Siemens NCM S7 User manual

Preface, Contents
SIMATIC NET
NCM for Industrial Ethernet
Manual
Communication via Ethernet CPs
in S7 Stations
1
Installing and Starting the Ethernet CP with STEP 7
2
SEND/RECEIVE
interface in the User program
3
Configuring Communication
Connections
4
Programming Functions (FCs)
5
NCM S7 Diagnostics
6
Firmware Loader
7
References
A
Glossary
B
Linking to Other Systems with
FETCH/WRITE
C
SIMATIC NET Support and
Training
D
for NCM S7 V5.x and higher
This manual is part of the documentation
package with the order number:
6GK7080–1AA03–8BA0
Index
11/2000
C79000–G8976–C129
Release 04
Safety Guidelines
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, severe personal injury or substantial property damage will result if proper precautions are
not taken.
Warning
indicates that death, severe personal injury or substantial property damage can result if proper precautions are
not taken.
Caution
indicates that minor personal injury or property damage can result if proper precautions are not taken.
Note
draws your attention to particularly important information on the product, handling the
product, or to a particular part of the documentation.
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
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.
Trademarks
SIMATICR, SIMATIC HMIR and SIMATIC NETR are registered trademarks of SIEMENS AG.
Third parties using for their own purpose any other names in this document which refer to trademarks might
infringe upon the rights of the trademark owners.
Copyright Siemens AG 1999/2000 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
Bereich Automatisierungstechnik
Geschäftsgebiet Industrie-Automatisierung
Postfach 4848, D- 90327 Nuernberg
Subject to technical change.
Siemens Aktiengesellschaft
G79000–G8976–C129-04
Preface
Purpose
This manual 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 manual contains information about the following topics:
S
The performance and areas of application of the communication services
S
Configuring the CP with the NCM S7 configuration software
S
Programming the communication interfaces to the user program
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.x and higher of the NCM S7 configuration
software and to version 5.x and higher of the STEP 7 software.
This version of the manual includes information relating to new functions since
service pack 3 of STEP 7 and NCM S7.
In the main, this involves the following topics:
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 5.
S
Using the FCs AG_FSEND and AG_FRECV, you have blocks available that are
optimized for the SEND/RECEIVE interface with S7-400 stations.
See Chapter 5.
SIMATIC NET NCM S7 for Industrial Ethernet
C79000-G8976-C129/04
i
Preface
S
NCM Diagnostics has a completely revised user interface. See Chapter 6
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.
Additional Information
This manual is also part of the NCM S7 for Industrial Ethernet documentation
package. The following table provides you with an overview.
Title
NCM S7 for Industrial
Ethernet
Primer
Content
Based on simple examples, the primer introduces you to the methods of
connecting and networking SIMATIC S7 stations with CPs on Industrial
Ethernet. The primer 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!
NCM S7 for Industrial
Ethernet
The manual is intended as a guide and reference work for configuring and
programming an Industrial Ethernet CP.
Manual
When working with the configuration software, you can also call up the online
help in specific situations.
IT-CP
Manual
The manual is intended as a guide and sourece 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.
Product Information /
Manual for
Ethernet CP
The product information bulletins / manuals accompanying the CPs contain
information about the specific characteristics of the particular CP and
instructions on installation and connections.
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 on the Internet at:
http://www.ad.siemens.de/net/html_00/online_zugreifen.htm
ii
SIMATIC NET NCM S7 for Industrial Ethernet
C79000-G8976-C129/04
Preface
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
Access to Online Help of STEP 7 and NCM S7
With the online help, you can obtain the following information:
S
Contents with the Help –> Contents menu command
S
Context–sensitive help on the selected object using the Help –> Help menu
command, the F1 function key or the question mark in the toolbar.
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.
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.
Tip:
This symbol appears in the margin to draw your attention to useful tips.
-
SIMATIC NET NCM S7 for Industrial Ethernet
C79000-G8976-C129/04
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Preface
iv
SIMATIC NET NCM S7 for Industrial Ethernet
C79000-G8976-C129/04
Contents
1
Communication via Ethernet CPs in S7 Stations . . . . . . . . . . . . . . . . . . . . . . . . . .
1-1
1.1
Industrial Ethernet . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1-2
1.2
SIMATIC S7 Communication with S7 Ethernet CPs . . . . . . . . . . . . . . . . . .
1-3
1.3
1.3.1
1.3.2
PG/OP Communication via Industrial Ethernet . . . . . . . . . . . . . . . . . . . . . .
Using a PG with STEP 7 on Industrial Ethernet . . . . . . . . . . . . . . . . . . . . . .
OP Operation: Connecting Operator Interface Devices via
Industrial Ethernet . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1-6
1-8
1.4
S7 Communication on Industrial Ethernet . . . . . . . . . . . . . . . . . . . . . . . . . . .
1-10
1.5
S5-Compatible Communication (SEND/RECEIVE Interface) . . . . . . . . . .
1-12
1.6
FETCH/WRITE Services (Server) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1-15
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 Project . . . . . . .
Network/Project Variant: Two or More Subnets in More Than One Project
Network/Project Variant: Connections between Subnets (TCP/IP) . . . . . .
1-16
1-18
1.7.3
1.7.4
1.7.5
1.7.6
2
3
4
1-9
1-19
1-20
1-21
1-22
1-23
Installing and Starting the Ethernet CP with STEP 7 . . . . . . . . . . . . . . . . . . . . . . .
2-1
2.1
General Information About the NCM S7 for Industrial Ethernet Option . .
2-2
2.2
2.2.1
2.2.2
2.2.3
2.2.4
2.2.5
2.2.6
2.2.7
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 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Downloading the Configuration to the PLC . . . . . . . . . . . . . . . . . . . . . . . . . .
2-3
2-4
2-6
2-8
2-10
2-13
2-16
2-17
SEND/RECEIVE Interface in the User Program . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3-1
3.1
How the SEND/RECEIVE Interface Works on the CPU . . . . . . . . . . . . . . .
3-2
3.2
Programming the SEND/RECEIVE Interface . . . . . . . . . . . . . . . . . . . . . . . .
3-4
3.3
Data Exchange S7 CPU <–> Ethernet CP . . . . . . . . . . . . . . . . . . . . . . . . . .
3-7
3.4
3.4.1
3.4.2
Additional Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Programming Data Transfer on TCP Connections . . . . . . . . . . . . . . . . . . .
Recommendations for Use with a High Communications Load . . . . . . . . .
3-9
3-9
3-10
Configuring Communication Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4-1
4.1
Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4-2
4.2
Possible Connection Configurations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4-3
4.3
4.3.1
Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Creating a New Connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4-4
4-7
SIMATIC NET NCM S7 for Industrial Ethernet
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v
Contents
5
6
vi
4.3.2
4.3.3
4.3.4
Connections to Partners in Other Projects . . . . . . . . . . . . . . . . . . . . . . . . . .
Further Functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Connections Without Assignment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4-9
4-11
4-12
4.4
4.4.1
4.4.2
4.4.3
4.4.4
4.4.5
Configuring ISO Transport Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Specifying ISO Transport Connection Properties . . . . . . . . . . . . . . . . . . . . .
Specifying ISO Transport Addresses . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Specifying ISO Transport Dynamic Properties . . . . . . . . . . . . . . . . . . . . . . .
ISO Transport with the FETCH/WRITE Mode . . . . . . . . . . . . . . . . . . . . . . .
Checking ISO Transport Connection Properties . . . . . . . . . . . . . . . . . . . . .
4-15
4-16
4-18
4-21
4-23
4-25
4.5
4.5.1
4.5.2
4.5.3
4.5.4
Configuring ISO-on-TCP Connections Properties . . . . . . . . . . . . . . . . . . . .
Specifying the ISO-on-TCP Connection Partner . . . . . . . . . . . . . . . . . . . . .
Specifying ISO-on-TCP Addresses . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
ISO-on-TCP with the FETCH/WRITE Mode . . . . . . . . . . . . . . . . . . . . . . . . .
Checking ISO-on-TCP Connection Properties . . . . . . . . . . . . . . . . . . . . . . .
4-27
4-28
4-30
4-33
4-35
4.6
4.6.1
4.6.2
4.6.3
4.6.4
Configuring TCP Connection Properties . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Specifying the TCP Connection Partner . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Specifying TCP Addresses . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
TCP with the FETCH/WRITE Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Checking TCP Connection Properties . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4-36
4-37
4-39
4-42
4-44
4.7
4.7.1
4.7.2
4.7.3
4.7.4
Configuring UDP Connection Properties . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Specifying UDP Connection Partners . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Specifying UDP Addresses . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Checking the Properties of a UDP Connection . . . . . . . . . . . . . . . . . . . . . . .
Free UDP Connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4-46
4-47
4-49
4-53
4-55
4.8
Routing to Distribute Load . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4-56
Programming Functions (FCs) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5-1
5.1
General Notes on FCs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5-2
5.2
5.2.1
5.2.2
5.2.3
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) . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5-4
5-4
5-6
5-6
5.3
5.3.1
5.3.2
FCs for Configured Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
FCs AG_SEND / AG_LSEND (FC5 / FC50) . . . . . . . . . . . . . . . . . . . . . . . . .
FC AG_RECV / AG_LRECV . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5-7
5-10
5-15
5.4
5.4.1
5.4.2
FCs for Access Coordination with FETCH/WRITE . . . . . . . . . . . . . . . . . . .
FC AG_LOCK . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
FC AG_UNLOCK . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5-20
5-22
5-24
NCM S7 Diagnostics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
6-1
6.1
Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
6-2
6.2
6.2.1
6.2.2
Functions of NCM S7 Diagnostics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Installing and Starting NCM S7 Diagnostics . . . . . . . . . . . . . . . . . . . . . . . . .
General Menu Commands . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
6-3
6-4
6-6
6.3
Starting Diagnostics – Establishing a Connection to the Ethernet CP . . .
6-8
6.4
How to Use Diagnostics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
6-11
6.5
Call-Specific Diagnostic Functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
6-12
SIMATIC NET NCM S7 for Industrial Ethernet
C79000-G8976-C129/04
Contents
6.6
6.6.1
6.6.2
Checklist for ‘Typical Problems‘ in a System . . . . . . . . . . . . . . . . . . . . . . . .
