Siemens 300Series Specifications

Preface, Contents
SIMATIC
PLC S7-300,
CPU Specifications CPU 312 IFM
to CPU 318-2 DP
Reference Manual
CPUs
1
CPU 31x-2 as DP Master/DP
Slave and Direct Communication
2
Cycle and Reaction times
3
CPU Function, depending on
CPU and STEP 7 Version
4
Tips and Tricks
5
Appendix
Standards, Certificates and
Approvals
A
Dimensioned Drawings
B
List of Abbreviations
C
Glossary, Index
This documentation can no longer be ordered under
the given number!
This manual is part of the documentation
package with the order number
6ES7398-8FA10-8BA0
Edition 10/2001
A5E00111190-01
Safety Guidelines
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connected equipment against damage. These notices are highlighted by the symbols shown below and
graded according to severity by the following texts:
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!
!
Danger
indicates that death, severe personal injury or substantial property damage will result if proper precautions
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Warning
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Caution
indicates that minor personal injury can result if proper precautions are not taken.
Caution
indicates that property damage can result if proper precautions are not taken.
Notice
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.
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Postfach 4848, D- 90327 Nuernberg
Index-2Aktiengesellschaft
Siemens
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 2001
Technical data subject to change.
PLC S7-300, CPU Specifications CPU 312 IFM to CPU 318-2 DP
A5E00111190-01
A5E00111190
Preface
Purpose of the Manual
This manual gives you a brief overview of 312 IFM to 318-2 CPUS in an S7-300.
You can look up information on how to operate the system, its functions and
technical data of the CPUs.
Essential know-how
General knowledge of automation technology is required for comprehension of this
Manual. You should also be acquainted with basic STEP 7 software as described
in your Programming with STEP 7 V 5.1 Manual.
PLC S7-300, CPU Specifications CPU 312 IFM to CPU 318-2 DP
A5E00111190-01
iii
Preface
Scope of the Manual
The manual covers the following CPUs and Hardware/Software versions:
CPU
CPU 312 IFM
As of Version
Order No.
6ES7 312-5AC02-0AB0
Firmware
Hardware
1.1.0
01
6ES7 312-5AC82-0AB0
CPU 313
6ES7 313-1AD03-0AB0
1.1.0
01
CPU 314
6ES7 314-1AE04-0AB0
1.1.0
01
6ES7 314-1AE84-0AB0
CPU 314 IFM
6ES7 314-5AE03-0AB0
6ES7 314-5AE83-0AB0
1.1.0
01
CPU 314 IFM
6ES7 314-5AE10-0AB0
1.1.0
01
CPU 315
6ES7 315-1AF03-0AB0
1.1.0
01
CPU 315-2 DP
6ES7 315-2AF03-0AB0
6ES7 315-2AF83-0AB0
1.1.0
01
CPU 316-2 DP
6ES7 316-2AG00-0AB0
1.1.0
01
CPU 318-2
6ES7 318-2AJ00-0AB0
V3.0.0
03
This manual describes all modules that are valid at the time the manual is
released. We reserve the right to release product information for new modules or
new module versions.
Alterations from Previous Version
The following changes were made in the Structuring, CPU Data Manual, Order no.
6ES7398-8AA03-8BA0, Edition 2:
Now, this manual only contains the CPU description. For information on the
S7-300 structure and installation refer to the Installation Manual.
CPU 318-2 DP as of Firmware Version V3.0.0 behaves as DP Master according
to PROFIBUS DPV1.
Agreement for CPU 314IFM
The CPU 314IFM is available in 2 versions:
with slot for Memory Card
(6ES7314-5EA10-0AB0)
without slot for Memory Card
(6ES7314-5EA0x-0AB0)
All details in this chapter apply to both versions of CPU 314IFM, unless explicit
reference is made to differences between them.
iv
PLC S7-300, CPU Specifications CPU 312 IFM to CPU 318-2 DP
A5E00111190-01
Preface
Approbation, Standards and Approvals
The SIMATIC S7-300 series conforms to:
Requirements and criteria to IEC 61131, Part 2
CE labeling
– EC Guideline 73/23/EEC on Low Voltages
– EC Guideline 89/336/EEC on electromagnetic compatibility (EMC)
Canadian Standards Association: CSA C22.2 Number 142, tested (Process
Control Equipment)
Underwriters Laboratories, Inc.: UL 508 registered (Industrial Control
Equipment)
Underwriters Laboratories, Inc.: UL 508 (Industrial Control Equipment)
Factory Mutual Research: Approval Standard Class Number 3611
C-Tick Australia
PLC S7-300, CPU Specifications CPU 312 IFM to CPU 318-2 DP
A5E00111190-01
v
Preface
Integration in the Information Technology Environment
This Manual forms part of the S7-300 documentation package:
You are reading this manual
Reference Manual “CPU Data”
CPU Data of CPU 312 IFM to 318-2 DP
Description on how to operate, of the functions
and of technical data of the CPU
CPU Data of CPU 312C to 314C-2 PtP/DP
“Technological Functions” Manual
Manual
Description of specific technological
functions:
Samples
Positioning
Counting
Point-to-point connection
Rules
The CD contains examples of
technological functions
Installation Manual
Description of how to create a project and how
to install, wire, network and commission an
S7-300
Manual
Reference Manual “Module Data”
Manual
Description and technological details
of signal modules, power supply
modules and interface modules
Operations List
“CPU 312 IFM, 314 IFM, 313, 315,
315-2 DP, 316-2 DP, 318-2 DP”
List of the CPU’s system resources and
their execution times.
Listing of all runtime function blocks
(OBs/SFCs/SFBs) and their execution times
“CPUs 312C to 314C-2 PtP/DP
Getting Started
“CPU 31xC:Positioning with Analog Output”
“CPU 31xC: Positioning with Digital Outputs”
the various Getting Started manuals offer help
for commissioning your applications
“CPU 31xC: Counting”
“CPU 31xC: Point-to-point Communication
“CPU 31xC: Controlling”
“CPU 31xC:
“S7-300”
Figure 1-1
vi
S7-300, information technology environment
PLC S7-300, CPU Specifications CPU 312 IFM to CPU 318-2 DP
A5E00111190-01
Preface
Complementary to this documentation package you require the following manuals:
Manual
“Integrated Functions CPU 312 IFM/314 IFM”
Description of technological functions of the
CPUs 312 IFM/314 IFM.
Manual
Order no.: 6ES7398-8CA00-8BA0
Reference Manual “System Software for
S7-300/400 System and Standard Functions”
Reference manual
Part of the STEP 7 documentation package,
order no. 6ES7810-4CA05-8BR0
Figure 1-2
Description of the SFCs, SFBs and OBs of the
CPUs. This description is also available in the
STEP 7 Online Help.
Additional Documentation
Further Support
Please contact your local Siemens representative if you have any queries about
the products described in this manual.
http://www.ad.siemens.de/partner
Training Center
Newcomers to SIMATIC S7 PLCs are welcome to take part in our respective
training courses. Please contact your local Training Center, or the central Training
Center in D-90327 Nuremberg, Germany:
Phone:
+49 (911) 895-3200.
http://www.sitrain.com
PLC S7-300, CPU Specifications CPU 312 IFM to CPU 318-2 DP
A5E00111190-01
vii
Preface
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Authorization Hotline are French, Italian and Spanish.
viii
PLC S7-300, CPU Specifications CPU 312 IFM to CPU 318-2 DP
A5E00111190-01
Preface
SIMATIC Documentation on the Internet
Documentation is available free of charge on the Internet under:
http://www.ad.siemens.de/support
Please use the Knowledge Manager offered at these locations for quick location of
your required documentation. Our Internet Forum offers a “Documentation”
conferencing room for your questions and solution proposals.
http://www.ad.siemens.de/support
Service & Support on the Internet
As a supplement to our provided documentation we offer our complete know-how
base on the Internet.
http://www.ad.siemens.de/support
There you will find:
Up-to-date product information (News), FAQs (Frequently Asked Questions),
Downloads, Tips and Tricks.
Our Newsletter always offers you the most up-to-date information on your
products.
The Knowledge Manager finds the right documents for you.
Users and specialists across the globe share their experiences in our Forum.
Your local service partner for Automation & Drives is found in our Service
Partner Database.
Information relating to on–site Service, repairs, spare parts and lots more is
available to you under the topic “Service”.
PLC S7-300, CPU Specifications CPU 312 IFM to CPU 318-2 DP
A5E00111190-01
ix
Preface
x
PLC S7-300, CPU Specifications CPU 312 IFM to CPU 318-2 DP
A5E00111190-01
Contents
1
2
CPUs
1.1
1.1.1
1.1.2
1.1.3
1.1.4
1.1.5
1.1.6
Control and Display Elements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Status and Fault Displays . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Mode Selector Switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Backup battery/accumulator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Memory card . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
MPI and PROFIBUS-DP Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Clock and Runtime Meter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1-2
1-3
1-4
1-5
1-6
1-7
1-10
1.2
Communication Options of the CPU . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1-11
1.3
1.3.1
1.3.2
1.3.3
Test Functions and Diagnostics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Testing Functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Diagnostics with LED Display . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Diagnostics with STEP 7 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1-19
1-19
1-22
1-22
1.4
1.4.1
1.4.2
1.4.3
1.4.4
1.4.5
1.4.6
1.4.7
1.4.8
CPUs - Technical Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
CPU 312 IFM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
CPU 313 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
CPU 314 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
CPU 314IFM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
CPU 315 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
CPU 315-2 DP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
CPU 316-2 DP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
CPU 318-2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1-24
1-25
1-37
1-40
1-43
1-60
1-63
1-66
1-69
CPU 31x-2 as DP Master/DP Slave and Direct Communication
2.1
Information on DPV1 Functionality . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2-2
2.2
DP Address Areas of the CPUs 31x-2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2-4
2.3
CPU 31x-2 as DP Master . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2-5
2.4
Diagnostics of the CPU 31x-2 as DP Master . . . . . . . . . . . . . . . . . . . . . . . .
2-6
2.5
CPU 31x-2 as DP-Slave . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2-13
PLC S7-300, CPU Specifications CPU 312 IFM to CPU 318-2 DP
A5E00111190-01
xi
Contents
3
4
2.6
2.6.1
2.6.2
2.6.3
2.6.4
2.6.5
2.6.6
2.6.7
2.6.8
2.6.9
2.6.10
Diagnosis of the CPU 31x-2 operating as DP-Slave . . . . . . . . . . . . . . . . . .
Diagnosis with LEDs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Diagnostics with STEP 5 or STEP 7 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Reading Out the Diagnostic Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Format of the Slave Diagnostic Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Station Status 1 to 3 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Master PROFIBUS Address . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Manufacturer ID . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Module Diagnostics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Station Diagnostics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Interrupts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2-18
2-19
2-19
2-20
2-24
2-25
2-27
2-27
2-28
2-29
2-31
2.7
Direct Data Exchange . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2-32
2.8
Diagnosis with Direct Communication . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2-33
Cycle and Reaction times
3.1
Cycle time . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3-2
3.2
Response Time . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3-3
3.3
Calculation Examples for Cycle Time and Response Time . . . . . . . . . . . .
3-10
3.4
Interrupt response time . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3-14
3.5
Calculation Example for the Interrupt Response Time . . . . . . . . . . . . . . . .
3-16
3.6
Reproducibility of Delay and Watchdog Interrupts . . . . . . . . . . . . . . . . . . . .
3-16
CPU Function, depending on CPU and STEP 7 Version
4.1
Differences between CPU 3182 and CPUs 312 IFM to 3162 DP . . . . . . .
4-2
4.2
The Differences Between the CPUs 312 IFM to 318 and
Their Previous Versions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4-6
5
Tips and Tricks
A
Standards, Certificates and Approvals
B
Dimensioned Drawings
C
List of Abbreviations
Glossary
Index
xii
PLC S7-300, CPU Specifications CPU 312 IFM to CPU 318-2 DP
A5E00111190-01
Contents
Figures
1-1
1-2
1-3
1-4
1-5
1-6
1-7
1-8
1-9
1-10
1-11
1-12
1-13
1-14
1-15
2-1
2-2
2-3
2-4
2-5
2-6
2-7
2-8
2-9
2-10
2-11
3-1
3-2
3-3
3-4
4-1
B-1
B-2
B-3
B-4
B-5
Control and Display Elements of the CPUs . . . . . . . . . . . . . . . . . . . . . . . . .
Status and Fault Displays of the CPUs . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Principle of Connection Resource Allocation for CPU 318-2 . . . . . . . . . . .
The Principle of Forcing with S7-300 CPUs (CPU 312IFM to 316-2DP) .
Display of the States of the Interrupt Inputs of the CPU 312 IFM . . . . . . .
Front View of the CPU 312 IFM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Wiring diagram of the CPU 312 IFM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Basic Circuit Diagram of the CPU 312 IFM . . . . . . . . . . . . . . . . . . . . . . . . . .
Display of the States of the Interrupt Inputs of the CPU 314 IFM . . . . . . .
Front View of the CPU 314 IFM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Wiring diagram of the CPU 314 IFM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Basic Circuit Diagram of the CPU 314 IFM (Special Inputs
and Analog Inputs/Outputs) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Basic Circuit Diagram of the CPU 314 IFM (Digital Inputs/Outputs) . . . . .
Connecting 2-wire measurement transducers to the analog inputs
of CPU 314 IFM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Wiring of 4-wire measurement transducers to the analog inputs
of CPU 314 IFM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Diagnostics with CPU 315-2DP < 315-2AF03 . . . . . . . . . . . . . . . . . . . . . . .
Diagnostics with CPU 31x-2 (315-2DP as of 315-2AF03) . . . . . . . . . . . . .
Diagnostic Addresses for DP Master and DP Slave . . . . . . . . . . . . . . . . . .
Transfer Memory in a CPU 31x-2 operating as DP Slave . . . . . . . . . . . . .
Diagnostic Addresses for DP Master and DP Slave . . . . . . . . . . . . . . . . . .
Format of the Slave Diagnostic Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Structure of the Module Diagnosis of the CPU 31x-2 . . . . . . . . . . . . . . . . .
Structure of the Station Diagnosis . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Byte x +4 to x +7 for Diagnostic and Hardware interrupt . . . . . . . . . . . . . .
Direct Communication using CPU 31x-2 . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Diagnostic address for receiver with direct communication . . . . . . . . . . . .
Component Parts of the Cycle Time . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Shortest Response Time . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Longest Response Time . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Overview of the Bus Runtime on PROFIBUS-DP at 1.5 Mbps
and 12Mbps . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Sample Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Dimensioned Drawing of the CPU 312 IFM . . . . . . . . . . . . . . . . . . . . . . . . .
Dimensioned Drawing of the CPU 313/314/315/315-2 DP/316-2DP . . . .
Dimensioned Drawing of the CPU 318-2 . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Dimensioned Drawing of the CPU 314 IFM, Front View . . . . . . . . . . . . . . .
Dimensioned Drawing of the CPU 314 IFM, Side View . . . . . . . . . . . . . . .
PLC S7-300, CPU Specifications CPU 312 IFM to CPU 318-2 DP
A5E00111190-01
1-2
1-3
1-15
1-21
1-26
1-27
1-34
1-36
1-45
1-46
1-56
1-57
1-58
1-59
1-59
2-8
2-9
2-10
2-14
2-22
2-24
2-28
2-29
2-30
2-32
2-33
3-2
3-4
3-5
3-9
4-4
B-1
B-2
B-3
B-4
B-5
xiii
Contents
Tables
1-1
1-2
1-3
1-4
1-5
1-6
1-7
1-8
1-9
1-10
1-11
1-12
2-1
2-2
2-3
2-4
2-5
2-6
2-7
2-8
2-9
2-10
2-11
2-12
2-13
2-14
2-15
2-16
3-1
3-2
3-3
3-4
3-5
3-6
3-7
3-8
3-9
xiv
The Differences in Control and Display Elements Between CPUs . . . . . .
Using a Backup Battery or Accumulator . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Memory Cards . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
CPU Interfaces . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Characteristics of the Clock of the CPUs . . . . . . . . . . . . . . . . . . . . . . . . . . .
CPU Communication Options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Connection Resources for CPUs 312 IFM to 316-2 DP . . . . . . . . . . . . . . .
Communication Resources for CPU 318-2 . . . . . . . . . . . . . . . . . . . . . . . . .
Diagnostic LEDs of the CPU . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Start Information for OB 40 for the Interrupt Inputs
of the Integrated I/Os . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Start Information for OB 40 for the Interrupt Inputs
of the Integrated I/Os . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Characteristic Features of the Integrated Inputs and Outputs
of the CPU 314 IFM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Meaning of the BUSF LED of the CPU 31x-2 as DP Master . . . . . . . . . . .
Reading Diagnostic Data with STEP 7 . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Event Detection of the CPU 31x-2 as DP Master . . . . . . . . . . . . . . . . . . . .
Evaluating RUN-STOP Transitions of the DP Slaves in the DP Master . .
Example of an address area configuration for transfer memory . . . . . . . .
Meaning of the BUSF LEDs in the CPU 31x-2 as DP Slave . . . . . . . . . . .
Fetching diagnostic data with STEP 5 and STEP 7
in the master system . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Event Detection of the CPU 31x-2 as DP Slave . . . . . . . . . . . . . . . . . . . . .
Evaluating RUN-STOP Transitions in the DP Master/DP Slave . . . . . . . .
Structure of Station Status 1 (Byte 0) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Structure of Station Status 2 (Byte 1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Structure of Station Status 3 (Byte 2) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Structure of the Master PROFIBUS Address (Byte 3) . . . . . . . . . . . . . . . .
Structure of the Manufacturer Identification (Bytes 4 and 5) . . . . . . . . . . .
Event Detection by CPU 31x-2 Acting as Receiver in
Direct Communication . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Evaluation of the Station Failure of the Sender During
Direct Communication . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Operating System Processing Times of the CPUs . . . . . . . . . . . . . . . . . . .
Process image update of the CPUs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
CPU-specific Factors for the User Program Processing Time . . . . . . . . . .
Updating the S7 Timers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Update Time and SFB Runtimes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Extending the Cycle by Nesting Interrupts . . . . . . . . . . . . . . . . . . . . . . . . .
Response time of the CPUs to process interrupts . . . . . . . . . . . . . . . . . . .
Diagnostic Interrupt Response Times of the CPUs . . . . . . . . . . . . . . . . . .
Reproducibility of the Delay and Watchdog Interrupts of the CPUs . . . . .
1-2
1-5
1-6
1-7
1-10
1-12
1-14
1-15
1-22
1-26
1-44
1-50
2-6
2-7
2-11
2-12
2-15
2-19
2-20
2-23
2-23
2-25
2-26
2-26
2-27
2-27
2-33
2-34
3-6
3-7
3-7
3-7
3-8
3-10
3-14
3-15
3-17
PLC S7-300, CPU Specifications CPU 312 IFM to CPU 318-2 DP
A5E00111190-01
1
CPUs
In This Section
Section
Contents
Page
1.1
Control and Display Elements
1-2
1.2
CPU Communication Options
1-11
1.3
Test Functions and Diagnostics
1-19
1.4
CPUs - Technical Specifications
1-24
Agreement for CPU 314IFM
The CPU 314IFM is available in 2 versions:
with slot for memory card (6ES7314-5EA10-0AB0)
without slot for memory card (6ES7314-5EA0x-0AB0/
6314ES7314-5EA8x-0AB0)
All details in this chapter apply to both versions of the CPU314IFM unless explicit
reference is made to differences between them.
