process image input table (I, IB, IW, ID)
S
Process image output table (Q, QB, QW, QD)
S
I/O area inputs (PIW, PID, PIB)
S
I/O area outputs (PQW, PQD, PQB)
S
Counters (C)
S
Timers (T)
Links to Other Systems
The FETCH and WRITE modes supported on ISO transport connections and
ISO-on-TCP or TCP connections can be used with any other device to access the
S7 system memory areas.
To be able to use this type of access, for example for PC applications, you need to
know the PDU structure of the jobs. The required S7 or S5 headers for request
and response frames are 16 bytes long and their structure is described in the
Appendix.
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Messages in the Diagnostic Buffer
As a result of FETCH/WRITE access, negative acknowledgments from the S7
CPU are possible. This then leads to corresponding connection-oriented entries in
the diagnostic buffer that you can read out with NCM Diagnostics (see Section
7.5).
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4.9
Routing to Distribute Load
Routing to Distribute Load
If more than one CP of the same type exists in a station and is connected to the
same subnet, the route can be selected.
Click the “Route” button in the “General” tab to display the route dialog:
If you have configured a load distribution on two or more Ethernet CPs at the local
or remote end, you can assign the connection to the required route via the CP.
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Parameter
Description
Via CP / Local If more than one Ethernet CP exists in the station via which connections operated you
can select route here.
The CPs are only displayed for selection if they are networked.
If no CP is assigned (for example because the CP was deleted previously) “(None)” is
displayed here.
If there is only one CP plugged into the station, no selection is possible.
Via CP /
Partner
(remote)
Depending on the local selection, the possible remote CPs are displayed. All the CPs
connected to the same subnet (networked) and the local CP can be selected.
Alternatives are only available when a connection is established to a remote station
configured in the same project and the remote station has two or more CPs.
If there is no CP assigned on the partner (for example because the CP was deleted
previously) “None” is displayed here.
If there is only one CP in the remote station, no selection is possible.
If the partner is an “other station” or SIMATIC S5 PLC, one or more attachments are
displayed for selection depending on the configuration and networking of the station.
-
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Programmed Communication Connections
V 5.2.1
5
In some situations, it is an advantage to set up communication connections not
over the configuration interface of STEP 7 but program-controlled by a specific
application.
Typical users who will find this useful are, for example, mass producers of
machines who want to offer their customers a simple user interface but need to
adapt the communication services to the operator input. The end user should not
need knowledge of STEP 7.
As of STEP 7 V5.2 SP1, a function block is available for these applications that
allows flexible transfer of data blocks with configuration data to an Ethernet CP.
You will find further information in the following sources:
S
For the properties of the configurable connection types, refer to Section 4.
S
For the properties of the configurable connection types E-mail connection and
FTP connection, refer to /5/.
S
After installing STEP 7 and the NCM S7 for Industrial Ethernet option, you will
find a programmed example in the ”Sample projects” tab of the
SIMATIC Manager. This example is described in the appendix.
S
You will find information on the numbers of connections and amounts of data in
Section 3.1.
Notice
Please remember that the functions described here depend on the characteristics
of the CP type you are using /1/ .
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5.1
Overview
Area of Application
Communication connections can be freely configured controlled by the program.
Interplay between Programming and Configuration
Connections are either configured using STEP 7 or configured by the user program
while the S7 station is running. Mixing these variants on a CP is not possible!
Principle
Configuration data for communication connections can be transferred to the CPU
using the function block called in the user program.
Configuration data block
FB55 CP_CONFIG
System data for CP
Connection 1
Connection 2
Configuration data
transferred to the CP
Connection n *)
*) nmax = 64
The configuration DB can be loaded on the CP at any time. The previously valid
connections are then overwritten.
Based on the configuration data, the Ethernet CP recognizes that the
communication connections must be set up by the user program.
As soon as the user program transfers the connection data via FB55 IP_CONFIG,
the CPU switches the CP briefly to STOP. The CP receives the system data
(including the IP address) and the new connection data and processes them during
startup (RUN).
Configuration Limits
A maximum of 64 connections can be specified in FB55 CP_CONFIG. The most
important factor, however, is the maximum number of connections supported by
the CP type you are using (see /1/).
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Special Features / Restrictions
S
Consistency check only with STEP 7
The connection configuration in STEP 7 involves consistency checks that are
not possible or only possible with restrictions when using the programmed
configuration!
S
Connection configuration required on the partner
When configuring specified connections in STEP 7, you implicitly create the
connection for the partner; with a programmed configuration, this is not
possible! In this case, you must configure suitable connections for the partner.
S
DHCP / DNS is supported
IP address assignment is also possible using DHCP/DNS even if you choose
programmed configuration.
S
No ISO transport connections
The configuration of ISO transport connections over the program interface is
not supported.
S
No connection information when uploading
When you upload the S7 station data in STEP 7, this does not contain the data
of the programmed configuration.
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5.2
Procedure
Initial Situation
The steps described here assume the following:
1. You have created the local S7 station and the required partner stations in your
STEP 7 projects (refer to the description in Chapter 2).
2. You have clarified the other station types with which connections must be
established. You create substitute objects for these station types in your
STEP 7 projects.
Setting up Connections and Using Them in the User Program
Follow the steps outlined below to set up connections on the SIMATIC S7 PLC
using the user program:
Configuring
Programming
Set the CP Properties in
the “IP Configuration” tab:
Select the “Set IP
address in user program”
option.
Create system data and
connections in the configuration
DB
Program the
SEND/RECEIVE interface in
the user program.
(Refer to Section 3.2 and the
detailed FC description in
Chapter 6).
Specify the connection
characteristics in the
Configuration DB.
Program FB interface in the
user program.
Download configurations and user
programs to the S7 station.
Legend:
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necessary steps
optional steps
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5.3
Configuration Data Block
Meaning
The configuration data block (CONF_DB) contains all the connection data for an
Ethernet CP. The configuration data block is transferred to the CP with function
block FB55.
Block and Data Structure
The graphic below shows the following:
S
Structure resulting from parameter fields and subfields
– The connections and specific system data are is described by an identically
structured parameter field.
– Individual parameters are characterized by subfields.
S
Offset range
The CONF_DB can start at any point within a data block as specified by an
offset range.
Configuration data
block
Offset range 0..n
CONF_DB
Parameter field for system data (CP
networking) and connections
DB identifier
System data for CP
Type
ID (for system data = 0)
Connection 1
Number of subfields
Subfield
Subfield 1
Connection 2
Subfield 2
Individual
parameters
Connection n *)
Subfield n
Parameter fields are
described below in
Sections 5.4 and 5.5
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Subfield types are
described below in
Section 5.6
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5.4
Parameter Field for System Data
(CP Networking)
Meaning
Below, you can see the subfields that are relevant for networking the CP. These
must be specified in the parameter field for system data.
Some applications do not require all the subfield types – refer to the table for
details.
Structure
Type = 0
ID = 0
Number of subfields = n
Subfield 1
Subfield 2
Subfield n
Usable Subfields
Table 5-1
Parameter
Subfield
ID
Type *)
Special Features / Notes
(Please refer also to the general
description in Table 5-7 Page 159)
Use
( mandatory
/ optional)
1
SUB_IP_V4
Local IP address
m
2
SUB_NETMASK
–
m
8
SUB_DEF_ROUTER
–
m
4
SUB_DNS_SERV_ADDR
This subfield can occur from 0 to 4 times.
The first entry is the primary DNS server.
o
14
SUB_DHCP_ENABLE
0: No DHCP
o
1: DHCP
15
SUB_CLIENT_ID
–
o
*) The general properties of the subfield types are described below in Section 5.6.
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Example
Address
Name
Type
Initial Value
Comment
0.0
STRUCT
+0.0
DB_TYP
WORD
+2.0
FIELD_1
STRUCT
+0.0
Type
INT
0
Type of data to be transferred 0 ... 5
+2.0
ID
INT
0
Connection ID (with system parameters 0)
+4.0
Subfield_Cnt
INT
3
Number of subfields belonging to this field
+6.0
Sub_field_1
STRUCT
+0.0
Sub_field_ID
INT
1
// Number of the subfield
+2.0
Sub_field_len
INT
8
// Length of the subfield in bytes
+4.0
STAT9
STRUCT
+0.0
STAT10
BYTE
B#16#C0
+1.0
STAT11
BYTE
B#16#6F
+2.0
STAT12
BYTE
B#16#DE
+3.0
STAT13
BYTE
B#16#6A
=4.0
END_
STRUCT
=8.0
END_
STRUCT
+14.0
Sub_field_2
STRUCT
+0.0
Sub_field_ID
INT
2
// Number of the subfield
+2.0
Sub_field_len
INT
8
// Length of the subfield in bytes
+4.0
Parameter
STRUCT
+0.0
Value_1
BYTE
B#16#FF
+1.0
Value_2
BYTE
B#16#FF
+2.0
Value_3
BYTE
B#16#FF
+3.0
Value_4
BYTE
B#16#0
=4.0
END_
STRUCT
=8.0
END_
STRUCT
+22.0
Sub_field_3
STRUCT
+0.0
Sub_field_ID
INT
8
// Number of the subfield
+2.0
Sub_field_len
INT
8
// Length of the subfield in bytes
+4.0
STAT9
STRUCT
+0.0
STAT10
BYTE
B#16#C0
+1.0
STAT11
BYTE
B#16#6F
+2.0
STAT12
BYTE
B#16#DE
+3.0
STAT13
BYTE
B#16#6A
=4.0
END_
STRUCT
=8.0
END_
STRUCT
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W#16#1
Identifier
// Field 1 (here system data field)
// Subfield 1 SUB_IP_V4
// Subfield 2 SUBNET_MASK
SUBNET_MASK
// Subfield 3 default router
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5.5
Parameter Fields for Connection Types
General
Below, you will see which values need to be entered in the parameter fields and
which subfields are used for the various connection types.
Some applications do not require all the subfield types – refer once again to the
table for details.
Note
Please read the explanations of the configurable connection properties for the
individual connection type in Chapter 4!
Connection ID
The ID parameter that precedes each connection parameter field beside the type
ID is particularly important.
On programmed connections, you can assign this ID freely within the permitted
range of values. You must then use this ID on the call interface of the FCs for the
SEND/RECV interface to identify the connection.
Range of values for the connection ID:
152
S
S7-400: 1,2 through 64
S
S7-300: 1,2 through 16
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5.5.1
Parameter Field for TCP Connection
Structure
Type = 1
Identifier for the connection type
ID = connection ID
Freely assignable connection reference;
must be specified in AG_SEND / AG_RECV.
No_of_subfields = n
Range of values for the connection ID:
Subfield 1
S S7-400: 1,2 through 64
S S7-300: 1,2 through 16
Subfield 2
Subfield n
Usable Subfields
Table 5-2
Parameter
Subfield
ID
Type
*)
Special Features / Notes
(Please refer also to the general
description in Table 5-7 Page 159)
Use
( mandatory
/ optional)
1
SUB_IP_V4
IP address of the partner
m
9
SUB_LOC_PORT
–
m
10
SUB_REM_PORT
–
m
18
SUB_CONNECT_NAME
–
o
19
SUB_LOC_MODE
–
o
21
SUB_KBUS_ADR
This value is always set to 0 for CPs for the
S7-300 and does not need to be specified.
22
SUB_CON_ESTABL
–
m (for
S7-400)
m
*) The general properties of the subfield types are described below in Section 5.6.
Note
Please read the description of the configurable connection properties for the TCP
connection in Section 4.6!
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5.5.2
Parameter Field for a UDP Connection
Structure
Type = 2
Identifier for the connection type
ID = connection ID
No_of_subfields = n
Subfield 1
Freely assignable connection reference;
must be specified in AG_SEND / AG_RECV.
Range of values for the connection ID:
S S7-400: 1,2 through 64
S S7-300: 1,2 through 16
Subfield 2
Subfield n
Usable Subfields
Table 5-3
Parameter
Subfield
ID
Type
*)
Special Features / Notes
(Please refer also to the general
description in Table 5-7 Page 159)
Use
( mandatory
/ optional)
1
SUB_IP_V4
IP address of the partner
m
9
SUB_LOC_PORT
–
m
10
SUB_REM_PORT
–
m
18
SUB_CONNECT_NAME
–
o
19
SUB_LOC_MODE
–
o
21
SUB_KBUS_ADR
This value is always set to 0 for CPs for the
S7-300 and does not need to be specified.
m (for
S7-400)
22
SUB_CON_ESTABL
–
m
23
SUB_ADDR_IN_DATABLO
CK
If the “Free UDP connection” is selected for
this parameter, the parameters
SUB_IP_V4, SUB_LOC_PORT,
SUB_REM_PORT are omitted.
o
*) The general properties of the subfield types are described below in Section 5.6.
Note
Please read the description of the configurable connection properties for the for
the UDP connection in Section 4.7!
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5.5.3
Parameter Field for an ISO-on-TCP Connection
Structure
Type = 3
Identifier for the connection type
ID = connection ID
No_of_subfields = n
Subfield 1
Freely assignable connection reference;
must be specified in AG_SEND / AG_RECV.
Range of values for the connection ID:
S S7-400: 1,2 through 64
S S7-300: 1,2 through 16
Subfield 2
Subfield n
Usable Subfields
Table 5-4
Parameter
Subfield
ID
Type
*)
Special Features / Notes
(Please refer also to the general
description in Table 5-7 Page 159)
Use
( mandatory
/
optional)
1
SUB_IP_V4
IP address of the partner
m
11
SUB_LOC_TSAP
–
m
12
SUB_REM_TSAP
–
m
18
SUB_CONNECT_NAME
–
o
19
SUB_LOC_MODE
–
o
21
SUB_KBUS_ADR
This value is always set to 0 for CPs for the
S7-300 and does not need to be specified.
m (for
S7-400)
22
SUB_CON_ESTABL
–
m
*) The general properties of the subfield types are described below in Section 5.6.
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5.5.4
Parameter Field for an E-Mail Connection
Meaning
To send E-mails, you must always set up one E-mail connection per IT-CP. The
E-mail connection specifies the mail server, over which all the E-mails sent by the
IT-CP are delivered.
You will find a detailed description of how to use the E-mail function with IT-CPs in
/5/.
Structure
Identifier for the connection type
Type = 4
ID = connection ID
No_of_subfields = n
Subfield 1
Freely assignable connection reference;
must be specified in AG_SEND.