Checklist for General CP Functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Communication Connections Checklist . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
6-14
6-15
6-16
Firmware Loader . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
7-1
7.1
Application . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
7-2
7.2
Loading Firmware . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
7-3
A
References . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
A-1
B
Glossary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
B-1
B.1
General Section . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
B-2
B.2
Ethernet . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
B-6
C
Linking to Other Systems with FETCH/WRITE . . . . . . . . . . . . . . . . . . . . . . . . . . . .
C-1
D
SIMATIC NET – Support and Training . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
D-1
Customer Support, Technical Support . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
D-1
7
Index
r
SIMATIC NET NCM S7 for Industrial Ethernet
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Contents
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SIMATIC NET NCM S7 for Industrial Ethernet
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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 product
information /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 /5/
and /7/.
S
For using, structuring and handling Industrial Ethernet, you will find detailed
information in /10/.
S
For a general introduction to local area networks with TCP/IP refer to /15/ and
/16/.
SIMATIC NET NCM S7 for Industrial Ethernet
C79000-G8976-C129/04
1-1
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 /10/).
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.
1-2
SIMATIC NET NCM S7 for Industrial Ethernet
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Communication via Ethernet CPs in S7 Stations
1.2
SIMATIC S7 Communication with S7 Ethernet CPs
Type of Communication
The Ethernet CP for SIMATIC S7 supports the following types of communication
depending on the CP type:
Ethernet CP
S7 – 400
Ethernet CP
S7 – 300
Possible types of communication
S PG/OP communication
S S7 communication
S5-compatible
communication
with
with the protocols
–
ISO
–
TCP/IP (RFC 1006)
HTML process
control with web
browser
File management
and file access
with FTP
SEND/RECEIVE
interface
FETCH/WRITE
services (server)
via connection types:
S ISO Transport
Figure 1-2
S
S
S
S
ISO-on-TCP
TCP
UDP
S ISO Transport
E-mail:
S ISO-on-TCP
S TCP
Types of Communication/Services of the Ethernet CP
S
PG/OP Communication
PG/OP communication is used to download programs and configuration data,
to run test and diagnostic functions and operate and monitor a plant while
working at an OP.
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Communication via Ethernet CPs in S7 Stations
S
S7 Communication
The S7 communication forms a simple and efficient interface between SIMATIC
S7 stations and PGs/PCs using communication function blocks.
S
S5-compatible communication
– 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.
– 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 or from devices
of other ranges.
S
HTML Process Control
With the IT-CP, you use the supplied functions and HTML pages to query
important system data using a web browser (refer to the IT-CP manual for more
information /4/).
S
File Management and File Access with FTP
The IT-CP (S7-400) provides additional function 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 /4/).
– 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.
Communication Services on the SEND/RECEIVE Interface
Depending on the CP type, the following communication services are available:
S
ISO Transport
optimized for top performance at the self-contained manufacturing level
S
TCP/IP for internetwork communication with
– ISO-on-TCP connections (RFC 1006)
– TCP connections
– UDP datagram service
S
Sending E-mail
– The controller is capable of sending messages triggered by process events
(refer to the IT-CP manual for details).
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Possibilities for Communication between Types of Device
The possible communication available with the types of communication listed
above is shown in the following table:
PC
S7-400
S7-300
S7 communication
(S7-300 server only)
S7-300
SEND/RECEIVE
S5-115 to –155U/H
SEND/RECEIVE
FETCH/WRITE
SEND/RECEIVE
PG/OP
communication1)
S7 communication
SEND/RECEIVE
FETCH/WRITE
HTML process
control
S7/M7-400
S7 communication
S7 communication
SEND/RECEIVE
SEND/RECEIVE
SEND/RECEIVE
FETCH/WRITE
PG/OP
communication1)
S7 communication
FTP services
SEND/RECEIVE
FETCH/WRITE
HTML process
control
FTP services
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.
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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 Operation
PG operation 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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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 1-3
Configuration for PG/OP Operation
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Communication via Ethernet CPs in S7 Stations
1.3.1
Using a PG with STEP 7 on Industrial Ethernet
Requirement for PG Operation
PG operation is possible when the following requirements are met:
S
An Ethernet CP must be installed on the PG.
S
The Ethernet CP has been assigned an address (node initialization).
Networking the PG
To be able to use a PG on Industrial Ethernet, follow the steps outlined below:
1. Connect the SIMATIC S7 stations you want to reach with the programming
device to Industrial Ethernet.
2. Configure the stations via the MPI interface so that the hardware configuration
and the networking parameters are loaded. Follow the instructions in Section
2.2 to network the Ethernet CP.
The minimum requirements for operation on Industrial Ethernet are that the
MAC/Internet address is set; this is known as node initialization.
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.
After you have worked through these steps, the PG (STEP 7) automatically finds
the path to all intelligent modules in your SIMATIC S7 station via Industrial
Ethernet.
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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 Industrial Ethernet or S7-1413/WIN 95, WIN NT, MS-DOS,
Windows installed
S
The CPs in the S7 stations have a MAC/Internet address (node initialization;
see Section 1-11).
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 and configured S7 connections.
Per job, up to 64 Kbytes of user data can be transmitted.
The CP acts as an “S7 communication relay” that passes on the S7 functions via
Industrial Ethernet (see /7/).
Stations for S7 Communication
The Ethernet CP supports S7 communication via Industrial Ethernet on the basis
of ISO transport and ISO-on-TCP for:
S
PC applications with an Ethernet CP and an interface to the SIMATIC S7 PLC
for operator intervention, monitoring and control;
S
Communication between S7 stations with integrated communication SFBs/FBs.
S7 – 400
Ethernet CP
S7 – 300
Ethernet CP
Server
Client
Ethernet
Operator Interface functions
WAN *
PG with Ethernet CP
PC with Ethernet CP
S7 – 400
Figure 1-4
1-10
* only TCP/IP
M7
Ethernet CP
S7 Communication on Industrial Ethernet
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Communication via Ethernet CPs in S7 Stations
Networking S7 Stations
Before you can use S7 communication, you must first network the S7 stations as
follows:
1. Attach the CPs of the SIMATIC S7 stations that you want to communicate with
to the Ethernet subnet using S7 functions.
2. Configure the stations via the MPI interface so that the hardware configuration
and the networking parameters are loaded. Follow the instructions in Section
2.2 to network the Ethernet CP.
The minimum requirements for operation on Industrial Ethernet are that the
MAC/Internet address is set; this is known as node initialization.
Communication in the User Program
You use SFBs (S7-400) in the user program; these system and standard functions
are described in detail in /8/.
Configuring Connections for S7 Stations
To use S7 communication for data exchange between two SIMATIC S7 stations,
use the connection configuration in STEP 7. For more detailed information, please
refer to the STEP 7 description /5/ /7/.
Communication with a PC/PG via the S7 Interface – Procedure
PC operation is possible when the following conditions are met:
S
The PC has:
– an Ethernet CP installed
– SOFTNET S7 for Industrial Ethernet or S7-1413/WIN 95, WIN NT, MS-DOS,
Windows is installed
S
The CPs in the S7 stations have a MAC/Internet address (node initialization;
see page 1-11).
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.
For more detailed information, refer to the manual of the Ethernet CP you are
using in the PC /11/.
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Communication via Ethernet CPs in S7 Stations
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 /16//18//19/)) with ISO-on-TCP (see /17/) or TCP connection
– ISO transport connection
S
simple (unacknowldeged) transfer of related blocks of data (datagram service)
between two Ethernet nodes with UPD (User Datagram Protocol) on IP.
The SEND/RECEIVE interface is also suitable for sending E-mail (refer to the
manual for the IT-CP /4/).
For TCP applications, there is an active network with IP protocol (see /19/).
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.
IP (Internet Protocol)
For internetwork data transmission, the following services are available with
suitable CPs such as the CP 443-1 TCP:
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 /17/).
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 automatic repetition and additional
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Communication via Ethernet CPs in S7 Stations
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 /17/).
S
UDP connection
UDP is intended for simple internetwork data transmission without confirmation.
If the connection is suitably configured, broadcast frames can also be sent on
UDP connections.
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).
Stations
The SEND/RECEIVE interface allows program-controlled communication on
Industrial Ethernet between the SIMATIC S7 PLC and the following:
1
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
The previous name of the SEND/RECEIVE interface was S5S5 connections
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Communication via Ethernet CPs in S7 Stations
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
1-14
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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Communication via Ethernet CPs in S7 Stations
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.
Tools
The SIMATIC Manager provides convenient tools for configuring and documenting
networks (also graphically with NetPro).
The chapter describing network configuration in /5/ and the online help system also
contain information about configuring SIMATIC S7 networks.
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
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Variant (examples)
Characteristics/Configuration
4
1 subnet – more than one project
5
More than one subnet – more than one project
6
Internetwork connections (ISO-on-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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Communication via Ethernet CPs in S7 Stations
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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Communication via Ethernet CPs in S7 Stations
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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Communication via Ethernet CPs in S7 Stations
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:
1-20
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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Communication via Ethernet CPs in S7 Stations
1.7.4
Network/Project Variant: One Subnet – More Than One Project
Configuration of the System
In complex networked systems, it maybe more practical to manage the stations in
more than one project.
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
View in a STEP 7 Project
To be able to address stations that are managed in a different project (production
2), these stations are configured additionally as “Other stations” (in the
project for production 1).
This representation illustrates the following:
S
A subnet can be assigned to several projects.
Note
S7 connections can only be configured within one project.
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Communication via Ethernet CPs in S7 Stations
1.7.5
Network/Project Variant: Two or More Subnets in More Than
One Project
Configuration of the System
If the different tasks of the stations or the extent of the system mean that different
network types are necessary and that the network types must be managed in
different projects, the stations in a different project can once again be addressed
by configuring them as “Other stations”.
Ethernet (1)
Cell level
S7 – 400/1
Ethernet CP
PROFIBUS CP
Field level
PROFIBUS (1)
S7 – 300/1
1-22
S7 – 300/2
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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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Communication via Ethernet CPs in S7 Stations
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Installing and Starting the Ethernet CP
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 product
information / 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 /5/.
– Configuring and assigning parameters to modules in /5/
– Configuring networks in /5/. 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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Installing and Starting the Ethernet CP with STEP 7
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 /5/.
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Installing and Starting the Ethernet CP with STEP 7
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 /5/).
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)
Program the SEND/RECEIVE interface (see
Chapter 3)
Configuring communication services (see Chapter 4)
– S7 connections /5/
– ISO transport connections
– ISO-on-TCP connections
– TCP connections
– UDP
Configuration data in
the STEP 7 project
Download the configuration to the PLC (see 2.2.7).