PLC S7-300, CPU Specifications CPU 312 IFM to CPU 318-2 DP
A5E00111190-01
1-1
CPUs
1.1
Control and Display Elements
Figure 1-1 shows you the control and display elements of a CPU.
The order of the elements in some CPUs might differ from the order shown in the
figure below. The individual CPUs do not always have all the elements shown here.
Table 1-1 shows you the differences.
Status and
fault LEDs
Status and
fault displays for
DP interface
Slot for memory
card
Mode selector
Compartment for backup
battery or rechargeable
battery
Multipoint Interface
(MPI)
M
L
+
M
Connection for power supply
and system ground
Figure 1-1
PROFIBUS-DP
interface
Control and Display Elements of the CPUs
Differences Between CPUs
Table 1-1
The Differences in Control and Display Elements Between CPUs
Element
312 IFM
313
314
315
314 IFM
-5AE0x -5AE10
-
LEDs for DP
interface
Backup
battery/accumulator
Connection for
power supply
Memory card
PROFIBUS-DP
interface
1-2
315-2
DP
316-2
DP
No
No
Yes
No
accumulator
Yes
No; via
the front
connector
No
318-2
Yes
Yes
No
No
Yes
Yes
Yes
PLC S7-300, CPU Specifications CPU 312 IFM to CPU 318-2 DP
A5E00111190-01
CPUs
1.1.1
Status and Fault Displays
Displays for the CPU:
SF ... (red) ...hardware/software error
BATF ... (red) ...battery error (not CPU 312 IFM)
DC5V ... (green) ... 5V DC supply for CPU and S7-300 bus is ok.
FRCE ... (yellow) ...force job is active
RUN ... (green) ... CPU in RUN mode; LED flashes at start-up with 1 Hz; in HALT mode with 0.5 Hz
STOP ... (yellow) ... CPU in STOP/HALT or STARTUP mode;
LED flashes on request to reset memory
Displays for the PROFIBUS:
CPU 315-2 DP/
CPU 316-2 DP
BUSF ... (red) ... hardware or software fault at PROFIBUS interface
CPU 318-2
BUS1F ... (red) ... hardware or software fault at interface 1
BUS2F ... (red) ... hardware or software fault at interface 2
Figure 1-2
Status and Fault Displays of the CPUs
PLC S7-300, CPU Specifications CPU 312 IFM to CPU 318-2 DP
A5E00111190-01
1-3
CPUs
1.1.2
Mode Selector Switch
The mode selector is the same in all CPUs.
Mode Selector Positions
The positions of the mode selector are explained in the order in which they appear
on the CPU.
Details on CPU operating modes are found in the STEP 7 Online Help .
Position
Description
RUN-P
RUN-PROGRAM
mode
RUN mode
RUN mode
Description
The CPU scans the user program.
The key cannot be taken out in this position.
The CPU scans the user program.
The user program cannot be changed without password
confirmation.
Stop mode
Stop mode
The key can be removed in this position to prevent anyone not
authorized to do so from changing the operating mode.
The CPU does not scan user programs.
The key can be removed in this position to prevent anyone not
authorized to do so from changing the operating mode.
MRES mode
Memory reset
Momentary-contact position of the mode selector for CPU memory
reset (or a cold start as well in the case of the 318-2).
Memory reset per mode selector switch requires a specific
sequence of operation.
1-4
PLC S7-300, CPU Specifications CPU 312 IFM to CPU 318-2 DP
A5E00111190-01
CPUs
1.1.3
Backup battery/accumulator
Exceptions
The CPUs 312IFM and 313 do not have a real time clock so they do not need an
accumulator battery.
The CPU 312IFM does not have a buffer which means that you can not insert a
battery.
Backup battery or rechargeable battery?
Table 1-2 shows the differences in the backup provided by an accumulator and a
backup battery.
Table 1-2
Backup
with...
Using a Backup Battery or Accumulator
... Backs up
Rechargea Real-time clock only
ble battery
Backup
battery
User program (if not
stored on memory card
and protected against loss
on power failure)
More data areas in data
blocks are to be retained
than possible without
battery
The real-time clock
Remarks
Backup
Time
The rechargeable battery is charged
after CPU POWER ON.
120 h
(at 25C)
Note
You must create a backup of the
user program either on Memory
Card or, in the case of CPU314IFM
314 (-5AE0x-), on EPROM.
60 h
(at 60C)
Note
The >CPU can retain part of the
data without backup battery. You
only need a backup battery if you
want to retain more data than this.
PLC S7-300, CPU Specifications CPU 312 IFM to CPU 318-2 DP
A5E00111190-01
... after 1
hour of
recharging
1 year
1-5
CPUs
1.1.4
Memory card
Exceptions
You cannot insert a memory card with the CPUs 312 IFM and 314 IFM (-5AE0x).
These CPUs have an integrated read-only memory.
Purpose of the Memory Card
With the memory card, you can expand the load memory of your CPU.
You can store the user program and the parameters that set the responses of the
CPU and modules on the memory card.
You can also back up your CPU operating system to a Memory Card. except
CPU 318-2.
If you store the user program on the memory card, it will remain in the CPU when
the power is off even without a backup battery.
Available Memory Cards
The following memory cards are available:
Table 1-3
Memory Cards
Capacity
Type
Remarks
16 KB
The CPU supports the following functions:
32 KB
Loading of the user program on the
64 KB
module into the CPU
256 KB
128 KB
5 V FEPROM
512 KB
1 MB
With this function, the memory of the
CPU is reset, the user program is
downloaded onto the memory card, and
then uploaded from the memory card to
the CPU’s RAM.
Copying RAM data to ROM (not with
2 MB
CPU318-3182)
4 MB
128 KB
256 KB
512 KB
5 V RAM
Only with the CPU 318-2
1 MB
2 MB
1-6
PLC S7-300, CPU Specifications CPU 312 IFM to CPU 318-2 DP
A5E00111190-01
CPUs
1.1.5
MPI and PROFIBUS-DP Interface
Table 1-4
CPU Interfaces
CPU 315-2DP
CPU 316-2DP
CPU 312 IFM
CPU 313
CPU 314IFM
CPU 314
MPI interface
MPI interface
MPI
PROFIBUS-DP
interface
MPI
-
-
CPU 318-2
MPI/DP Interface
MPI/
DP
DP
-
PROFIBUS-DP
interface
Reconfiguration as
a PROFIBUS-DP
interface is
possible
DP
-
MPI interface
The MPI is the interface of the CPU for the programming device/OP and for
communication in an MPI subnet.
Typical (default) transmission speed is 187.5 Kbps (CPU 318-2: adjustable up to
12 Mbps).
Communication with an S7-200 requires 19.2 Kbps.
The CPU automatically broadcasts its set bus parameters (e.g. baud rate) at the
MPI interface. This means that a programming device, for example, can
automatically ”hook up” to an MPI subnet.
PROFIBUS-DP Interface
CPUs equipped with 2 interfaces provide a PROFIBUS-DP interface connection.
Transmission rates up to 12 Mbps are possible.
The CPU automatically broadcasts its set bus parameters (e.g. baud rate) at the
PROFIBUS-DP interface. This means that a programming device, for example,
can automatically ”hook up” to a PROFIBUS subnet.
In Step 7 you can switch off automatic transfer of bus parameter.
PLC S7-300, CPU Specifications CPU 312 IFM to CPU 318-2 DP
A5E00111190-01
1-7
CPUs
Connectable Devices
MPI
PROFIBUS-DP
Programming device/PC and OP
S7 programmable controller with MPI interface
(S7-300, M7-300, S7-400, M7-400, C7-6xx)
Programming device/PC and OP
S7 programmable controllers with the
PROFIBUS-DP interface (S7-200, S7-300,
M7-300, S7-400, M7-400, C7-6xx)
S7-200 (Note: 19.2 Kbps only)
Other DP masters and DP slaves
Only 19.2 Kbps for S7-200 in MPI Subnet
Note
At 19.2 Kbps for communicating with S7-200,
– a maximum of 8 nodes (CPU, PD/OP, FM/CP with own MPI address) is
permitted in a subnet, and
– no global data communication can be carried out.
Please consult the S7200 Manual for further information!
Removing and Inserting Modules in the MPI Subnet
You must not plug in or remove any modules (SM, FM, CP) of an S7-300
configuration while data is being transmitted over the MPI.
!
Warning
If you remove or plug in S7-300 modules (SM, FM, CP) during data transmission
via the MPI, the data might be corrupted by disturbing pulses.
You must not plug in or remove modules (SM, FM, CP) of an S7-300 configuration
during data transmission via the MPI!
1-8
PLC S7-300, CPU Specifications CPU 312 IFM to CPU 318-2 DP
A5E00111190-01
CPUs
Loss of GD packets Following Change in the MPI Subnet During Operation
!
Warning
Loss of data packets in the MPI subnet:
Connecting an additional CPU to the MPI subnet during operation can lead to loss
of GD packets and to an increase in cycle time.
Remedy:
1. Disconnect the node to be connected from the supply.
2. Connect the node to the MPI subnet.
3. Switch the node on.
PLC S7-300, CPU Specifications CPU 312 IFM to CPU 318-2 DP
A5E00111190-01
1-9
CPUs
1.1.6
Clock and Runtime Meter
Table 1-5 shows the characteristics and functions of the clock for the various
CPUs.
When you assign parameters to the CPU in STEP 7, you can also set functions
such as synchronization and the correction factor(see the STEP 7 online help
system).
Table 1-5
Characteristics of the Clock of the CPUs
Characteristics
Type
Manufacturer
setting
Backup
Operating hours
counter
312 IFM
313
314
Software clock
Not possible
-
Value range
with switched
315
315-2 DP
316-2DP
318-2
Hardware clock (integrated “real-time clock”)
DT#1994-01-01-00:00:00
Number
Accuracy
314 IFM
Backup battery
Accumulator
1
8
0
0 to 7
0 to 32767 hours
0 to 32767
hours
... max. deviation per day:
9s
on power
supply
0 to 60 C
with switched
off power
supply
0C
25C
40C
60C
1-10
+2s to -5s
2s
+2s to -3s
+2s to -7s
PLC S7-300, CPU Specifications CPU 312 IFM to CPU 318-2 DP
A5E00111190-01
CPUs
Behavior of Clock in POWER OFF Mode
The following table shows the clock behavior with the power of the CPU off,
depending on the backup:
Backup
With
backup
battery
CPU 314 to 318-2
The clock continues to operate in
power off mode.
With
The clock continues to operate in
accumulator power off mode for the backup time
of the accumulator. When the power
is on, the accumulator is recharged.
CPU 312 IFM and 313
At POWER ON, the clock continues
to operate using the clock time at
which POWER OFF took place.
Since the clock does not have a
power buffer, it does not continue to
run in POWER OFF mode.
In the event of backup failure, an
error message is not generated.
When the power comes on again,
the clock continues at the clock time
at which the power went off.
None
1.2
At POWER ON, the clock continues
to operate using the clock time at
which POWER OFF took place.
Since the CPU is not backed up, the
clock does not continue at POWER
OFF.
Communication Options of the CPU
The CPUs offer you the following communication options:
PLC S7-300, CPU Specifications CPU 312 IFM to CPU 318-2 DP
A5E00111190-01
1-11
CPUs
Table 1-6
CPU Communication Options
MPI
DP
PG/OP Communication
x
x
A CPU can maintain several on-line connections
simultaneously with one or more programming devices or
operator panels. For PD/OP communication via the DP
interface, you must activate the “Programming, modifying
and monitoring via the PROFIBUS” function when
configuring and assigning parameters to the CPU.
S7 Basic Communication
x
x
Using the I system functions, you can transfer data over the
MPI/DP network within an S7-300 (acknowledged data
exchange). Data exchange takes place via non-configured
S7 connections.
x
-
Using the XI system functions, you can transfer data to
other communication peers in the MPI subnet
(acknowledged data exchange). Data exchange takes
place via non-configured S7 connections.
Communications
Description
A listing of I/X SFCs is found in the Instruction List. Details
are found in the STEP 7 Online Help or in the System and
Standard Functions reference manual.
Routing of PG Functions
x
x
With CPUs 31x-2 and STEP 7 as of V 5/0, you can route
your PG/PC to S7 stations of other subnets, e.g. for
downloading user programs or hardware configurations, or
executing, testing and commissioning functions. Routing
with the DP interface requires you to activate the
“Programming, Status/Control...” function when configuring
and assigning parameters to the CPU.
Details on routing are found in the STEP 7-Online Help.
S7 Communication
x
-
S7 communication takes place via configured S7
connections. Here, the S7-300-CPUs are servers for
S7-400 CPUs. That is, S7-400 CPUs have read/write
access to S7-300 CPUs.
Global Data Communication
x
-
The CPUs of the S7-300/400 can exchange global data
with one another (unacknowledged data exchange).
1-12
PLC S7-300, CPU Specifications CPU 312 IFM to CPU 318-2 DP
A5E00111190-01
CPUs
Connection Resources
Every communication connection requires a communication resource on the
S7 CPU as a management unit for the duration of the communication. Every
S7 CPU has a certain number of connection resources available to it according to
its technical specifications which can be assigned to various communication
services (PD/OP communication, S7 communication or S7 basic communication).
The distribution of connection resources differs between CPUs 312 IFM to 316-2
DP (see the table 3-6) and the CPU 318-2 (see Table 1-8):
PLC S7-300, CPU Specifications CPU 312 IFM to CPU 318-2 DP
A5E00111190-01
1-13
CPUs
Connection Resources for CPUs 312IFM to 316-2 DP
Communication resources are independent of the interface in CPUs 315-2 DP and
316-2 DP. That is, a PG communication occupies a connection resource,
regardless of whether the connection was established via MPI or DP interface.
Table 1-7
Connection Resources for CPUs 312 IFM to 316-2 DP
Communication Function
PD communication/
OP communication
S7 basic communication
Description
In order to make the allocation of connection resources dependent not
only on the chronological sequence in which various communication
services are registered, connection resources can be reserved for the
following services:
PD communication and OP communication
S7 basic communication
For PD/OP communication, at least one connection resource is reserved
as the default setting. Lower values are not possible.
The technical specifications of the CPUs detail the possible connection
resources settings and the default settings in each case. In STEP 7 you
specify a ”redistribution” of communication resources when you configure
the CPU.
S7 communication
Other communication services such as S7 communication using
PUT/GET functions can not use these communication resources even if
they establish their connection at an earlier time. Instead, the remaining
available connection resources that have not been specifically reserved
for a particular service are used.
Example based on CPU 314 which has 12 connection resources
available:
- You reserve 2 connection resources for PD communication
- You reserve 6 connection resources for OP communication
- You reserve 1 connection resource for S7 basic communication
In this case, you still have three communication resources available
for S7 communication, PG/OP communication and S7 basic
communication.
Note on OP Communication Resources: When using more than three
OPs, error messages might occur due to temporary lack of resources in
the CPU. Examples of such error messages are “44 Transmission error
#13” or “#368 S7 communication error class 131 No. 4”.
Remedy: Acknowledge error messages manually or after a time delay
configured in PROTOOL (in “System Messages” →→ “Display time”).
Routing of PG functions
The CPUs provide connection resources for four routed connections.
(CPU 31x-2 DP)
Those connection resources are available in addition.
Communication via a CP
343-1 with data lengths >240
bytes for Send/Receive
The CP requires a free connection resource that is not reserved for
PD/OP/S7 basic communication.
1-14
PLC S7-300, CPU Specifications CPU 312 IFM to CPU 318-2 DP
A5E00111190-01
CPUs
Connection Resources for CPU 318-2
Table 1-8
Communication Resources for CPU 318-2
Description
Communication Function
PD/OP communication
S7 basic communication
The CPU 318-2 provides a total of 32 connection resources (with CPU
as connection terminal point) for these communication functions. Those
32 connection resources can be freely allocated to the various
communication functions.
When allocating connection resources, you should observe the following
points:
The number of connection resources differs for each interface as
follows:
Routing of PD functions
–
MPI/DP Interface 32 communication resources
–
DP-SS: 16 communication resources
In the case of connections that do not have the CPU as their terminal
S7 communication
point (e.g. an FM or in the case of routing) you must deduct 2
connection resources from the total resources and 1 connection
resource per interface.
Figure 1-3 shows the principle of allocation of connection resources.
An example of how connection resources are dimensioned is found in
Chapter LEERER MERKER.
Principle of Connection Resource Allocation for CPU 318-2
CPU 318-2
A total of 32 connection
resources for connections via
the MPI/DP and/or DP
interface
MPI/DP
32 connection resources for
connections via the MPI/DP
interface
Figure 1-3
DP
16 connection resources for
connections via the DP
interface
Principle of Connection Resource Allocation for CPU 318-2
PLC S7-300, CPU Specifications CPU 312 IFM to CPU 318-2 DP
A5E00111190-01
1-15
CPUs
Interface Resources for CPU 318-2 - Example Calculation
1. Two network transitions by routing on the CPU
Resources used:
- 2 connection resources of the MPI/DP interface are used;
- 2 connection resources of the DP interface are used;
- all 4 connection resources available to both interfaces
are used;
2. 4 connections for S7 basic communication and PG/OP communication with the
CPU as connection terminal point via MPI/DP interface
Resources used:
- 4 connection resources of the MPI/DP interface are used;
- all 4 connection resources available to both interfaces
are used;
Resources still availabe:
- 26 connection resources of the MPI/DP interface;
- 14 connection resources of the DP interface;
- 24 of the connection resources available to both interfaces
Data Consistency for Communication
An essential aspect of the transmission of data between devices is its consistency.
The data that is transmitted together should all originate from the same processing
cycle and should thus belong together, i.e. be consistent.
If there is a programmed communication function such as X-SEND/ X-RCV which
accesses shared data, then access to that data area can be co-ordinated by
means of the parameter “BUSY” itself.
However, with S7 communication functions not requiring a block in the user
program of the 31x CPU (as server), e.g. PUT/GET or read/write operations via
OP communication, the dimension of data consistency must be taken into account
during programming. The following differences between CPUs 312IFM to 316-2 DP
and CPU 318-2 must be taken into account:
1-16
PLC S7-300, CPU Specifications CPU 312 IFM to CPU 318-2 DP
A5E00111190-01
CPUs
CPU 312 IFM to 316-2 DP
CPU 318-2
PUT/GET functions of S7 communication, or
reading/writing variables via OP
communication, are processed during the
cycle checkpoint of the CPU.
PUT/GET functions of S7 communication, or
reading/writing to variable via OP
communication are processed in defined time
windows in the CPU 318-2 operating system.
For that reason, the user program can be
A defined process interrupt reaction time is
interrupted after every command
ensured by consistent copying of
communication variables in blocks of 32 bytes (Byte/Word/Double Word command) when a
communication variable is being accessed.
(CPU Versions lower than described in this
The data consistency of a communication
manual: Blocks of up to 8 Bytes) into/out of
variable is therefore only possible within the
user memory during the cycle checkpoint of
the operating system. Data consistency is not limits of the command boundaries used in the
user program.
guaranteed for any larger data areas.