Range of values for the connection ID:
S S7-400: 1,2 through 64
S S7-300: 1,2 through 16
Subfield 2
Subfield n
Usable Subfields
Table 5-5
Parameter
Subfield
ID
1
Type *)
SUB_IP_V4
Special Features / Notes
(Please refer also to the general
description in Table 5-7 Page 159)
IP address of the mail server, over which
the E-mails are sent.
Use
( mandatory
/ optional)
m / o **)
The IP address can be specified in
absolute or symbolic form.
The symbolic form assumes that the IT-CP
knows the address of the domain name
server (DNS). This must be entered during
configuration of the IT-CP in HW Config, for
more detailed information, refer to the
online help of HW Config.
3
SUB_DNS_NAME
DNS name of the E-mail server
m / o **)
13
SUB_EMAIL_SENDER
E-mail address of the sender
m
18
SUB_CONNECT_NAME
–
o
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Table 5-5
, continued
Subfield
Parameter
Type *)
ID
Special Features / Notes
(Please refer also to the general
description in Table 5-7 Page 159)
Use
( mandatory
/ optional)
21
SUB_KBUS_ADR
This value is always set to 0 for CPs for the
S7-300 and does not need to be specified.
m (for
S7-400)
22
SUB_CON_ESTABL
–
m
*) The general properties of the subfield types are described below in Section 5.6.
**) The parameters SUB_IP_V4 and SUB_DNS_NAMEare mutually exclusive; one or the other must be
specified.
Note
Mail server ports are well-known ports and do not need to be specified.
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5.5.5
Parameter field for FTP connection
Meaning
To handle an FTP job sequence between the S7 station as FTP client and an FTP
server, the IT-CP must set up a connection to the S7-CPU. This connection is
known in this context as an FTP connection.
FTP connections are TCP connections, with the parameter SUB_LOC_MODE set
to the “FTP” mode.
You will find a detailed description of how to use the FTP function with IT-CPs in
/5/.
Structure
Type = 1
Identifier for the connection type
ID = connection ID
No_of_subfields = n
Subfield 1
Freely assignable connection reference;
must be specified in the FC FTP_**.
Range of values for the connection ID:
S S7-400: 1,2 through 64
S S7-300: 1,2 through 16
Subfield 2
Subfield n
Usable Subfields
Table 5-6
Parameter
Subfield
ID
Type
Special Features / Notes
(Please refer also to the general
description in Table 5-7 Page 159)
Use
( mandatory
/ optional)
18
SUB_CONNECT_NAME
–
o
19
SUB_LOC_MODE
here: 0x01 = FTP protocol
m
21
SUB_KBUS_ADR
This value is always set to 0 for CPs for the
S7-300 and does not need to be specified.
m (for
S7-400)
*) The general properties of the subfield types are described below in Section 5.6.
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5.6
Subfield types
Different parameters are required depending on the parameter field. Each
parameter is described by a subfield. Which subfields are required is explained in
the descriptions of the system data and the connection types in the previous
sections.
Each subfield consists of the specific parameter section and the header (4 Byte).
Example
The following excerpt from a CONF_DB illustrates the structure of a subfield based
on the example of the SUBNET_MASK subfield type.
Address
Header
Parameter
Name
Type
Initial Value
Comment
+14.0
Sub_field_2
STRUCT
+0.0
Sub_field_ID
INT
2
// Subfield 2 type SUBNET_MASK
// Subfield ID
+2.0
Sub_field_len
INT
8
// Total length of the subfield in bytes
+4.0
Parameter
STRUCT
+0.0
Value_1
BYTE
B#16#FF
+1.0
Value_2
BYTE
B#16#FF
+2.0
Value_3
BYTE
B#16#FF
+3.0
Value_4
BYTE
B#16#0
=4.0
END_
STRUCT
=8.0
END_
STRUCT
Parameter range of SUBNET_MASK
In total, the following subfield types are available:
Table 5-7
Subfield
ID 1)
Subfield type
Subfield
length (in
bytes)
Meaning of the Parameter
1
SUB_IP_V4
4+4
IP address according to IPv4
2
SUB_NETMASK
4+4
Subnet mask
3
SUB_DNS_NAME
Length of
DNS name +
4
DNS name
4
SUB_DNS_SERV_ADDR
4+4
DNS server address
8
SUB_DEF_ROUTER
4+4
IP address of default router
9
SUB_LOC_PORT
2+4
Local port
10
SUB_REM_PORT
2+4
Remote port, also for E-mail connections
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Table 5-7
Subfield
ID 1)
, continued
Subfield type
Subfield
length (in
bytes)
Meaning of the Parameter
11
SUB_LOC_TSAP
TSAP length
+4
Local TSAP
12
SUB_REM_TSAP
TSAP length
+4
Remote TSAP
13
SUB_EMAIL_SENDER
Length of the E-mail address of the sender
sender
E-mail
address + 4
14
SUB_DHCP_ENABLE
1+4
Obtain an IP address from a DHCP server
S Possible values:
0 = no DHCP
1 = DHCP
(optional)
15
SUB_CLIENT_ID
Length of the
client ID + 4 (optional)
18
SUB_CONNECT_NAME
Length of the Name of the connection
name + 4
19
SUB_LOC_MODE
1+4
Local mode of the connection
S Possible values:
0x00 = SEND/RECV
0x01 = FTP protocol (TCP connection
only)
0x10 = S5 addressing mode for
FETCH/WRITE *)
0x80 = FETCH *)
0X40 = WRITE *)
If you do not set the parameter, the default
setting is SEND/RECV.
*) Note:
The specified codings can be can be
combined by ORing them.
20
SUB_REM_MODE
1+4
Setting the mode on the communication
partner.
(not currently supported)
22
SUB_CON_ESTABL
1+4
Type of connection establishment.
With this option, you specify whether the
connection is established by this S7 station.
S Possible values:
0 = passive
1 = active
Refer also to Chapter 4 under ”Specifying
the local connection endpoint” for the
individual connection types.
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Table 5-7
, continued
Subfield
ID 1)
Subfield type
23
SUB_ADDR_IN_DATABLO
CK
Subfield
length (in
bytes)
1+4
Meaning of the Parameter
Select free UDP connection.
The remote node is entered in the job
header of the job buffer by the user
program when it calls AG_SEND. This
allows any node on Ethernet/LAN/WAN to
be reached.
S Possible values:
1 = free UDP connection.
0 = otherwise
The parameter is practical only for a UDP
connection.
See also Section 4.7.5
1) Note: ID numbers not listed are not currently used.
-
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Programming FCs (Functions) and FBs for
S7 Ethernet CPs
6
The interface to several communication services is implemented by ready-made
program blocks (FCs and FBs). This chapter includes a detailed description of
these blocks.
The description of each FC / FB includes the following sections that may be
extended by specific information:
S
Meaning
S
Call Interface
S
How the Block Works
S
Explanation of the Formal Parameters
S
Condition Codes
This chapter provides you with information over and above the general information
available in the online help for the FCs when programming in STEP 7.
You will find further information in the following sources:
S
The communication FBs (BSEND, BRCV, PUT, GET, USEND, URCV,
C_CNTRL) for programming S7 communication are described in the STEP 7
Documentation /9/.
Sample configurations and programs are available for the SEND/RECEIVE
interface described here:
S
In the sample project PROJECT_ETHERNET that you can start immediately
after installing NCM S7; for a description, refer to the Primer /3/.
S
On the Internet as downloadable sample projects; refer to the information in
Appendix C “Support and Training”.
The Quick Start CD that can be ordered separately is a
treasure-trove of sample programs and configurations.
You can order this directly on the Internet at:
http://www.ad.siemens.de/csi/net
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6.1
General Notes on FCs / FBs
Block Library
The functions (FCs) and function blocks (FBs) described here are supplied with the
STEP 7 basic package unless indicated otherwise.
The following list shows the numbers of the FCs as they are supplied with the
configuration tool. You can change these numbers.
Under SIMATIC_NET_CP, you can also see which folders contain blocks after
installing the NCM S7 for Industrial Ethernet option (default setting in STEP 7
Setup). Please note that you must use different FCs for the S7-300 and S7-400
(separate libraries).
Communication
S
Service
i /
Functional Area
Block Type
SIMATIC Manager Library
Described in
SIMATIC_NET_CP
CP 300
CP 400
SEND/RECEIVE FC5
AG_SEND
x
x
Section 6.3
(S5-compatible
communication)
AG_RECV
x
Programmed
Communication
Connections
S7
communication
i ti
164
FC6
FC50
AG_LSEND
x
Section 6.3
x
2)
x
Section 6.3
x
2)
x
Section 6.3
FC60
AG_LRECV
FC7
AG_LOCK
x
x
Section 6.4
FC8
AG_UNLOCK
x
x
Section 6.4
FB55
IP_CONFIG
x
–
Section 6.5
FB12
BSEND
x
FB13
BRCV
x
FB15
PUT
x
FB14
GET
x
FB8
USEND
x
FB9
URCV
x
FC62
C_CNTRL
x
STEP 7
D
Documentation
t ti
/9/
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Communication
Service /
Functional Area
FTP (IT-CPs)
PROFInet
1)
2)
Block Type
SIMATIC Manager Library
Described in
SIMATIC_NET_CP
CP 300
CP 400
FC40
FTP_CONNECT
x
x
FC41
FTP_STORE
x
x
FC42
FTP_RETRIEVE
x
x
FC43
FTP_DELETE
x
x
FC44
FTP_QUIT
x
x
FB88 1)
PN_InOut 1)
x
SIMATIC NET
IT CP Manual
IT-CP,
M
l /5/
Manual CP
343-1 PN /1/
FB88 supplied along with the engineering tool SIMATIC iMap.
Not to be used for current CPs
Which Block Version Should I Use?
The following descriptions also include information on differences between the
various block versions. Please take note of the version identifiers of the blocks you
are using.
The SIMATIC Manager block libraries installed with STEP 7 / NCM S7 contain the
block versions that were current at the time of the STEP 7 release.
Note
We recommend that you always use the latest block versions for all module types.
You will find information on the current block versions and the current blocks to
download from the Internet in our customer support.
http://www4.ad.siemens.de/view/cs/de/8797900
Entry ID: 8797900
With the older module types, this recommendation assumes that you are using the
latest firmware for the particular block type.
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Notice
At various points in this chapter, you will find information on the different CP
versions. These passages are highlighted with the following symbol:
Newer CP types are CPs / module types with the following versions or higher:
CP 343-1 / CP 343-1 EX20
6GK 343-1EX11-0XE0 version 1 or higher / firmware version V2.0 or higher
6GK 343-1EX20-0XE0 version 1 or higher / firmware version V1.0 or higher
CP 343-1PN
6GK 343-1HX00-0XE0 version 1 or higher / firmware version V1.0 or higher
CP 343-1 IT / CP 343-1 IT GX20
6GK 343-1GX11-0XE0 version 1 or higher / firmware version V2.0 or higher
6GK 343-1GX20-0XE0 version 1 or higher / firmware version V1.0 or higher
FCs and Module Replacement (Spares)
Module replacement in this sense means the replacement of a module with
another module that may be a more recent version.
Notice
Please remember that if you replace a module, you must only use the blocks permitted for the configured CP type in the user program.
This means:
S If you replace the module without adapting the configuration data to the
possibly newer module type, you do not need to make any changes to the
blocks used.
S If you replace the module and you do adapt the configuration data to the newer
module type, you must use the block versions approved for this module type.
We recommend that you always use the latest block versions for all module types.
With the older module types, this recommendation assumes that you are using the
latest firmware for the particular block type.
You will find more information on replacing blocks in our Customer Support on the
Internet.
The manuals /1/ contain information on the compatibility of the S7-CPs and the
corresponding blocks (FCs / FBs).
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6.2
Setting Parameters for FC Calls
Before describing the FCs in detail, a few general comments on calling and setting
parameters for FCs will be useful in this point.
It is possible to make the following general statements about the following
parameter groups that occur in all FCs:
S
Parameters for CP and connection assignment (input parameters)
S
Parameters for specifying a CPU data area (input parameters)
S
Status information (output parameters)
Calling Communication Blocks for an S7-300
Caution
The communication blocks for S7-300 (SIMATIC NET block libraries for S7-300 in
STEP 7) must not be called in more than one priority class! If, for example, you
call a communication block in OB1 and in OB35, block execution could be interrupted by the higher-priority OB.
If you call blocks in more than one OB, you must write your program so that a
communication block that is currently executing cannot be interrupted by another
communication block (for example by disabling/enabling SFC interrupts).
6.2.1
Parameters for CP and Connection Assignment (input
parameters)
When you call an FC, you transfer the module start address of the Ethernet CP in
the CPLADDR or LADDR parameter. The module start address of the Ethernet CP
can be found in the properties dialog of the CP in the ”Address/Input” tab (can be
selected in the SIMATIC Manager or in HW Config).
With connection-oriented jobs, you must also reference the connection to be used
by its connection ID. You will find this in the properties dialog of the connection
under “Block parameters” (refer to the information in NetPro).
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Setting Block Parameters Automatically1)
To ensure correct parameter settings for the block calls, The LAD/STL/FBD editor
in STEP 7 provides you with the option of accepting all the relevant parameters
from the hardware configuration (HW Config) and from the connection
configuration (NetPro).
When assigning the parameters for the block in the user program, follow the steps
outlined below:
1. Select the block call and its block parameters;
2. Right-click and select the menu command “Connections...” .
3. Depending on the block type, you can now select the connection and/or module
intended for the block from a list.
4. Confirm your selection; as far as possible, the available parameter values are
entered in the block call.
Response to Incorrect Addresses
If the S7 CPU cannot communicate with the Ethernet CP using the specified
module base address, the errors described below occur.
Cause
Reaction / Code
No module can be addressed or
identified at the specified CP address.
The CPU remains in the stop with system error
state; in this case, evaluate the diagnostic
buffer of the CPU.
The CP address points to a different
module type.
Possible error code in the STATUS parameter
of the communication block:
8184H
80B0H
80C0H
80C3H
80D2H
System error
Module does not
recognize data
record.
Data record cannot
be read.
Resources
occupied (memory).
Logical base address
wrong.
Notice
If you inadvertently address not a CP but another module type, errors occur that
cannot be indicated by the error messages of the FCs themselves.