The steps are explained in detail in the sections shown.
Fields with broken lines are optional.
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2-3
Installing and Starting the Ethernet CP with STEP 7
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
"
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
Project with Assigned Ethernet Network
3. If you prefer a graphic network display, select the network object “Ethernet” and
confirm with Edit " Open Object.
2-4
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Installing and Starting the Ethernet CP with STEP 7
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.
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Installing and Starting the Ethernet CP with STEP 7
2.2.2
Entering an Ethernet CP in the Hardware Configuration
Procedure
By inserting the Ethernet CP in the rack of a SIMATIC station and assigning it to
the station, you establish the logical attachment between the CP and 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 is described in detail in /5/.
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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Installing and Starting the Ethernet CP with STEP 7
Note
You can open the dialog for setting the interface at any time from the Properties
dialog of the CP in the “General” tab.
3. 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.
4. Check the addresses and if necessary change them. The system enters the
next free address automatically.
5. Select the required subnet type in the “Subnet” list box.
6. You can display the properties dialog box for the selected subnet by clicking the
Properties button.
7. Enter information specific to the subnet node in the “General” tab.
8. You must finally confirm your input with OK, otherwise the networking is not
entered (refer to Point 5.).
Result: The CP is now configured as a network node for the corresponding S7
station.
Note
The input boxes “IP address” and “Subnet mask” are irrelevant for ISO transport.
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Installing and Starting the Ethernet CP with STEP 7
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
2-8
NetPro View of a Subnet of the Type Industrial Ethernet
SIMATIC NET NCM S7 for 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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Installing and Starting the Ethernet CP with STEP 7
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. In the dialog, you will see further tabs in
addition to the “General” tab described in Section 2.2.2 depending on the type
and CP, some of which are shown in the example of a CP 443-1:
Figure 2-5
F1
Example of the “General” Tab of the “Properties CP” Dialog Box for the CP 443-1 TCP
Please read the description of the Properties dialog of the CP in the integrated
help. The functions are explained in detail there.
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 5.
2-10
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Installing and Starting the Ethernet CP with STEP 7
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 is permitted to pass on 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.
S If you select this configuration for an S7-300, remember that a
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 /12/ and /6/.
S Replace Module without PG
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 EEPROM of the CP. Remember,
however, that long-term storage on the CPU is only safe against
power failure if the CPU is battery backed or if you use an S7
memory card.
S Ethernet Profile for
Fault-Tolerant Connections
Select this profile if you use fault-tolerant communication in your
system. Fault-tolerant means that you have designed Industrial
Ethernet to include redundant components 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.
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Installing and Starting the Ethernet CP with STEP 7
Table 2-1
Settings in the “Options” Tab , continued
Option
S Individual Network Settings
Meaning / Effect
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.
S Send Keepalives for
Connections
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
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.
Diagnostics Tab
In the “Diagnostics” tab, you can start NCM S7 Ethernet Diagnostics.
See Chapter 6 Diagnostics for a description of the diagnostic functions
themselves.
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Installing and Starting the Ethernet CP with STEP 7
2.2.5
“Substitute Objects” in the STEP 7 Project
Overview
For the following 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, substitute objects must be created in the project:
S
SIMATIC S5 stations
S
Devices from other vendors (other stations)
S
PG/PC
S
SIMATIC S7 stations in a different project (other stations)
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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SIMATIC S5
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Installing and Starting the Ethernet CP with STEP 7
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 2-6
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.
2-14
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Installing and Starting the Ethernet CP with STEP 7
Figure 2-7
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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Installing and Starting the Ethernet CP with STEP 7
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 /5/
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.
The information in the STEP 7 user manual /5/ 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.
2-16
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Installing and Starting the Ethernet CP with STEP 7
2.2.7
Downloading the Configuration to the PLC
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 always use this attachment when you download the configuration data for
the first time (node initialization).
During the so-called “node initialization”, you supply the Ethernet CP with a
MAC or Internet address. You will have configured the CP so that further
configuration is possible working on the PG connected to the Ethernet. Node
initialization is only possible via MPI.
S
Industrial Ethernet
Here, you use the PG mode of the Ethernet CP in the S7 station (see also
Section 1.3). The node must previously have been initialized via the MPI
attachment.
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.
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” /5/.
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Installing and Starting the Ethernet CP with STEP 7
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).
Note
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”.
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:
Note
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 1413), please refer to the
appropriate manuals.
S
The FCs for programming connections are described in Section 5.3.
S
Configuring the Ethernet CP with NCM S7 is described in Chapter 4.
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 on the Internet at:
http://www.ad.siemens.de/net/html_00/online_zugreifen.htm
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3-1
SEND/RECEIVE Interface in the User Program
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
3-2
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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SEND/RECEIVE Interface in the User Program
Note
The transfer of more than 240 bytes of data is supported by newer version CPs.
Please refer to the technical data in the product information of the Ethernet CP.
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3-3
SEND/RECEIVE Interface in the User Program
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 5.
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.
Programming Connections
Program the SEND/RECEIVE interface in the user program as follows:
1. Use the following functions (FCs) for data transmission on connections:
– AG_SEND for transferring the user data area to the Ethernet CP
– AG_RECV for entering data received from the Ethernet CP in the user data
area
2. Evaluate the following bits in the FCs:
– for AG_SEND the parameters DONE, ERROR, STATUS
– for AG_RECV the parameters NDR, ERROR, STATUS
Note
Connection numbers (IDs) must be taken from the configuration when
programming.
3-4
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SEND/RECEIVE Interface in the User Program
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 PII
User program
OB
Read in the received
data of the
connection
AG_RECV
ÇÇÇÇÇÇÇÇ
ÇÇÇÇÇÇÇÇ
AG_RECV
Communication
connection
ÇÇÇÇÇÇÇ
ÇÇÇÇÇÇÇ
ÇÇÇÇÇÇÇ
ÇÇÇÇÇÇÇ
ÍÍÍÍÍÍÍ
ÍÍÍÍÍÍÍ
ÍÍÍÍÍÍÍ
ÍÍÍÍÍÍÍ
ÍÍÍÍÍÍÍ
Communication
connection
AG_SEND
ÍÍÍÍÍÍÍÍ
ÍÍÍÍÍÍÍÍ
ÍÍÍÍÍÍÍÍ
ÍÍÍÍÍÍÍÍ
ÇÇÇÇÇÇÇÇ
ÇÇÇÇÇÇÇÇ
ÇÇÇÇÇÇÇÇ
AG_RECV
AG_SEND
Communication
connection
Transfer send data
for the connection
AG_SEND
Write PIQ
Legend:
Figure 3-2
ÍÍ
ÇÇ
ÍÍ
ÇÇ
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:
S
The user program consisting of any number of blocks (OBs, FBs or FCs –> see
/5/ accesses several connections (Figure 3-2 illustrates three connections).
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3-5
SEND/RECEIVE Interface in the User Program
S
At various points (event and program-controlled) the user program sends data
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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SEND/RECEIVE Interface in the User Program
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 5. 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:
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.
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.
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SEND/RECEIVE Interface in the User Program
Note
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”).
3-8
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SEND/RECEIVE Interface in the User Program
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)
For data transfer, use only FC AG_LSEND (FC 50) and FC AG_LRECV (FC
60).
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. In the receiving station, you evaluate only the length information and
then fetch the appropriate amount of data in a further receive job.
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SEND/RECEIVE Interface in the User Program
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 (FC 5/FC6 or FC 50/60) 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.
-
3-10
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Configuring Communication Connections
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
For the properties of the configurable connection type E-mail, refer to /4/.
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
Configuring Communication Connections
4.1
Procedure
Steps
The following steps are necessary to operate connections on the SIMATIC S7 PLC
with the Ethernet CP:
Configuring
Programming
If necessary,
configure “Other
Station” for
connections using the
appropriate tool.
Create new
connections
Program the
SEND/RECEIVE interface in
the user program.
(Refer to Section 3.2 and the
detailed FC description in
Chapter 5).
Configure connection
properties.
Download connection configurations
to the CP
necessary steps
optional steps
Figure 4-1
4-2
Operating Connections with the Ethernet CP
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Configuring Communication Connections
4.2
Possible Connection Configurations
Connections within a Project
Connections are possible between different communication partners within a
project as shown in the following diagram.
Connections to communication partners outside a project are configured 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 4-2
Possible Connections
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4-3
Configuring Communication Connections
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.
The free UDP connection is the exception to this. Here, the address is specified
at the FC interface in the user program.
SIMATIC S7 station
with EthernetEthernet
CP
CP
send
receive
Ethernet
node
Communication
connection
receive
send
Ethernet
node
send
receive
Figure 4-3
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 product information /1/ accompanying 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
Note
The transfer of more than 240 bytes of data is supported by newer version CPs.
Please refer to the technical data in the product information 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.
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
The connection is established automatically as soon as the partner is obtainable.
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Configuring Communication Connections
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.
Note
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
Creating a 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.
How to Open the Connection Table
You can open the connection table in a variety of ways:
Using the “Start” button in the Windows taskbar SIMATIC
Networks, you open the NetPro graphic representation.
"
STEP 7" Configure
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 key!).
"
New Connections (also available with the
As an alternative, you can start in the SIMATIC Manager, as follows:
1. Open your CPU in the SIMATIC Manager.
2. Select the object Connections
.
3. Double-click the object or select the menu command
Edit " Open Object.
Result: The connection table appears on the screen with all the connections
configured for the selected CPU (local node).
As an alternative, you can also open the connection configuration from the graphic
network view. Select the station or CPU of the station in NetPro. Select the Insert
" New Connections menu command.
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Configuring Communication Connections
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:
1. Select the menu command Insert
"
New Connection
Result: The following dialog appears on the screen.
Figure 4-4
Layout of the “New Connection” Dialog (Example of an ISO Transport Connection)
2. In the “Station” box, select the station to which you want to establish a
connection. After you have selected your local station, all the remote partners in
the S7 project and all their programmable modules (CPUs) are displayed for
selection.
3. In the “Module” box, select the CPU in the station to which you want to
establish a connection .
4. Select the connection type you want to use (for example ISO transport
connection) in the “Type” box
If you confirm your entries with Add, the new connection is created and the “New
Connection” remains open. This allows you to create further connections without
needing to reopen the dialog box. At the same time, the connection list is updated.