If a data consistency size greater than Byte,
Therefore, communication variables in the
Word or DWord is required, communication
user program must not exceed a length of 8
variables in the user program must always be
or 32 byte if data consistency is required.
copied using SFC81 “UBLKMOV” that
If you copy communication variables using
guarantees consistent reading/writing of the
SFC 81 “UBLKMOV”, the copying process is
complete communication variable area.
not interrupted by higher priority classes.
PLC S7-300, CPU Specifications CPU 312 IFM to CPU 318-2 DP
A5E00111190-01
1-17
CPUs
Details
... on the communication topic are found in the STEP 7 Online Help and in the
manual Communication with SIMATIC.
... on communications SFCs/SFBs are found in the STEP 7 Online Help and in the
Standard and System functions reference manual.
Global Data Communication with S7-300 CPUs
Below you will find important features of global data communication in the S7-300.
Send/Receive Conditions
For the communication via GD circuits, you should observe the following
conditions:
Required for the GD packet transmitter is:
Reduction ratio Transmitter Cycle time Transmitter 60 ms (CPU 318-2: 10 ms
Required for the GD packet receiver is:
Reduction ratio Receiver Cycle timer eceiver Reduction ratio Transmitter Cycle
time Transmitter
Non-observance of these conditions can lead to the loss of a GD packet. The
reasons for this are:
The performance capability of the smallest CPU in the GD circuit
Sending and receiving of global data is carried out asynchronously by the
sender and receiver.
Loss of global data is displayed in the status field of a GD circuit if you have
configured this with STEP 7.
Note
Note when communicating via global data: sent global data is not acknowledged
by the receiving partner!
The sender therefore receives no information on whether a receiver and which
receiver has received the sent global data.
Send Cycles for Global Data
In STEP 7 (as of Version 3.0), the following situation can arise if you set “Send
after every CPU cycle” with a short CPU cycle time (< 60 ms): the operating
system overwrites GD packets the CPU has not yet transmitted. Tip: Loss of
global data is displayed in the status field of a GD circuit if you have configured this
with STEP 7.
1-18
PLC S7-300, CPU Specifications CPU 312 IFM to CPU 318-2 DP
A5E00111190-01
CPUs
1.3
Test Functions and Diagnostics
The CPUs provide you with:
1.3.1
Testing functions for commissioning
Diagnostics via LEDs and STEP 7.
Testing Functions
The CPUs offer you the following testing functions:
Monitor Variables
Modify Variables
Forcing (note the differences between CPUs)
Monitor block
Set Breakpoint
Details on the testing functions are found in the STEP 7 Online Help.
Important for the Status FB!
The STEP 7 function “Status FB” increases CPU cycle time!
In STEP 7 you can specify a maximum permissible increase in cycle time (not
CPU 318-2). In this case, in STEP 7 you must specify process mode for the CPU
parameters.
PLC S7-300, CPU Specifications CPU 312 IFM to CPU 318-2 DP
A5E00111190-01
1-19
CPUs
Different Features of Forcing S7-300
Please note the different features of forcing in the different CPUs:
CPU 312IFM to 316-2DP
CPU 318-2
1-20
The variables of a user program with
fixed preset values (force values)
cannot be changed or overwritten by
the user program.
It is not permissible to force peripheral
or process image areas lying in the
range of consistent user data.
The variables of a user program with
fixed preset values (force values) can
be changed or overwritten in the user
program.
(See Figure 1-4 on page 1-21)
The following can be variables:
Inputs/outputs
Peripheral I/Os
Memory markers
You can force up to 256 variables.
The following can be variables:
Inputs/Outputs
You can force up to 10 variables.
PLC S7-300, CPU Specifications CPU 312 IFM to CPU 318-2 DP
A5E00111190-01
CPUs
Forcing with the CPU 312 IFM to 316-2 DP:
!
Caution
Forced values in the input process image can be overwritten by write instructions
(e.g. T EB x, = E x.y, copying with SFC etc.) and peripheral read instructions (e.g.
L PEW x) in the user program, as well as by write instructions of PG/OP operations!
Outputs initialized with forced values only return the forced value if the user program does not execute any write accesses to the outputs using peripheral write
commands (e.g. TPQB x ) and if no PG/OP functions write to these outputs!
Always note that forced values in the I/O process image cannot be overwritten by
the user program or PG/OP functions!
With S7-300 CPUs, forcing is the same as “cyclical modify”
Execute force
job for inputs
Execute force
job for inputs
PIO
transfer
Execute force
job for outputs
OS
PII
transfer
Forced
value
User program
Forced value
overwritten by T
PQW!
T PQW
PIO
transfer
OS
PII
transfer
Forced
value
Execute force
job for outputs
OS .... Operating system execution
Figure 1-4 The Principle of Forcing with S7-300 CPUs (CPU 312IFM to 316-2DP)
PLC S7-300, CPU Specifications CPU 312 IFM to CPU 318-2 DP
A5E00111190-01
1-21
CPUs
1.3.2
Diagnostics with LED Display
In Table 1-9, only the LEDs relevant to the diagnosis of the CPU and S7-300 are
listed. You will find the significance of the PROFIBUS-DP interface LEDs explained
in Chapter 2.
Table 1-9
Diagnostic LEDs of the CPU
Description
LED
SF
Comes on in
the event of
Hardware faults
Programming errors
Parameter assignment errors
Calculation errors
Timing errors
Faulty memory card
Battery fault or no backup at power on
I/O fault/error (external I/O only)
Communication error
BATF
Comes on
when
The backup battery is missing, faulty or not charged.
Note Also lit if a rechargeable battery is installed. Reason:
The user program is not backed up the rechargeable battery.
Stop
Comes on
when
The CPU is not processing a user program
The CPU requests a memory reset
Flashes when
1.3.3
Diagnostics with STEP 7
Note
Please note that this is not a fail-safe or redundant system, regardless of its existing extensive monitoring and error reaction functions.
If an error occurs, the CPU enters the cause of the error in the diagnostic buffer.
You can read the diagnostic buffer using the programming device.
The CPU switches to STOP if an error or interrupt event occurs, or your user
program reacts accordingly with error or interrupt OBs. Details on STEP 7
diagnostic functions are found in the STEP 7 Online Help.
In the Instruction list you can find an overview
1-22
of the OBs you can use to react to respective error or interrupt events, as well
as of the OBs you can program in the respective CPU
PLC S7-300, CPU Specifications CPU 312 IFM to CPU 318-2 DP
A5E00111190-01
CPUs
CPU Reaction on Missing Error OB
If you have not programmed an error OB, the CPU reacts as follows:
CPU goes into STOP on missing ...
OB 80
(Runtime error)
OB 85
(Program cycle error)
OB 86
(Station failure in the PROFIBUSDP subnet)
OB 87
(Communication error)
OB 121
(Programming error)
OB 122
(Peripheral direct access
error)
CPU Remains in RUN with Missing ...
OB 81
(Power break)
CPU Behavior When There Is No Interrupt OB
If you have not programmed an interrupt OB, the CPU reacts as follows:
CPU goes into STOP on missing ...
OB 10/11
(TOD interrupt)
CPU Remains in RUN with Missing ...
OB 32/35 (Watchdog interrupt)
OB 20/21 (Delay interrupt)
OB 40/41 (Process interrupt)
OB 55
(TOD interrupt)
OB 56
(Delay interrupt)
OB 57
(for manufacturer-specific
interrupts)
OB 82
(Diagnostic interrupt)
OB 83
(Insertion/Removal interrupt)
Tip on OB35 (CPU 318-2: also OB32)
For the watchdog interrupt OB 35/32, you can specify times starting from 1 ms.
Note: The smaller the selected watchdog interrupt period, the more likely
watchdog interrupt errors will occur. You must take into account the operating
system times of the CPU in question, the runtime of the user program and the
extension of the cycle by active programming device functions, for example.
PLC S7-300, CPU Specifications CPU 312 IFM to CPU 318-2 DP
A5E00111190-01
1-23
CPUs
1.4
CPUs - Technical Specifications
In This Section
You will find the technical specifications of the CPU.
You will find the technical specifications of the integrated inputs/outputs of the
CPU 312 IFM and 314 IFM.
You will not find the features of the CPU 31x-2 DP as a DP master/DP slave.
Refer to Chapter 2.
Section
1-24
Contents
Page
1.4.1
CPU 312 IFM
1-25
1.4.2
CPU 313
1-37
1.4.3
CPU 314
1-40
1.4.4
CPU 314 IFM
1-43
1.4.5
CPU 315
1-60
1.4.6
CPU 315-2 DP
1-63
1.4.7
CPU 316-2 DP
1-66
1.4.8
CPU 318-2
1-69
PLC S7-300, CPU Specifications CPU 312 IFM to CPU 318-2 DP
A5E00111190-01
CPUs
1.4.1
CPU 312 IFM
Special Features
Integrated I/Os (Wiring via 20-pole front connector)
No backup battery and therefore maintenance-free
An S7-300 with CPU 312 IFM can be mounted only on one rack
Integrated Functions of the CPU 312 IFM
Integrated Functions
Process interrupt
Description
Interrupt input means: inputs configured with this function trigger a process
interrupt at the corresponding signal edge.
Interrupt input options for the digital inputs 124.6 to 125.1 must be programmed
in STEP 7.
Counter
The CPU 312 IFM offers these special functions as an alternative at the digital
inputs 124.6 to 125.1.
Frequency meter
For a description of the special functions “Counter” and “Frequency meter”,
please refer to the Integrated Functions Manual.
“Interrupt Inputs” of the CPU 312 IFM
If you wish to use the digital inputs 124.6 to 125.1 as interrupt inputs, you must
program these in STEP 7 in the CPU parameters.
Note the following points:
These digital inputs have a very low signal delay. At this interrupt input, the
module recognizes pulses with a length as of approx. 10 to 50 s. Always use
shielded cable to connect active interrupt inputs in order to avoid interrupts
triggered by line interference.
Note The minimum pulse width of an interrupt trigger pulse is 50 s.
The input status associated with an interrupt in the input process image or with
LPIB always changes with ”normal” input delay of approx.3 ms.
PLC S7-300, CPU Specifications CPU 312 IFM to CPU 318-2 DP
A5E00111190-01
1-25
CPUs
Start information for OB40
Table 1-10 shows the temporary (TEMP) variables of OB40 relevant for the
“Interrupt inputs” of the CPU 312 IFM. Refer to theSystem and Standard functions
reference manual for details on the process interrupt OB.
Table 1-10 Start Information for OB 40 for the Interrupt Inputs of the Integrated I/Os
Byte
Variable
Data Type
Description
6/7
OB40_MDL_ADDR
WORD
B#16#7C
Address of the interrupt triggering
module (in this case, the CPU)
8 on
OB40_POINT_ADDR
DWORD
See Figure 1-5
Signaling of the interrupt triggering
integrated inputs
Display of the Interrupt Inputs
In variable OB40_POINT_ADDR, you can view the interrupt inputs which have
triggered a process interrupt. Figure 1-5 shows the allocation of the interrupt inputs
to the bits of the double word.
Note: Several bits can be set if interrupts are triggered by several inputs within
short intervals (< 100 s). That is, the OB is started once only, even if several
interrupts are pending.
5 4 3 2 1 0
31 30
Bit No.
Reserved
PRIN from
PRIN from
PRIN from
PRIN from
I124.6
I 124.7
I125.0
I 125.1
PRIN: Process interrupt
Figure 1-5
1-26
Display of the States of the Interrupt Inputs of the CPU 312 IFM
PLC S7-300, CPU Specifications CPU 312 IFM to CPU 318-2 DP
A5E00111190-01
CPUs
Front View
Status and
fault LEDs
Mode selector
Multipoint Interface
(MPI)
I124.0
I
1
I
2
I
3
I
4
I
5
I
6
I
7
I125.0
I
1
Q124.0
Q
1
Q
2
Q
3
Q
4
Q
5
Front connector,
used to connect
the integrated
I/O, power
supply and
system ground.
Figure 1-6 Front View of the CPU 312 IFM
PLC S7-300, CPU Specifications CPU 312 IFM to CPU 318-2 DP
A5E00111190-01
1-27
CPUs
Technical Specifications of the CPU 312 IFM
CPU and Product Version
MLFB
Data areas and their retentive characteristics
6ES7 312-5AC02-0AB0
Hardware version
01
Firmware version
V 1.1.0
Matching programming
package
STEP 7 V 5.0;
Service Pack 03
Retentive data area as a
whole (inc. flags, timers,
counters)
max. 1 DB, 72 data bytes
Bit memories
1024
Memory
Work memory
Clock memories
8 (1 memory byte)
Data blocks
max. 63 (DB 0 reserved)
integral
Expandable
6 KB
no
Load memory
integral
Size
max. 6 KB
Adjustable retentivity
max. 1 DB, 72 bytes
Preset
No retentivity
Local data (non-alterable)
max. 512 bytes
256 bytes
no
Blocks
Per priority class
Yes
OBs
See Instruction List
With battery
no
max. 6 KB
Without battery
72 bytes retentive
Configurable
(data, flags, timers)
Nesting depth
Bit instructions
0.6 s minimum
Word instructions
2 s minimum
Double integer math
3 s minimum
Floating-point math
instructions
60 s minimum
Timers/Counters and their retentive characteristics
S7 counters
32
Adjustable retentivity
from C 0 to C 31
Preset
from C 0 to C 7
Counting range
1 to 999
IEC Counters
Yes
SFBs
Type
S7 timers
MB 0 to MB 15
Expandable RAM
Processing times for
Preset
no
Processing times
MB 0 to MB 71
Expandable FEPROM
Backup
20 KB RAM
20 KB EEPROM
Adjustable retentivity
No
Timing range
10 ms to 9990 s
IEC Timers
Yes
SFBs
1-28
Per priority class
8
additional levels within
an error OB
None
FBs
max. 32;
max. 6 KB
Size
FCs
max. 32;
max. 6 KB
Size
Address areas (I/O)
Peripheral address area
Digital
0 to 31/0 to 31
–
124,125 E/124 A
integrated
Analog
256 to 383/256 to 383
Process image (cannot be
customized)
32 bytes+4 bytes
integrated/ 32 bytes+4
bytes integrated
Digital channels
256+10 integrated/256+6
integrated
Analog channels
64/32
64
Adjustable retentivity
Type
Size
PLC S7-300, CPU Specifications CPU 312 IFM to CPU 318-2 DP
A5E00111190-01
CPUs
Configuration
Communication functions
Rack
1
PD/OP communication
Yes
Modules per module rack
max. 8
Global data communication
Yes
DP Master
Number of GD packets
integral
None
–
Sender
1
via CP
Yes
–
Receiver
1
S7 message functions
Simultaneously active
None
Size of GD packets
max. 22 bytes
–
8 bytes
Alarm-S blocks
Time
Real-time clock
Yes
Backed-up
No
Accuracy
See Section 1.1.6
Number of which
consistent
S7 basic communication
Yes
User data per job
max. 76 bytes
–
32 bytes for X/I_PUT/_GET;
Number of which
consistent
76 bytes for
X_SEND/_RCV
Operating hours counter
No
S7 communication
Yes (server)
Clock synchronisation
Yes
User data per job
max. 160 bytes
–
32 bytes
On PLC
Master
On MPI
Master/Slave
Testing and commissioning functions
Status/Modify Variables
Variable
Number
Inputs, outputs, flags, DBs,
timers, counters
–
Monitor Variables
max. 30
–
Modify Variables
max. 14
Force
Yes
Inputs, outputs
Number
max. 10
Monitor block
Yes
Single sequence
Yes
Breakpoint
2
Diagnostic buffer
Yes
100
Number of entries
(non-alterable)
S7-compatible
communication
No
Standard communication
No
Number of connection
resources
6 for PD/OP/S7 basic/S7
communication
Reservation for
–
PD communication
User-definable
Default
max. 5
from 1 to 5
1
–
OP communication
User-definable
Default
max. 5
from 1 to 5
1
–
S7 basic
communication
User-definable
Default
max. 2
Yes
Variable
Number of which
consistent
from 0 to 2
2
Interfaces
1. Interface
Functionality
PLC S7-300, CPU Specifications CPU 312 IFM to CPU 318-2 DP
A5E00111190-01
MPI
Yes
DP Master
No
DP Slave
No
Galvanically isolated
No
1-29
CPUs
MPI
Voltages, Currents
Services
–
PD/OP
communication
Yes
–
Global data
communication
Yes
–
S7 basic
communication
Yes
–
S7 communication
Yes (server)
Transmission rates
19.2; 187.5 Kbps
Dimensions
Assembly dimension
BHT (mm)
80125130
Weight
Approx. 0.45 kg
Power supply
24V DC
20.4 to 28.8 V
Permissible range
Current consumption (idle)
typical 0.7 A
Inrush current
typical 8A
l2t
0.4 A2s
External fusing for supply
lines (recommendation)
Circuit breaker; 10 A,
PG supply on MPI (15 to
30V DC)
max. 200 mA
Power losses
typical 9 W
Battery
No
Accumulator
No
Type B or C
Integrated inputs/outputs
Programming
Programming language
STEP 7
Stored instructions
See Instruction List
Addresses of integral
Nesting levels
8
System functions (SFCs)
See Instruction List
Integrated Functions
System function blocks
(SFBs)
See Instruction List
Counter
1 (see Integrated
Functions)
User program security
Password protection
Frequency meter
up to 10 kHz max.
Digital inputs
E 124.0 to E 127.7
Digital outputs
A 124.0 to A 124.7
manual
(see Integrated Functions)
manual
1-30
PLC S7-300, CPU Specifications CPU 312 IFM to CPU 318-2 DP
A5E00111190-01
CPUs
Technical Specifications of the Special Inputs of the CPU 312IFM
Module-Specific Data
Number of inputs
Sensor Selection Data
4
I 124.6 to 125.1
Cable length
Shielded
Input voltage
Rated value
For “1” signal
I 125.0 and I 125.1
I 124.6 and I 124.7
max. 100 m (109yd.)
Voltages, Currents, Potentials
For “0” signal
Number of inputs that can
be triggered simultaneously
Input current
4
15 to 30 V
15 to 30 V
-3 to 5 V
For “1” signal
(horizontal
configuration)
24V DC
I 125.0 and I 125.1
I 124.6 and I 124.7
4
min. 2 mA
min. 6.5 mA
up to 60°C
(vertical configuration)
4
up to 40°C
Status, Interrupts; Diagnostics
Status display
1 green LED per
channel
Input delay time
For “0” to “1”
For “1” to “0”
max. 50 s
max. 50 s
Input characteristic
E 125.0 and E 125.1
to IEC 1131, Type 1
to IEC 1131, Type 1
E 124.6 and 124.7
Interrupts
Process interrupt
Configurable
Diagnostic functions
None
Connection of 2-wire
BEROs
no
Permissible idle current
I 125.0 and I 125.1
I 124.6 and I 124.7
max. 0.5 mA
max. 2 mA
Time, Frequency
Internal conditioning time
for
Interrupt processing
max. 1.5 ms
Input frequency
10 kHz
PLC S7-300, CPU Specifications CPU 312 IFM to CPU 318-2 DP
A5E00111190-01
1-31
CPUs
Technical Specifications of the Digital Inputs of the CPU 312IFM
Note
Alternatively, you can configure the inputs I 124.6 and I 124.7 as special inputs, in
which case the technical specifications listed for the special inputs apply to the
inputs I 124.6 and I 124.7.