1).
168
This function is possible only with the block library ..V5.0 SP3 or later.
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6.2.2
Parameters for Specifying a CPU Data Area (input parameters)
Specifying the Data Area on the CPU
When you call an FC, you transfer the address and length of the data area on the
CPU in which the user data are available or will be stored or which can contain
further parameter information.
The ANY pointer data type is used to address this area. For more detailed
information on this data type, refer to the STEP 7 online help under the topic
“Format of the Parameter Type ANY”. You will also find a detailed description of
the ANY point in /21/.
6.2.3
Status Information (output parameters)
For status evaluation, the following parameters must be evaluated in the user
program:
S
DONE or NDR
These parameters (DONE with send jobs and NDR with receive jobs) signal
(successful) completion of the job.
S
ERROR
This indicates that the job could not be executed error-free.
S
STATUS
This parameter supplies detailed information about the execution of the job.
Status codes can be returned during execution of the job (DONE=0 and
ERROR=0).
Evaluating Status Codes
Remember that the status codes DONE, NDR, ERROR, STATUS are updated at
each block call.
Status Codes during CP Startup
With a startup or restart of the Ethernet CP (after activating a switch on the
module), the output parameters of the FC are reset as follows:
S
DONE = 0
S
NDR = 0
S
ERROR = 0
S
STATUS = 8180H for AG_RECV / AG_LRECV or 8181H for AG_SEND
/AG_LSEND
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6.3
FCs for the SEND/RECEIVE Interface
Overview
The following FCs are available for transferring data on the SEND/RECEIVE
interface:
FC
Can be used with 1)
Meaning
S7 – 300
S7 – 400
AG_SEND (FC5)
x
x
for sending data
AG_RECV (FC6)
x
x
for receiving data
AG_LSEND (FC50)
x
for sending data
AG_LRECV (FC60)
x
for receiving data
1)
S
Notes on the FCs in FCs for an S7-300 and S7-400
S7-300:
With older versions of the Ethernet CPs, the data length per job is restricted to
<=240 bytes (applies up to block version V3.0 of AG_SEND / AG_RECV); with
later versions, longer data records (up to 8192 bytes) can be transferred with
FCs AG_LSEND or AG_LRECV.
With the latest versions of the Ethernet CPs, only FCs AG_SEND and
AG_RECV are used; due to a new and more efficient internal protocol, the data
up to 8192 bytes can be transferred.
S
S7-400:
With FCs AG_SEND / AG_RECV the data length per job is restricted to <=240
bytes.
Longer data records (up to 8192 bytes) can be transferred with FCs
AG_LSEND or AG_LRECV.
Please check the manual /3/ of the S7-CP you are using for the data areas
supported. You will find an overview of the versions of the FCs/FBs in the
documentation and block history.
Application
The following diagram illustrates the use of the FCs described here for
bi-directional data transfer on one configured connection.
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CPU
Ethernet CP
Ethernet CP
CPU
STEP 7
user
program
STEP 7
user program
User data areas
User data areas
AG_SEND
send
receive
AG_RECV
send
AG_SEND
Connection
AG_RECV
receive
Note
Unless specifically stated otherwise, the information on this and the following
pages refers to AG_SEND / AG_LSEND or AG_RECV / AG_LRECV.
Specifying the Data Area on the CPU
When you call an FC, you transfer the address and length of the data area in the
CPU. Remember, that the maximum length of the data area depends on the block
type and block version being used.
S
AG_SEND and AG_RECV
Up to version V3.0 of these blocks, a maximum of 240 bytes could be sent or
received. The current block versions allow a data area of up to 8192 bytes for
an S7-300. With an S7-400, the FCs AG_LSEND / AG_LRECV must still be
used for larger data areas.
S
AG_LSEND / AG_LRECV
Using the CPs of the S7-400 and with earlier versions of the S7-300, larger
data areas can only be transferred with the FCs AG_LSEND or AG_LRECV.
Please check the length of the data area in the product information.
The following table shows the limit values of the various connection types.
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Table 6-1
FC
ISO Transport
ISO-on-TCP
TCP
UDP
AG_LSEND
(S7-400)
8192 bytes
8192 bytes
8192 bytes
2048 bytes
8192 bytes
8192 bytes
8192 bytes
2048 bytes
AG_SEND
(S7-300)
AG_LRECV
(S7-400)
AG_RECV
(S7-300)
Note
For information on the length of the data area you can transfer with older versions
of the Ethernet CPs, refer to the product information bulletin / manual of the
Ethernet CP you are using /1/.
Working without the Job Header
On specified connections, the address and job parameters are specified by the
connection configuration. The user program only provides the user data in the UDP
data area when sending with AG_SEND / AG_LSEND or receives the data with
AG_RECV / AG_LRECV.
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Working with the Job Header
Free UDP connections require a job header in the user data area.
The following schematic illustrates the structure of the job buffer and the meaning
and location of the parameters in the job header.
User data area
Port
Job buffer
IP address
Job header
User data
Figure 6-1
03H (high byte)
8EH
28H
EBH (low byte)
0BH
23H
Data byte 0
Data byte 1
Data byte 2040
Data byte 2041
Bytes 0,1
Bytes 2,3
Bytes 4,5
Bytes 6,7
Bytes
2046,2047
Sending and Receiving on a Free UDP Connection with Programmed Addresses
S
In the picture (entries in hexadecimal) the following IP address is assumed:
142.11.40.35 (example only);
S
For the port address 1003, the following would be entered: for high byte: 03H;
for low byte: EBH.
S
The user data area can be up to 2048 bytes long. Up to 2042 bytes of user data
can be transferred. 6 bytes are reserved for the job header.
Please note that the data length specified in the block call (LEN parameter)
must include the header and the user data!
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6.3.1
FC5 AG_SEND / FC50 AG_LSEND
Meaning of the Block
The FCs AG_SEND / AG_LSEND pass data to the Ethernet CP for transfer over a
configured connection.
The selected data area can be a process image area, a memory bit area or a data
block area.
Error-free execution of the function is indicated when the entire user data area
could be sent on Ethernet.
The way in which the FC functions depends on the CP type you are using. Please
note the differences in the following section.
Note:
Unless otherwise stated, all the following information applies to both the FCs
AG_SEND and AG_LSEND.
Call
Call interface in LAD representation
AG_SEND / AG_LSEND
BOOL
ACT
DONE
BOOL
INT
ID
ERROR
BOOL
WORD
LADDR
STATUS
WORD
ANY
SEND
INT
LEN
Example in STL representation
STL
call fc
ACT
ID
LADDR
SEND
LEN
DONE
ERROR
STATUS
174
Explanation
5
:=
:=
:=
:=
:=
:=
:=
:=
M 10.0
MW 12
W#16#0100
P#db99.dbx10.0 byte 240
MW 14
M 10.1
M 10.2
MW 16
//AG_SEND / AG_LSEND block call
//Job triggered by memory bit
//Connection ID acc. to configuration
//=LADDR 256 dec. in hw configuration
//Buffer with send data
//Length for send data
//Execution code
//Error code
//Status code
SIMATIC NET NCM S7 for Industrial Ethernet
Release 6/2003
C79000–G8976–C129–07
Programming FCs (Functions) and FBs for S7 Ethernet CPs
Notice
Please note the following special feature on TCP connections:
With the S7-CPs for S7-400, you must use FC AG_LSEND on TCP connections!
With the latest S7-CPs for S7-300, you must also use FC AG_SEND for TCP
connections.
How the Block Works
The following diagrams illustrate the normal sequence of data transmission
triggered in the user program using AG_SEND.
The way in which the FC functions depends on the CP type you are using.
S
Case a: Sequence with older CP types
With older CP types, the transfer of the entire data area regardless of its length
is started after the first block call by the CP.
S
Case b: Sequence with newer CP types (S7–300 only !)
With the newer CP types, data transfer has been optimized. In particular with
longer data records, this allows a much higher data throughput on the interface
between the CPU and CP.
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S
Case a: Sequence with older CP types
The send job is executed as soon as the parameter ACT = 1 is passed.
Following this, the parameter ACT = 0 must be passed in at least one further
call.
The status code in the output parameters DONE, ERROR and STATUS is
updated in each block call and can be evaluated. To update the status code
without starting a new send job, start a new block call with the parameter ACT =
0.
Refer to the sample program at the end of Section 6.3.1.
User program
(CPU cycle)
Ethernet CP
Communications Partner
Supply AG_SEND with
data “X”
ACT = 1
AG_SEND
Job active1)
Transfer
“X”
active on
Ethernet
Supply AG_SEND
ACT = 0
AG_SEND
Job active1)
AG_SEND
Job completed without error1)
Time
Time
Time
Legend:
1) parameter transfer DONE, ERROR, STATUS
176
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S
Case b: Sequence with newer CP types (S7–300 only !)
The send job is started as soon as the parameter ACT = 1 is passed.
In contrast to case a, the protocol used here to transfer the data segments
(each 240 bytes of user data) requires the FC to be called again for each
segment.
Depending on the length of the user data, you must therefore continue to call
the FC with ACT=0 until transfer of the entire data record is indicated; at least
one call with ACT=0 is always necessary. The data is transferred to the
communication partner in segments of 240 bytes.
The status code in the output parameters DONE, ERROR and STATUS is
updated in each block call and can be evaluated.
User program
(CPU cycle)
Ethernet CP
Communications Partner
Supply AG_SEND with
data “X”
ACT = 1
AG_SEND
Job active1)
Transfer of field 1 active on
Ethernet
Data record X is
transferred in
segments.
Supply AG_SEND
ACT = 0
AG_SEND
Job active1)
AG_SEND
Job active1)
AG_SEND
Job active1)
Transfer of field 2 active on
Ethernet
Transfer of field n–1 active
on Ethernet
Transfer of field n active on
Ethernet
AG_SEND
Job completed without error1)
Time
Time
Time
Legend:
1) parameter transfer DONE, ERROR, STATUS
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Note
In principle, it is possible to call the FC more than once within the CPU cycle to
speed up the handling of the job. Do not forget, however, that this increases the
load during the CPU cycle (the load differs depending on the CPU type)!
Explanation of the Formal Parameters
The following table explains all the formal parameters for the AG_SEND
/AG_LSEND functions.
Parameter Declaration
Type
ACT
BOOL
INPUT
Possible
Values
0,1
Remarks
If an FC is called with ACT=1, LEN bytes are
sent from the ISO transport data area specified
with the SEND parameter.
If an FC is called with ACT = 0, the status
codes DONE, ERROR and STATUS are
updated.
ID
INPUT
INT
1,2...64
(S7-400)
1,2...16
(S7-300)
LADDR
INPUT
WORD
The connection number of the connection is
specified in the parameter ID. (see
Configuration Section 4.3.1
Module base address
When you configure the CP with STEP 7
hardware configuration, the module base
address is displayed in the configuration table.
Specify this address here.
SEND
INPUT
ANY
Specifies the address and length.
The address of the data area refers to one of
the following:
– Process image area
– Bit memory
– Data block area
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Parameter Declaration
Type
LEN
INT
INPUT
Possible
Values
Remarks
On ISO
Transport and
ISO-on-TCP /
TCP:
Number of bytes to be sent from the data area
with this job. The possible values range from 1
to length specified for the SEND parameter.
1,2,
1
2 tto 32767
(or up to “length
specified for
SEND
parameter”)
S Note the block type:
–
With older versions of FC AG_SEND
(up to V3.0), the data area is always
restricted to a maximum of 240 bytes.
The current versions allow up to 8192
bytes (2048 bytes for UDP).
On UDP:
1,2,...2048 (or
up to “length
specified for
SEND
parameter”)
S7-300
–
S7-400
With FC AG_SEND, the data area is
restricted to a maximum of 240 bytes.
S Note on the S7-400:
Data transfer may be restricted to
LEN<=240 bytes with older versions of the
CP firmware!
For further information, see /1/
S Improved performance with shorter data
records:
Transfer of data records up to 240 bytes
results in better performance regardless of
the block type used.
DONE
OUTPUT
BOOL
0: Job active
1: done
This parameter indicates whether or not the job
was completed without errors.
As long as DONE = 0, no further job can be
triggered. DONE is set to 0 by the CP when it
accepts a new job.
For the meaning of this parameter in
conjunction with the ERROR and STATUS
parameters, refer to the following table.
ERROR
OUTPUT
BOOL
0: –
1: error
For the meaning of this parameter in
conjunction with the DONE and STATUS
parameters, refer to the follow table.
STATUS
OUTPUT
WORD
see following
table
Status code
The following table shows the condition codes
formed by the DONE and ERROR parameters.
Condition Codes
The following table shows the condition codes formed by the DONE, ERROR and
STATUS parameters that must be evaluated by the user program.
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Note
For entries coded with 8FxxH in STATUS, refer to the information in the STEP 7
Standard and System Functions reference manual. The chapter describing error
evaluation with the RET_VAL output parameter contains detailed information.
To find out which SFCs are used and are relevant for error evaluation, display the
properties dialog of the FC described here in the “Calls” tab.
Table 6-2
AG_SEND / AG_LSEND Codes
DONE
ERROR
STATUS
Meaning
1
0
0000 H
Job completed without error.
0
0
0000 H
No job being executed.
0
0
8181H
Job active.
0
1
7000H
This code is possible only with the S7-300: the FC was called
with ACT=0; the job has not yet been processed.
0
1
8183H
No configuration or the ISO/TCP service has not yet started on
the Ethernet CP.
0
1
8184H
System error.
0
1
8185H
LEN parameter longer than SEND source area.
0
1
8186H
ID parameter invalid. ID!=1,2 to 64.
0
1
8302H
No receive resources on the destination station; the receiving
station cannot process received data quickly enough or has not
prepared any receive resources.
0
1
8304H
The connection is not established. The send job should only be
attempted again after waiting for at least 100 ms.
0
1
8311H
The destination station cannot be obtained under the specified
Ethernet address.
0
1
8312H
Ethernet error on the CP.
0
1
8F22H
Source area invalid, for example:
Area does not exist in the DB
LEN parameter < 0
0
1
8F24H
Area error reading a parameter.
0
1
8F28H
Alignment error reading a parameter.
0
1
8F32H
Parameter contains a DB number that is too high.
0
1
8F33H
DB number error.
0
1
8F3AH
Area not loaded (DB).
0
1
8F42H
Timeout reading a parameter from the I/O area.