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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Configuring Communication Connections
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.
Note
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 two 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
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 two 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 is 0.0.0.0 and the remote TSAP is 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
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Configuring Communication Connections
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.
The following table lists the possible options.
Table 4-2
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
Meaning for Connection
Establishment
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.
Note
The number of connections possible per Ethernet CP can be found in the product
information /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
S
S
S
Overview of all connections (complete connection table)
Overview of the selected connections (selected area)
Detailed printout of all connections (details of all connections)
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.
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Configuring Communication Connections
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.
Note
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.
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.
4-12
All the connections to this station
are deleted within the project.
Reconfigure the station and
connections.
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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 “!”.
Reassign the connections using the
menu option Edit " Connection
Partner... or in the “Addresses” tab of
the properties dialog for the connection.
Display (Example)
The status of connections is displayed in the “Properties ISO Transport
Connection” dialog in the “Overview” tab.
Figure 4-5
Status of the Connections in the “Overview” Tab (Example of ISO Transport Connections)
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Configuring Communication Connections
Note
If a CP is replaced by a different CP, this must provide at least the same services
and must be at least the same version.
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Configuring Communication Connections
4.4
Configuring ISO Transport Connections
Introduction
As well as the entry in the connection table, you can also modify special properties
for each configured connection.
Here, you can change specific connection parameters that were entered as
defaults during the new connection dialog.
Calling 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 the global parameters of the connection and the local name of the ISO
transport connection.
S
Addresses
Displays the local and remote address information.
S
Dynamics
Displays the relevant timers and counters.
S
Options
Here, you can select the following modes:
– FETCH or WRITE
S
Overview
This is an overview of all the configured ISO transport 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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Configuring Communication Connections
4.4.1
Specifying ISO Transport Connection Properties
General Tab
This tab in the properties dialog displays parameters for the connection and the
local connection name of the ISO transport connection.
The local ID is identical to the ID in the NetPro connection table (STEP 7
connection configuration) and is shown here to illustrate the assignment.
Figure 4-6
4-16
Layout of the Properties Dialog for the “General” Tab (ISO Transport Connections)
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Attributes
Description
Access
Local ID
Identical to the value from the connection list
Selectable
Name
Proposed name that can be changed by the user. With unspecified
connections, use this box to identify the partner.
Modifiable
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 4.8.
Display only
Connection
Endpoint
If no CP is assigned (for example because the CP was previously
deleted) “none” is displayed here.
Active Connection
Establishment
The default setting is active. If the connection is unspecified,
establishment is passive.
Modifiable
ON: the connection is established actively.
OFF: the connection is established by the partner.
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
“Active Connection Establishment” Option
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.
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.
If you select FETCH or WRITE in the “Options” tab, the option is deselected
(passive connection establishment) and cannot be selected.
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Configuring Communication Connections
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 4-7
Ethernet station B
Local
TSAP
ISO transport
connection
Remote
TSAP
MAC
address B
Sending and Receiving on one ISO Transport Connection
Note
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 4-8
Layout of the “Addresses” Tab of the Properties Dialog with Default TSAPs
TSAP Format
ISO transport connections have a TSAP length of 1 to 32 bytes. When you are
entering values, the current length is displayed automatically (visible display: 20
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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Configuring Communication Connections
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 4-9
4-20
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 4-10
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).
Modifiable
Max. Count
Max. Count is the number of attempted
transmissions including the first (1–100, default
5).
Modifiable
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Configuring Communication Connections
Attributes
Description
Access
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
Note
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
ISO Transport with the FETCH/WRITE Mode
Using FETCH PASSIVE / WRITE PASSIVE
If you select one of the FETCH PASSIVE or WRITE PASSIVE modes 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.
Figure 4-11
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 establishment is passive; in other words, only the partner station
(SIMATIC S5 station or other non-S7 station) can establish the connection. The
setting is made automatically in the “General” tab and cannot be changed.
S
FETCH
If you select the FETCH mode, you allow direct read access to system memory
on the SIMATIC S7 PLC. Such access can be, for example, from a SIMATIC
S5 station or other station.
S
WRITE
If you select the WRITE mode, you allow direct write access to system memory
on the SIMATIC S7 PLC. Such access can be, for example, from a SIMATIC
S5 station or other station.
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Configuring Communication Connections
Note
If you select this configuration for an S7-300, remember that a 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 /12/ and /6/.
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.
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
6.5).
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4.4.5
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).
Figure 4-12
Layout of the “Overview” Tab of the Properties Dialog
Parameter
Description
Local ID
This is the connection ID of the ISO transport connection
Conn. Name
Entered connection name identifying the ISO transport connection.
R/S
Rack/slot of the local CP via which the connection is established.
Remote
address
Specifies the remote MAC address of the connection on the Ethernet
subnet.
Local TSAP
Local transport service access point.
Partner TSAP
Remote transport service access point.
Status
The status displays the current configuration status 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.
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Configuring Communication Connections
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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Configuring Communication Connections
4.5
Configuring ISO-on-TCP Connections Properties
Introduction
As well as the entry the connection table, you can also modify specific connection
parameters that were entered as defaults during the New connection dialog.
Calling 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:
S
General
Displays the parameters of the connection and the local name of the
ISO-on-TCP connection.
S
Addresses
Displays the local and remote address information.
S
Options
Here, you can select the following modes:
– 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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Configuring Communication Connections
4.5.1
Specifying the ISO-on-TCP Connection Partner
General Tab
This tab in the properties dialog displays global parameters for the connection and
the local connection name of the ISO-on-TCP connection.
The local ID is identical to the ID in the NetPro connection table (STEP 7
connection configuration) and is shown here to illustrate the assignment.
Figure 4-13
4-28
Layout of the “General” Tab in the Properties Dialog for ISO-on-TCP Connections
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Parameter
Description
Access
Local ID
Identical to the value from the connection list
Selectable
Name
Proposed name plus suffix connection number that can be
changed by the user (max. 24 characters).
Modifiable
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 4.8.
Display only
Connection Endpoint
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.
If you select FETCH or WRITE in the “Options” tab, the option is
deselected (passive connection establishment) and cannot be
selected.
ON: the connection is established actively.
OFF: the connection is established by the partner.
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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Configuring Communication Connections
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
Local
TSAP
ISO-on-TCP
connection
Remote
TSAP
IP
address A
Figure 4-14
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.
Note
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)
4-30
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Configuring Communication Connections
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 4-15
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 – 32 bytes. When you are
entering values, the current length is displayed automatically (visible display: 20
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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Configuring Communication Connections
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 intentions, 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 4-16
4-32
Layout of the “Addresses” Tab of the Properties Dialog for an Unspecified Connection
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Configuring Communication Connections
4.5.3
ISO-on-TCP with the FETCH/WRITE Mode
Using FETCH PASSIVE / WRITE PASSIVE
If you select one of the FETCH PASSIVE or WRITE PASSIVE modes for the
ISO-on-TCP connection, you can access the system areas on a SIMATIC S7 PLC
from a SIMATIC S5 station or other non-S7 station.
Figure 4-17
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 establishment is passive; in other words, only the partner station
(SIMATIC S5 station or other non-S7 station) can establish the connection. The
setting is made automatically in the “General” tab and cannot be changed.
S
FETCH
If you select the FETCH mode, you allow direct read access to system memory
on the SIMATIC S7 PLC. Such access can be, for example, from a SIMATIC
S5 station or other station.
S
WRITE
If you select the WRITE mode, you allow direct write access to system memory
on the SIMATIC S7 PLC. Such access can be, for example, from a SIMATIC
S5 station or other station.
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Configuring Communication Connections
Note
If you select this configuration for an S7-300, remember that a 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 /12/ and /6/.
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.
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
6.5).
4-34
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Configuring Communication Connections
4.5.4
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.
Figure 4-18
Layout of the “Overview” Tab in the Properties Dialog for ISO-on-TCP Connections
Parameter
Description
This is the connection ID of the ISO-on-TCP connection
Local ID
Conn. Name
Entered connection name This identifies the ISO-on-TCP connection.
R/S
Remote
Address
Local TSAP
Rack/slot of the local CP via which the connection is established.
Specifies the remote IP address of the connection.
Remote TSAP
Status
Remote transport service access point (8 characters default width).
The status displays the current configuration status 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.
Local transport service access point.
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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Configuring Communication Connections
4.6
Configuring TCP Connection Properties
Introduction
After the entry in the connection table, you can modify specific connection
parameters for each configured connection that were given default values when
you created the connection.
Calling 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:
4-36
S
General
Displays the parameters of the connection and the local name of the TCP
connection.
S
Addresses
Displays the local and remote address information.
S
Options
Here, you can select the modes 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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Configuring Communication Connections
4.6.1
Specifying the TCP Connection Partner
General Tab
This tab in the properties dialog displays parameters for the connection and the
local connection name of the TCP connection.
The local ID is identical to the ID in the NetPro connection table (STEP 7
connection configuration) and is shown here to illustrate the assignment.
Figure 4-19
Layout of the “General” Tab in the Properties Dialog for TCP Connections
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Configuring Communication Connections
Attribute
Description
Access
Local ID
Identical to the value from the connection list
Selectable
Name
Proposed name plus suffix connection number that can be
changed by the user (max. 24 characters).
Modifiable
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 4.8.
Display only
Connection Endpoint
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”
Option
Select this option to configure an FTP connection. Using an
FTP connection, you can access an FTP server from the user
program on the S7–CPU using special FCs.
Requirement: The option can only be selected for an
unspecified TCP connection.
You can configure up to 10 FTP connections.
Can be
selected for
an
unspecified
TCP
connection
Selecting the option has the following effects:
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 to FTP and cannot be
changed.
S The ”Active connection establishment” option is irrelevant
and cannot be set.
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
4-38
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Configuring Communication Connections
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
IP
address A
Figure 4-20
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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Configuring Communication Connections
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 4-21
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!
4-40
from 5000...65535
SIMATIC NET NCM S7 for Industrial Ethernet
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Configuring Communication Connections
Addresses Tab – Unspecified TCP Connection
If you select the partner type as “unspecified”, depending on your intentions, 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 4-22
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Configuring Communication Connections
4.6.3
TCP with the FETCH/WRITE Mode
Using FETCH PASSIVE / WRITE PASSIVE
If you select one of the FETCH PASSIVE or WRITE PASSIVE modes for the TCP
connection, you can access the system areas on a SIMATIC S7 PLC from a
SIMATIC S5 station or other non-S7 station.