Module-Specific Data
Number of inputs
Status, Interrupts; Diagnostics
8
Status display
1 green LED per
channel
max. 600 m
Interrupts
None
max. 1000 m
Diagnostic functions
None
Cable length
Unshielded
Shielded
Voltages, Currents, Potentials
Sensor Selection Data
Number of inputs that can
be triggered simultaneously
Input voltage
8
(horizontal
configuration)
8
up to 60°C
(vertical configuration)
8
up to 40°C
Galvanic isolation
No
Rated value
For “1” signal
For “0” signal
24V DC
11 to 30 V
-3 to 5 V
Input current
For “1” signal
typical 7 mA
Input delay time
For “0” to “1”
For “1” to “0”
1.2 to 4.8 ms
Input characteristic
to IEC 1131, Type 2
Connection of 2-wire
BEROs
Possible
Permissible quiescent
max. 2 mA
1.2 to 4.8 ms
current
1-32
PLC S7-300, CPU Specifications CPU 312 IFM to CPU 318-2 DP
A5E00111190-01
CPUs
Technical Specifications of the Digital Outputs of the CPU 312IFM
Module-Specific Data
Number of outputs
Actuator Selection Data
6
For “1” signal
Cable length
Unshielded
Shielded
Output voltage
max. 600 m
Output current
max. 1000 m
For “1” signal
Voltages, Currents, Potentials
Total current of outputs (per
group)
min. L+ (-0.8 V)
Rated value
0.5 A
Permissible range
5 mA to 0.6 A
For “0” signal
(horizontal
Residual current
max. 0.5 mA
configuration)
max. 3 A
Load impedance range
48 to 4 k
up to 40°C
max. 3 A
Lamp load
max. 5 W
max. 3 A
Parallel connection of 2
outputs
up to 60°C
(vertical configuration)
up to 40°C
Galvanic isolation
For dual-channel
No
Status, Interrupts; Diagnostics
Status display
1 green LED per
channel
Interrupts
None
Diagnostic functions
None
Possible
triggering of a load
For performance
Not possible
increase
Triggering of a digital input
Possible
Switching frequency
For resistive load
For inductive load to
max. 100 Hz
max. 0.5 Hz
IEC947-5-1, DC 13
For lamp load
max. 100 Hz
Inductive breaking voltage
limited internally to
typical V 30
Short-circuit protection of
the output
yes, electronically
timed
Response threshold
typical 1 A
PLC S7-300, CPU Specifications CPU 312 IFM to CPU 318-2 DP
A5E00111190-01
1-33
CPUs
Wiring diagram of the CPU 312 IFM
Figure 1-7 shows the wiring diagram of the CPU 312 IFM. Use a 20-pole front
connector to wire the CPU’s integrated I/O.
!
Caution
The CPU 312 IFM has no reverse polarity protection. Polarity reversal destroys
the integrated outputs. Nonetheless, in this case the CPU does not switch to
STOP and the status displays are lit. In other words, the fault is not indicated.
I124.0
I 1
I 2
I 3
I 4
I 5
I 6
I 7
I125.0
I
1
Q124.0
Q
1
Q
2
Q
3
Q
4
Q
5
Figure 1-7
Wiring diagram of the CPU 312 IFM
Grounded Configuration Only
You can use the CPU 312 IFM in a grounded configuration only. In the CPU 312
IGFM, system ground is connected internally to chassis ground (M) (see
Figure 1-8, page 1-36).
1-34
PLC S7-300, CPU Specifications CPU 312 IFM to CPU 318-2 DP
A5E00111190-01
CPUs
Power Supply Connections
The
CPU 312 IFM and
the integrated I/Os
are connected to power at the terminals 18 and 19 (see Figure 1-7).
Short-circuit reaction
On short-circuit at one of the integrated outputs of CPU 312 IFM, proceed as
follows:
1. Switch the CPU 312 IFM to STOP or switch off the power supply.
2. Eliminate the cause of the short-circuit.
3. Switch the CPU 312 IFM back to RUN or switch the power supply back on.
PLC S7-300, CPU Specifications CPU 312 IFM to CPU 318-2 DP
A5E00111190-01
1-35
CPUs
Basic Circuit Diagram of the CPU 312 IFM
Figure 1-8 shows the block diagram of CPU 312 IFM.
CPU
CPU power
supply
L+
M
M
Figure 1-8
1-36
Basic Circuit Diagram of the CPU 312 IFM
PLC S7-300, CPU Specifications CPU 312 IFM to CPU 318-2 DP
A5E00111190-01
CPUs
1.4.2
CPU 313
Technical Specifications of the CPU 313
CPU and Product Version
MLFB
Data areas and their retentive characteristics
6ES7 313-1AD03-0AB0
Hardware version
01
Firmware version
V 1.1.0
Matching programming
package
STEP 7 V 5.0;
Service Pack 03
Retentive data area as a
whole (inc. flags, timers,
counters)
max. 1 DB, 72 data bytes
Bit memories
2048
Memory
Work memory
Clock memories
8 (1 memory byte)
Data blocks
max. 127 (DB 0 reserved)
integral
12 KB
Expandable
no
20 KB RAM
Expandable FEPROM
Up to 4 MB
Local data (non-alterable)
max. 1536 bytes
no
256 bytes
Yes
Blocks
All data
OBs
See Instruction List
max. 8 KB
Expandable RAM
With battery
Without battery
72 bytes retentive
Configurable
(data, flags, timers)
Processing times
Processing times for
Size
max. 8 KB
Adjustable retentivity
1 DB, 72 bytes
Preset
No retentivity
Per priority class
Size
Nesting depth
Per priority class
8
additional levels within
an error OB
4
Bit instructions
0.6 s minimum
FBs
128
Word instructions
2 s minimum
max. 8 KB
Double integer math
2 s minimum
FCs
128
Floating-point math
instructions
60 s minimum
max. 8 KB
S7 counters
Size
Size
Address areas (I/O)
Timers/Counters and their retentive characteristics
MB 0 to MB 15
integral
Backup
MB 0 to MB 71
Preset
Load memory
Adjustable retentivity
64
Peripheral address area
Digital
0 to 31/0 to 31
Analog
256 to 383/256 to 383
Adjustable retentivity
from C 0 to C 63
Preset
from C 0 to C 7
1 to 999
Process image (cannot be
customized)
32 bytes/32 bytes
Counting range
IEC Counters
Yes
Digital channels
max. 256/256
Type
SFB
Analog channels
max. 64/32
S7 timers
128
Adjustable retentivity
from T 0 to T 31
Preset
No retentive times
Timing range
10 ms to 9990 s
IEC Timers
Yes
SFB
Type
PLC S7-300, CPU Specifications CPU 312 IFM to CPU 318-2 DP
A5E00111190-01
1-37
CPUs
Configuration
Communication functions
Rack
1
PD/OP communication
Yes
Modules per module rack
max. 8
Global data communication
Yes
Number of DP masters
Number of GD packets
integral
No
–
Sender
1
via CP
1
–
Receiver
1
S7 message functions
Simultaneously active
None
Size of GD packets
max. 22 bytes
–
8 bytes
Alarm-S blocks
Time
Real-time clock
Backed-up
No
Accuracy
See Section 1.1.6
Operating hours counter
User data per job
max. 76 bytes
–
32 bytes for X/I_PUT/_GET;
Number of which
consistent
76 bytes for
X_SEND/_RCV
S7 communication
Yes (server)
0
User data per job
max. 160 bytes
Value range
0 to 32767 hours
–
32 bytes
Selectivity
1 hour
Retentive
Yes
Yes
On PLC
Master
On MPI
Master/Slave
Status/Modify Variables
Variable
Number
max. 30
–
Modify Variables
max. 14
Inputs, outputs
Number
max. 10
Monitor block
Yes
Single sequence
Yes
Breakpoint
2
Diagnostic buffer
Yes
1-38
Standard communication
No
Number of connection
resources
8 for PD/OP/S7 basic/S7
communication
Yes
Variable
Number of entries
(non-alterable)
No
Reservation for
–
PD communication
User-definable
Default
max. 7
from 1 to 7
1
–
OP communication
User-definable
Default
max. 7
from 1 to 7
1
–
S7 basic
communication
User-definable
Default
max. 4
Inputs, outputs, flags, DBs,
timers, counters
Monitor Variables
100
Number of which
consistent
S7-compatible
communication
Yes
–
Force
Yes
1
Testing and commissioning functions
S7 basic communication
Number
Clock synchronisation
Yes
Number of which
consistent
from 0 to 4
4
Interfaces
1. Interface
Functionality
MPI
Yes
DP Master
No
DP Slave
No
Galvanically isolated
No
PLC S7-300, CPU Specifications CPU 312 IFM to CPU 318-2 DP
A5E00111190-01
CPUs
MPI
Voltages, Currents
Services
–
PD/OP
communication
Yes
–
Global data
communication
Yes
–
S7 basic
communication
Yes
–
S7 communication
Yes (server)
Transmission rates
19.2; 187.5 Kbps
Dimensions
Power supply
24V DC
Permissible range
20.4 to 28.8
Current consumption (idle)
typical 0.7 A
Inrush current
typical 8A
l2t
0.4 A2s
External fusing for supply
lines (recommendation)
Circuit breaker; 2 A
PD supply at MPI (15 to
30V DC)
max. 200 mA
Power losses
typical 8 W
Assembly dimension
BHT (mm)
80125130
Weight
Approx. 0.53 kg
Programming language
STEP 7
Stored instructions
See Instruction List
Nesting levels
8
System functions (SFCs)
See Instruction List
System function blocks
(SFBs)
See Instruction List
User program security
Password protection
Type B or C
Battery
Programming
Backup margin at 25
C and continuous CPU
buffering
min. 1 year
Battery shelf life at
25C
approx. 5 years
Accumulator
PLC S7-300, CPU Specifications CPU 312 IFM to CPU 318-2 DP
A5E00111190-01
No
1-39
CPUs
1.4.3
CPU 314
Technical Specifications of the CPU 314
CPU and Product Version
MLFB
Data areas and their retentive characteristics
6ES7 314-1AE04-0AB0
Hardware version
01
Firmware version
V 1.1.0
Matching programming
package
STEP 7 V 5.0;
Service Pack 03
Retentive data area as a
whole (inc. flags, timers,
counters)
4736 bytes
Bit memories
2048
Memory
Work memory
Clock memories
8 (1 memory byte)
Data blocks
max. 127 (DB 0 reserved)
integral
24 KB
Expandable
no
Load memory
integral
40 KB RAM
Expandable FEPROM
Up to 4 MB
Expandable RAM
no
Backup
Yes
With battery
All data
Without battery
4736 bytes, configurable,
(data, flags, timers)
MB 0 to MB 255
Preset
MB 0 to MB 15
Size
max. 8 KB
Adjustable retentivity
max. 8 DB, 4096 data bytes
in all
Preset
No retentivity
Local data (non-alterable)
max. 1536 bytes
256 bytes
Per priority class
Blocks
OBs
See Instruction List
max. 8 KB
Size
Nesting depth
Processing times
Processing times for
Adjustable retentivity
Bit instructions
0.3 s minimum
Word instructions
1 s minimum
Double integer math
2 s minimum
Floating-point math
instructions
50 s minimum
Per priority class
8
additional levels within
an error OB
4
FBs
max. 128
max. 8 KB
Size
FCs
max. 128
Timers/Counters and their retentive characteristics
max. 8 KB
S7 counters
64
Address areas (I/O)
Adjustable retentivity
from C 0 to C 63
Peripheral address area
Preset
from C 0 to C 7
Counting range
0 to 999
IEC Counters
Yes
Type
SFB
S7 timers
128
Adjustable retentivity
from T 0 to T 127
Preset
No retentive times
Timing range
10 ms to 9990 s
IEC Timers
Yes
SFB
Type
1-40
Size
Digital
0 to 127/0 to 127
Analog
256 to 767/256 to 767
Process image (cannot be
customized)
128 bytes/128 bytes
Digital channels
max. 1024/1024
Analog channels
max. 256/128
PLC S7-300, CPU Specifications CPU 312 IFM to CPU 318-2 DP
A5E00111190-01
CPUs
Configuration
Communication functions
Rack
max. 4
PD/OP communication
Yes
Modules per module rack
max. 8
Global data communication
Yes
Number of DP masters
Number of GD packets
integral
None
–
Sender
1
via CP
1
–
Receiver
1
S7 message functions
Simultaneously active
max. 40
Size of GD packets
max. 22 bytes
–
8 bytes
Alarm-S blocks
Time
Real-time clock
Backed-up
Yes
Accuracy
See Section 1.1.6
Operating hours counter
User data per job
max. 76 bytes
–
32 bytes for X/I_PUT/_GET;
Number of which
consistent
76 bytes for
X_SEND/_RCV
S7 communication
Yes (server)
User data per job
max. 160 bytes
Value range
0 to 32767 hours
–
32 bytes
Selectivity
1 hour
Retentive
Yes
Yes
On PLC
Master
On MPI
Master/Slave
Variable
Number of which
consistent
S7-compatible
communication
Yes (via CP and loadable
FC)
User data per job
Dependent on CP
–
Dependent on CP
Number of which
consistent
Standard communication
Yes
Inputs, outputs, flags, DBs,
timers, counters
Dependent on CP
–
Dependent on CP
Number of which
consistent
–
Monitor Variables
max. 30
–
Modify Variables
max. 14
Number of connection
resources
Yes
Variable
Inputs, outputs
Number
max. 10
Monitor block
Yes
Single sequence
Yes
Breakpoint
2
Diagnostic buffer
Yes
100
Number of entries
(non-alterable)
Yes (via CP and loadable
FC)
User data per job
Number
Force
0
Status/Modify Variables
Yes
1
Testing and commissioning functions
S7 basic communication
Number
Clock synchronisation
Yes
Number of which
consistent
12 for PD/OP/S7 basic/S7
communication
Reservation for
–
PD communication
User-definable
Default
max. 11
from 1 to 11
1
–
OP communication
User-definable
Default
max. 11
from 1 to 11
1
–
S7 basic
communication
User-definable
Default
max. 8
from 0 to 8
8
Interfaces
1. Interface
Functionality
PLC S7-300, CPU Specifications CPU 312 IFM to CPU 318-2 DP
A5E00111190-01
MPI
Yes
DP Master
No
DP Slave
No
Galvanically isolated
No
1-41
CPUs
MPI
Voltages, Currents
Services
–
PD/OP
communication
Yes
–
Global data
communication
Yes
–
S7 basic
communication
Yes
–
S7 communication
Yes (server)
Transmission rates
19.2; 187.5 Kbps
Dimensions
Power supply
24V DC
20.4 V to 28.8 V
Permissible range
Current consumption (idle)
typical 0.7 A
Inrush current
typical 8A
l2t
0.4 A2s
External fusing for supply
lines (recommendation)
Circuit breaker; 2 A,
PD supply at MPI (15 to
30V DC)
max. 200 mA
Power losses
typical 8 W
Battery
Yes
Backup margin at 25
C and continuous CPU
buffering
min. 1 year
Battery shelf life at
25C
approx. 5 years
Assembly dimension
BHT (mm)
80125130
Weight
Approx. 0.53 kg
Programming language
STEP 7
Stored instructions
See Instruction List
Nesting levels
8
Accumulator
System functions (SFCs)
See Instruction List
System function blocks
(SFBs)
See Instruction List
User program security
Password protection
Programming
1-42
Type B or C
Yes
Clock back-up period
–
at 0 to 25C
Approx. 4 weeks
–
at 40 C
Approx. 3 weeks
–
at 60 C
Approx. 1 week
Battery charging time
Approx. 1 hour
PLC S7-300, CPU Specifications CPU 312 IFM to CPU 318-2 DP
A5E00111190-01
CPUs
1.4.4
CPU 314IFM
Special Features
Integrated I/Os (wired with 40-pole front connector)
Details on analog value processing and how to connect measuring transducers,
load and actuators to analog I/O is found in the Module Data reference manual.
Figures 1-14 and 1-15 on page 1-59 show wiring examples.
Memory card
The CPU 314 IFM is available in 2 versions: with and without Memory Card slot.
With slot for memory card:
6ES7 314-5AE10-0AB0
Without slot for memory card:
6ES7 314-5AE0x-0AB0
Integrated Functions of the CPU 314 IFM
Integrated
Functions
Process interrupt
Description
Interrupt input means: inputs configured with this function trigger a process
interrupt at the corresponding signal edge.
If you wish to use the digital inputs 126.0 to 126.3 as interrupt inputs, you must
program these using STEP 7.
Note: Your user program should access analog inputs of your CPU
individually per L PEW in order to avoid an increase of interrupt
response times. Double-word addressing can increase the access
times by up to 200 s!
Counter
Frequency meter
Counter A/B
The CPU 314 IFM offers these special functions as an alternative at the
digital inputs 126.0 to 126.3. For a description of these special
functions, please refer to the Integrated Functions Manual.
Positioning
CONT_C
CONT_S
PULSEGEN
These functions are not restricted to specific inputs and outputs of the
CPU 314 IFM. For a description of these functions, please refer to the
System and Standard Functions Reference Manual.
PLC S7-300, CPU Specifications CPU 312 IFM to CPU 318-2 DP
A5E00111190-01
1-43
CPUs
“Interrupt Inputs” of the CPU 314 IFM
If you want to assign interrupt functions to the digital inputs 126.0 to 126.4,
configure your CPU parameters in STEP 7 accordingly.
Note the following points:
These digital inputs have a very low signal delay. At this interrupt input, the module
recognizes pulses with a length as of approx. 10 to 50 s. Always use shielded
cable to connect active interrupt inputs in order to avoid interrupts triggered by line
interference.
Note The minimum pulse width of an interrupt trigger pulse is 50 s.
Start information for OB40
Table 1-10 shows the temporary (TEMP) variables of OB40 relevant for the
“Interrupt inputs” of the CPU 314 IFM. Refer to theSystem and Standard functions
reference manual for details on the process interrupt OB.
Table 1-11 Start Information for OB 40 for the Interrupt Inputs of the Integrated I/Os
Byte
Variable
Data Type
Description
6/7
OB40_MDL_ADDR
WORD
B#16#7C
Address of the interrupt triggering
module (in this case, the CPU)
8 on
OB40_POINT_ADDR
DWORD
See Figure 1-9
Signaling of the interrupt triggering
integrated inputs
1-44
PLC S7-300, CPU Specifications CPU 312 IFM to CPU 318-2 DP
A5E00111190-01
CPUs
Display of the Interrupt Inputs
In variable OB40_POINT_ADDR, you can view the interrupt inputs which have
triggered a process interrupt. Figure 1-9 shows the allocation of the interrupt inputs
to the bits of the double word.
Note: Several bits can be set if interrupts are triggered by several inputs within
short intervals (< 100 s). That is, the OB is started once only, even if several
interrupts are pending.
5 4 3 2 1 0
31 30
Bit No.