0
1
8F44H
Address of the parameter to be read is disabled in the access
track.
0
1
8F7FH
Internal error, e.g. illegal ANY reference.
e.g. parameter LEN=0
180
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Programming FCs (Functions) and FBs for S7 Ethernet CPs
Table 6-2
AG_SEND / AG_LSEND Codes
DONE
ERROR
STATUS
Meaning
0
1
8090H
No module with this address exists or the CPU is in the STOP
mode.
0
1
8091H
Logical base address not at a double word boundary.
0
1
8092H
In the ANY reference, a type other than BYTE is specified.
(S7-400 only)
0
1
80A4H
The communication bus connection between the CPU and CP is
not established. (Only with newer CPU versions)
0
1
80B0H
The module does not recognize the data record.
0
1
80B1H
The specified length (in the LEN parameter) is incorrect.
0
1
80B2H
The communication bus connection between the CPU and CP is
not established.
0
1
80C0H
The data record cannot be read.
0
1
80C1H
The specified data record is currently being processed.
0
1
80C2H
There are too many jobs pending.
0
1
80C3H
CPU resources (memory) occupied.
0
1
80C4H
Communication error (occurs temporarily and a repetition in the
user program will often remedy the problem).
0
1
80D2H
Module base address incorrect.
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Example of AG_SEND
Below you will find an executable example of an FC5 (AG_SEND) call and
parameter evaluation.
The OB100 listed below belongs to the FC100 selected here in which the send call
takes place; OB100 sets the ACT bit correctly when the CPU starts up.
To function correctly, a DB100 with a size of at least 240 bytes must be loaded.
The program requires a CP at address 256 and a configured connection of the
type ISO Transport / ISO-on-TCP / TCP with ID=1 (please adapt your configuration
where necessary !).
//––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––
FUNCTION FC 100: VOID
TITLE = SENDE_DEMO
AUTHOR : Tester
FAMILY : S7300
NAME : FC5_Demo
VERSION : 1.0
//–––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––
BEGIN
CALL FC 5 (
ACT
:= M100.0,
ID
:= 1,
LADDR
:= W#16#100,
SEND
:= P#DB100.dbx0.0 BYTE 240,
LEN
:= 240,
DONE
:= M100.1,
ERROR
:= M100.2,
STATUS
:= MW102 );
//––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––
R M100.0;
SET;
A M100.1;
JC done;
SET;
A M100.2;
JC err;
//
//
//
//
//
//
//
Reset parameter ACT for all further FC5 calls;
Test whether DONE = TRUE
Test whether ERROR = TRUE
//––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––
BEU;
//
//
Neither DONE nor ERROR is set, the job is
still running.
//––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––
done
S M100.0;
BEU;
//
//
Job completed without error. Set ACT = TRUE so
that the next call can trigger the new job.
//–––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––
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err:
NOP 1;
NOP 1;
S M100.0;
BEU;
//
//
//
//
An error occurred. The status word can be evaluated here. Set ACT to TRUE in any case, so
that a new send job can be triggered if the
error disappears.
//–––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––
END_FUNCTION
ORGANIZATION_BLOCK OB100
TITLE
= Init_for_FC100
FAMILY:
S7300
NAME: SENDE_DEMO_INIT
VERSION:
1.0
VAR_TEMP
OB1_System: array [1..20] of byte;
END_VAR
BEGIN
SET
S M100.0
END_ORGANIZATION_BLOCK
SIMATIC NET NCM S7 for Industrial Ethernet
Release 6/2003
C79000–G8976–C129–07
//
//
//
Initialize ACT parameter
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Programming FCs (Functions) and FBs for S7 Ethernet CPs
6.3.2
FC6 AG_RECV / FC60 AG_LRECV
Meaning of the Block
The AG_RECV / AG_LRECV function receives the data transferred on a
configured connection from the Ethernet CP.
The data area specified for the receive data can be a process image area, a bit
address area or a data block area.
Error-free execution is indicated when the data could be received from the
Ethernet CP.
Note:
Unless otherwise stated, all the following information applies to both the FCs
AG_RECV and AG_LRECV.
Call
Call interface in LAD representation
AG_RECV / AG_LRECV
NDR
BOOL
INT
ID
ERROR
BOOL
WORD
LADDR
STATUS
WORD
ANY
RECV
LEN
INT
Example in STL representation
STL
Explanation
call fc 6
//AG_RECV/AG_LRECV block call
ID
LADDR
RECV
NDR
ERROR
STATUS
LEN
184
:=
:=
:=
:=
:=
:=
:=
MW 40
W#16#0100
P#M 0.0 BYTE 100
DB 110.DBX 0.6
DB 110.DBX 0.7
DB 110.DBW 2
DB 110.DBW 4
//Connection ID acc. to configuration
//=LADDR 256 dec. in hardware configuration
//Buffer for received data
//Receive code
//Execution code
//Error code
//Status code
SIMATIC NET NCM S7 for Industrial Ethernet
Release 6/2003
C79000–G8976–C129–07
Programming FCs (Functions) and FBs for S7 Ethernet CPs
Notice
Please note the following special feature on TCP connections:
With the S7-CPs for S7-400, you must use FC AG_LRECV on TCP connections!
With the latest S7-CPs for S7-300, you must also use FC AG_RECV for TCP
connections.
How the Block Works
The following diagram illustrates the normal sequence of data acceptance
triggered by an AG_RECV in the user program.
Each AG_RECV job in the user program is acknowledged by the Ethernet CP with
an entry in the output parameters NDR, ERROR and STATUS.
The way in which the FC functions depends on the CP type you are using.
S
Case a: Sequence with older CP types
With older CP types, the transfer of the entire data area regardless of its length
is started after the first block call by the CP.
S
Case b: Sequence with newer CP types (S7–300 only !)
With the newer CP types, optimized data transfer on the SEND/RECEIVE
interface is available. In particular with longer data records, this allows a much
higher data throughput on the interface between the CPU and CP.
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S
Case a: Sequence with older CP types
When the FC is called, the user program prepares the buffer for the received
data and instructs the CP to enter the received data there.
As soon as a data record has been entered fully and consistently in the receive
buffer, this is indicated by the parameter NDR = 1 in one of the next FC calls.
The status code in the output parameters NDR, ERROR, and STATUS is
updated in each block call and can be evaluated.
User program
(CPU cycle)
Ethernet CP
AG_RECV
There are not yet
any data available 1)
Communications Partner
Transfer
“A”
active on
Ethernet
AG_RECV
New data accepted1)
Accept / evaluate
received data “A”
AG_RECV
There are not yet
any data available1)
Transfer
“B”
active on
Ethernet
AG_RECV
New data accepted1)
Accept / evaluate
received data “B”
AG_RECV
.
.
.
Time
Transfer
“C”
active on
Ethernet
Time
Time
Legend:
1) Parameter transfer NDR, ERROR, STATUS
186
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Programming FCs (Functions) and FBs for S7 Ethernet CPs
S
Case b: Sequence with newer CP types (S7–300 only !)
When the FC is called, the user program prepares the buffer for the received
data and instructs the CP to enter the received data there.
In contrast to case a, the protocol used here to transfer the data to the receive
buffer requires the FC to be called again for each data segment (240 bytes of
user data).
Depending on the length of the user data, you must therefore continue to call
the FC until transfer of the entire data record is indicated by the parameter NDR
= 1.
The status code in the output parameters NDR, ERROR, and STATUS is
updated in each block call and can be evaluated.
User program (CPU cycle)
Ethernet CP
AG_RECV
There are not yet
any data available 1)
Data record A is
entered segment by
segment in the
buffer.
AG_RECV
There are not yet
any data available 1)
Communications Partner
Transfer
of ’A’ (e.g. 520
bytes)
active on
Ethernet
AG_RECV
New data accepted1)
Accept / evaluate
received data “A”
AG_RECV
There are not yet
any data available1)
Data record A is
entered in the
buffer.
Transfer
of ’A’ (e.g. 240
bytes)
active on
Ethernet
AG_RECV
New data accepted1)
Accept / evaluate
received data “B”
AG_RECV
.
.
.
Data record C is
entered segment by
segment in the
buffer.
Time
Transfer
“C”
active on
Ethernet
Time
Time
Legend:
1) Parameter transfer NDR, ERROR, STATUS
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Explanation of the Formal Parameters
The following table explains all the formal parameters for the AG_RECV /
AG_LRECV function.
Parameter Declaration
Type
ID
INT
INPUT
Possible
Values
1,2...64
(S7-400)
1,2...16
(S7-300)
LADDR
INPUT
WORD
Remarks
The connection number of the ISO transport
connection is specified in the ID parameter (see
Configuration Section 4.3.1)
Module base address
When you configure the CP with STEP 7
hardware configuration, the module base
address is displayed in the configuration table.
Specify this address here.
RECV
INPUT
ANY
Specifies the address and length.
The address of the data area refers to one of
the following:
– Process image area
– Bit memory
– Data block area
Note on length:
Performance is improved in transfer of data
records up to 212 bytes if you also restrict the
length to 212 with the RECV parameter.
NDR
OUTPUT
BOOL
0: –
1: new data
This parameter indicates whether new data
were received.
For the meaning of this parameter in
conjunction with the ERROR and STATUS
parameters, refer to the following table.
ERROR
OUTPUT
BOOL
0: –
1: error
Error code
For the meaning of this parameter in
conjunction with the DONE and STATUS
parameters, refer to the following table.
STATUS
OUTPUT
WORD
see following
table
Status code
For the meaning of this parameter in
conjunction with the NDR and ERROR
parameters, refer to the following table.
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Programming FCs (Functions) and FBs for S7 Ethernet CPs
Parameter Declaration
Type
LEN
INT
OUTPUT
Possible
Values
On ISO
Transport and
ISO-on-TCP:
Remarks
Specifies the number of bytes accepted from
the Ethernet CP and entered in the data area.
S Note the block type:
1,2...8192
–
S7-300
With older versions of FC AG_RECV (up
to V3.0), the data area is always
restricted to a maximum of 240 bytes.
On UDP:
1,2...2048
The current versions allow up to 8192
bytes (2048 bytes for UDP).
–
S7-400
With FC AG_RECV, the data area is
restricted to a maximum of 240 bytes.
Condition Codes
The following table shows the codes formed by the DONE, ERROR and STATUS
parameters that must be evaluated by the user program.
Note
For entries coded with 8FxxH in STATUS, refer to the information in the STEP 7
Standard and System Functions reference manual. The chapter describing error
evaluation with the RET_VAL output parameter contains detailed information.
To find out which SFCs are used and are relevant for error evaluation, display the
properties dialog of the FC described here in the “Calls” tab.
Table 6-3
AG_RECV / AG_LRECV Codes
NDR
ERROR
STATUS
Meaning
1
0
0000 H
New data accepted.
0
0
8180H
There are not yet any data available.
0
0
8181H
Job active.
0
1
8183H
No configuration or the ISO transport service has not yet started
on the Ethernet CP.
0
1
8184H
System error (the source data area is incorrect).
0
1
8185H
Destination buffer (RECV) is too short.
0
1
8186H
ID parameter invalid.
ID != 1,2....16 (S7-300).
ID != 1,2....64.(S7-400)
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Table 6-3
AG_RECV / AG_LRECV Codes
NDR
ERROR
STATUS
Meaning
0
1
8304H
The connection is not established. The send job should only be
attempted again after waiting for at least 100 ms.
0
1
8F23H
Source area invalid, for example:
Area does note exist in the DB.
0
1
8F25H
Area error writing a parameter.
0
1
8F29H
Alignment error writing a parameter.
0
1
8F30H
Parameter is in the write-protected first current data block.
0
1
8F31H
Parameter is in the write-protected second current data block.
0
1
8F32H
Parameter contains a DB number that is too high.
0
1
8F33H
DB number error.
0
1
8F3AH
Destination area not loaded (DB).
0
1
8F43H
Timeout writing a parameter to the I/O area.
0
1
8F45H
Address of the parameter to be read is disabled in the access
track.
0
1
8F7FH
Internal error, e.g. illegal ANY reference.
0
1
8090H
No module with this address exists or the CPU is in the STOP
mode.
0
1
8091H
Logical base address not at a double word boundary.
0
1
8092H
In the ANY reference, a type other than BYTE is specified.
(S7-400 only)
0
1
80A0H
Negative acknowledgment reading from the module.
0
1
80A4H
The communication bus connection between the CPU and CP is
not established.
0
1
80B0H
The module does not recognize the data record.
0
1
80B1H
Destination area invalid.
0
1
80B2H
The communication bus connection between the CPU and CP is
not established.
0
1
80C0H
The data record cannot be read.
0
1
80C1H
The specified data record is currently being processed.
0
1
80C2H
There are too many jobs pending.
0
1
80C3H
CPU resources (memory) occupied.
0
1
80C4H
Communication error (occurs temporarily and a repetition in the
user program will often remedy the problem).
0
1
80D2H
Module base address incorrect.
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Programming FCs (Functions) and FBs for S7 Ethernet CPs
6.4
FCs for Access Coordination with FETCH/WRITE
Overview
The following FCs are available for FETCH/WRITE function to coordinate access:
can be used with:
FC
Meaning
S7 – 300
S7 - 400
AG_LOCK (FC7)
x
x
Locks external data access
with FETCH/WRITE.
AG_UNLOCK (FC8)
x
x
Releases external data
access with FETCH/WRITE.
Caution when Configuring
If you use FCs AG_LOCK and AG_UNLOCK, you must specify the following
information for S7-400 stations in the configuration:
S
in HW Config
In the “Addresses” tab, the option “Address setting for LOCK/UNLOCK” must
be selected.
How the Block Works
With these FCs, you can coordinate access to system memory areas so that no
inconsistent data are created and transferred. The control is from the user program
in the S7 CPU that can, if necessary disable an external FETCH/WRITE access
using an AG_LOCK call. After a certain time or after the local write/read access is
completed, an AG_UNLOCK job can be used to enable external access again.
Another advantages is that this access lock only applies to the FETCH/WRITE
connection specified in the call. If more than one FETCH/WRITE connections are
configured, these can, for example, be used for certain specific system areas and
a selective access coordination can be implemented.
The following diagram illustrates the usual chronological sequence of memory
access coordination controlled in the user program with AG_LOCK and
AG_UNLOCK.