Figure 4-23
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 establishment is passive; in other words, only the partner station
(SIMATIC S5 station or other non-S7 station) can establish the connection. The
setting is made automatically in the “General” tab and cannot be changed.
S
FETCH
If you select the FETCH mode, you allow direct read access to system memory
on the SIMATIC S7 PLC. Such access can be, for example, from a SIMATIC
S5 station or other station.
S
WRITE
If you select the WRITE mode, you allow direct write access to system memory
on the SIMATIC S7 PLC. Such access can be, for example, from a SIMATIC
S5 station or other station.
4-42
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Configuring Communication Connections
Note
If you select this configuration for an S7-300, remember that a 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 /12/ and /6/.
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.
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
6.5).
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Configuring Communication Connections
4.6.4
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.
Figure 4-24
Layout of the “Overview” Tab in the Properties Dialog for TCP Connections
Parameter
Description
Local ID
This is the connection ID of the TCP connection (STEP 7 connection
configuration; DWORD)
Conn. Name
Entered connection name It identifies the TCP connection (8
character double width).
R/S
Rack/slot of the local CP via which the connection is
established.
Remote
address
Specifies the remote IP address of the connection.
Local port
Local port (8 characters default length)
4-44
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Configuring Communication Connections
Parameter
Description
Remote port
Remote port (8 characters default width)
Status
The status displays the current configuration status 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.
SIMATIC NET NCM S7 for Industrial Ethernet
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Configuring Communication Connections
4.7
Configuring UDP Connection Properties
Introduction
After the entry in the connection table, you can modify specific connection
parameters for each configured connection that were given default values when
you created the connection.
Calling 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:
4-46
S
General
Displays the parameters of the connection and the local name of the UDP
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.
SIMATIC NET NCM S7 for Industrial Ethernet
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Configuring Communication Connections
4.7.1
Specifying UDP Connection Partners
General Tab
This tab of the Properties dialog displays the parameters of the connection and a
local connection name for the UDP connection.
The local ID is identical to the ID in the NetPro connection table (STEP 7
connection configuration) and is shown here to illustrate the assignment.
Figure 4-25
Layout of the “General” Tab in the Properties Dialog for UDP Connections
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Configuring Communication Connections
Attributes
Description
Access
Local ID
Identical to the value from the connection list
Selectable
Name
Proposed name plus suffix connection number that can be
changed by the user (max. 24 characters).
Modifiable
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 4.8.
Display only
Connection Endpoint
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
4-48
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Configuring Communication Connections
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
IP
address A
Figure 4-26
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.
S
Unspecified UDP connection
You entered “unspecified” for the connection partner when you created the
connection.
S
Connection to all Broadcast Nodes
If you select the connection type “Connection to all broadcast nodes”, you
specify that UDP frames are sent to all obtainable broadcast nodes.
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Configuring Communication Connections
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 4-27
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
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.
4-50
1 to 1024
2000... onwards
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Configuring Communication Connections
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 or a different STEP 7 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 4-28
Layout of the Properties Dialog in the “Addresses” Tab for the “Free UDP Connection” Mode
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Configuring Communication Connections
Addresses Tab – Connection to all Broadcast Nodes
If you select the connection type “Connection to all broadcast nodes”, 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 4-29
4-52
Layout of the Properties Dialog “Addresses” Tab for the “Broadcast” Mode
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Configuring Communication Connections
4.7.3
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.
Figure 4-30
Layout of the “Overview” Tab in the Properties Dialog for UDP Connections
Parameter
Description
Local ID
This is the connection ID of the UDP connection (STEP 7 connection
configuration; DWORD)
Conn. Name
Entered connection name This identifies the UDP connection (8
characters default length).
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
The status displays the current configuration status 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.
SIMATIC NET NCM S7 for Industrial Ethernet
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Configuring Communication Connections
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.
4-54
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Configuring Communication Connections
4.7.4
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 4-31
Sending and Receiving on an Unspecified UDP Connection with Programmed Addressing
Amounts of Data
Refer to the product information /1/ accompanying 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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Configuring Communication Connections
4.8
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.
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. -
4-56
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Programming Functions (FCs)
5
Ready-made blocks form the interface to some of the communications services
available with the Ethernet CPs. This chapter includes a detailed description of
these blocks.
The description of each FC 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.
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 on the Internet at:
http://www.ad.siemens.de/net/html_00/online_zugreifen.htm
SIMATIC NET NCM S7 for Industrial Ethernet
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5-1
Programming Functions (FCs)
5.1
General Notes on FCs
Block Library
The functions (blocks of the type FC) described here are supplied with the
standard STEP 7 package.
The following list shows the numbers of the FCs as they are supplied with the
configuration tool. You can change these numbers. You will also find the following
information on the block library in the SIMATIC Manager:
S
SIMATIC_NET_CP
These blocks are available after installing the NCM S7 for Industrial Ethernet
option. Please note that you must use different FCs for the S7-300 and S7-400.
FC Type 2)
SIMATIC Manager Library
SIMATIC_NET_CP
CP 300
CP 400
FC5
AG_SEND1)
x
x
FC6
AG_RECV1)
x
x
FC7
AG_LOCK
x
x
FC8
AG_UNLOCK
x
x
FC50
AG_LSEND1)
x
x
FC60
AG_LRECV1)
x
x
1)
Note:
The functions FC50 (AG_LSEND) and FC60 (AG_LRECV) can be used with
PROFIBUS CPs as an alternative to FC5 and FC 6. There is no difference in the
interface or the way they function. With Industrial Ethernet, the FCs AG_LSEND
and AG_LRECV can be used to transmit longer data records (>240 bytes to 8
Kbytes). If you use these FCs to transmit larger amounts of data with Ind.
Ethernet, you can also use these blocks for PROFIBUS. Ideally, you should use
these FCs for new applications! On PROFIBUS, however, even if you use these
FCs, you can still only transmit data records up to a maximum of 240 bytes.
2)
Note:
The following descriptions also include information on differences between the
various block versions. Please remember to check the version identifiers of the
subfolders in the SIMATIC_NET_CP block library and the version identifiers of the
blocks themselves. The subfolders CP 300 and CP 400 both contain the new block
versions. You will find older versions of the FCs in separate block folders labeled
with the appropriate version identifiers.
5-2
SIMATIC NET NCM S7 for Industrial Ethernet
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Programming Functions (FCs)
Examples
Apart from the sample calls in this chapter, after you install NCM S7, you will find
samples in the SIMATIC Manager that you can use directly. These examples are
explained in the Primer /3/.
SIMATIC NET NCM S7 for Industrial Ethernet
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5-3
Programming Functions (FCs)
5.2
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)
Note
Calling FCs in the user program: Please note that FCs of one type (for
example, AG_SEND) must not be called at the same time in different priority
classes (OBs). The reason for this is that an FC does not have an interrupt lock.
5.2.1
Parameters for CP and Connection Assignment (input
parameters)
When you call an FC, you transfer the module base address of the Ethernet CP in
the LADDR parameter (see /5/).
Querying the CP Address
You can find out the module base address using the information in /5/ about
slot-oriented address assignment for signal modules. The information about analog
modules applies to the Ethernet CP.
When configuring the CP with the S7 hardware configuration function, the module
base address is displayed in the configuration table.
5-4
SIMATIC NET NCM S7 for Industrial Ethernet
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Programming Functions (FCs)
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.
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. Select the menu command “Connections...” with the right mouse button.
3. Depending on the block type, you can now select the connection intended for
the block or module 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, this is indicated as shown in the table below.
Note
The Ethernet CP is addressed by the SIMATIC S7 PLC as an analog module. This
means that if the addressing is incorrect, error messages occur that cannot be
indicated by the FCs themselves.
Cause
1).
Reaction / Code
The CP address points to a non-existent
CP module or to a digital module.
CPU remains in the STOP mode due to a
system error.
The CP address points to a module with
analog I/Os.
Possible error codes in STATUS:
8184H
System error
80B0H
Module does not
recognize data
record.
80C0H
Data record cannot
be read.
80C3H
Resources
occupied (memory).
80D2H
Logical base address
wrong.
This function is possible only with the block library ..V5.0 SP3 or later.
SIMATIC NET NCM S7 for Industrial Ethernet
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5-5
Programming Functions (FCs)
5.2.2
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 /20/.
5.2.3
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 complete restart or restart of the Ethernet CP (after activating a switch on
the module), the output parameters of the FC are reset as follows:
5-6
S
DONE = 0
S
NDR = 0
S
ERROR = 0
S
STATUS = 8180H for AG_RECV and 8181H for AG_SEND
SIMATIC NET NCM S7 for Industrial Ethernet
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Programming Functions (FCs)
5.3
FCs for Configured Connections
Overview
To transfer data on configured connections, you can use the following FCs:
FC
Meaning
AG_SEND (FC5)
For sending data <= 240 bytes
AG_RECV (FC6)
For receiving data <= 240 bytes
AG_LSEND (FC50)
For sending data1)
AG_LRECV (FC60)
For receiving data1)
1)
Newer versions of the Ethernet CP can transmit larger data areas. Please read the
product information bulletin / manual /1/ of the CP to find out which data area is
supported.
Application
The following diagram illustrates the use of the FCs described here for
bi–directional data transfer on one configured connection.
CPU
Ethernet CP
Ethernet CP
CPU
STEP7
user
program
STEP7
user
program
User data
areas
User data
areas
AG_SEND
send
receive
AG_RECV
send
AG_SEND
Connection
AG_RECV
receive
SIMATIC NET NCM S7 for Industrial Ethernet
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5-7
Programming Functions (FCs)
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 being used.
S
AG_SEND and AG_RECV
With these blocks, you can send or receive up to 240 bytes.
S
AG_LSEND / AG_LRECV
Newer versions of the Ethernet CP can transmit larger data areas. Please
check the length of the data area in the product information.
The following table shows the limit values of the various connection types.
Table 5-1
ISO Transport
ISO-on-TCP
TCP
UDP
AG_LSEND
8192 bytes
8192 bytes
8192 bytes
2048 bytes
AG_LRECV
8192 bytes
8192 bytes
8192 bytes
2048 bytes
Note
Transfer of more than 240 bytes of data is supported by newer CP versions. For
detailed information, refer to the Product Information bulletin of your Ethernet CP.
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.