Reserved
PRIN from
PRIN from
PRIN from
PRIN from
I126.0
I126.1
I 126.2
I126.3
PRIN: Process
interrupt
Figure 1-9
Display of the States of the Interrupt Inputs of the CPU 314 IFM
PLC S7-300, CPU Specifications CPU 312 IFM to CPU 318-2 DP
A5E00111190-01
1-45
CPUs
Front View of the CPU 314 IFM
IN
OUT
OUT
M
L
+
M
Status and error LEDs
Mode selector switch
Compartment for backup battery or
rechargeable battery
Jumper (removable)
Connection for power supply and system ground
Multipoint interface MPI
Integrated I/Os
Memory Card slot (only -5AE10-)
Figure 1-10 Front View of the CPU 314 IFM
1-46
PLC S7-300, CPU Specifications CPU 312 IFM to CPU 318-2 DP
A5E00111190-01
CPUs
Technical Specifications of the CPU 314 IFM
CPU and Product Version
MLFB
6ES7 314-...-0AB0
Data areas and their retentive characteristics
-5AE03-
-5AE10-
Hardware version
01
01
Firmware version
V 1.1.0
V 1.1.0
Matching programming
package
STEP 7 V5.0,
Service Pack 3
Retentive data area as a
whole (inc. flags, timers,
counters)
max. 2 DB, 144 bytes
Bit memories
2048
Memory
Work memory
Clock memories
8 (1 memory byte)
Data blocks
max. 127 (DB 0 reserved)
integral
Expandable
32 KB
no
32 KB
No
Load memory
integral
48 KB RAM
48 KB
FEPROM
48 KB RAM
Expandable FEPROM
no
Up to 4 MB
Expandable RAM
no
No
Backup
Yes
With battery
All data
Without battery
144 bytes
Processing times
Processing times for
Preset
MB 0 to MB 15
Size
max. 8 KB
Adjustable retentivity
max. 2 DB, 144 data bytes
Preset
No retentivity
Local data (non-alterable)
1536 bytes
256 bytes
Per priority class
Blocks
OBs
See Instruction List
max. 8 KB
Size
Nesting depth
Per priority class
8
additional levels within
an error OB
4
0.3 s minimum
FBs
128
Word instructions
1 s minimum
max. 8 KB
Double integer math
2 s minimum
FCs
128
Floating-point math
instructions
50 s minimum
max. 8 KB
S7 counters
64
Adjustable retentivity
from C 0 to C 63
Preset
from C 0 to C 7
Counting range
0 to 999
Yes
Type
S7 timers
Size
Peripheral address area
Digital
0 to 123/0 to 123
–
124 to 127/124, 125
integral
Analog
256 to 751/256 to 751
–
128 to 135/128, 129
integral
128 bytes/128 bytes
SFB
Process image (cannot be
customized)
128
Digital channels
max. 992+20 integral/
max. 992+16 integral
Analog channels
max. 248+4 integral/
max. 124+1 integral
Adjustable retentivity
from T 0 to T 7
Preset
No retentive times
Timing range
10 ms to 9990 s
IEC Timers
Yes
SFB
Type
Size
Address areas (I/O)
IEC Counters
MB 0 to MB 143
Bit instructions
Timers/Counters and their retentive characteristics
Adjustable retentivity
PLC S7-300, CPU Specifications CPU 312 IFM to CPU 318-2 DP
A5E00111190-01
1-47
CPUs
Configuration
Communication functions
Rack
max. 4
PD/OP communication
Yes
Modules per module rack
max. 8; max. 7 in module
rack 3
Global data communication
Yes
Number of DP masters
integral
None
via CP
1
S7 message functions
Simultaneously active
Time
Yes
Accuracy
See Section 1.1.6
1
1
Size of GD packets
max. 22 bytes
–
8 bytes
Number of which
consistent
Yes
User data per job
max. 76 bytes
–
32 bytes for X/I_PUT/_GET;
Number of which
consistent
76 bytes for
X_SEND/_RCV
S7 communication
Yes (server)
User data per job
max. 160 bytes
–
32 bytes
0
Value range
0 to 32767 hours
Selectivity
1 hour
Retentive
Yes
S7-compatible
communication
Yes (via CP and loadable
FC)
Yes
User data per job
Dependent on CP
–
Dependent on CP
On PLC
Master
On MPI
Master/Slave
Status/Modify Variables
Variable
Number
Number of which
consistent
Number of which
consistent
Standard communication
Testing and commissioning functions
Yes
Inputs, outputs, flags, DBs,
timers, counters
Dependent on CP
–
Dependent on CP
Number of which
consistent
Monitor Variables
max. 30
Number of connection
resources
–
Modify Variables
max. 14
Yes
Variable
Inputs, outputs
Number
max. 10
Monitor block
Yes
Single sequence
Yes
Breakpoint
2
Diagnostic buffer
Yes
100
Number of entries
(non-alterable)
Yes (via FC and loadable
FC)
User data per job
–
Force
1
Receiver
Number
Clock synchronisation
Sender
–
S7 basic communication
Yes
Backed-up
Operating hours counter
–
max. 40
Alarm-S blocks
Real-time clock
Number of GD packets
12 for PD/OP/S7 basic/S7
communication
Reservation for
–
PD communication
User-definable
Default
max. 11
from 1 to 11
1
–
OP communication
User-definable
Default
max. 11
from 1 to 11
1
–
S7 basic
communication
User-definable
Default
max. 8
from 0 to 8
8
Interfaces
1. Interface
Functionality
1-48
MPI
Yes
DP Master
No
DP Slave
No
Galvanically isolated
No
PLC S7-300, CPU Specifications CPU 312 IFM to CPU 318-2 DP
A5E00111190-01
CPUs
MPI
Services
–
PD/OP
communication
Yes
–
Global data
communication
Yes
–
S7 basic
communication
Yes
–
S7 communication
Yes (server)
Transmission rates
19.2; 187.5 Kbps
Dimensions
Assembly dimension
BHT (mm)
160125130
Weight
Approx. 0.9 kg
PD supply at MPI (15 to
30V DC)
max. 200 mA
Power losses
Typically 16 W
Battery
Yes
Backup margin at 25
C and continuous CPU
buffering
min. 1 year
Battery shelf life at
25C
approx. 5 years
Accumulator
Programming
–
at 0 to 25C
Approx. 4 weeks
–
at 40 C
Approx. 3 weeks
–
at 60 C
Approx. 1 week
Battery charging time
Programming language
STEP 7
Integrated inputs/outputs
Stored instructions
See Instruction List
Addresses of integral
Nesting levels
8
System functions (SFCs)
See Instruction List
System function blocks
(SFBs)
See Instruction List
User program security
Password protection
Voltages, Currents
Yes
Clock back-up period
Approx. 1 hour
Digital inputs
E 124.0 to E 127.7
Digital outputs
A 124.0 to A 127.7
Analog inputs
PIW 128 to PIW 134
Analog outputs
PQW 128
Integrated Functions
Power supply
24V DC
1 or 2, 2 directional
comparisons
20.4 to 28.8 V
(see Integrated Functions)
Permissible range
Counter
Current consumption (idle)
typical 1.0 A
Inrush current
typical 8A
l2t
0.4 A2s
External fusing for supply
lines (recommendation)
Circuit breaker; 2 A
Type B or C
manual
Frequency meter
up to 10 kHz max.
(see Integrated Functions)
manual
Positioning
Channel 1
(see Integrated Functions)
manual
PLC S7-300, CPU Specifications CPU 312 IFM to CPU 318-2 DP
A5E00111190-01
1-49
CPUs
Characteristic Features of the Integrated Inputs and Outputs of the CPU 314 IFM
Table 1-12 Characteristic Features of the Integrated Inputs and Outputs of the CPU 314 IFM
Characteristics
Inputs/Outputs
Analog inputs
Analog output
Digital inputs
Digital outputs
1-50
Voltage inputs 10 V
All information required for
Current inputs 20 mA
analog value display, as well as
Resolution 11 bits + sign bit
Galvanically isolated
Voltage output 10 V
Current output 20 mA
Resolution 11 bits + sign bit
connecting measuring
transducers, loads and actuators
to the analog I/Os
can be found in the Module
Specifications Reference Manual.
Galvanically isolated
Special inputs (E 126.0 to E 126.3)
for
Input frequency up to 10 kHz
“Standard” Inputs
Galvanically isolated
Non-isolated
Rated input voltage 24V DC
Suitable for switch and 2-wire proximity switches (BEROs)
Output current 0.5 A
Rated load voltage 24V DC
Galvanically isolated
Suitable for solenoid valves and DC contactors
PLC S7-300, CPU Specifications CPU 312 IFM to CPU 318-2 DP
A5E00111190-01
CPUs
Technical Specifications of the Analog Inputs of the CPU 314IFM
Module-Specific Data
Number of inputs
4
Cable length
Shielded
max. 100 m (109yd.)
Voltages, Currents, Potentials
Galvanic isolation
between channels and
between inputs and
MANA (UCM)
between MANA and
Conversion time/Resolution
(per channel)
Basic conversion time
Resolution (inc.
overdrive range)
Common-mode
Linearity error (referred to
input range)
0.06 %
75V DC
60V AC
Accuracy of reproducibility
(in transient state at 25°C,
referring to input range)
0.06 %
500V DC
Status, Interrupts, Diagnostics
Momentary value
encoding
(successive
approximation)
100 s
11 bits + sign bit
Operational error limits
(throughout temperature
range, relative to input
range)
Voltage input
Current input
Interrupts
None
Diagnostic functions
None
Sensor Selection Data
Input ranges
(rated value)/input
resistance
Voltage
Current
10 V/50 k
Permissible input voltage
for voltage input
(destruction limit)
max. 30 V
continuous;
38 V for max. 1 s
(pulse duty factor
1:20)
> 40 dB
20 mA/105.5 Permissible input current for 34 mA
current input (destruction
limit)
interference (UCM<1.0
V)
Crosstalk between the
inputs
0.8 %
1.0V DC
Interference Suppression, Error Limits
Interference voltage
suppression
0.9 %
0.01 %/K
Analog Value Generation
Measurement principle
Voltage input
Current input
Temperature error (referred
to input range)
Minternal (UISO)
Insulation tested at
Basic error limits
(operational limit at 25°C,
relative to input range)
Yes
backplane bus
Permissible potential
difference
Interference Suppression, Error Limits, Continued
> 60 dB
Connecting signal
generators
for voltage
measurement
1.0 %
for current
1.0 %
measurement
as 2-pole measurement
transducer
Possible
Not possible
Possible
as 4-pole measurement
transducer
PLC S7-300, CPU Specifications CPU 312 IFM to CPU 318-2 DP
A5E00111190-01
1-51
CPUs
Technical Specifications of the Analog Output of the CPU 314IFM
Module-Specific Data
Number of outputs
Output ripple; Range of 0 to
50 kHz (referring to output
range)
1
Cable length
Shielded
0.05 %
Status, Interrupts; Diagnostics
max. 100 m (109yd.)
Interrupts
None
Diagnostic functions
None
Voltages, Currents, Potentials
Galvanic isolation
Between channels and
Yes
backplane bus
Permissible potential
difference
between MANA and
Output ranges (rated
values)
75V DC
60V AC
Minternal (UISO)
Insulation tested at
Actuator Selection Data
Voltage
Current
500V DC
Resolution (inc. overdrive
range)
11 bits + sign bit
Conversion time
40 s
For voltage output
min. 2.0 k
capacitive load
max. 0.1 F
For current output
max. 300 inductive load
max. 0.1 mH
Voltage output
For resistive load
For capacitive load
For inductive load
0.6 ms
Short-circuit protection
Short-circuit current
1.0 ms
Current output
0.5 ms
Idle voltage
Connection of substitute
values
No
Settling time
Interference Suppression, Error Limits
Voltage output
Current output
with ref. to MANA
1.0 %
1.0 %
Yes
max. 40 mA
max. 16 V
Destruction limit for
externally applied
voltages/currents
Voltages at the output
Current
max. 15 V,
continuous;
15 V for max. 1
s (duty factor 1:20)
max. 30 mA
Connecting actuators
for voltage output
Basic error limit (operational
limit at 25°C, relative to
output range)
Voltage output
Current output
0.8 %
Temperature error (relative
to output range)
0.01 %/K
Linearity error (relative to
output range)
0.06 %
Accuracy of reproducibility
(in transient state at 25°C,
relative to output range)
0.05 %
1-52
20 mA
Load impedance
Analog Value Generation
Operational error limits
(throughout temperature
range, relative to output
range)
10 V
0.9 %
2-wire connection
Possible
4-wire connection
Not possible
for current output
2-wire connection
Possible
PLC S7-300, CPU Specifications CPU 312 IFM to CPU 318-2 DP
A5E00111190-01
CPUs
Technical Specifications of the Special Inputs of the CPU 314IFM
Module-Specific Data
Number of inputs
Sensor Selection Data
4
I 126.0 to 126.3
Cable length
Shielded
Input voltage
Rated value
For “1” signal
max. 100 m (109yd.)
Voltages, Currents, Potentials
Number of inputs that can
be triggered simultaneously
4
For “0” signal
4
4
up to 40°C
Status, Interrupts; Diagnostics
Status display
Input current
For “1” signal
up to 60°C
(vertical configuration)
11 V to 30 V
18 to 30 V with
angular encoder and
integrated
”Positioning”
function
-3 to 5 V
(horizontal
configuration)
24V DC
Input delay time
For “0” to “1”
For “1” to “0”
< 50 s (typical 17
s)
Input characteristic
to IEC 1131, Type 2
Connection of 2-wire
BEROs
Possible
1 green LED per
channel
Interrupts
Process interrupt
Configurable
Diagnostic functions
None
typical 6.5 mA
Permissible quiescent
< 50 s (typical 20
s)
max. 2 mA
current
Time, Frequency
Internal conditioning time
for
Interrupt processing
max. 1.2 ms
Input frequency
10 kHz
PLC S7-300, CPU Specifications CPU 312 IFM to CPU 318-2 DP
A5E00111190-01
1-53
CPUs
Technical Specifications of the Digital Inputs of the CPU 314IFM
Module-Specific Data
Number of inputs
Status, Interrupts; Diagnostics
16
Status display
1 green LED per
channel
max. 600 m
Interrupts
None
max. 1000 m
Diagnostic functions
None
Cable length
Unshielded
Shielded
Voltages, Currents, Potentials
Sensor Selection Data
Rated load current L+
24V DC
Input voltage
Polarity reversal
Yes
Rated value
For “1” signal
For “0” signal
protection
Number of inputs that can
be triggered simultaneously
16
16
16
up to 40°C
Galvanic isolation
between channels and
Yes
backplane bus
Permissible potential
difference
Between different
-3 to 5 V
For “1” signal
typical 7 mA
Input delay time
up to 60°C
(vertical configuration)
11 to 30 V
Input current
(horizontal
configuration)
24V DC
For “0” to “1”
For “1” to “0”
1.2 to 4.8 ms
Input characteristic
to IEC 1131, Type 2
Connection of 2-wire
BEROs
Possible
Permissible quiescent
75V DC
60V AC
1.2 to 4.8 ms
max. 2 mA
current
circuits
Insulation tested at
500V DC
Current consumption
on power supply L+
1-54
max. 40 mA
PLC S7-300, CPU Specifications CPU 312 IFM to CPU 318-2 DP
A5E00111190-01
CPUs
Technical Specifications of the Digital Outputs of the CPU 314IFM
Remarks
When the supply voltage is switched on a pulse occurs on the digital outputs! This
can be 50 ms long within the permissible output current range. You must not,
therefore, use the digital outputs to trigger high-speed counters.
Module-Specific Data
Number of outputs
Actuator Selection Data
16
For “1” signal
Cable length
Unshielded
Shielded
Output voltage
max. 600 m
Output current
max. 1000 m
For “1” signal
Voltages, Currents, Potentials
Rated load current L+
24V DC
Polarity reversal
No
(horizontal
Rated value
0.5 A
Permissible range
5 mA to 0.6 A
For “0” signal
Load impedance range
48 to 4 k
Lamp load
max. 5 W
configuration)
max. 4 A
Parallel connection of 2
outputs
up to 40°C
max. 2 A
For dual-channel
up to 60°C
(vertical configuration)
triggering of a load
max. 2 A
up to 40°C
max. 0.5 mA
(residual current)
protection
Total current of outputs (per
group)
min. L+ (-0.8 V)
For performance
Possible, only
outputs of the same
group
Not possible
increase
Galvanic isolation
between channels and
Yes
backplane bus
Between the channels
in groups of
Permissible potential
difference
Between different
8
For resistive load
For inductive load to
max. 100 Hz
max. 0.5 Hz
IEC947-5-1, DC 13
75V DC
60V AC
500V DC
Current consumption
on L+ supply (no load)
Possible
Switching frequency
Yes
circuits
Insulation tested at
Triggering of a digital input
max. 100 mA
For lamp load
max. 100 Hz
Inductive breaking voltage
limited internally to
typical L+ (- 48 V)
Short-circuit protection of
the output
yes, electronically
timed
Response threshold
typical 1a
Status, Interrupts; Diagnostics
Status display
1 green LED per
channel
Interrupts
None
Diagnostic functions
None
PLC S7-300, CPU Specifications CPU 312 IFM to CPU 318-2 DP
A5E00111190-01
1-55
CPUs
Wiring diagram of the CPU 314 IFM
Figure 1-11 shows the wiring diagram of the CPU 314 IFM.
For the connection of integrated I/O you require two 40-pole front connectors
(Order no.: 6ES7392-1AM00-0AA0).
Always wire up digital inputs 126.0 to 126.3 with shielded cable due to their low
input delay time.
!
Caution
Wiring errors at the analog outputs can cause the integrated analog I/O of the
CPU to be destroyed! (for example, if the interrupt inputs are wired by mistake to
the analog output).
The analog output of the CPU is only indestructible up to 15 V (output with respect
to MANA).
Digital inputs
I 126.0
I 126.1
I 126.2
I 126.3
Special
inputs
Analog
outputs
AOU
AOI
AIU
AII
AI-
PQW 128
AIU
AII
AIAIU
AII
AIAIU
AII
AI-
PIW 130
1 L+
PIW 128
Digital outputs
1 L+
2L+
124.0
124.1
124.2
124.3
124.4
124.5
124.6
124.7
124.0
124.1
124.2
124.3
124.4
124.5
124.6
124.7
2M
3L+
Analog
inputs
125.0
125.1
125.2
125.3
125.4
125.5
125.6
125.7
PIW 132
PIW 134
125.0
125.1
125.2
125.3
125.4
125.5
125.6
125.7
1M
3M
MANA
Figure 1-11 Wiring diagram of the CPU 314 IFM
1-56
PLC S7-300, CPU Specifications CPU 312 IFM to CPU 318-2 DP
A5E00111190-01
CPUs
Basic Circuit Diagrams of the CPU 314 IFM
Figures 1-12 and 1-13 show the basic circuit diagrams for the integrated
inputs/outputs of the CPU 314 IFM.