SIMATIC NET NCM S7 for Industrial Ethernet
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User program
(CPU cycle)
Ethernet CP
AG_LOCK
Cycle n
FETCH/WRITE
access to DB x
active
LOCKED = 0
AG_LOCK
Cycle n+1
Communications Partner
LOCKED = 0
AG_LOCK
LOCKED = 1
FETCH/WRITE
Cycle n+2
FETCH/WRITE rejected
...
Data
processing
in DB x
AG_UNLOCK
Cycle n+m
STATUS = 700x
Time
FETCH/WRITE
access to DB x
active
Time
Time
The lock job must first be monitored in the user program using the code in the
return parameter LOCKED. As long as LOCKED=0 is indicated, it must be
assumed that there is still a FETCH/WRITE access active.
If LOCKED=1 is indicated, this shows that the lock is active; data can now be
modified by the user program.
The status code is updated at each block call.
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6.4.1
FC7 AG_LOCK
Meaning of the Block
Using the AG_LOCK block the data exchange using FETCH or WRITE on the
connection selected with the parameter ID is disabled. The LOCKED output
indicates whether or not the lock was successful. If the lock was not successful,
the job must be triggered again in a later CPU cycle.
The STATUS output indicates the status of the CP for this connection.
Call
Representation of the AG_LOCK Function
AG_LOCK
ID
STATUS
LADDR
LOCKED
Example in STL representation
STL
call fc 7
ID
:=
LADDR
:=
STATUS :=
LOCKED :=
Explanation
DB 100.DBW 2
W#16#0100
DB 100.DBW 4
DB 100.DBX 0.6
//Block call
//Connection ID acc. to configuration
//=LADDR 256 dec. in hardware configuration
//Status code
//Status code of access disable
Explanation of the Formal Parameters
The following table explains all the formal parameters for the AG_LOCK function:
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Parameter Declaration
Type
ID
INT
INPUT
Possible
Values
1,2...16 for
S7-300
1,2...64 for
S7-400
LADDR
INPUT
WORD
Remarks
The connection number of the connection is
specified in the parameter ID. (see
Configuration Section 4.3.1)
Module base address
When you configure the CP with STEP 7
hardware configuration, the module base
address is displayed in the configuration table.
Specify this address here.
LOCKED
OUTPUT
BOOL
0: not (yet)
locked
1: locked
Shows the status of the access lock requested
on the specified FETCH/WRITE connection.
STATUS
OUTPUT
WORD
see following
table
Status code
For meaning, refer to the table below.
Condition Codes
The following table shows the STATUS code that must be evaluated by the user
program.
Table 6-4
AG_LOCK Condition Codes
STATUS
Meaning
7000
CP is not processing a job
7001
FETCH active
7002
WRITE active
8183
FETCH/WRITE not configured for this connection
8186
ID number not in permitted range (e.g. 1...64 with S7-400 Industrial Ethernet CPs)
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6.4.2
FC8 AG_UNLOCK
Meaning of the Block
Using the AG_UNLOCK function, the external access to system areas on the S7
CPU with FETCH or WRITE on the connection specified by the ID parameter is
released.
The next external FETCH/WRITE job to arrive for the CP can then be processed.
The AG_UNLOCK follows an access lock with AG_LOCK.
Call
Representation of the AG_UNLOCK Function
AG_UNLOCK
ID
STATUS
LADDR
Example in STL representation
STL
call fc 8
ID
:=
LADDR
:=
STATUS :=
Explanation
DB 100.DBW 2
W#16#0100
DB 100.DBW 4
//Block call
//Connection ID acc. to configuration
//=LADDR 256 dec. in hardware configuration
//Status code
How the Block Works
To release the connection again, the LOCK request bit must be reset by the FC
again. The FC also shows the current status using error messages.
Explanation of the Formal Parameters
The following table explains all the formal parameters for the AG_UNLOCK
function:
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Parameter Declaration
Type
ID
INT
INPUT
Possible
Values
1,2...16 for
S7-300
1,2...64 for
S7-400
LADDR
INPUT
WORD
Remarks
The connection number of the connection is
specified in the parameter ID. (see
Configuration Section 4.3.1)
Module base address
When you configure the CP with STEP 7
hardware configuration, the module base
address is displayed in the configuration table.
Specify this address here.
STATUS
OUTPUT
WORD
see following
table
Status code
For meaning, refer to the table below.
Condition Codes
The following table shows the STATUS code that must be evaluated by the user
program.
Table 6-5
AG_UNLOCK Condition Codes
STATUS
Meaning
7000
CP is not processing a job
7001
FETCH active
7002
WRITE active
8183
FETCH/WRITE not configured for this connection
8186
ID number not in permitted range (e.g. 1...64 with S7-400 Industrial Ethernet CPs)
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6.5
FB55 IP_CONFIG for Programmed Communication
Connections
Meaning of the Block
Connections can be specified in a DB (configuration DB) and transferred to the CP
with an FB.
You can use this variant of programmed communication connections as an
alternative to connection configuration with STEP 7.
Depending on the size of the configuration DB, the data may be transferred to the
CP in several segments. This means that the FB must continue to be called until
the FB signals complete transfer by setting the DONE bit to 1.
Call
Representation ...
IP_CONFIG
INT
ACT
DONE
BOOL
WORD
LADDR
ERROR
BOOL
ANY
CONF_DB
STATUS
WORD
INT
LEN
EXT_STATUS
WORD
Example in STL representation
STL
call fb 55
ACT
:=
LADDR
:=
CONF_DB :=
LEN
:=
DONE
:=
ERROR
:=
STATUS :=
EXT_STATUS :=
Explanation
M 10.0
W#16#0100
P#db99.dbx10.0 byte 240
MW 14
M 10.1
M 10.2
MW 16
MW 18
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//IP_CONFIG block call
//Job triggered by memory bit<
//=LADDR 256 dec. in hardware configuration
//Data block with connection data
//Length info for connection data
//Executed code
//Error code
//Status code
//Cause of error in connection data
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How It Works
The following diagram illustrates the normal sequence of connection configuration
triggered by an IP_CONFIG in the user program.
The job executes as soon as the parameter ACT is transferred with value 1.
Due to the segmented transfer of the CONF_DB, you must repeat the job with
ACT = 1 until completion of the job is indicated in the parameters DONE, ERROR,
and STATUS.
If you want to transfer a connection configuration again later, the parameter ACT
must first be transferred with value 0 in at least one further call.
Please refer to the sample program in the appendix.
User program
(CPU cycle)
Ethernet CP
Supply CONF_DB with
data
Set ACT = 1
Call IP_CONFIG
Job active1)
S CP is supplied with system data
(including the IP address);
CONF_DB is
transferred in
segments.
S Connections are configured on the
CP.
Call IP_CONFIG
Job active1)
Call IP_CONFIG
Job completed without errors1)
Set ACT = 0
Time
Time
Legend:
1) parameter transfer DONE, ERROR, STATUS
Notice
The data transferred with the configuration DB are stored in volatile memory on
the CP and must be downloaded to the CP again following a power down!
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Explanation of the Formal Parameters
The following table explains the formal parameters for the call interface of the
IP_CONFIG function block :
Parameter Declaration
Type
ACT
BOOL
INPUT
Possible
Values
0,1
Remarks
When the FB is called with ACT = 1, the DBxx
is sent to the CP.
If the FB is called with ACT = 0, only the status
codes DONE, ERROR and STATUS are
updated.
LADDR
INPUT
WORD
Module base address
When you configure the CP with STEP 7
hardware configuration, the module base
address is displayed in the configuration table.
Specify this address here.
CONF_DB
INPUT
ANY
The parameter points to the start address of the
configuration data area in a data block
LEN
INPUT
INT
Length information in bytes for the configuration
data area.
DONE
OUTPUT
BOOL
0: –
1: new data
The parameter indicates whether the
configuration data area was completely
transferred.
Remember that it may be necessary to call the
FB several times depending on the size of the
configuration data area (in several cycles) until
the DONE parameter is set to 1 to signal
completion of the transfer.
For the meaning of this parameter in
conjunction with the ERROR and STATUS
parameters, refer to the following table.
ERROR
STATUS
OUTPUT
OUTPUT
EXT_Status OUTPUT
BOOL
WORD
WORD
0: –
1: error
Error code
see following
table
Status code
For the meaning of this parameter in
conjunction with the NDR and STATUS
parameters, refer to the following table.
For the meaning of this parameter in
conjunction with the NDR and ERROR
parameters, refer to the following table.
If an error occurs in the execution of a job, the
parameter indicates which parameter was
detected as the cause of the error in the
configuration DB.
High byte: Index of the parameter field
Low byte: Index of the subfield within the
parameter field
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Condition Codes
The following table shows the condition codes formed by the DONE, ERROR and
STATUS parameters that must be evaluated by the user program.
Table 6-6
Condition Codes for FB55 IP_CONFIG
DONE
ERROR
STATUS
Meaning
General codes relating to job execution
1
0
0000 H
Job completed without errors
0
0
8181H
Job active
Errors detected on the interface between CPU and CP.
0
1
80B1H
The amount of data to be sent exceeds the upper limit permitted for this
service. (upper limit = 16 Kbytes)
0
1
80C4H
Communication error
The error can occur temporarily; it is usually best to repeat the job in the
user program.
0
1
80D2H
Configuration error
The module you are using does not support this service.
Errors detected in the evaluation of the FB in the CPU or on the interface between CPU and CP.
0
1
8183H
The CP rejects the requested data record number.
0
1
8184H
System error or illegal parameter type<F 9>. (data type of the ANY
pointers CONF_DB not OK)
0
1
8185H
The value of the LEN parameter is larger than the CONF_DB less the
reserved header (4 bytes) or the length information is incorrect.
0
1
8186H
Illegal parameter detected
(Currently only the byte data type is accepted)
The ANY pointer CONF_DB does not point to a data block.
0
1
8187H
Illegal status of the FB
Data in the header of CONF_DB was possibly overwritten.
or:
The instance DB does not exist.
Further errors detected on the interface between the CPU and CP.
0
1
8A01H
The status code in the data record is invalid (value is >= 3).
0
1
8A02H
There is no job running on the CP; the FB, however, expected an
acknowledgment for a completed job.
0
1
8A03H
There is no job running on the CP and the CP is not ready; the FB
triggered the first job to read a data record.
0
1
8A04H
There is no job running on the CP and the CP is not ready; the FB
nevertheless expected an acknowledgment for a completed job.
0
1
8A05H
There is a job running, but there was no acknowledgment; the FB
nevertheless triggered the first job for a read data record job.
0
1
8A06H
A job is complete but the FB nevertheless triggered the first job for a
read data record job.
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Table 6-6
Condition Codes for FB55 IP_CONFIG, continued
DONE
ERROR
STATUS
Meaning
Errors detected when evaluating the FB on the CP.
0
1
8B01H
Communication error
The DB could not be transferred
0
1
8B02H
Parameter error
Double parameter field
0
1
8B03H
Parameter error
The subfield in the parameter field is not permitted.
0
1
8B04H
Parameter error
The length specified in the FB does not match the length of the
parameter fields / subfields.
0
1
8B05H
Parameter error
The length of the parameter field is invalid.
0
1
8B06H
Parameter error
The length of the subfield is invalid.
0
1
8B07H
Parameter error
The ID of the parameter field is invalid.
0
1
8B08H
Parameter error
The ID of the subfield is invalid.
0
1
8B09H
System error
The connection does not exist
0
1
8B0AH
0
1
8B0BH
Data error
The content of the subfield is not correct.
Structure error
A subfield exists twice.
0
1
8B0CH
0
1
8B0DH
0
1
8B0EH
0
1
8B0FH
Data error
The parameter does not contain all the necessary parameters.
Data error
The CONF_DB does not contain a parameter field for system data.
Data error / structure error
The CONF_DB type is invalid.
System error
The CP does not have enough resources to process CONF_DB
completely.
0
1
8B10
0
1
8B11
0
1
8B12
Data error
Configuration by the user program is not set.
Data error
The specified type of the parameter field is invalid.
Data error
Too many connections were specified (either in total or too many for a
specific type; for example, only one E-mail connection is possible).
0
1
8B13
CP-internal error
Further errors detected on the program interfaces within the CPU (SFC errors).
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Table 6-6
Condition Codes for FB55 IP_CONFIG, continued
DONE
ERROR
STATUS
Meaning
0
1
8F22H
Area length error reading a parameter (e.g. DB too short).
0
1
8F23H
Area length error writing a parameter (e.g. DB too short).
0
1
8F24H
Area error reading a parameter.
0
1
8F25H
Area error writing a parameter.
0
1
8F28H
Alignment error reading a parameter.
0
1
8F29H
Alignment error writing a parameter.
0
1
8F30H
The parameter is in the write-protected first current data block.
0
1
8F31H
The parameter is in the write-protected second current data block.
0
1
8F32H
The parameter contains a DB number that is too high.
0
1
8F33H
DB number error
0
1
8F3AH
The target area was not loaded (DB).
0
1
8F42H
Timeout reading a parameter from the I/O area.
0
1
8F43H
Timeout writing a parameter to the I/O area.
0
1
8F44H
Address of the parameter to be read is disabled in the access track.
0
1
8F45H
Address of the parameter to be written is disabled in the access track.
0
1
8F7FH
Internal error
For example, an illegal ANY reference was detected.
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6.6
Numeric Data / Resource Requirements of the FCs
Notice
Please note the version information of the blocks. Blocks with other versions have
different resource requirements.
Table 6-7
Information for FCs with an S7-400
NAME
Version
FC no.
Load
memory
bytes
Work
memory
bytes
MC7
Local data
Bytes
Bytes
AG_SEND
1.1
5
732
576
540
20
AG_RECV
1.1
6
656
522
486
20
AG_LOCK
1.0
7
272
200
164
6
AG_UNLOCK
1.0
8
256
186
150
6
AG_LSEND
3.0
50
1044
846
810
52
AG_LRECV
3.0
60
1190
992
956
58
Load
memory
bytes
Work
memory
bytes
MC7
Local data
Bytes
Bytes
Table 6-8
Information for FCs / FBs with an S7-300
NAME
Version
FC no.