5-8
SIMATIC NET NCM S7 for Industrial Ethernet
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Programming Functions (FCs)
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 5-1
EBH (low byte)
8EH
28H
03H (high 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 low byte: EBH;
for high byte: 03H.
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!
SIMATIC NET NCM S7 for Industrial Ethernet
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5-9
Programming Functions (FCs)
5.3.1
FCs AG_SEND / AG_LSEND (FC5 / FC50)
Meaning of the Block
FC AG_SEND / AG_LSEND transfers data to the Ethernet CP for transmission on
a configured FDL 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.
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
Explanation
5
:=
:=
:=
:=
:=
:=
:=
:=
//AG_SEND / AG_LSEND block call
M 10.0
MW 11
W#16#0100
P#db99.dbx10.0 byte 240
MW 12
M 10.0
M 10.7
MW 14
=LADDR 256 dec. in hardware configuration
Note
Only FC AG_LSEND can be used for TCP connections!
5-10
SIMATIC NET NCM S7 for Industrial Ethernet
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Programming Functions (FCs)
How the Block Works
The following diagram illustrates the normal sequence of data transmission
triggered in the user program using AG_SEND.
Each AG_SEND job in the user program is acknowledged by the Ethernet CP with
an entry in the output parameters DONE, ERROR and STATUS.
User program
(CPU cycle)
Ethernet CP
Communications Partner
Supply AG_SEND with
data “X”
ACT = 1
AG_SEND
0, 0, 81811)
Transfer
“X”
active on
Ethernet
Supply AG_SEND
ACT = 0
AG_SEND
0, 0, 81811)
AG_SEND
1, 0, 00001)
Time
Time
Time
Legend:
1) parameter transfer DONE, ERROR, STATUS
The status code is updated at each block call. To update the status code without a
new send job, the parameter ACT=0 must be set.
SIMATIC NET NCM S7 for Industrial Ethernet
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5-11
Programming Functions (FCs)
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 ACT=1, LEN bytes are sent from the ISO
transport data area specified with the SEND
parameter.
If 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 ISO transport data area
references either:
– Process image area
– Bit memory
– Data block area
LEN
INPUT
INT
On ISO
Transport and
ISO-on-TCP /
TCP:
Number of bytes to be sent from the ISO
transport data area with this job. The possible
values range from 1 to length specified for the
SEND parameter.
1,2, to 32767
(or up to “length
specified for
SEND
parameter”)
S Remember the block type:
On UDP:
1,2,...2048 (or
up to “length
specified for
SEND
parameter”)
With the FC AG_SEND, the data area is
normally restricted to a maximum of 240
bytes.
S Note on S7-300:
A data transfer with LEN>240 bytes is only
possible when the Ethernet CP was
configured for this in the Properties dialog!
(see Section 2.2.4)
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!
5-12
SIMATIC NET NCM S7 for Industrial Ethernet
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Programming Functions (FCs)
Parameter Declaration
Type
Possible
Values
Remarks
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 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.
Table 5-2
AG_SEND / AG_LSEND Codes
DONE
ERROR
STATUS
Meaning
1
0
0000H
Job completed without error.
0
0
0000H
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 transport 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
8301H
SAP not activated on destination station.
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
8303H
The SDA service (Send Data with Acknowledge) is not supported
on this SAP of the destination station (no SDA with Ethernet).
0
1
8304H
The connection is not established. The send job should only be
attempted again after waiting for at least 100 ms.
SIMATIC NET NCM S7 for Industrial Ethernet
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5-13
Programming Functions (FCs)
Table 5-2
AG_SEND / AG_LSEND Codes
DONE
ERROR
STATUS
Meaning
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
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
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.
5-14
SIMATIC NET NCM S7 for Industrial Ethernet
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Programming Functions (FCs)
5.3.2
FC AG_RECV / AG_LRECV
Meaning of the Block
FC AG_RECV / AG_LRECV accepts the data transferred via 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.
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
:=
:=
:=
:=
:=
:=
:=
DB 100.DBW 1
W#16#0100
P#M 0.0 BYTE 100
DB 100.DBX 0.6
DB 100.DBX 0.7
DB 100.DBW 2
DB 100.DBW 4
Note
Only FC AG_LRECV can be used for TCP connections!
SIMATIC NET NCM S7 for Industrial Ethernet
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5-15
Programming Functions (FCs)
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.
User program
(CPU cycle)
Ethernet CP
Communications Partner
Transfer
“A”
active on
Ethernet
AG_RECV
0, 1, 8180 1)
AG_RECV
1, 0, 00001)
Accept / evaluate
received data “A”
Transfer
“B”
active on
Ethernet
AG_RECV
0, 0, 81801)
AG_RECV
1, 0, 00001)
Accept / evaluate
received data “B”
Transfer
“C”
active on
Ethernet
AG_RECV
.
.
.
Time
Time
Time
Legend:
1) Parameter transfer NDR, ERROR, STATUS
The status code is updated at each block call.
5-16
SIMATIC NET NCM S7 for Industrial Ethernet
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Programming Functions (FCs)
Explanation of the Formal Parameters
The following table explains all the formal parameters for the AG_RECV /
AG_LRECV function.
Parameter Declaration
Type
ID
INPUT
INT
LADDR
INPUT
WORD
Possible
Values
1,2...16
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 ISO transport data area
references either:
– 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.
LEN
OUTPUT
INT
On ISO
Transport and
ISO-on-TCP:
Specifies the number of bytes accepted from
the Ethernet CP and entered in the ISO
transport data area.
1,2...8192
S Remember the block type:
On UDP:
With the FC AG_RECV, the data area is
normally restricted to a maximum of 240
bytes.
1,2...2048
SIMATIC NET NCM S7 for Industrial Ethernet
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5-17
Programming Functions (FCs)
Condition Codes
The following table shows the codes formed by the DONE, ERROR and STATUS
parameters that must be evaluated by the user program.
Table 5-3
AG_RECV / AG_LRECV Codes
NDR
ERROR
STATUS
Meaning
1
0
0000H
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)
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 1st act. data block.
0
1
8F31H
Parameter is in the write-protected 2nd act. 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
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.
5-18
SIMATIC NET NCM S7 for Industrial Ethernet
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Programming Functions (FCs)
Table 5-3
AG_RECV / AG_LRECV Codes
NDR
ERROR
STATUS
Meaning
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.
SIMATIC NET NCM S7 for Industrial Ethernet
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5-19
Programming Functions (FCs)
5.4
FCs for Access Coordination with FETCH/WRITE
Overview
For the FETCH/WRITE functions, the following FCs are available for access
coordination:
FC
AG_LOCK
AG_UNLOCK
Meaning
Locks external data access with
FETCH/WRITE.
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.
5-20
SIMATIC NET NCM S7 for Industrial Ethernet
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Programming Functions (FCs)
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
FETCH/WRITE
Cycle n+2
LOCKED = 1
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.
SIMATIC NET NCM S7 for Industrial Ethernet
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5-21
Programming Functions (FCs)
5.4.1
FC 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
ID
LADDR
STATUS
LOCKED
Explanation
7
:=
:=
:=
:=
DB 100.DBW 1
W#16#0100
DB 100.DBW 2
DB 100.DBX 0.6
Explanation of the Formal Parameters
The following table explains all the formal parameters for the AG_LOCK function:
5-22
SIMATIC NET NCM S7 for Industrial Ethernet
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Programming Functions (FCs)
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 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.
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 5-4
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)
SIMATIC NET NCM S7 for Industrial Ethernet
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5-23
Programming Functions (FCs)
5.4.2
FC 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
LADDR
:=
STATUS :=
Explanation
DB 100.DBW 1
W#16#0100
DB 100.DBW 2
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:
5-24
SIMATIC NET NCM S7 for Industrial Ethernet
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Programming Functions (FCs)
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 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.
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 5-5
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)
SIMATIC NET NCM S7 for Industrial Ethernet
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5-25
Programming Functions (FCs)
5-26
SIMATIC NET NCM S7 for Industrial Ethernet
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NCM S7 Diagnostics
6
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”.
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6-1
NCM S7 Diagnostics
6.1
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.
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 from Chapter 2 about handling
NCM S7. 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:
6-2
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”.
SIMATIC NET NCM S7 for Industrial Ethernet
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NCM S7 Diagnostics
6.2
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
SIMATIC NET NCM S7 for Industrial Ethernet
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6-3
NCM S7 Diagnostics
6.2.1
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).
6-4
SIMATIC NET NCM S7 for Industrial Ethernet
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NCM S7 Diagnostics
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.
Working in the Dialog
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.
SIMATIC NET NCM S7 for Industrial Ethernet
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6-5
NCM S7 Diagnostics
6.2.2
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 6-1
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 CP
Stops the CP.
Start CP
Starts the CP if the RUN/STOP switch is set to RUN.
Reset CP
With certain CP types, for example the CP 443-5 Basic, you can reset the
CP memory. This function must be confirmed before it is executed.
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.
You can set the interval between update points with the menu command
Options " Customize.
Options " Customize
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.
S Show TSAP in ASCII
You can decide whether the TSAP is shown in ASCII or hexadecimal in
the following tab page dialogs.
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.
6-6
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NCM S7 Diagnostics
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.
SIMATIC NET NCM S7 for Industrial Ethernet
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6-7
NCM S7 Diagnostics
6.3
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
S
Industrial Ethernet TCP/IP
S
PROFIBUS
Starting Diagnostics from the NCM Program Group
If there are no configuration data on your PG/PC, follow the steps outlined below to
start diagnostics with a connected CP:
1. Select the function “NCM Diagnostics” in the NCM S7 program group.
NCM S7 Diagnostics is started with the message “No online connection to the
CP” in the contents area.
2. Select the “Diagnostics "Open Online Connection...” menu command.
3. 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 6-2
Possible Settings for the Online Paths – without Parameters for Internetworking
Attachment on
Destination Station
MPI
Node Address
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
6-8
PROFIBUS address of the
PROFIBUS CP via which the S7
station is reached.
Rack/slot no. of the CP to be
checked.
SIMATIC NET NCM S7 for Industrial Ethernet
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NCM S7 Diagnostics
Table 6-2
Possible Settings for the Online Paths – without Parameters for Internetworking
Attachment on
Destination Station
Industrial Ethernet
Industrial Ethernet
TCP/IP
Node Address
Location of the Module
Rack / Slot
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.
Entered in decimal.