L+
CPU interface
+
Ref
M
DAC
V
M
MANA
A
Multiplexer
V
A
ADC
CPU interface
M
MANA
Internal supply
MANA
Figure 1-12 Basic Circuit Diagram of the CPU 314 IFM (Special Inputs and Analog Inputs/Outputs)
PLC S7-300, CPU Specifications CPU 312 IFM to CPU 318-2 DP
A5E00111190-01
1-57
CPUs
1 L+
2L+
24V
M
M
CPU
interface
2M
3L+
24V
1M
M
3M
24V
Figure 1-13 Basic Circuit Diagram of the CPU 314 IFM (Digital Inputs/Outputs)
1-58
PLC S7-300, CPU Specifications CPU 312 IFM to CPU 318-2 DP
A5E00111190-01
CPUs
Wiring the Analog Inputs
1 L+
AIU
AII
AI_
L+
2-wire
measurement
transducer
AI_ and MANA - we recommend to jumper
them.
MANA
M
Figure 1-14 Connecting 2-wire measurement transducers to the analog inputs of CPU 314 IFM
1 L+
Shielded cables
L+
AIU
AII
AI_
AIU
AII
AI_
MANA
M
4-wire
measurement
transducer
M
Unwired channel groups:
Connect AI_ with MANA.
When using 4-wire measurement transducers,
we recommend you interconnect AI_ and MANA.
Figure 1-15 Wiring of 4-wire measurement transducers to the analog inputs of CPU 314 IFM
PLC S7-300, CPU Specifications CPU 312 IFM to CPU 318-2 DP
A5E00111190-01
1-59
CPUs
1.4.5
CPU 315
Technical Specifications of the CPU 315
CPU and Product Version
MLFB
Data areas and their retentive characteristics
6ES7 315-5AF03-0AB0
Hardware version
01
Firmware version
V 1.1.0
Matching programming
package
STEP 7 V 5.0;
Service Pack 03
Retentive data area as a
whole (inc. flags, timers,
counters)
4736 bytes
Bit memories
2048
Memory
Work memory
Clock memories
8 (1 memory byte)
Data blocks
max. 255 (DB 0 reserved)
integral
48 KB
Expandable
no
Load memory
Preset
MB 0 to MB 15
Size
max. 16 KB
Adjustable retentivity
max. 8 DB, 4096 data bytes
in all
Preset
No retentivity
80 KB RAM
Expandable FEPROM
Up to 4 MB
Local data (non-alterable)
max. 1536 bytes
no
256 bytes
Yes
Blocks
All data
OBs
See Instruction List
max. 16 KB
Expandable RAM
With battery
Without battery
4736 bytes, configurable,
(data, flags, timers)
Processing times for
Bit instructions
0.3 s minimum
Word instructions
1 s minimum
Double integer math
Floating-point math
instructions
Per priority class
Size
Nesting depth
Processing times
MB 0 to MB 255
integral
Backup
Adjustable retentivity
Per priority class
8
additional levels within
an error OB
4
FBs
max. 192
2 s minimum
max. 16 KB
50 s minimum
FCs
max. 192
max. 16 KB
Size
Size
Timers/Counters and their retentive characteristics
Address areas (I/O)
S7 counters
64
Peripheral address area
Adjustable retentivity
from C 0 to C 63
Digital/Analog
Preset
from C 0 to C 7
1 KB/1 KB (freely
addressable)
Counting range
0 to 999
Process image (cannot be
customized)
128 bytes/128 bytes
Digital channels
max. 1024/1024
Analog channels
max. 256/128
IEC Counters
Yes
Type
SFB
S7 timers
128
Adjustable retentivity
from T 0 to T 127
Preset
No retentive times
Timing range
10 ms to 9990 s
IEC Timers
Yes
SFB
Type
1-60
PLC S7-300, CPU Specifications CPU 312 IFM to CPU 318-2 DP
A5E00111190-01
CPUs
Configuration
Communication functions
Rack
max. 4
PD/OP communication
Yes
Modules per module rack
max. 8
Global data communication
Yes
Number of DP masters
Number of GD packets
integral
None
–
Sender
1
via CP
1
–
Receiver
1
S7 message functions
Simultaneously active
50
Size of GD packets
max. 22 bytes
–
8 bytes
Alarm-S blocks
Time
Real-time clock
Backed-up
Yes
Accuracy
See Section 1.1.6
Operating hours counter
User data per job
max. 76 bytes
–
32 bytes for X/I_PUT/_GET;
Number of which
consistent
76 bytes for
X_SEND/_RCV
S7 communication
Yes (server)
User data per job
max. 160 bytes
Value range
0 to 32767 hours
–
32 bytes
Selectivity
1 hour
Retentive
Yes
Yes
On PLC
Master
On MPI
Master/Slave
Variable
Number of which
consistent
S7-compatible
communication
Yes (via CP and loadable
FC)
User data per job
Dependent on CP
–
Dependent on CP
Number of which
consistent
Standard communication
Yes
Inputs, outputs, flags, DPs,
timers, counters
Dependent on CP
–
Dependent on CP
Number of which
consistent
–
Monitor Variables
max. 30
–
Modify Variables
max. 14
Number of connection
resources
Yes
Variable
Inputs, outputs
Number
max. 10
Monitor block
Yes
Single sequence
Yes
Breakpoint
2
Diagnostic buffer
Yes
100
Number of entries
(non-alterable)
Yes (via CP and loadable
FC)
User data per job
Number
Force
0
Status/Modify Variables
Yes
1
Testing and commissioning functions
S7 basic communication
Number
Clock synchronisation
Yes
Number of which
consistent
12 for PD/OP/S7 basic/S7
communication
Reservation for
–
PD communication
User-definable
Default
max. 11
from 1 to 11
1
–
OP communication
User-definable
Default
max. 11
from 1 to 11
1
–
S7 basic
communication
User-definable
Default
max. 8
from 0 to 8
8
Interfaces
1. Interface
Functionality
PLC S7-300, CPU Specifications CPU 312 IFM to CPU 318-2 DP
A5E00111190-01
MPI
Yes
DP Master
No
DP Slave
No
Galvanically isolated
No
1-61
CPUs
MPI
Voltages, Currents
Services
–
PD/OP
communication
Yes
–
Global data
communication
Yes
–
S7 basic
communication
Yes
–
S7 communication
Yes (server)
Transmission rates
19.2; 187.5 Kbps
Dimensions
Power supply
24V DC
20.4 to 28.8 V
Permissible range
Current consumption (idle)
typical 7.0 A
Inrush current
typical 8A
l2t
0.4 A2s
External fusing for supply
lines (recommendation)
Circuit breaker; 2 A
PD supply at MPI (15 to
30V DC)
max. 200 mA
Power losses
typical 8 W
Battery
Yes
Backup margin at 25
C and continuous CPU
buffering
min. 1 year
Battery shelf life at
25C
approx. 5 years
Type B or C
Assembly dimension
BHT (mm)
80125130
Weight
Approx. 0.53 kg
Programming language
STEP 7
Stored instructions
See Instruction List
Nesting levels
8
System functions (SFCs)
See Instruction List
–
at 0 to 25C
Approx. 4 weeks
System function blocks
(SFBs)
See Instruction List
–
at 40 C
Approx. 3 weeks
–
at 60 C
Approx. 1 week
User program security
Password protection
Programming
1-62
Accumulator
Battery charging time
Yes
Approx. 1 hour
PLC S7-300, CPU Specifications CPU 312 IFM to CPU 318-2 DP
A5E00111190-01
CPUs
1.4.6
CPU 315-2 DP
DP master or DP slave
You can operate the CPU 315-2 DP on your 2nd interface (PROFIBUS-DP
interface) as DP Master or DP Slave in a PROFIBUS-DP network.
For details on PROFIBUS-DP characteristics of CPU 315-2 DP refer to Chapter 2.
CPU 315-2 DP, Technical Data
CPU and Product Version
MLFB
S7 timers
6ES7 315-2AF03-0AB0
Hardware version
01
Firmware version
V 1.1.0
Matching programming
package
STEP 7 V 5.0;
Service Pack 03
Memory
integral
64 KB
Expandable
no
Load memory
128
Adjustable retentivity
from T 0 to T 127
Preset
No retentive times
Timing range
10 ms to 9990 s
IEC Timers
Yes
SFB
Type
Data areas and their retentive characteristics
Work memory
Retentive data area as a
whole (inc. flags, timers,
counters)
4736 bytes
Bit memories
2048
integral
96 KB RAM
Expandable FEPROM
Up to 4 MB
Expandable RAM
no
Clock memories
8 (1 memory byte)
Yes
Data blocks
max. 255 (DB 0 reserved)
Backup
Adjustable retentivity
MB 0 to MB 255
Preset
MB 0 to MB 15
Processing times
Processing times for
Local data (non-alterable)
max. 1536 bytes
256 bytes
With battery
All data
Without battery
4736 bytes
max. 16 KB
Adjustable retentivity
8 DB; max. 4096 data bytes
Preset
No retentivity
Bit instructions
0.3 s minimum
Word instructions
1 s minimum
Blocks
Double integer math
2 s minimum
OBs
See Instruction List
Floating-point math
instructions
50 s minimum
max. 16 KB
S7 counters
Per priority class
Size
Nesting depth
Timers/Counters and their retentive characteristics
Size
64
Per priority class
8
additional levels within
an error OB
4
Adjustable retentivity
from C 0 to C 63
Preset
from C 0 to C 7
FBs
max. 192
Counting range
max. 16 KB
0 to 999
IEC Counters
Yes
FCs
max. 192
SFB
max. 16 KB
Type
PLC S7-300, CPU Specifications CPU 312 IFM to CPU 318-2 DP
A5E00111190-01
Size
Size
1-63
CPUs
Address areas (I/O)
Single sequence
Yes
Peripheral address area,
digital/analog
1 KB/1 KB (freely
addressable)of these are
Breakpoint
2
Diagnostic buffer
Yes
1 KB/1 KB
100
distributed
Process image (cannot be
customized)
128/128 bytes
Digital channels
max. 8192 (minus 1 byte
diagnostic address per DP
slave)/8192
Centralized
Analog channels
Centralized
Number of entries
(non-alterable)
Communication functions
PD/OP communication
Yes
Global data communication
Yes
max. 1024/1024
max. 512 (minus 1 byte
diagnostic address per DP
slave)/512
max. 256/128
Configuration
Number of GD packets
–
Sender
1
–
Receiver
1
Size of GD packets
max. 22 bytes
–
8 bytes
Number of which
consistent
Rack
max. 4
S7 basic communication
Yes (server)
Modules per module rack
max. 8
User data per job
max. 76 bytes
–
32 bytes for X/I_PUT/_GET;
Number of DP masters
integral
1
via CP
1
S7 message functions
Simultaneously active
max. 50
Yes
User data per job
max. 160 bytes
–
32 bytes
S7-compatible
communication
Yes (via CP and loadable
FC)
Backed-up
Yes
User data per job
Dependent on CP
Accuracy
See Section 1.1.6
–
Dependent on CP
1
Number of which
consistent
Number
0
Standard communication
Value range
0 to 32767 hours
Selectivity
1 hour
Retentive
Yes
Operating hours counter
Clock synchronisation
Yes
On PLC
Master
CP on MPI
Master/Slave
Status/Modify Variables
Variable
Number
12 for PD/OP/S7 basic/S7
communication
Reservation for
max. 11
from 1 to 11
1
Inputs, outputs, flags, DBs,
timers, counters
–
OP communication
User-definable
Default
max. 11
from 1 to 11
1
–
S7 basic
communication
User-definable
Default
max. 8
Yes
Monitor Variables
max. 30
Modify Variables
max. 14
Yes
Variable
Inputs, outputs
Number
max. 10
1-64
Dependent on CP
Number of which
consistent
PD communication
User-definable
Default
–
Monitor block
Dependent on CP
–
–
–
Force
Yes (via CP and loadable
FC)
User data per job
Number of connection
resources
Testing and commissioning functions
Number of which
consistent
Yes
Real-time clock
76 bytes for
X_SEND/_RCV
S7 communication
Alarm-S blocks
Time
Number of which
consistent
Routing connections
from 0 to 8
8
max. 4
Yes
PLC S7-300, CPU Specifications CPU 312 IFM to CPU 318-2 DP
A5E00111190-01
CPUs
Interfaces
DP Slave
1. Interface
MPI
Yes
DP Master
No
DP Slave
No
Galvanically isolated
No
MPI
–
–
–
244 bytes I/244 bytes O
–
max. 32 with max. 32 bytes
each
Address areas
Global data
communication
Yes
Assembly dimension
BHT mm
S7 basic
communication
Yes
S7 communication
Yes (server)
Weight
Approx. 0.53 kg
Programming
19.2; 187.5 Kbps
Programming language
STEP 7
Stored instructions
See Instruction List
Nesting levels
8
System functions (SFCs)
See Instruction List
See Instruction List
Password protection
DP Master
Yes
DP Slave
Yes
System function blocks
(SFBs)
–
Yes, can be activated
User program security
Status/Modify;
Program; Routing
Voltages, Currents
Direct data exchange
Yes
Point-to-point
connection
No
Default setting
None
Galvanically isolated
80125130
(mm)
Yes
Power supply
24V DC
20.4 to 28.8 V
Permissible range
Current consumption (idle)
typical 0.9 A
Inrush current
typical 8A
2
DP Master
... up to 12 Mbps
Transfer memory
Dimensions
Functionality
Sie3802f.gsg
Transmission rate
Yes
Transmission rates
Yes, can be activated
Device master file
PD/OP
communication
2. Interface
Status/Modify;
Program via
PROFIBUS
Routing
Services
–
Services
–
Functionality
Services
–
Equidistance
Yes
–
SYNC/FREEZE
Yes
–
Activation/deactivat Yes
ion of DP slaves
l t
0.4 A2s
External fusing for supply
lines (recommendation)
Circuit breaker; 2 A,
PD supply at MPI (15 to
30V DC)
max. 200 mA
Type B or C
Power losses
typical 10 W
Transmission rates
Up to 12 Mbps
Battery
Yes
Number of DP slaves
max. 64
min. 1 year
Address area
max. 1 KB I/1 Kbyte O
Backup margin at 25
C and continuous CPU
buffering
User data per DP slave
max. 244 bytes I and
244 bytes O
Battery shelf life at
25C
approx. 5 years
Accumulator
PLC S7-300, CPU Specifications CPU 312 IFM to CPU 318-2 DP
A5E00111190-01
Yes
–
at 0 to 25C
Approx. 4 weeks
–
at 40 C
Approx. 3 weeks
–
at 60 C
Approx. 1 week
Battery charging time
Approx. 1 hour
1-65
CPUs
1.4.7
CPU 316-2 DP
DP master or DP slave
You can operate the CPU 316-2 DP on your 2nd interface (PROFIBUS-DP
interface) as DP Master or DP Slave in a PROFIBUS-DP network.
For details on PROFIBUS-DP characteristics of CPU 316-2 DP refer to Chapter 2.
CPU 316-2 DP, Technical Data
CPU and Product Version
MLFB
S7 timers
6ES57 316-2AG00-0AB0
Hardware version
01
Firmware version
V 1.1.0
Matching programming
package
STEP 7 V 5.0;
Service Pack 03
Memory
integral
128 KB
Expandable
no
Load memory
128
Adjustable retentivity
from T 0 to T 127
Preset
No retentive times
Timing range
10 ms to 9990 s
IEC Timers
Yes
SFB
Type
Data areas and their retentive characteristics
Work memory
Retentive data area as a
whole (inc. flags, timers,
counters)
4736 bytes
Bit memories
2048
integral
192 KB
Expandable FEPROM
Up to 4 MB
no
Clock memories
8 (1 memory byte)
Yes
Data blocks
511 (DB 0 reserved)
Expandable RAM
Backup
Adjustable retentivity
MB 0 to MB 255
Preset
MB 0 to MB 17
Processing times
Processing times for
Local data (non-alterable)
max. 1536 bytes
256 bytes
With battery
All data
Without battery
4736 bytes
max. 8 DB 4096 data bytes
Preset
No retentivity
0.3 s minimum
Word instructions
1 s minimum
Blocks
Double integer math
2 s minimum
OBs
See Instruction List
Floating-point math
instructions
50 s minimum
max. 16 KB
S7 counters
Per priority class
Size
Nesting depth
64
Per priority class
8
additional levels within
an error OB
4
Adjustable retentivity
from C 0 to C 63
Preset
from C 0 to C 7
FBs
max. 256
Counting range
0 to 999
max. 16 KB
Yes
FCs
max. 256
SFB
max. 16 KB
IEC Counters
max. 16 KB
Adjustable retentivity
Bit instructions
Timers/Counters and their retentive characteristics
Size
Type
1-66
Size
Size
PLC S7-300, CPU Specifications CPU 312 IFM to CPU 318-2 DP
A5E00111190-01
CPUs
Address areas (I/O)
Monitor block
Yes
Peripheral address area,
digital/analog
2 KB/2 KB (freely
addressable)
Single sequence
Yes
Breakpoint
2
2 KB/2 KB
Diagnostic buffer
Yes
Process image (cannot be
customized)
128/128 bytes
100
Digital channels
max. 16384 (minus 1 byte
diagnostic address per DP
slave)/16384
Communication functions
PD/OP communication
Yes
max. 1024/1024
Global data communication
Yes
Distributed
Centralized
Analog channels
Centralized
max. 1024 (minus 1 byte
diagnostic address per DP
slave)/1024
max. 256/128
Configuration
Rack
max. 4
Modules per
max. 8
Rack
integral
1
via CP
1
Number of GD packets
–
Sender
1
–
Receiver
1
Size of GD packets
max. 22 bytes
–
8 bytes
Number of which
consistent
S7 basic communication
Yes
User data per job
max. 76 bytes
–
32 bytes for X/I_PUT/_GET;
Number of DP masters
Number of entries
(non-alterable)
Number of which
consistent
76 bytes for
X_SEND/_RCV
S7 message functions
S7 communication
Yes (server)
Simultaneously active
User data per job
max. 160 bytes
–
32 bytes
max. 50
Alarm-S blocks
Time
Yes
S7-compatible
communication
Yes (via CP and loadable
FC)
Backed-up
Yes
User data per job
Dependent on CP
Accuracy
See Section 1.1.6
–
Dependent on CP
Real-time clock
1
Number of which
consistent
Number
0
Standard communication
Value range
0 to 32767 hours
Selectivity
1 hour
Retentive
Yes
Operating hours counter
Clock synchronisation
Yes
Dependent on CP
–
Dependent on CP
Number of which
consistent
Master
Number of connection
resources
On MPI
Master/Slave
Status/Modify Variables
Variable
Number
12 for PD/OP/S7 basic/S7
communication
Reservation for
–
PD communication
User-definable
Default
max. 11
from 1 to 11
1
Inputs, outputs, flags, DBs,
timers, counters
–
OP communication
User-definable
Default
max. 11
from 1 to 11
1
–
S7 basic
communication
User-definable
Default
max. 8
Yes
–
Monitor Variables
max. 30
–
Modify Variables
max. 14
Force
Yes (via CP and loadable
FC)
User data per job
On PLC
Testing and commissioning functions
Number of which
consistent
Yes
Variable
Inputs, outputs
Number
max. 10
Routing connections
PLC S7-300, CPU Specifications CPU 312 IFM to CPU 318-2 DP
A5E00111190-01
from 0 to 8
8
max. 4
1-67
CPUs
Interfaces
DP Slave
1. Interface
Functionality
–
MPI
Yes
DP Master
No
DP Slave
No
Galvanically isolated
No
MPI
No
Services
Status/Modify;
Program; Routing
Yes, can be activated
Device master file
Siem806f.gsg
Transmission rate
Up to 12 Mbps
Transfer memory
244 bytes I/244 bytes O
–
max. 32 with max. 32 bytes
each
Address areas
Dimensions
–
PD/OP
communication
Yes
–
Global data
communication
Yes
–
Services
S7 basic
communication
Yes
S7 communication
Assembly dimension
BHT (mm)
80125130
Weight
Approx. 0.53 kg
Programming
Programming language
STEP 7
Yes (server)
Stored instructions
See Instruction List
19.2; 187.5 Kbps
Nesting levels
8
2. Interface
System functions (SFCs)
See Instruction List
Functionality
System function blocks
(SFBs)
See Instruction List
User program security
Password protection
–
Transmission rates
DP Master
Yes
DP Slave
Yes
–
Yes, can be activated
Status/Modify;
Program; Routing
Power supply
24V DC
Direct data exchange
Yes
20.4 to 28.8 V
Point-to-point
connection
No
Current consumption (idle)
typical 0.9A
Inrush current
typical 8A
Default setting
None
Galvanically isolated
Yes
DP Master
Voltages, Currents
Services
Permissible range
2
l t
0.4 A2s
External fusing for supply
lines (recommendation)
Circuit breaker; 2 A,
max. 200 mA
Type B or C
–
Equidistance
Yes
PD supply at MPI (15 to
30V DC)
–
SYNC/FREEZE
Yes
Power losses
typical 10 W
–
Activation/deactivat Yes
ion of DP slaves
Battery
Yes
Backup margin at 25
C and continuous CPU
buffering
min. 1 year
Battery shelf life at
25C
approx. 5 years
Transmission rates
Up to 12 Mbps
Number of DP slaves
max. 125
Address area
max. 2 KB I/2 KB O
User data per DP slave
max. 244 bytes I and
244 bytes O
Accumulator
1-68
Yes
Clock back-up period
–
at 0 to 25C
Approx. 4 weeks
–
at 40 C
Approx. 3 weeks
–
at 60 C
Approx. 1 week
Battery charging time
Approx. 1 hour
PLC S7-300, CPU Specifications CPU 312 IFM to CPU 318-2 DP
A5E00111190-01
CPUs
1.4.8
CPU 318-2
Special Features
4 accumulators
The configuration of MPI interfaces can be changed: MPI or PROFIBUS DP
(DP Master).