AG_SEND
4.1
5
1916
1610
1574
50
AG_RECV
4.5
6
1408
1174
1138
40
AG_LOCK
4.0
7
748
636
600
34
AG_UNLOCK
4.0
8
712
604
568
32
IP_CONFIG
1.0
55
2062
1694
1648
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NCM S7 Diagnostics
7
The NCM S7 Diagnostics described here provides dynamic information on the
operating state of the communication functions of online CPs.
This chapter provides a general overview of the individual diagnostic functions.
The following checklist will help you to recognize several typical problems and their
possible causes and shows how you can use the NCM S7 for PROFIBUS
diagnostics tool to remedy the situation.
Further information is available from the following sources:
S
When you are working with the diagnostic tool, the integrated help system
provides you with context-related support.
S
You will find detailed information on working with STEP 7 programs in the Help
on STEP 7, which includes the topic “Diagnosing Hardware”
Note
NCM S7 Diagnostics supports not only diagnostics for CPs (communication
modules) but also other module types such as the IE/PB Link. In this chapter, the
term CP is therefore synonymous with all modules with which you can run NCM
S7 diagnostic functions.
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NCM S7 Diagnostics
7.1
Overview
Diagnostic Options in STEP 7
STEP 7 provides you with a graded concept allowing you to query information
about the status of your SIMATIC S7 components and functions and to sort out
problems in a variety of different situations. These options cover the following:
S
Hardware Diagnostics and Troubleshooting with STEP 7
Hardware diagnostics provides dynamic information on the operating mode of
modules including CPs when the S7 station is online.
You can recognize the existence of diagnostic information for a module by the
diagnostics icon in the project window of the SIMATIC Manager. Diagnostic
icons show the status of the corresponding module and also the operating
mode of CPUs.
Detailed diagnostic information is displayed in the “module information” that you
can open by double-clicking a diagnostic icon in the quick view or the diagnostic
view.
S
Communication Diagnostics with NCM S7 Diagnostics
The NCM S7 Diagnostics described here provides dynamic information on the
operating state of the communication functions of online CPs or modules.
S
HW Config Provides Static Information
Static information means the configured communication properties of an online
or offline CP and you can display this at any time using the hardware
configuration shown by HW Config.
What You Should Already Know
You should be familiar with the basic information in Chapter 2 on the significance of
NCM 7 and working with it. This means that you know how to connect the Ethernet
CP to the PG and how to control the module using the PG.
Where to Find Further Information
Further information is available from the following sources:
206
S
Information about the communication services is available in the appropriate
chapters in this manual.
S
When you are working with the diagnostic tool, the integrated help system
provides you with context-related support.
S
You will find detailed information on working with STEP 7 programs in the Help
on STEP 7, which includes the topic “Diagnosing Hardware”.
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7.2
Functions of NCM S7 Diagnostics
Functions
The diagnostic functions can be grouped as follows:
S
General diagnostic and statistical functions
S
Type and mode-dependent diagnostic functions
General diagnostic and statistical functions
Regardless of the configured mode of the Ethernet CP, the following diagnostic
functions are possible:
S
Querying the operating mode on Ethernet
S
Querying the event messages recorded on the Ethernet CP (diagnostic buffer)
Mode-Dependent Functions
Depending on the configured mode of the Ethernet CP, the following diagnostic
functions are possible:
S
Diagnostics of ISO transport connections
S
Diagnostics of ISO-on-TCP connections
S
Diagnostics of TCP connections
S
Diagnostics of UDP connections
S
Diagnostics of E-mail connections
S
Diagnostics of TCP connections for PROFInet
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7.2.1
Installing and Starting NCM S7 Diagnostics
Installation
NCM S7 Diagnostics is an integrated component of the NCM S7 for Industrial
Ethernet optional package.
NCM S7 Ethernet Diagnostics is installed along with NCM S7 for Ethernet on your
PG.
There are several ways in which you can start the diagnostic tool:
Alternative 1
S From the standard Start menu of Windows (program group SIMATIC"... "NCM).
Alternative 2
S From the Properties dialog of the CP within
your STEP 7 project.
Use this method if the STEP 7 project
in which the CP was configured is not
available on your PG (for service purposes).
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Structure
In the same way, for example, as the SIMATIC Manager, NCM S7 Diagnostics
appears as a separate two-part application window with a menu and toolbar:
Navigation area with
diagnostic objects
Content area with the
diagnostic result
S
In the navigation area on the left-hand side, you will find the hierarchically
arranged diagnostic objects.
You have an overview of the available diagnostic functions at all times. The
object structure displayed in the navigation area is adapted to the type of CP
you are currently checking and the functions and connections configured for the
CP.
S
In the content area, on the right-hand side, you will see the result of the
diagnostic function you selected in the navigation area.
S
By selecting a diagnostic object in the navigation area with the mouse, you
execute the diagnostic function.
S
Using the menu bar and toolbar, you control the sequence of the diagnostics
with context-sensitive menu commands.
Operation
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7.2.2
General Menu Commands
Overview
When running diagnostic functions, the following menu commands have general
significance. Depending on the context, other functions may be available; for more
detailed information refer to the online help for NCM Diagnostics.
Table 7-1
Meaning of the Menu Commands
Menu
Meaning
Diagnostics"
Open Online Connection...
With this menu command, you can establish a connection to a different CP
you want to check without having to quit and restart the diagnostic tool. The
current diagnostic connection is closed.
Diagnostics"
Close Online Connection...
If you want to use more than one diagnostic connection at the same time,
you can start NCM S7 diagnostics more than once.
Operating Mode"
You can control the CP as follows:
Stop a module
Stops the CP.
Start a module
Starts the CP if the RUN/STOP switch is set to RUN.
Reset module memory
With certain CP types, for example the CP 443-1, you can reset the CP
memory. This function must be confirmed before it is executed.
Following this memory reset, the CP retains the preset MAC address and
the retentive parameters. The CP is therefore immediately ready for
downloads.
The retentive parameters include:
S IP address and IP parameters
S A newly set MAC address
S LAN settings
Resetting to factory
settings
With some modules, it is possible to reset to the factory settings.
View " Update
Each time you activate this menu command, the displayed diagnostic and
status information is updated once.
View "
Update Cyclically
Using this menu command, you activate and deactivate the automatic
(cyclic off) updating of the displayed diagnostic and status information.
When you reset to the factory settings, the retentive parameters are also
deleted. After this, the module retains only the factory-set MAC address (as
shipped).
You can set the interval between update points with the menu command
Options " Customize.
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Table 7-1
Meaning of the Menu Commands
Menu
"
Options Customize
Meaning
With this menu command, you set the general parameters for the diagnostic
session.
On Ethernet:
S Dialog update time
This sets the interval at which the diagnostic data are updated in a
contents area when cyclic updating is selected.
Help"
You can obtain help about the current diagnostic function As an alternative,
you can also press the F1 key.
Remember that you can also call up context-related help for some of the
diagnostic functions. To obtain help, position the cursor on the output field
and press the F1 key.
Note
If the connection to the CP is terminated during the diagnostic session, the
following message is displayed: “The online connection was terminated”.
You can reestablish the connection to the CP with the corresponding
acknowledgment in the dialog. The connection is then automatically reestablished
whenever possible.
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7.3
7.3.1
Starting Diagnostics
Establishing a Connection to the Ethernet CP
Initial Situation
Establish the physical connection between the PG and the SIMATIC S7 Station.
There are two ways of doing this:
S
MPI
S
Industrial Ethernet (ISO protocol)
S
Industrial Ethernet TCP/IP (IP protocol)
S
PROFIBUS
Ways of Starting Diagnostics
You can start NCM Diagnostics from the following STEP 7 functions or dialogs:
S
CP properties dialog
S
Windows Start menu
S
Connections properties dialog (NetPro)
S
Hardware configuration HW Config
These possibilities are described below.
7.3.2
Starting Diagnostics from the CP Properties Dialog
If the project data are available on your PG/PC, follow the steps outlined below:
1. Select the S7 station in the project and open the hardware configuration (HW
Config).
2. Select the CP and open the Properties dialog.
3. Select the “Diagnostics” dialog.
4. Select the “Run” button.
Result:
NCM S7 Diagnostics is opened. The path is set automatically to match the current
connection in STEP 7.
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7.3.3
Starting Diagnostics from the Windows Start Menu
If there are no configuration data on your PG/PC, follow the steps outlined below to
start diagnostics with a connected CP:
1. Open the Windows Start menu and select the command SIMATIC
Diagnostics
"
STEP 7 "
NCM S7 Diagnostics is started with the message “No online connection to the
CP” in the contents area.
2. In the displayed dialog “NCM S7 Diagnostics”, select the interface to match
your hardware configuration.
Depending on the type of network attachment you have, you will be prompted
to specify an address:
Table 7-2
Possible Settings for the Online Paths – without Parameters for Internetworking
Node Address
Attachment on
Destination Station
MPI
Location of the Module
Rack / Slot
MPI address of the CP if this has its
own MPI address.
Rack/slot no. of the CP to be
checked.
Otherwise specify the MPI address of
the CPU.
If you specify the MPI address of the
CP, you can simply use the default
setting “0/0”.
With this setting, the CP whose
address was specified as the node
address is accessed.
PROFIBUS
PROFIBUS address of the
PROFIBUS CP via which the S7
station is reached.
Rack/slot no. of the CP to be
checked.
Industrial Ethernet
MAC address of the Ethernet CP via
which the S7 station is reached.
Rack/slot no. of the CP to be
checked.
Entered in hexadecimal.
If you specify “0/0”, the CP specified
with the node address is accessed
directly.
IP address of the Industrial Ethernet
CP via which the S7 station is
reached.
Rack/slot no. of the CP to be
checked.
Industrial Ethernet
TCP/IP
Entered in decimal.
Example:
IP address decimal 142.120.9.134
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If you specify “0/0”, the CP specified
with the node address is accessed
directly.
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Examples of an Online Path without Gateway
Rack / slot : 0/4
PG/PC
S7 – 300
CP
U
CP
Node address (MAC):
08-00-06-01-02-03
Attachment of target
station: Industrial Ethernet
Figure 7-1
CP requiring diagnostics can be reached directly
Rack / slot : 0/5
PG/PC
S7 – 300
CP
U
C
P
C
P
Node address (MAC):
08-00-06-01-02-03
Attachment of target
station: Industrial Ethernet
Figure 7-2
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Network 2
The CP requiring diagnostics is accessible indirectly over another CP
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7.3.4
Using a Gateway
Case a: One gateway
If the CP you want to check with diagnostic functions can only be reached via a
gateway, you must select the device and specify its node address in the local
network.
You must also specify the S7 subnet ID of the destination network:
The subnet ID consists of two numbers separated by a dash:
– One number for the project
– One number for the subnet
You will find the subnet ID in the object properties of the subnet in the STEP 7
project. The subnet ID is also printed out with the network configuration.
Node address (gateway) (MAC):
08-00-06-01-02-03
PG/PC
Rack / slot : 0/5
S7 – 300
CP
U
C
P
C
P
S7 – 300
CP
U
C
P
Node address: PROFIBUS address 9
Attachment of gateway:
Industrial Ethernet
Attachment of target station : MPI/PROFIBUS/AUTO
S7 subnet ID of target network:
0001 0001
Figure 7-3
Example of the Parameter Settings for the Online Path with one Gateway
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NCM S7 Diagnostics
Case b: Several Gateways
If the CP requiring diagnostics can only be reached over several gateways, you
only specify the first gateway.
Routing over the other gateways is done automatically.
Node address (gateway) (MAC):
08-00-06-01-02-03
PG/PC
S7 – 300
CP
U
C
P
C
P
Rack / slot : 0/5
Attachment of gateway:
Industrial Ethernet
S7 – 300
CP
U
Routing over other
gateways is done
automatically !
C
P
Node address:
PROFIBUS address 9
Attachment of target
station: MPI/PROFIBUS/AUTO
S7 subnet ID of target network:
0001 0001
Figure 7-4
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Example of the Parameter Settings for the Online Path with Several Gateways
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7.3.5
Using the PC Station – Setting a Gateway with “PC internal”
There is a special situation when you use your PC/PG as a PC station and have
therefore set the interface to PC internal (local) in “Setting the PG/PC Interface”.
You must them set parameter values for the gateway, even when you do not need
to go through any other gateway to reach the target station.
Select the following settings:
S
Gateway attachment: MPI/PROFIBUS/AUTO
S
Node address (gateway)
Enter the index of the module here.
The index is the virtual slot address of the component (can be displayed using
the Station Configuration Editor). The index is identical to the slot number
selected during configuration of the PC station in STEP 7 HW Config!
S
S7 subnet ID of destination network:
Follow the same steps as described for setting the gateway.
Tip:
You do not need to make these settings for the gateway if you select one of the
following options:
S
Start NCM Diagnostics from the Properties dialog of the CP.
S
When setting up your module, do not select the interface as PC internal (local)
in “Set PG/PC Interface”.
Node address (gateway) : 2
(here, the index of the module!)
Rack / slot : 0/4
PC station
S7 – 300
OPC
serv
er
CP
U
CP
CP
Gateway attachment:
MPI/PROFIBUS/AUTO
Node address: PROFIBUS
address 12
Attachment of target
station : MPI/PROFIBUS/AUTO
S7 subnet ID of target network:
0001 0001
Figure 7-5
Example of Settings with “PC internal”
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7.3.6
Other Ways of Starting Diagnostics
Starting in the properties dialog of the connections:
1. Select the PLC"Activate Connection Status menu command to activate
online access.
2. Select the “Special Diagnostics” button in the “Status Information” tab.
Starting in the hardware configuration tool HW Config:
1. With the S7 station online, select the PLC"Module Status menu command;
2. Select the “Special Diagnostics” button in the dialog that is opened.
Note
To operate several diagnostic connections at the same time, you can start NCM
S7 Diagnostics more than once.
You can also start NCM S7 Diagnostics twice with an online connection to the
same CP; this can, for example, be useful if you want to monitor the diagnostic
buffer at the same time as running diagnostic functions on a connection.
Requirement: You have an online connection available via the LAN (ISO or
TCP/IP) on the one hand and an online connection via the communication (K) bus
on the other (alternatively via the CPU or via PG channel routing via a further CP).
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7.4
How to Use Diagnostics
Procedure
To use diagnostics efficiently, particularly when working with the diagnostic tool for
the first time, the following procedure can be recommended.