Example:
IP address decimal 142.120.9.134
If you specify “0/0”, the CP specified
with the node address is accessed
directly.
Internetworking
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.
Starting Diagnostics from the Properties Dialog of the CP
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.
SIMATIC NET NCM S7 for Industrial Ethernet
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6-9
NCM S7 Diagnostics
Other Startup Options
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.
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).
6-10
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NCM S7 Diagnostics
6.4
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:
Begin NCM S7 Diagnostics:
– Establish connection to the CP (Section 6.3
– Make the required settings (See Section 6.2.2))
– Identify the Ethernet CP
Query the current status of the CP
”Operating Mode” tab”
If the CP is not
in the RUN mode
If the CP is in the RUN mode
TCP connection
ISO transport connection/
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. Pinpoint your problem or task, for example based on the checklist in Section 6.6
and select the diagnostic function you require based on the recommendation in
the list.
SIMATIC NET NCM S7 for Industrial Ethernet
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6-11
NCM S7 Diagnostics
6.5
Call-Specific Diagnostic Functions
The following table shows the diagnostic options that exist in the available
functions.
Table 6-3
General Diagnostic and Statistical Functions
Diagnostic Aims
Diagnostic
Functions /
Diagnostic Object
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 Ethernet and, if necessary, to modify
the mode (menu command Operating
Mode"Stop CP/Start CP).
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.
Table 6-4
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
6-12
By double-clicking the objects in the
contents area, you can display detailed
information.
SIMATIC NET NCM S7 for Industrial Ethernet
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NCM S7 Diagnostics
Table 6-4
Mode-Dependent Functions, continued
Diagnostic
Functions /
Diagnostic Object
Connections "
Type
Diagnostic Aims
Special Features
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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6-13
NCM S7 Diagnostics
6.6
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.
6-14
SIMATIC NET NCM S7 for Industrial Ethernet
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NCM S7 Diagnostics
6.6.1
Checklist for General CP Functions
Table 6-5
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
The maximum number of entries for ISO
transport connections was exceeded
Further 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
SIMATIC NET NCM S7 for Industrial Ethernet
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6-15
NCM S7 Diagnostics
6.6.2
Communication Connections Checklist
Table 6-6
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.
Identifying the Cause and Remedy
Check the user program.
Evaluate status bytes in AG-SEND and
AG-RECV.
or
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.
-
6-16
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Firmware Loader
7
This chapter will familiarize with the uses and handling of the Firmware Loader.
The firmware loader allows you to download more recent firmware versions to the
SIMATIC NET CPs.
SIMATIC NET NCM S7 for Industrial Ethernet
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7-1
Firmware Loader
7.1
Application
Firmware
Here, firmware means the system programs in the SIMATIC NET CPs.
Uses of the Firmware Loader
The firmware loader allows you to download more recent firmware versions to the
SIMATIC NET CPs. It is used on the following:
S
PROFIBUS CPs
S
Industrial Ethernet CPs
Installation
The firmware loader is available when you have installed NCM on your PG/PC.
Load Files
The firmware loader supports the following file types:
S
<file>.LAD
A file form containing only the system program that can be downloaded to the
CP.
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.
For detailed information, read the documentation, for example, the README file
shipped with the load file.
Working with the Firmware Loader
Depending on the CP 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.
7-2
SIMATIC NET NCM S7 for Industrial Ethernet
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Firmware Loader
7.2
Loading Firmware
Starting the Download
Start the program from the Windows standard Start menu using the SIMATIC
"NCM S7 " Firmware Loader menu command.
Select the Next button and follow the instructions displayed in the dialog.
1st Step
Select the firmware to be downloaded using the Browse... button.
The text box for selecting files also displays a list box in which the last ten selected
load files are displayed and can be selected.
With FWL load files, the comment box may also contain additional information
about the file.
!
Caution
Make sure that the load file you are using is intended as an update for the version
of the firmware contained on your CP. If you are in any doubt, contact your local
Siemens advisor.
SIMATIC NET NCM S7 for Industrial Ethernet
C79000-G8976-C129/04
7-3
Firmware Loader
2nd Step
Select the interface via which you want to download the firmware.
The interface type (PROFIBUS or Industrial Ethernet) is already decided by the
load file you selected.
S
For a PROFIBUS CP:
There are no further settings in this dialog; go to the next step.
S
For an Industrial Ethernet CP:
Select or specify the MAC address of the Ethernet CP and go to the next step.
Note
The following applies to an Industrial Ethernet CP:
If a download was previously aborted to the particular CP you must click the
Emergency Address button. In this case, it is assumed that there was a memory
reset on the CP which is now only accessible using an emergency address.
With newer CPs (order number 6GK7 x43-1EX11-0XE0 and later), a fixed MAC
address assigned to the CP is used instead of an emergency address. Please
refer to the information in the relevant manual /1/ on the topic of “Downloading
New Firmware”.
3rd Step
Check the configuration.
You can check and adjust settings for the PG/PC interface using the Modify...
button.
Set the PG/PC interface according to the CPs available on your PG (list box
“Device Parameter Sets”) and according to the bus attachment (list box
“Properties”).
For more detailed information, refer to the integrated help system.
Continue to follow the instructions in the dialog to establish the connection to the
Ethernet CP.
7-4
SIMATIC NET NCM S7 for Industrial Ethernet
C79000-G8976-C129/04
Firmware Loader
!
Caution
Remember that interrupting the download can lead to an inconsistent state on the
CP.
With Industrial Ethernet, please note the instruction in the second step for
displaying the emergency address.
Using the Modify... button, you can set the PG/PC interface back to its original
values.
For more detailed information, refer to the integrated help system.
-
SIMATIC NET NCM S7 for Industrial Ethernet
C79000-G8976-C129/04
7-5
Firmware Loader
7-6
SIMATIC NET NCM S7 for Industrial Ethernet
C79000-G8976-C129/04
References
A
/1/
Product informationen 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
Part of the online documentation in the STEP 7 optional package NCM
SIEMENS AG
/3/
NCM S7 for Industrial Ethernet Primer
Part of the documentation package NCM S7 for Industrial Ethernet
Part of the online documentation in the STEP 7 optional package NCM
SIEMENS AG
/4/
SIMATIC NET IT-CP, Manual
Part of the documentation package NCM S7 for Industrial Ethernet
SIEMENS AG
/5/
SIMATIC STEP 7 Configuring Hardware with STEP 7
Part of the standard STEP 7 Documentation Package
Part of the online documentation in STEP 7
SIEMENS AG
/6/
SIMATIC Communication with SIMATIC
Manual
SIEMENS AG
SIMATIC NET NCM S7 for Industrial Ethernet
C79000-G8976-C129/04
A-1
References
/7/
SIMATIC STEP 7 Programming with STEP 7
Part of the standard STEP 7 Documentation Package
Part of the online documentation in STEP 7
SIEMENS AG
/8/
SIMATIC STEP 7 Reference Manual Documentation Package
SIEMENS AG
/9/
SIMATIC NET Industrial Twisted Pair Networks
SIEMENS AG
/10/
Ethernet, IEEE 802.3
(ISO 8802-3)
/11/
SINEC CP 1413
Manuals for MS-DOS, Windows
SIEMENS AG
/12/
SIMATIC S7
S7-300 Programmable Controller
Hardware and Installation
Manual
SIEMENS AG
/13/
SIMATIC NET Manual for Triaxial Networks
SIEMENS AG
/14/
SIMATIC NET Ethernet Manual
SIEMENS AG
A-2
SIMATIC NET NCM S7 for Industrial Ethernet
C79000-G8976-C129/04
References
/15/
Lokale Netze –
Kommunikationsplattform der 90er Jahre
Andreas Zenk
Addison–Wesley
ISBN 3-89319-567-X
/16/
TCP/IP
Internet-Protokolle im professionellen Einsatz
Mathias Hein
International Thomson Publishing
ISBN 3-8266-400-4
ITP Online-Center: http://www.ora.de
/17/
RFC1006 (Request For Comment)
/18/
RFC793 (TCP)
/19/
RFC791 (IP)
/20/
Berger, Hans
Automation with STEP 7
SIMATIC S7-300/400 Programmable Logic Controllers
Order Numbers
The order numbers for the SIEMENS documentation listed above can be found in
the catalogs “SIMATIC NET Industrial Communication, Catalog IK10” 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.
SIMATIC NET NCM S7 for Industrial Ethernet
C79000-G8976-C129/04
A-3
References
A-4
SIMATIC NET NCM S7 for Industrial Ethernet
C79000-G8976-C129/04
Glossary
B
B.1
General Section . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
B-2
B.2
Ethernet . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
B-5
SIMATIC NET NCM S7 for Industrial Ethernet
C79000-G8976-C129/04
B-1
Glossary
B.1
General Section
Baud rate
–> transmission rate
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)
FC
STEP 7 logic block of the type “function”.
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.
B-2
SIMATIC NET NCM S7 for Industrial Ethernet
C79000-G8976-C129/04
Glossary
Frame Trailer
A frame trailer consists of a checksum and the end identifier of the –> frame.
Gateway
Intelligent connectivity device that connects local area–> networks of different
types at the ISO Layer 7 level.
Industrial Ethernet
A fieldbus complying with IEEE 802.3 (ISO 8802–2)
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
–> stations. Several networks can exist side by side.
PG Mode
A mode of the PROFIBUS/Ethernet CP in which the SIMATIC S7-CPU is
programmed, configured or checked via PROFIBUS/Ethernet.
This mode is handled by the S7 functions.
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.
Protocol
A set of rules for transferring data. Using these rules, both the formats of the
frames and the data flow are specified.
SIMATIC NET NCM S7 for Industrial Ethernet
C79000-G8976-C129/04
B-3
Glossary
Segment
Synonym for –> bus segment.
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.
Services
Services provided by a communication protocol.
SIMATIC NET
Siemens SIMATIC Network and Communication. Product name for–> networks
and network components from Siemens (previously SINEC).
SIMATIC NET for Ind. Ethernet
SIMATIC NET bus 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
S
MAC address in the Ethernet network.
S
PROFIBUS address in the PROFIBUS network.
Subnet
A subnet is part of a –> network whose parameters (for example –> PROFIBUS)
must be matched. It includes the bus components and all 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).
B-4
SIMATIC NET NCM S7 for Industrial Ethernet
C79000-G8976-C129/04
Glossary
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.