Configurable data areas (Process image, local data)
Information on differences between CPU 318-2 and other CPUs is found in
Chapter 4.1.
DP master or DP slave
You can operate the CPU 318-2 DP as DP Master or DP Slave in a
PROFIBUS-DP network. However, note that only one of the interfaces can be a
DP Slave. For details on PROFIBUS-DP characteristics of CPU 318-2 DP refer to
Chapter 2.
Definable Data Areas and Occupied Working Memory
In your CPU 318-2 configuration, you can change the size of the I/O process
image and the local data areas.
Increasing default values for the process image and local data requires additional
memory that would otherwise be available for user programs.
Take following dimensions into account:
Input process image:
1 byte PII occupies
12 Byte in memory
Output process image:
1 Byte PIO occupies
12 bytes in memory
Example:
256 bytes in PII occupy 3072 bytes,
2047 byte in PIO already occupy 24564 bytes in memory.
Local data
1 local data byte occupies
1 byte in memory
256 byte is default, depending on the priority class. With 14 priority classes
there are therefore 3584 bytes occupied in the working memory. With a
maximum size of 8192 bytes you can still allocate 4608 bytes, which are then
no longer available for the user program in the working memory.
Communication
You can transform the first CPU interface from MPI to DP interface operation. You
can operate the CPU as DP Master or DP Slave on this DP interface. Routing
reduces the maximum possible number of connections for each one of the two
interfaces by one connection per active PG/OP communication used by the CPU
318-2 as network node.
PLC S7-300, CPU Specifications CPU 312 IFM to CPU 318-2 DP
A5E00111190-01
1-69
CPUs
FM 353/354, distributed
If you implement the CPU 318-2 as DP Master, you can operate FM 353 as of
6ES7 353-1AH01-0AE0, firmware version 3.4/03 and FM 354 as of 6ES7
354-1AH01-0AE0, firmware version 3.4/03 in distributed mode with an ET 200M.
You cannot operate the following modules in an S7-300 equipped with a 318-2
CPU
FM 357 up to 6ES7 357-4_H02-3AE_, firmware version 2.1;
FM NC up to 6FC5 250-3AX00-7AH0, firmware version 3.7 + Toolbox 6FC5
252-3AX2Z-6AB0, Software Version 3.6;
SM 338 up to 6ES7 338-7UH00-0AC0, version 07;
SIXWAREX M up to 7MH4 553-1AA41, firmware version 0119;
SINAUT ST7 TIM, 6NH7 800-_A__0 (Tip: Use a TIM module as stand alone node)
Peripheral access in CPU 318-2 is not permitted
for T PAW operations on centrally inserted peripheral modules with corresponding
address bytes assigned to different peripheral modules.
1-70
PLC S7-300, CPU Specifications CPU 312 IFM to CPU 318-2 DP
A5E00111190-01
CPUs
CPU 318-2, Technical Data
CPU and Product Version
MLFB
Data areas and their retentive characteristics
6ES7 318-2AJ00-0AB0
Hardware version
03
Firmware version
V 3.0
Matching programming
package
STEP 7 V 5.1 +
Service Pack 02
Retentive data area as a
whole (inc. flags, timers,
counters)
max. 11 KB
Bit memories
8192
Memory
Work memory
Clock memories
8 (1 memory byte)
Data blocks
2047 (DB 0 reserved)KB
integral
Expandable
256 KB data/
256 KB code
no
Load memory
integral
64 KB
Expandable FEPROM
Up to 4 MB
Expandable RAM
Up to 2 MB
Adjustable retentivity
MB 0 to MB 1023
Preset
MB 0 to MB 15
Size
max. 64 KB
Adjustable retentivity
max. 8 DB, max. 8192 data
bytes
Preset
No retentivity
Local data (alterable)
Backup
max. 8192 bytes
Preset
3584 bytes
Per priority class
256 bytes (expandable to
8192 bytes)
Yes
With battery
All data
Blocks
Without battery
max. 11 KB
OBs
See Instruction List
Processing times
max. 64 KB
Processing times for
Nesting depth
Bit instructions
0.1 s minimum
Word instructions
0.1 s minimum
Double integer
arithmetic
0.1 s minimum
Floating-point
arithmetic
0.6 s minimum
Size
Per priority class
16
additional levels within
an error OB
3
FBs
max. 1024
max. 64 KB
Size
FCs
max. 1024
Timers/Counters and their retentive characteristics
max. 64 KB
S7 counters
512
Address areas (I/O)
Adjustable retentivity
from C 0 to C 511
Preset
from C 0 to C 7
Peripheral address area,
digital/analog
Counting range
0 to 999
Size
max. 8 KB/8 KB (freely
addressable)
Distributed
IEC Counters
Yes
–
MPI/DP Interface
max. 2 KB/2 KB
Type
SFB
–
DP interface
max. 8 KB/8 KB
S7 timers
512
Process image
(configurable)
Adjustable retentivity
from T 0 to T 511
Preset
No retentive times
Timing range
10 ms to 9990 s
IEC Timers
Yes
SFB
Type
Preset
Digital channels
Centralized
2048/2048 bytes
256/256 bytes
max. 65536 (minus 1 byte
diagnostic address per DP
slave)/65536
max. 1024/1024
Analog channels
max. 4096/4096
max. 256/128
PLC S7-300, CPU Specifications CPU 312 IFM to CPU 318-2 DP
A5E00111190-01
Centralized
1-71
CPUs
Configuration
–
Rack
max. 4
Modules per module rack
max. 8
Number of DP masters
integral
2
via CP
2
S7 message functions
Time
Real-time clock
Yes
User data per job
max. 76 bytes
–
76 bytes
S7 communication
Yes (server)
User data per job
max. 160 bytes
–
Byte, Word, Double word
Number of which
consistent
S7-compatible
communication
Yes (via CP and loadable
FC)
User data per job
Dependent on CP
–
Dependent on CP
Yes
Number of which
consistent
Yes
Accuracy
See Section 1.1.6
Standard communication
8
Dependent on CP
–
Dependent on CP
0 to 7
Value range
0 to 32767 hours
Selectivity
1 hour
Interfaces
Retentive
Yes
1. Interface
Yes
Functionality
On PLC
Master/Slave
via MPI
Master/Slave
via DP
Master/Slave
Number of which
consistent
Variable
Inputs, outputs, flags, DBs,
timers, counters
Number
max. 70
Number of connections
Testing and commissioning functions
Status/Modify Variables
Force
Yes
Yes
Variable
Inputs, outputs, flags,
peripheral inputs, peripheral
outputs
Number
max. 256
Monitor block
Yes
Single sequence
Yes
Breakpoint
4
Number of entries
(non-alterable)
PD/OP communication
Yes
Global data communication
Yes
Yes
DP Slave
Yes
Direct data exchange
Yes
Default setting
MPI
Electrically isolated
Yes
Of these, the
following are
reserved:
max. 32;
1 PD connection
1 OP connection
Services
–
PD/OP
communication
Yes
–
Global data
communication
Yes
–
S7 basic
communication
Yes
–
S7 communication
Yes (server)
100
Communication functions
Yes
DP Master
MPI
Diagnostic buffer
MPI
–
Yes (via CP and loadable
FC)
User data per job
Number
Clock synchronisation
Number of which
consistent
Backed-up
Operating hours counter
32 bytes
S7 basic communication
Simultaneously active
Interrupt S function blocks
and
max. 100
Interrupt D function blocks
Number of which
consistent
Transmission rates
Up to 12 Mbps
Number of GD packets
–
Sender
1
–
Receiver
2
Size of GD packets
1-72
54 bytes
PLC S7-300, CPU Specifications CPU 312 IFM to CPU 318-2 DP
A5E00111190-01
CPUs
DP Master
Services
–
DP Slave
Equidistance
–
SYNC/FREEZE
–
Activation/deactivat Yes
ion of DP slaves
Transmission rates
Up to 12 Mbps
Address area
max. 2 KB I/2 KB O
User data per DP slave
max. 244 bytes I and
244 bytes O
Services
–
Status/Modify;
Program; Routing
Device master file
Yes, can be activated
siem807f.gsg
Transmission rate
Up to 12 Mbps
Transfer memory
244 bytes I/244 bytes O
2. Interface
Functionality
DP Master
Yes
DP Slave
Yes
–
Yes, can be activated
Status/Modify;
Program; Routing
Yes
PtP Connection
No
Default setting
None
Galvanically isolated
Yes
–
Of these, the
following are
reserved:
max. 16
1 PD connection
1 OP connection
DP Master
Yes, can be activated
Routing
GSD file
siem807f.gsg
Transmission speed
Up to 12 Mbps
Transfer memory
244 bytes I/244 bytes O
Dimensions
Assembly dimension
BHT (mm)
160125130
Weight
Approx. 0.93 kg
Programming
Programming language
STEP 7
Stored instructions
See Instruction List
Nesting levels
16
System functions (SFCs)
See Instruction List
System function blocks
(SFBs)
See Instruction List
User program security
Password protection
Voltages, Currents
Direct data exchange
Number of connections
Status/Modify;
Program;
Yes
DP Slave
Services
–
Yes
Services
–
PD/OP
communication
Yes
–
Equidistance
Yes
–
SYNC/FREEZE
Yes
–
Activation/deactivat Yes
ion of DP slaves
Power supply
24V DC
20.4 V to 28.8 V
Permissible range
Current consumption (idle)
typical 1.2 A
Inrush current
typical 8A
2
l t
0.4 A2s
External fusing for supply
lines (recommendation)
Circuit breaker; 2 A,
PD supply at MPI (15 to
30V DC)
max. 200 mA
Power losses
typical 12 W
Battery
Yes
Backup margin at 25
C and continuous CPU
buffering
min. 1 year
Battery shelf life at
25C
approx. 5 years
Transmission rates
Up to 12 Mbps
Number of DP slaves
max. 125
Accumulator
Address area
max. 8 KB I/8 KB O
User data per DP slave
max. 244 bytes I and
244 bytes O
PLC S7-300, CPU Specifications CPU 312 IFM to CPU 318-2 DP
A5E00111190-01
Type B or C
Yes
Clock back-up period
–
at 0 to 25C
Approx. 4 weeks
–
at 40 C
Approx. 3 weeks
–
at 60 C
Approx. 1 week
Battery charging time
Approx. 1 hour
1-73
CPUs
1-74
PLC S7-300, CPU Specifications CPU 312 IFM to CPU 318-2 DP
A5E00111190-01
CPU 31x-2 as DP Master/DP Slave and
Direct Communication
2
Introduction
In this chapter you will find the features and technical specifications of the CPUs
315-2 DP, 316-2DP and 318-2. You will need these in order to use the CPU as a
DP master or a DP slave and configure it for direct communication.
Agreement: Since DP Master/Slave behavior is the same for all CPUs, the CPUs
described below are referred to as CPU 31x-2.
Note on CPU 318-2: With a CPU 318-2 you can operate the MPI-/DP interface as
DP interface. In this case, however, you can only configure it as DP Master and
not as DP Slave.
In This Chapter
Section
Contents
Page
2.1
Information on DPV1 Functionality
2-2
2.2
DP Address Areas of the CPUs 31x-2
2-4
2.3
CPU 31x-2 as DP Master
2-5
2.4
Diagnostics of the CPU 31x-2 as DP Master
2-6
2.5
CPU 31x-2 as DP Slave
2-13
2.6
Diagnostics of the CPU 31x-2 as DP Slave
2-18
2.7
Direct data exchange
2-32
2.8
Diagnosis with Direct Communication
2-33
Additional Literature
Descriptions and notes on system configuration, configuration of a PROFIBUS
subnet and on diagnostics in a PROFIBUS subnet is found in the STEP 7 Online
Help.
PLC S7-300, CPU Specifications CPU 312 IFM to CPU 318-2 DP
A5E00111190-01
2-1
CPU 31x-2 as DP Master/DP Slave and Direct Communication
2.1
Information on DPV1 Functionality
The aim
The EN50170 Standard for Distributed Peripherals was subject to further
development. All changes were incorporated in IEC 61158 / EN 50170,
Volume 2, PROFIBUS. In order to simplify matters we now refer to DPV1
Mode.
How do I identify a DPV1 Master/Slave?
DP Master CPUs of the S7-400 family and the CPU 318-2, respectively with
integrated DP interface, support DPV1 Master functionality as of Firmware Version
3.0.0.
DP Slaves, listed in the STEP 7 hardware catalog under their family name can be
identified as DPV1 Slaves with the help of the info text. DP Slaves implemented in
STEP 7 via GSD files support V1 functionality as of GSD Revision 3.
As of which STEP 7 version is migration to DPV1 mode possible?
As of STEP 7 V5.1, Servicepack 2.
Which operating modes are available for DPV1 modules?
You are using a DPV1 automation module, but do not want to migrate to DPV1
mode. In this case you use S7 compatible mode. In this mode, the automation
module is compatible to EN50170. In this case, however, you cannot utilize full
DPV1 functionality. You could, for example, use the new SFBs 52...54. However,
default values are written to non-existing data.
You are using a DPV1 compatible automation module and want to migrate to DPV1
mode. In this case, use DPV1 mode for full functionality. In your station you can
continue using automation modules not supporting DPV1 as usual.
Can I use all previous slaves after migration to DPV1 mode?
Yes, without restriction. The only difference here is that your previous slaves do not
support extended DPV1 functions.
2-2
PLC S7-300, CPU Specifications CPU 312 IFM to CPU 318-2 DP
A5E00111190-01
CPU 31x-2 as DP Master/DP Slave and Direct Communication
Can I use DPV1 Slaves without this migration?
Yes, without restriction. In this case, DPV1 Slaves behave as conventional Slaves.
SIEMENS DPV1 Slaves can also be operated in S7 compatible mode. For DPV1
Slaves of other manufacturers you require a GSD file to EN50170 below Revision
3. DPV1 – station-wide.
You must convert the complete station to DPV1 mode if you migrate to DPV1. In
STEP 7 you can configure this mode in the HW Config module (DP Mode).
Details on migration to DPV1 mode are found in our Customer Support
under FAQ topic ID: 7027576
PLC S7-300, CPU Specifications CPU 312 IFM to CPU 318-2 DP
A5E00111190-01
2-3
CPU 31x-2 as DP Master/DP Slave and Direct Communication
2.2
DP Address Areas of the CPUs 31x-2
Address areas of CPUs 31x-2
Address area
315-2 DP
316-2DP
318-2
DP address area
for I/Os
1024 bytes
2048 bytes
8192 bytes
of these in the I/O
process images
Bytes 0 to 127
Bytes 0 to 127
Bytes 0 to 255
(default)
Can be set up to
byte 2047
In the input address area, DP diagnostic addresses occupy 1 byte for the DP
master and for each DP slave. Under these addresses, for example, you can call
DP standard diagnostics for the respective nodes (LADDR parameter of SFC13).
The DP diagnostic addresses are specified during configuration. If you do not
specify any DP diagnostic addresses, STEP 7 assigns these addresses, in
decrements starting at the highest byte.
Configuring modules with addresses assigned to the peripheral area
Always configure a module address in a peripheral area either completely inside or
completely outside of the process image. Otherwise, consistency is not ensured
and corrupted data might be generated.
2-4
PLC S7-300, CPU Specifications CPU 312 IFM to CPU 318-2 DP
A5E00111190-01
CPU 31x-2 as DP Master/DP Slave and Direct Communication
2.3
CPU 31x-2 as DP Master
Introduction
This section covers the features and technical specifications of the CPU when it is
used as a DP master.
The features and technical specifications of the CPU 31x-2 as the “standard” CPU
are listed in Section 1.
Prerequisite
Should the MPI/DP interface be a DP interface? If so, you must then configure the
interface as a DP interface.
Before the CPU can be put into operation, it must be configured as a DP master.
This means carrying out the following steps in STEP 7 :
Configure the CPU as a DP master.
Assign a PROFIBUS address.
Assign a master diagnostic address.
Integrate DP slaves into the DP master system.
Is a DP slave a CPU 31x-2?
If so, you will find that DP slave in the PROFIBUS-DP catalog as
“pre-configured station”. This DP slave CPU must be assigned a slave
diagnostic address in the DP master. Interconnect the DP master and the DP
slave CPU. Specify the address areas for data exchange with the DP slave
CPU.
Status/Control, Programming via PROFIBUS
As an alternative to the MPI interface, you can program the CPU via
PROFIBUS-DP interface or execute the PG’s status and control functions.
Note
The use of Monitor and Modify via the PROFIBUS-DP interface lengthens the DP
cycle.
Equidistance
As of STEP 7 V 5.x you can configure bus cycles of the same length (equidistant)
for PROFIBUS subnets. You can find a detailed description of equidistance in the
STEP 7 online help system.