1. Use the sequence shown below as a basis for using diagnostics:
Start NCM S7 Diagnostics:
– Establish the connection to the CP (Section 7.3
– Set the options (Section 7.2.2)
– Identify the Ethernet CP
Query the current status of the CP
“Operating Mode” diagnostic object
If the CP is not
in the RUN mode
If the CP is in the RUN mode
TCP connections
ISO transport connections/
ISO-on-TCP connections
UDP connections
If anything unusual is displayed for
– connection status
– receive status,
– send status
View / evaluate the diagnostic buffer to obtain an overview
and detailed explanation of diagnostic events.
If necessary, correct configuration or programming.
2. Clarify your problem or task using the check list in Section 7.6 and select the
diagnostic function based on the recommendation there.
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NCM S7 Diagnostics
7.5
Starting Diagnostic Functions Explicitly
The following table shows the diagnostic options that exist in the available
functions.
Table 7-3
General Diagnostic and Statistical Functions
Diagnostic
Functions /
Diagnostic Object
Diagnostic Aims
CP information
The aim is to identify the CP to which
NCM S7 Diagnostics is connected and
to find out the current mode.
Mode
Here, the aim is to find out the current
operating mode of the Ethernet CP as a
module in the S7-300/400 and as a node
on Industrial Ethernet and, if necessary,
to modify the mode (menu command
Operating Mode"Stop Module / Start
Module / Reset Memory / Reset to
Factory Settings).
Diagnostic buffer
General error diagnostics using
diagnostic buffers
To display and decode event messages
recorded on the CP in detail. The
diagnostic buffer provides you with
detailed information about all the
communication services of the CP.
Special Features
Event messages are recorded on the CP
in a ring buffer. The ring buffer can
contain up to 50 entries.
In NCM S7, on the other hand, up to 500
messages can be saved!
All the CP functions can generate event
messages. When you call the diagnostic
object, the messages are read out and
displayed. The latest message is
displayed in the top line with the highest
consecutive number.
If you double-click a previously selected
event message, you display a help text
explaining the message in greater detail.
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Table 7-4
Mode-Dependent Functions
Diagnostic Aims
Diagnostic
Functions /
Diagnostic Object
Special Features
To display and monitor communication connections. You obtain an overview or detailed information in the
contents area depending on the diagnostic object you select.
Connections
S Overview of All Connection Types
Used
Connections "
Type
By double-clicking the objects in the
contents area, you can display detailed
information.
S Overview of all the communication
connections of a particular type, for
example all TCP connections;
S Information on the connection status
Connections "
Type "
Type-connection-n
S Detailed information about the status
of a communication connection.
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7.6
Checklist for “Typical Problems” in a System
Meaning
The following lists contain several typical problems and their possible causes and
how you can use the NCM S7 Ethernet Diagnostics tool to remedy the situation.
The checklists deal with the following topics:
1. Checklist for General CP Functions
2. Communication Connections Checklist
Note
In the column “Identifying the Cause and Remedy”, you will see the diagnostic
function recommended for dealing with the problem shown in bold face.
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7.6.1
Checklist for General CP Functions
Table 7-5
Checklist for Typical Problems When Operating a CP in a System
Problem
The Ethernet CP will not
change to the RUN mode.
Possible Cause
Invalid configuration
loaded on the Ethernet
CP.
Identifying the Cause and Remedy
Yellow STOP LED and red SF LED lit
continuously.
Call up the diagnostic buffer in NCM S7
Ethernet Diagnostics.
Example of an entry
CP STOP due to invalid CP parameter
assignment
What to do:
Correct the configuration of the Ethernet CP.
Switch set to STOP on the Query the operating mode in NCM S7
Ethernet CP.
Diagnostics.
Operating mode: STOP, Cause: switch set to
STOP
What to do:
Change the switch to RUN on the Ethernet CP
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NCM S7 Diagnostics
7.6.2
Communication Connections Checklist
Table 7-6
Checklist for Typical Problems with ISO Transport / ISO-on-TCP / UDP Connections
Problem
Possible Cause
No data transfer on an
ISO transport connection
/
ISO-on-TCP connection
or only in one direction.
AG-SEND and AG-RECV
are not called in the user
program.
or
Identifying the Cause and Remedy
Check the user program.
Evaluate status bytes in AG-SEND and
AG-RECV.
What to do:
Receive or send buffer too If necessary, configure FC blocks.
small or incorrect.
If necessary, correct ANY pointer.
The connection is not
established.
Evaluate status bytes of the FC blocks or
evaluate diagnostic buffer.
What to do:
Change the address parameters (MAC/IP
address, TSAP).
Data transfer too slow
Receiving device too slow
Evaluate diagnostic buffer.
Entry: “No receive resources on destination
station XX”.
What to do:
Delay the send trigger or check the destination
station and optimize reception.
The complete data field
is not sent on an ISO
transport /
ISO-on-TCP/UDP
connection.
LEN parameter for
AG-SEND is set to the
wrong value.
What to do:
Set the LEN parameter to the required size.
The complete data field
is not sent on an ISO
transport /
ISO-on-TCP/UDP
connection.
The buffer specified with
the ANY pointer is too
small.
What to do:
Correct the LEN parameter and the ANY pointer.
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Firmware Loader
8
This chapter will familiarize you with the uses and handling of the Firmware
Loader.
The Firmware Loader allows you to download more recent firmware versions to the
SIMATIC NET modules.
For more detailed information on the various load options, refer to the integrated
help.
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Firmware Loader
8.1
Application
Firmware
Here, firmware means the system programs in the SIMATIC NET modules.
Uses of the Firmware Loader
The Firmware Loader allows you to download more recent firmware versions to the
SIMATIC NET modules. It is used on the following:
S
PROFIBUS modules
S
Industrial Ethernet modules
S
Modules for Gateways (for example, IE/PB Link)
Installation
The firmware loader is available when you have installed NCM S7 on your PG/PC.
Load Files
The Firmware Loader supports the following file types:
S
<file>.FWL
A file form that contains information that can be displayed in the dialogs of the
Firmware Loader in addition to the LAD file form.
S
<file>.LAD
A file format containing only the system program that can be downloaded to the
module.
For detailed information, read the documentation, for example, the README file
shipped with the load file.
This information is displayed even after reading in the FWL file into the firmware
loader.
Working with the Firmware Loader
Depending on the module type, the downloading is prepared and executed in three
or four steps.
For more detailed information, refer to the next section and the dialog boxes
themselves.
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8.2
Loading Firmware
Starting the Download
Open the Windows Start menu and select the menu command SIMATIC
" NCM S7 Industrial Ethernet " Firmware Loader.
"
STEP 7
Select the Next button and follow the instructions displayed in the dialog box.
!
!
Caution
Make sure that the load file you are using is intended as an update for the version
of the firmware contained on your module. If you are in any doubt, contact your
local Siemens advisor.
Caution
Remember that interrupting the download can lead to an inconsistent state on the
module!
For more detailed information on the various load options, refer to the integrated
help.
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References
A
/1/
Product information bulletin / manual SIMATIC NET CP
Supplied with the specific CP
Siemens AG
/2/
NCM S7 for PROFIBUS Primer
Part
– of the documentation package NCM S7 for PROFIBUS
– of the online documentation in the STEP 7 optional package NCM S7 for
PROFIBUS
SIEMENS AG
/3/
NCM S7 for Industrial Ethernet Manual
Part
– of the documentation package NCM S7 for Industrial Ethernet
– of the online documentation in the STEP 7 optional package NCM S7 for
Industrial Ethernet
SIEMENS AG
/4/
SIMATIC NET , Manual
Commissioning PC Stations
Part
– of the documentation package NCM S7 for Industrial Ethernet
– of the online documentation in the STEP 7 optional package NCM S7 for
Industrial Ethernet
Siemens AG
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References
/5/
SIMATIC NET IT-CP, manual
Part
– of the documentation package NCM S7 for Industrial Ethernet
– of the online documentation in the STEP 7 optional package NCM S7 for
Industrial Ethernet
Siemens AG
/6/
SIMATIC STEP Configuring Hardware and Connections with STEP 7
Part of the standard STEP 7 Documentation Package
Part of the online documentation in STEP 7
SIEMENS AG
/7/
Communication with SIMATIC
Manual
SIEMENS AG
/8/
SIMATIC Programming with STEP 7
Part of the standard STEP 7 Documentation Package
Part of the online documentation in STEP 7
SIEMENS AG
/9/
SIMATIC STEP 7 Reference Manuals with manuals
– LAD / FBD / STL
– System Software for S7-300/400 System and Standard Functions
Part of the online documentation in STEP 7
Siemens AG
/10/
SIMATIC NET Industrial Twisted Pair Networks
SIEMENS AG
/11/
Ethernet, IEEE 802.3
(ISO 8802-3)
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References
/12/
SINEC CP 1413
Manuals for MS-DOS, Windows
SIEMENS AG
/13/
SIMATIC S7
S7-300 Programmable Controller
Hardware and Installation
Manual
SIEMENS AG
/14/
SIMATIC NET Manual for Triaxial Networks
SIEMENS AG
/15/
SIMATIC NET Ethernet Manual
SIEMENS AG
/16/
Lokale Netze –
Kommunikationsplattform der 90er Jahre
Andreas Zenk
Addison-Wesley
ISBN 3-89319-567-X
/17/
TCP/IP
Internet-Protokolle im professionellen Einsatz
Mathias Hein
International Thomson Publishing
ISBN 3-8266-400-4
ITP Online-Center: http://www.ora.de
/18/
RFC1006 (Request For Comment)
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References
/19/
RFC793 (TCP)
/20/
RFC791 (IP)
/21/
Berger, Hans
Automation with STEP 7
SIMATIC S7-300/400 Programmable Logic Controllers
/22/
For configuring PROFInet components and systems:
Basic help in the SIMATIC iMap engineering tool
/23/
For configuring PROFInet components and systems:
Component based Automation – Configuring Systems with SIMATIC iMap
Manual
/24/
SIMATIC S7
Programmable Controller
S7-400, M7-400
Hardware and Installation
Order Numbers
The order numbers for the SIEMENS documentation listed above can be found in
the catalogs “SIMATIC NET Industrial Communication, Catalog IK PI” and
“SIMATIC Programmable Controllers SIMATIC S7 / M7 / C7”.
You can obtain these catalogs and any further information you require from your
local SIEMENS office or national head office.
Some of the documents listed here are also on the Manual Collection CD supplied
with every S7-CP.
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Glossary
B
B.1
General Section . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
234
B.2
Industrial Ethernet . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
238
B.3
PROFInet . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
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Glossary
B.1
General Section
Baud rate
–> transmission rate
Broadcast
A broadcast is like ”calling all stations”: Using one broadcast frame, you can
reach all nodes that are prepared to accept broadcast frames.
Bus segment
Part of a –> subnet. Subnets can consist of bus segments and connectivity
devices such as repeaters and bridges. Segments are transparent for
addressing.
Client
A client is a device or, in general terms, an object that requests a service from a
–> server.
Configuration data
Parameters that determine the modes and functions of a –> CP. They are set
and downloaded using the NCM S7 configuration tool.
CP
Communications Processor. Module for communications tasks.
CSMA/CD
CSMA/CD (Carrier Sense Multiple Access with Collision Detection); a transmission technique.
Frame
A message from one PROFIBUS/Ethernet station/node to another.
Frame header
A frame header consists of an identifier for the –> frame and the source and destination address.
Frame trailer
A frame trailer consists of a checksum and the end identifier of the –> frame.
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Glossary
Functions (FCs)
STEP 7 code blocks of the type ”function”.
Gateway
Intelligent connectivity device that connects local area –> networks of different
types at the ISO Layer 7 level.
Industrial Ethernet
A LAN system complying with IEEE 802.3 (ISO 8802-2)
Multicast
A multicast is like ”calling all group stations”: Using one multicast frame, you can
reach all the nodes that belong to the multicast group and that are prepared to
receive frames.
NCM S7 for Industrial Ethernet
Configuration software for configuration and diagnostic functions on an Ethernet
CP.
NCM S7 for PROFIBUS
Configuration software for configuration and diagnostic functions on a PROFIBUS CP.
Network
A network consists of one or more interconnected –> subnets with any number
of –> nodes. Several networks can exist side by side.
PG operation
A mode of the PROFIBUS/Ethernet CP in which the SIMATIC S7-CPU is
programmed, configured or diagnosed over PROFIBUS/Ethernet. This mode is
handled by the S7 functions.
PROFInet
Standard of the PROFIBUS Users organization defining a heterogeneous
communications and engineering model.
Protocol
A set of rules for transferring data. Using these rules, both the formats of the
frames and the data flow are specified.
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Glossary
Process image
The process image is a special memory area in the programmable logic controller. At the start of the cyclic program, the signal states of the input modules are
transferred to the process input image. At the end of the cyclic program, the process output image is transferred as a signal state to the output modules.
Segment
Synonym for –> Bus segment.
Services
Services provided by a communication protocol.
Server
A server is a device, or in general terms, an object that provides certain services.
A service is started at the instigation of a –> client.
SIMATIC NET
Siemens SIMATIC Network and Communication. Product name for –> networks
and network components from Siemens. (previously SINEC)
SIMATIC NET Ind. Ethernet
SIMATIC NET LAN system for industrial applications based on Ethernet.
(previously SINEC H1)
SINEC
Previous product name for -> networks and network components from Siemens.
Now: SIMATIC NET
Station
A station is identified by a
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S
MAC address in the Ethernet network
S
PROFIBUS address in the PROFIBUS network
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Glossary
Subnet
A subnet is part of a –> network whose parameters (for example –> PROFIBUS)
must be matched. The subnet includes bus components and all the attached
stations. Subnets can, for example, be connected together by –> gateways to
form a network.
A –> system consists of several subnets with unique –> subnet numbers. A
subnet consists of several –> stations with unique –> PROFIBUS or MAC
addresses (Industrial Ethernet).
System
This means all the electrical equipment within a system. A system includes,
among other things, programmable logic controllers, devices for operation and
monitoring, bus systems, field devices, actuators, supply lines.
Transport layer
The transport layer is layer 4 of the ISO/OSI reference model for open system
interconnection. The purpose of the transport layer is to transfer data reliably
from device to device. Transport connections can be used for the transmission.
Transport interface
The transport interface of a SIMATIC S5 PLC is the access to the connectionoriented services of the transport layer on the CP. The transport interface presents itself to the control program in the form of handling blocks (HDBs).