Transmission Rate
According to DIN 44302, this is the number of binary decisions transmitted per
time unit. The set or selected transmission rate depends on various conditions, for
example the distance across the network. In Ethernet, there is a fixed transmission
rate of 10 Mbps.
Transport Interface
The transport interface of a SIMATIC S5 PLC is the access to the
connection-oriented services of the transport layer on the CP. The transport
interface presents itself to the control program in the form of handling blocks
(HDBs).
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.
TSAP
Transport Service Access Point
Watchdog
Mechanism for monitoring operability.
SIMATIC NET NCM S7 for Industrial Ethernet
C79000-G8976-C129/04
B-5
Glossary
B.2
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.
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
S
SIMATIC S7 PLC with Ethernet CP
S
SIMATIC S5 PLC with Ethernet CP
S
PC/PG with Ethernet CP
S
any system
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 with an Ethernet CP
S
SIMATIC S5 with an Ethernet CP (e.g. CP 143 or CP 1430)
S
PC/PG with an Ethernet CP (e.g. CP 1413)
S
Any system via the ISO transport protocol (ISO 8073)
The transfer of blocks of data on an ISO transport connection is bi-directional.
B-6
SIMATIC NET NCM S7 for Industrial Ethernet
C79000-G8976-C129/04
Glossary
MAC Address
Address to distinguish between different nodes connected to a common
transmission medium (Ethernet).
Media Access Control (MAC)
Mechanisms for controlling access by a station to a common transmission medium
shared with other stations.
RFC 1006
see ISO on TCP
Station (Ind. Ethernet)
A station is identified by a –> MAC address in the –> Ethernet (SINEC H1)
network.
Subnet Mask
The subnet mask specifies which parts of an IP address are assigned to the
network number (see ISO-on-TCP). 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.
TCP/IP
TCP = Transport Connection Protocol; IP = Internet Protocol
UDP
User Datagram Protocol: datagram service for simple internetwork transmission
without acknowledgment.
q
SIMATIC NET NCM S7 for Industrial Ethernet
C79000-G8976-C129/04
B-7
Glossary
B-8
SIMATIC NET NCM S7 for Industrial Ethernet
C79000-G8976-C129/04
Linking to Other Systems with
FETCH/WRITE
C
The FETCH and WRITE modes supported on ISO transport connections and
ISO-on-TCP connections can be used with any other system 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.
SIMATIC NET NCM S7 for Industrial Ethernet
C79000-G8976-C129/04
C-1
Linking to Other Systems with FETCH/WRITE
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 S field
=03
8 ORG ID
8 Error no
=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
C-2
SIMATIC NET NCM S7 for Industrial Ethernet
C79000-G8976-C129/04
Linking to Other Systems with FETCH/WRITE
b) 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 no
=Nr
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
SIMATIC NET NCM S7 for Industrial Ethernet
C79000-G8976-C129/04
C-3
Linking to Other Systems with FETCH/WRITE
Parameter Values
S7 Address Area
ORG ID
C-4
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
SIMATIC NET NCM S7 for Industrial Ethernet
C79000-G8976-C129/04
Linking to Other Systems with FETCH/WRITE
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
SIMATIC NET NCM S7 for Industrial Ethernet
C79000-G8976-C129/04
C-5
Linking to Other Systems with FETCH/WRITE
C-6
SIMATIC NET NCM S7 for Industrial Ethernet
C79000-G8976-C129/04
D
SIMATIC NET – Support and Training
Customer Support, Technical Support
Open round the clock, worldwide:
Nuremberg
Johnson City
Singapore
SIMATIC Hotline
Worldwide (Nuremberg)
Worldwide (Nuremberg)
Technical Support
Technical Support
(FreeContact)
(charged only with SIMATIC Card)
Local time: Mo.-Fr. 0:00 to 24:00
Local time: Mo.-Fr. 7:00 to 17:00
Phone:
Phone:
+49 (180) 5050-222
Fax:
+49 (911) 895-7001
Fax:
+49 (180) 5050-223
GMT:
+01:00
E–mail:
techsupport@
ad.siemens.de
+1:00
GMT:
+49 (911) 895-7777
Europe / Africa (Nuremberg)
America (Johnson City)
Asia / Australia (Singapore)
Authorization
Technical Support and
Authorization
Technical Support and
Authorization
Local time: Mo.-Fr. 7:00 to 17:00
Local time: Mo.-Fr. 8:00 to 19:00
Local time: Mo.-Fr. 8:30 to 17:30
Phone:
+49 (911) 895-7200
Phone:
+1 423 461-2522
Phone:
Fax:
+49 (911) 895-7201
Fax:
+1 423 461-2289
Fax:
+65 740-7001
E–mail:
authorization@
nbgm.siemens.de
+1:00
E–mail:
simatic.hotline@
sea.siemens.com
-5:00
E–mail:
simatic.hotline@
sae.siemens.com.sg
+8:00
GMT:
GMT:
GMT:
+65 740-7000
The languages spoken on the hotlines are German and English. On the authorization hotline, French, Italian and Spanish are also available.
SIMATIC NET NCM S7 for Industrial Ethernet
C79000-G8976-C129/04
D-1
SIMATIC NET – Support and Training
Training Center
To help you to become familiar with working with SIMATIC S7 PLCs, we offer a
range of courses. Please contact your regional training center or the central
training center in D 90327 Nuremberg.
Tel. + 49–911–895–3154
Infoline: Tel. +49 180 523 5611 (48 Pfg./min), Fax. 0180 523 5612
Internet:
http://www.ad.siemens.de/training
E-mail:
AD–Training@nbgm.siemens.de
Technical Support Online Services
The SIMATIC Customer Support team provides you with comprehensive additional
information on SIMATIC products in its online services:
S
You can obtain the latest information
– On the Internet at http://www.ad.siemens.de/net
– Using the Fax-Polling no. 08765-93 02 77 95 00
S
Current Product Information leaflets and downloads which you may find useful
for your product are available:
– On the Internet at http://www.ad.siemens.de/csi/net
– Via the Bulletin Board System (BBS) in Nuremberg (SIMATIC Customer
Support Mailbox) at the number +49 (911) 895–7100.
To access the mailbox, use a modem with V.34 (28.8 Kbps) capability whose
parameters you should set as follows: 8, N, 1, ANSI, or dial in using ISDN
(x.75, 64 Kbps).
Further Support
If you have further questions about SIMATIC NET products, please contact your
local Siemens representative.
You will find the addresses:
S
In our catalog IK PI
S
On the Internet (http://www.ad.siemens.de)
-
D-2
SIMATIC NET NCM S7 for Industrial Ethernet
C79000-G8976-C129/04
A
Access coordination, 5-20
Address parameters
broadcast, 4-52
unspecified ISO-on-TCP connection, 4-32
unspecified TCP connection, 4-41
unspecified UDP connection, 4-51
AS-Interface, 1-2
B
Broadcast, with UDP, 4-49
C
Communication options, 1-3
Communication services, configuring, 2-16
Configuration data, downloading to the PLC,
2-17
Connection, properties, 4-4
Connection configuration, 4-3
CP address, 5-2
CP configuration data, saving, 2-18
Creating a subnet, 2-4
CSMA/CD, 1-2
FETCH/WRITE services
configuration for ISO-on-TCP, 4-33
configuration for ISO transport, 4-23
configuration for TCP, 4-42
overview, 1-15
Firmware Loader, 7-1
application, 7-2
loading firmware, 7-3
Functions
AG-RECV, 3-2, 3-4
AG-SEND, 3-2, 3-4
Functions (FCs)
AG_LOCK, 5-22
AG_LOCK / AG_UNLOCK, 5-20
AG_RECV / AG_LRECV, 5-15
AG_SEND / AG_LSEND, 5-10
AG_UNLOCK, 5-24
block number, 5-2
for configured connections, 5-7
general notes, 5-2
typical sequence, 3-5
Further functions, 4-11
H
Hardware configuration, Ethernet CP, 2-6
D
I
Diagnostics, 2-12
Displaying network attachments, 2-8
Dynamic properties, 4-21
Industrial Ethernet, overview, 1-2
ISO transport connection, 4-15
amount of data and number of connections,
4-4
checking, 4-25
connection without assignment, 4-12
dynamic properties, 4-21
printing configured connections, 4-11
properties dialog, 4-15
addresses, 4-19
dynamics, 4-21
general, 4-16
overview, 4-25
save connection, 4-11
unspecified connection, 4-20
E
Ethernet, overview, 1-2
Ethernet CP
further CP properties, 2-10
time, 2-11
installing and starting, 2-1
procedure, 2-3
F
FCs for access coordination with
FETCH/WRITE, 5-20
SIMATIC NET NCM S7 for Industrial Ethernet
C79000-G8976-C129/04
Index-1
ISO-on-TCP connection
addresses, 4-30
checking, 4-35
properties, 4-27
specifying the partner, 4-28
J
Job header, 5-8
N
NCM S7
general information, 2-2
installation, 2-2
NCM S7 Diagnostics, 6-1
overview, 6-2
Network access, 1-2
New connection, 4-7, 4-8
O
Operator interface devices, 1-9, 1-10
Other station, 1-16, 4-9
configuring, 2-13
connecting a subnet, 2-14
R
Routing, 4-56
S
S7 communication on Ethernet, 1-3, 1-10
S7 communication relay, 1-3, 1-10
S7 functions, 1-3
SEND/RECEIVE interface, 1-3
CPU cycle, 3-7
data exchange, 3-2
overview, 1-12
user program, 3-4
SIMATIC NET, 1-2
System memory, access using
FETCH/WRITE, 4-24, 4-34, 4-43
T
TCP connection, 4-36
addresses, 4-39
checking properties, 4-44
specifying the partner, 4-37
Type of communication, 1-3
U
P
PG operation
with STEP 7 on Ethernet, 1-8
with STEP 7 via Ethernet, 1-6
PG/PC interface, 1-10
PROFIBUS, 1-2
Project variant
1 subnet – 1 project, 1-18
1 subnet – more than 1 project, 1-21
2 or more subnets – 1 project, 1-20
more than 1 subnet – more than 1 project,
1-22
several subnets several projects, 1-23
SIMATIC S5 and non-SIMATIC devices,
1-19
Index-2
UDP
addresses, 4-49
checking, 4-53
configuring, 4-46
specifying connection partners, 4-47
Unspecified connection, 4-9
SIMATIC NET NCM S7 for Industrial Ethernet
C79000-G8976-C129/04