TSAP
Transport Service Access Point
Transmission rate
According to DIN 44302, this is the number of binary decisions transmitted per
time unit. The unit is bps. The set or selected transmission rate depends on various conditions, for example the distance across the network.
Watchdog
Mechanism for monitoring operability.
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Glossary
B.2
Industrial Ethernet
Base address
Logical address of a module in S7 systems.
S
For PROFIBUS
The PROFIBUS base address is the address starting at which all addresses
that are calculated automatically in the project are assigned.
S
For Industrial Ethernet
The base MAC address is the address starting at which all addresses that are
calculated automatically in the project are assigned.
Ind. Ethernet station
A station is identified by a –> MAC address in –> Industrial Ethernet.
ISO-on-TCP
Transport layer connection (layer 4 communication complying with ISO)
simulated on TCP.
On an ISO-on-TCP connection, messages can be exchanged in both directions.
TCP provides the data flow communication without segmenting the data into
messages. ISO, on the other hand, is message-oriented. With ISO-on-TCP, this
mechanism is simulated on TCP. This is described in RFC1006 (Request For
Comment).
ISO-on-TCP connections allow program/event-controlled communication via
Ethernet from a SIMATIC S7 PLC to
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S
SIMATIC S7 PLC with Ethernet CP
S
SIMATIC S5 PLC with Ethernet CP
S
PC/PG with Ethernet CP
S
any system
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Glossary
ISO Transport Connection
Communication connection of the transport layer (with the CP/COM 143
previously S5S5 connection).
ISO transport connections allow program/event-controlled communication on
Industrial Ethernet between SIMATIC S7 PLCs and
S
SIMATIC S7 PLC with Ethernet CP
S
SIMATIC S5 with an Ethernet CP (e.g. CP 143 or CP 1430)
S
PC/PG with Ethernet CP (for example CP 1613)
S
Any system using the ISO transport protocol (ISO 8073)
The transfer of blocks of data on an ISO transport connection is bi-directional.
MAC address
Address to distinguish between different stations connected to a common transmission medium (Industrial Ethernet).
Media Access Control (MAC)
Mechanisms for controlling access by a station to a common transmission medium shared with other stations.
RFC1006
see ISO-on-TCP
S5S5 connection
see ISO transport connection
Subnet mask
The subnet mask specifies which parts of an IP address are assigned to the network number. The bits in the IP address whose corresponding bits in the subnet
mask have the value 1 are assigned to the network number.
Subnet number
A –> system consists of several –> subnets with unique subnet numbers.
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Glossary
TCP/IP
TCP = Transport Connection Protocol; IP = Internet Protocol
UDP
User Datagram Protocol. User Datagram Protocol: datagram service for simple
internetwork transmission without acknowledgment.
B.3
PROFInet
Component based Automation
Concept for implementing modular, distributed automation applications on the
basis of open standards and data communication.
Component based Automation is an expansion of Totally Integrated Automation
(TIA).
Device
In Component based Automation: part of the PROFInet component that contains
the hardware-specific data of the PROFInet component. In SIMATIC iMap, a
device is the software representation of the physical device for which the
PROFInet component was created. It is displayed in the network view of
SIMATIC iMap as an object with one or more bus attachments. The following
distinction is made according to the communication functionality: –> PROFInet
devices and –> PROFIBUS devices.
Interconnection
General: Logical data connection between two objects. In SIMATIC iMap:
Connection between two technological functions. An output is interconnected
with an input of the same type. Interconnections are represented in SIMATIC
iMap by lines.
Network view
View of the devices and the networks (Ethernet, PROFIBUS) in SIMATIC iMap.
Plant view
View of the technological functions of the automation system and its
interconnections in SIMATIC iMap. One chart is displayed in the plant view.
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Glossary
PROFIBUS device
In Component based Automation: A PROFIBUS device has only one PROFIBUS
attachment as a slave. It does not take part directly in PROFInet communication
but is linked using a proxy PROFInet device.
PROFInet
Standard of the PROFIBUS Users organization defining a heterogeneous
communications and engineering model.
PROFInet device
A device on Ethernet is a PROFInet device. A PROFInet device can also have a
PROFIBUS attachment as master and proxy PROFInet device for PROFIBUS
devices.
PROFInet component
Software representation of a technological module with defined functionality. An
automation system is made up of several PROFInet components.
A PROFInet component always includes a technological function and the
corresponding device.
PROFInet device, proxy
A PROFInet device that has the role of the master for PROFIBUS devices. This
allows PROFIBUS slaves to be included in PROFInet communication.
SIMATIC IMap
Engineering tool from Siemens for Component based Automation. Allows the
configuration, commissioning, and monitoring of modular, distributed automation
systems based on the PROFInet standard.
SIMATIC iMap – STEP 7 AddOn
Software for the SIMATIC iMap interface to STEP 7.
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-
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Linking to Other Systems with
FETCH/WRITE
C
The FETCH and WRITE modes supported on ISO transport connections, TCP,
and ISO-on-TCP connections can be used with any other device to access the S7
system memory areas.
To be able to use this type of access, for example for PC applications, you need to
know the PDU structure of the jobs. The required S7 or S5 header for request and
response frames are 16 bytes long and their structure is described in this chapter.
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a) Structure of WRITE Frames
The meaning and values of parameters shown without values in the following table
can be found in the section “Parameter Values“.
WRITE request frame
WRITE acknowledgment frame
0 System ID
=”S”
0 System ID
=”S”
1
=”5”
1
=”5”
2 Length of header
=16d.
2 Length of header
=16d.
3 ID OP code
=01
3 ID OP code
=01
4 Length OP code
=03
4 Length OP code
=03
5 OP code
=03
5 OP code
=04
6 ORG field
=03
6 Ack field
=0Fh
7 Length ORG field
=08
7 Length ack field
=03
8 ORG ID
8 Error field
=No
9 DBNR
9 Empty field
=FFh
=07
A Start address
High Byte
A Length empty field
B
Low Byte
B
C Length
High Byte
C
D
Low Byte
D
E Empty field
=FFh.
E
F Length empty field
=02
F
free
Data up to 64 K
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a) Structure of FETCH Frames
The meaning and values of parameters shown without values in the following table
can be found in the section “Parameter Values“.
FETCH request frame
FETCH response frame
0 System ID
=”S”
0 System ID
=”S”
1
=”5”
1
=”5”
2 Length of header
=16d.
2 Length of header
=16d.
3 ID OP code
=01
3 ID OP code
=01
4 Length OP code
=03
4 Length OP code
=03
5 OP code
=05
5 OP code
=06
6 ORG field
=03
6 Ack field
=0Fh
7 Length ORG field
=08
7 Length ack field
=03
8 ORG ID
8 Error field
=No
9 DBNR
9 Empty field
=FFh
=07
A Start address
High Byte
A Length empty field
B
Low Byte
B
C Length
High Byte
C
D
Low Byte
D
E Empty field
=FFh.
E
F Length empty field
=02
F
free
Data up to 64 K but
only if Error no. =0
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Parameter Values
S7 Address Area
ORG ID
246
DB
M
I
Q
01H
02H
03H
04H
Source/dest.
data from/to
data block in
main memory
Source/dest.
data from/to
flag area
Source/dest.
data from/to
process
image of the
inputs (PII)
Source/dest.
data from/to
process
image of the
outputs (PIQ)
DBNR
DB, from
which the
source data
are taken or
to which the
dest data are
transferred
irrelevant
irrelevant
irrelevant
permitted range
1...255
Start address
DW number,
from which
the data are
taken or
written to
Flag byte no.,
from which
the data are
taken or
written to
Input byte no.,
from which
the data are
taken or
written to
Output byte
no., from
which the
data are
taken or
written to
permitted range
0...2047
0...255
0...127
0...127
Length
Length of the
source/dest.
data field in
words
Length of the
source/dest.
data field in
bytes
Length of the
source/dest.
data field in
bytes
Length of the
source/dest.
data field in
bytes
permitted range
1...2048
1...256
1...128
1...128
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S7
PI/PQ
C
T
Address Area
ORG ID
05H
06H
07H
Source/dest.
data from/to in
I/O modules.
With source
data input
modules, with
dest data
output modules
Source/dest
data from/to
counter cells
Source/dest
data from/to
timer cells
DBNR
irrelevant
irrelevant
irrelevant
Start address
I/O byte no.,
from which the
data are taken
or written to
Number of the
counter cell
from which the
data are taken
or written to
Number of the
timer cell from
which the data
are taken or
written to
permitted range
0...127
0...255
0...255
digital I/Os
128...255
analog I/Os
Length
Length of the
source/dest.
data field in
bytes
Length of the
source/dest.
data field in
words (counter
cell = 1 word)
Length of the
source/dest.
data field in
words (counter
cell = 1 word)
permitted range
1...256
1
1
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Document History
D
This section provides an overview of the previous releases of this manual and the
functional expansions in STEP 7 and NCM S7.
New in release 06 / STEP 7 V5.2
S
S7 communication over routers (single-ended client and server functionality) via
an IE/PB Link or CP.
S
Multiprojects
With the new multiproject functionality, projects can be split up and distributed
for engineering and then merged again.
New in Release 05 / STEP 7 V5.1 SP3
S
Configuring multicast and broadcast on UDP connections.
See Chapter LEERER MERKER.
S
The blocks AG_SEND and AG_RECV can now be used for “long data packets”
with an S7–300. See Chapter 6
S
The S7 CPs for Ind. Ethernet are now supplied with a default MAC address
allowing configuration data to be downloaded over Ethernet without a “node
initialization”.
New in Release 04 / up to STEP 7 V5.1 SP2
S
The FETCH/WRITE mode is now supported on TCP connections. See
Chapter 4.
S
The FETCH/WRITE mode can be coordinated in the user program by the new
FCs AG_LOCK and AG_UNLOCK. See Chapter 6
S
NCM Diagnostics has a completely revised user interface. See Chapter 7.
The description of NCM S7 Diagnostics has been restructured. While this
manual provides you with an overview and checklists, the online help provides
you with detailed information on the diagnostic events.
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A
Access coordination, 191
CONF_DB, 198
Address parameters
Broadcast, 136
broadcast, 135
unspecified ISO-on-TCP connection, 117
unspecified TCP connection, 125
unspecified UDP connection, 132
AS-interface, 16
Ethernet CP
further CP properties, 57
time, 58
installing and starting, 45
procedure, 47
F
FB, 164
CP_CONFIG, 146
IP_CONFIG, 197
FCs
block number, 164
B
for configured connections, 170
Broadcast, with UDP, 133
general notes, 164
FCs for access coordination with
FETCH/WRITE, 191
C
FETCH/WRITE services
Communication options, 17
configuration for ISO transport, 139
Communication services, configuring, 68
overview, 32
Configuration data, download to target system, Firmware Loader, 225
74
application, 226
Configuration data block, 146, 149
loading firmware, 227
Connection, properties, 91
FTP connection, Parameter field for, 158
Functions
Connection configuration, 89
AG-RECV, 78, 79
Connection ID, 152
AG-SEND, 78, 79
range of values, 152
Connection types, parameter fields for, 152
Functions (FC), typical sequence, 80
CP address, 164
Functions (FCs)
AG_LOCK, 193
CP configuration data, saving, 75
AG_LOCK / AG_UNLOCK, 191
Creating a subnet, 48
AG_RECV / AG_LRECV, 184
CSMA/CD, 16
AG_SEND / AG_LSEND, 174
AG_UNLOCK, 195
Further functions, 99
D
DHCP server, 63
Displaying network attachments, 55
Downloading, 74
Dynamic properties, 109
H
E
I
E-mail connection, Parameter field for, 156
Ethernet, overview, 16
Industrial Ethernet, overview, 16
Industrial Ethernet; user interface to, 25
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Hardware configuration, Ethernet CP, 51
Index-1
IP access control list, 62
IP access protection, 62
IP address
in the ”Properties – Ethernet Interface”
dialog, 63
obtaining from a DHCP server, 63
setting in the user program, 63
IP address assignment over DHCP, 97
IP configuration, 63
ISO transport connection, 103
amount of data and number of connections,
91
checking, 111
connection without assignment, 100
dynamic properties, 109
printing configured connections, 99
properties dialog, 103
addresses, 107
dynamics, 109
general, 104
overview, 111
save connection, 99
Unspecified connection, 108
ISO-on-TCP connection
addresses, 115
checking, 118
parameter field for, 155
properties, 112
specifying the connection partner, 113
J
Job header, 172
M
MAC address, 75
Multicast, with UDP, 133, 136
Multiproject, 33, 38
configuring connections, 90, 96
NCM S7 Diagnostics online path
examples of an online path with gateway,
215
Examples of an online path without
gateway, 214
NCM S7 diagnostics online path, examples of
an online path with ”PC internal”, 217
Network access, 16
New connection, 94, 95
O
Operator interface devices, 24, 25
Other station, 33, 96
configuring, 65
connecting a subnet, 66
P
PC internal, 217
PG communication
in configured mode, 23
in PG operation, 23
with STEP 7 on PROFIBUS, 23
PG operation, with STEP 7 via Ethernet, 21
PG/PC interface, 25
PROFIBUS, 16
PROFIBUS; user interface to, 25
PROFInet communication, 17, 18
Programmed Communication Connections,
145
Programmed connections, 20
Project variant
1 subnet – 1 project, 35
1 subnet – more than 1 project, 38
2 or more subnets – 1 project, 37
several subnets – several projects, 41
several subnets several projects, 43
SIMATIC S5 and non-SIMATIC devices, 36
R
N
NCM S7
general information, 46
installation, 46
NCM S7 Diagnostics, 61, 205
NCM S7 diagnostics, overview, 206
Index-2
Routing, 143
S
S7 communication on Ethernet, 17, 25
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S7 communication relay, 17, 25
S7 functions, 17
SEND/RECEIVE interface, 17
CPU cycle, 82
data exchange, 78
overview, 29
user program, 79
SIMATIC NET, 16
Subfield types, 159
System data, parameter field for , 150
System memory, access using
FETCH/WRITE, 141
T
TCP Connection, checking properties, 126
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TCP connection, 119
addresses, 123
parameter field for, 153
specifying the connection partner, 120
Type of communication, 17
U
UDP
addresses, 130
checking, 137
configuring, 127
UDP connection
parameter field for, 154
specifying the connection partner, 128
Unspecified connection, 97
Index-3
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