PLC S7-300, CPU Specifications CPU 312 IFM to CPU 318-2 DP
A5E00111190-01
2-5
CPU 31x-2 as DP Master/DP Slave and Direct Communication
Power-Up of the DP Master System
CPU 31x-2DP is DP Master
CPU 318-2 is DP Master
You can also set power-up time monitoring
of the DP slaves with the
“Transfer of parameters to modules”
parameter.
Using the parameters
“Transfer of parameters to modules” and
“Ready message from modules” you can
set power-up time monitoring for the DP
slaves.
This means that the DP slaves must be powered up and configured by the CPU (as DP
master) in the set time.
PROFIBUS Address of the DP Master
You cannot set the 126 as the PROFIBUS address for the CPU 31x-2.
2.4
Diagnostics of the CPU 31x-2 as DP Master
Diagnosis with LEDs
Table 2-1 describes the meaning of the BUSF LED.
For display the BUSF LED assigned to the PROFIBUS-DP interface is always it or
it flashes.
Table 2-1
BUSF
LED off
Meaning of the BUSF LED of the CPU 31x-2 as DP Master
Description
Remedy
Configuring data OK;
–
all configured slaves are addressable.
LED on
Bus fault (hardware fault).
DP interface fault.
Different transmission rates in
Check for bus cable breaks or short-circuit.
Evaluate the diagnostic data. Reconfigure or
correct the configuring data.
multiple DP master mode.
LED
flashes
Station failure.
Check the bus cable connection to the
At least one of the configured slaves
cannot be addressed.
CPU31x-312, or check whether the bus is
interrupted.
Wait until the CPU 31x-2 has powered up. If the
LED does not stop flashing, check the DP
slaves or evaluate the diagnostic data for the
DP slaves.
2-6
PLC S7-300, CPU Specifications CPU 312 IFM to CPU 318-2 DP
A5E00111190-01
CPU 31x-2 as DP Master/DP Slave and Direct Communication
Reading Diagnostic Data with STEP 7
Table 2-2
Reading Diagnostic Data with STEP 7
DP Master
CPU 31x-2
Modules or
registers in
STEP 7
Application
See...
”DP slave
diagnostics”
tab
Display slave diagnostic data
as plain text on the STEP 7
user interface
See “Diagnosis of Hardware” in
the STEP 7 Online Help and
STEP 7 User Manual
SFC 13
“DPNRM_DG”
Reading out slave diagnosis
(store in the data area of the
user program)
Configuration for the CPU 31x-2,
see Section 2.6.4; SFC, see
System and Standard Functions
Reference Manual
Configuration for other slaves,
see their description
SFC 59
“RD_REC”
Read out data records of the S7
diagnosis (store in the data
area of the user program)
SFC 51
“RDSYSST”
Read out system state sub-lists.
In the diagnostics interrupt with
the SSL ID W#16#00B4, call
SFC51 and read out the SSL
(system diagnostic list) of the
slave CPU.
SFB 52
“RDREC”
(only 318-2)
Applicable to DPV1
environment:
SFB 54
“RALRM”
(only 318-2)
Applicable to DPV1
environment:
System and Standard Functions
Reference Manual
Read out data records of the S7
diagnosis (store in the data
area of the user program)
Read out interrupt information
within the corresponding
interrupt OB
Evaluating Diagnostics in the User Program
The following figures show you how to evaluate the diagnosis in the user program.
Note the order number for the CPU 315-2DP:
CPU 315-2DP < 6ES7 315-2AF03-0AB0
CPU 315-2DP as of 6ES7315-2AF03-0AB0
CPU 316-2DP as of 6ES7316-2AG00-0AB0
CPU 316-2 as of 6ES7318-2AJ00-0AB0
...see Figure 2-1 on page 2-8
...see Figure 2-2 on page 2-9
PLC S7-300, CPU Specifications CPU 312 IFM to CPU 318-2 DP
A5E00111190-01
2-7
CPU 31x-2 as DP Master/DP Slave and Direct Communication
CPU 315-2DP smaller than 6ES7 315-2AF03-0AB0
Diagnostic event
OB82 is called
Read out the parameter OB 82_MDL_TYPE
in the local data of OB 82:
The module class is in the bits 0 to 3 (DP
slave type)
0011 =
DP slave according to
the standard
1011 =
CPU as DP slave (I slave)
Read out
OB82_MDL_ADDR
Read out
OB82_MDL_ADDR
(Diagnostic address of the
DP slave = STEP 7
diagnostic address)
(Diagnostic address of the
DP slave = STEP 7
diagnostic address)
Enter the diagnostic
address in the LADDR
parameter
Enter the diagnostic
address in the LADDR
parameter
Call SFC 51
2-8
For the diagnosis of the
modules involved:
Call SFC 51
Enter the diagnostic
address in the INDEX
parameter (always the
input address here)
Enter the ID W#16#00B3
in the SZL_ID parameter
(=diagnostic data of a
module)
Figure 2-1
Read
out OB82_MDL_ADDR
and
Read out OB82_IO_FLAG
(= identifier I/O module)
Enter bit 0 of OB82_IO_Flag as bit
15 in OB82_MDL_ADDR
Result: Diagnostics address
”OB82_MDL_ADDR*”
Call SFC 13
Call SFC 13
Other ID:
S7-DP Slave
Enter the diagnostic address
“OB82_MDL_ADDR*” in the
INDEX parameter
Enter the ID W#16#00B3 in
the SZL_ID parameter
(=diagnostic data of a
module)
Diagnostics with CPU 315-2DP < 315-2AF03
PLC S7-300, CPU Specifications CPU 312 IFM to CPU 318-2 DP
A5E00111190-01
CPU 31x-2 as DP Master/DP Slave and Direct Communication
CPU 315-2DP as of 6ES7 315-2AF03-0AB0
CPU 3162DP;
Diagnostic event
318-2
OB82 is called
only 318-2
Read out OB82_MDL_ADDR
and
For the diagnostics of the
respective modules:
Read out OB82_IO_FLAG
(= identifier I/O module)
call SFB 54 (in DPV1 mode)
Set MODE = 1
Diagnostic data is written to
Enter bit 0 of OB82_IO_Flag as bit
15 in OB82_MDL_ADDR
Result: Diagnostics address
”OB82_MDL_ADDR*”
the parameters TINFO and
AINFO.
For diagnosis of the whole DP slave:
For the diagnosis of the modules involved:
Call SFC 13
Call SFC 51
Enter the diagnostic address
“OB82_MDL_ADDR*” in the LADDR
parameter
Figure 2-2
Enter the diagnostic address
“OB82_MDL_ADDR*” in the INDEX parameter
Enter the ID W#16#00B3 in the SZL_ID parameter
(=diagnostic data of a module)
Diagnostics with CPU 31x-2 (315-2DP as of 315-2AF03)
PLC S7-300, CPU Specifications CPU 312 IFM to CPU 318-2 DP
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CPU 31x-2 as DP Master/DP Slave and Direct Communication
Diagnostic Addresses
With a CPU 31x-2, you assign the diagnostic addresses for the PROFIBUS-DP.
Make sure during configuration that DP diagnostic addresses are assigned to both
the DP master and the DP slave.
CPU 31x-2 as DP Master
CPU 31x-2 as DP Slave
PROFIBUS
During configuration you must specify two diagnostic
addresses:
Diagnostic
address
When you configure the DP master, you
must specify (in the associated project of
the DP master) a diagnostic address for
the DP slave. In the following, this
diagnostic address is referred to as
allocated to the DP master.
The DP master receives information on
the status of the DP slave or on a bus
interruption via this diagnostic address
(see also Table 2-3).
Figure 2-3
2-10
Diagnostic
address
When you configure the DP slave, you
must also specify (in the associated
project of the DP slave) a diagnostic
address that is allocated to the DP slave.
In the following, this diagnostic address
is referred to as allocated to the DP
slave.
The DP slave receives information on
the status of the DP master or on a bus
interruption via this diagnostic address
(see also Table 2-8 on page 2-23).
Diagnostic Addresses for DP Master and DP Slave
PLC S7-300, CPU Specifications CPU 312 IFM to CPU 318-2 DP
A5E00111190-01
CPU 31x-2 as DP Master/DP Slave and Direct Communication
Event Detection
Table 2-3 shows how a DP Master CPU 31x-2 recognizes operating state
transitions of a DP Slave CPU or or data transfer interrupts.
Table 2-3
Event Detection of the CPU 31x-2 as DP Master
Event
Bus interruption
(short-circuit, plug
disconnected)
What Happens in the DP Master
OB 86 is called and a station failure reported
(incoming event;
Diagnostic address of the DP slave, assigned to the DP
master)
on peripheral access: Call of OB 122
(Peripheral access error)
DP Slave
RUN → STOP
OB 82 is called and Module fault reported
DP Slave
STOP → RUN
Call of OB82 with the message Module OK.
(incoming event;
Diagnostic address of the DP slave assigned to the DP
master;
Variable OB82_MDL_STOP=1)
(outgoing event;
Diagnostic address of the DP slave assigned to the DP
master;
Variable OB82_MDL_STOP=0)
PLC S7-300, CPU Specifications CPU 312 IFM to CPU 318-2 DP
A5E00111190-01
2-11
CPU 31x-2 as DP Master/DP Slave and Direct Communication
Evaluation in the User Program
Table 2-4 shows you how you can, for example, evaluate RUN-STOP transitions of
the DP slave in the DP master (see Table 2-3).
Table 2-4
Evaluating RUN-STOP Transitions of the DP Slaves in the DP Master
In the DP Master
In the DP Slave (CPU 31x-2DP)
Diagnostic Addresses Example:
Master diagnostic address =1023
Slave diagnostic address in the master
system =1022
Diagnostic Addresses Example:
Slave diagnostic address =422
Master diagnostic address = not relevant
The CPU calls OB 82 with the following
information:
CPU: RUN → STOP
OB 82_MDL_ADDR:=1022
OB82_EV_CLASS:=B#16#39
CPU generates a DP slave diagnostic frame
(see Section 2.6.4).
(incoming event)
OB82_MDL_DEFECT:=Module fault
Tip: The CPU’s diagnostic data buffer also
contains this information
In your user program, you should also
program SFC13 “DPNRM_DG” to fetch
diagnostic data from the DP Slave.
We recommend you use SFB54 when
operating in DPV1 mode. It outputs complete
interrupt information.
2-12
PLC S7-300, CPU Specifications CPU 312 IFM to CPU 318-2 DP
A5E00111190-01
CPU 31x-2 as DP Master/DP Slave and Direct Communication
2.5
CPU 31x-2 as DP-Slave
Introduction
This section lists the characteristics and technical specifications for the CPU when
it is operated as a DP slave.
The characteristics and technical specifications of the CPU as the “standard” CPU
can be found in Section 1.
Prerequisite
Should the MPI/DP interface be a DP interface? If so, you must then configure the
interface as a DP interface.
Prior to startup, the CPU must be configured as a DP slave. This means carrying
out the following steps in STEP 7:
“Switch on” the CPU as DP slave.
Assign a PROFIBUS address.
Assign a slave diagnostic address.
Specify the address areas for data exchange with the DP Master.
Device Master Files
You need a device master file to configure the CPU 31x-2 as a DP slave in a DP
master system.
COM PROFIBUS as of V 4.0 includes the GSD file.
If you are working with an older version or another configuration tool, you can get
the device master file from the following sources:
On the Internet at http://www.ad.siemens.de/csi_e/gsd
or
Via modem from the SSC (Interface Center) Fuerth by calling 0911/911/737972.
Configuration and parameter assignment message frame
STEP 7 provides support for the configuration and parameter assignment of 31x-2
CPUs. If you require a description of the configuration and parameter assignment
message frame, for example, to carry out a check using a bus monitor, refer to the
Internet URL http://www.ad.siemens.de/simatic-cs, article ID 1452338.
PLC S7-300, CPU Specifications CPU 312 IFM to CPU 318-2 DP
A5E00111190-01
2-13
CPU 31x-2 as DP Master/DP Slave and Direct Communication
Status/Control, Programming via PROFIBUS
As an alternative to the MPI interface, you can program the CPU via
PROFIBUS-DP interface or execute the PG’s Status and Control functions . To do
so, you must enable these functions when configuring the CPU as a DP slave in
STEP 7.
Note
The use of Monitor and Modify via the PROFIBUS-DP interface lengthens the DP
cycle.
Data Transfer Via Transfer Memory
The CPU 31x-2 operating as DP Slave provides a transfer memory for
PROFIBUS DP. The data transfer between the CPU as DP slave and the DP
master always takes place via this intermediate memory. Here you can configure
up to 32 address areas.
That is, the DP Master writes its data to the address areas of the transfer memory
while the CPU’s user program fetches these data and vie versa.
DP master
CPU 31x-2 as DP Slave
Transfer memory
in the Peripheral
Address Area
I/O
I/O
PROFIBUS
Figure 2-4
2-14
Transfer Memory in a CPU 31x-2 operating as DP Slave
PLC S7-300, CPU Specifications CPU 312 IFM to CPU 318-2 DP
A5E00111190-01
CPU 31x-2 as DP Master/DP Slave and Direct Communication
Address areas of the transfer memory
Configure the I/O address areas in STEP 7:
you can configure up to 32 I/O address areas
the maximum length of each one of these address areas is 32 bytes
You can configure a maximum of 244 bytes for inputs and 244 bytes for
outputs.
The table below shows the principle of address areas. You can also find this figure
in the STEP 7 configuration.
Table 2-5
Example of an address area configuration for transfer memory
Typ
e
Master
Address
Typ
e
Slave
Address
Lengt
h
Unit
Consistenc
y
1
E
222
A
310
2
Byte
Unit
2
A
0
E
13
10
Word
Total length
:
32
Address areas in the
DP Master CPU
Address areas in the
DP Slave CPU
These address area parameters
must be the same for both the DP
Master and DP Slave
Rules
The following rules must be followed when using the intermediate memory:
Address area assignment:
– Input data of the DP slave are always output data of the DP master
– Output data of the DP slave are always input data of the DP master
The addresses can be freely allocated. In the user program, access the data
with Load/Transfer statements or with SFCs 14 and 15. You can also specify
addresses from the I/O process images.
Note
Transfer memory addresses are assigned from the DP address area of the CPU
31x-2.
Do not assign transfer memory addresses to the I/O modules in the CPU 31x-2!
The lowest address represents the start address of the respective address
area.
Length, unit and consistency of DP Master/Slave address areas related to each
other must be identical.
PLC S7-300, CPU Specifications CPU 312 IFM to CPU 318-2 DP
A5E00111190-01
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CPU 31x-2 as DP Master/DP Slave and Direct Communication
S5 DP Master
If you are using an IM 308 C as a DP master and the CPU 31x-2 as a DP slave,
the exchange of consistent data requires the following:
In the IM 308 C, you must program FB 192 to enable the exchange of consistent
data between DP master and DP slave. FB192 outputs/fetches all CPU 31x-2 data
in a single block!
S5-95 as a DP master
If you are using an AG S5-95 as a DP master, you must also set its bus
parameters for the CPU 31x-2 as a DP slave.
2-16
PLC S7-300, CPU Specifications CPU 312 IFM to CPU 318-2 DP
A5E00111190-01
CPU 31x-2 as DP Master/DP Slave and Direct Communication
Sample Program
Below you will see a small sample program for the exchange of data between DP
master and DP slave. The addresses used in the example are those from Table
2-5.
In the DP Slave CPU
L
T
L
T
2
MB
EB
MB
6
0
7
L
T
MW
PAW
6
310
In the DP Master CPU
Data
pre-processing
in DP slave
Forward data to
DP master
L
T
L
L
+
T
PEB
MB
PEB
B#16#3
I
MB
L
+
T
10
3
MB
222
50
223
51
Data Processing
in DP master
60
CALL
SFC
15
LADDR:= W#16#0
RECORD:= P#M60.0 Byte
20
RET_VAL:= 22 MW
CALL
SFC
14
LADDR:=W#16#D
RET_VAL:=MW 20
RECORD:=P#M30.0 Byte 20
Receive data
from DP master
L
L
+
T
Further
processing of
received data
MB
MB
I
MW
30
7
Further
processing of
received data in
the DP master
Send data to DP
slave
100
Data Transfer in STOP Mode
The DP-Slave CPU goes into STOP: Data in the CPU’s transfer memory are
overwritten with “0”, that is, the DP Master reads “0”.
The DP Master goes into STOP: Current data in the CPU’s transfer memory are
retained and can still be fetched by the CPU.
PROFIBUS address
You cannot set the 126 as the PROFIBUS address for the CPU 31x-2.
PLC S7-300, CPU Specifications CPU 312 IFM to CPU 318-2 DP
A5E00111190-01
2-17
CPU 31x-2 as DP Master/DP Slave and Direct Communication
2.6
Diagnosis of the CPU 31x-2 operating as DP-Slave
In This Section
Section
2-18
Contents
Page
2.6.1
Diagnosis with LEDs
2-19
2.6.2
Diagnostics with STEP 5 or STEP 7
2-19
2.6.3
Reading Out the Diagnostic Data
2-20
2.6.4
Format of the Slave Diagnostic Data
2-24
2.6.5
Station Status 1 to 3
2-25
2.6.6
Master PROFIBUS Address
2-27
2.6.7
Manufacturer Identification
2-27
2.6.8
Module Diagnostics
2-28
2.6.9
Station Diagnostics
2-29
2.6.10
Interrupts
2-31
PLC S7-300, CPU Specifications CPU 312 IFM to CPU 318-2 DP
A5E00111190-01
CPU 31x-2 as DP Master/DP Slave and Direct Communication
2.6.1
Diagnosis with LEDs
Diagnostics with LED displays - CPU 31x-2
Table 2-6 explains the meaning of the BUSF LEDs.
The BUSF LED assigned to the interface configured as the PROFIBUS-DP
interface will always come on or flash.
Table 2-6
Meaning of the BUSF LEDs in the CPU 31x-2 as DP Slave
Description
BUSF
Remedy
LED off
Configuring OK.
–
LED
flashes
The CPU 31x-2 is incorrectly configured.
There is no data interchange between
the DP master and the CPU 31x-2.
Check the CPU 31x-2.
Check whether the bus connector is plugged in
Reasons:
Check for interruptions in the bus cable to the
Timeout.
Bus communication via PROFIBUS
properly.
DP master.
Check configuring data and parameters.
interrupted.
LED on
2.6.2
Incorrect PROFIBUS address.
Bus short-circuit
Check the bus configuration.
Diagnostics with STEP 5 or STEP 7
Slave Diagnosis
The slave diagnosis complies with EN 50170, Volume 2, PROFIBUS. Depending
on the DP master, the diagnosis can be read for all DP slaves that comply with the
standard, using 5 STEP5 or 7 STEP 7.
The following sections describe how the slave diagnosis is read and structured.
PLC S7-300, CPU Specifications CPU 312 IFM to CPU 318-2 DP
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CPU 31x-2 as DP Master/DP Slave and Direct Communication
S7 Diagnosis
An S7 diagnosis can be requested for all the modules in the SIMATIC S7/M7 range
of modules in the user program. The structure of the S7 diagnostic data is the
same for both central and distributed modules.
The diagnostic data of a module is in data records 0 and 1 of the system data area
of the module. Data record 0 contains 4 bytes of diagnostic data describing the
current state of a module. Data record 1 also contains module-specific diagnostic
data.
You can find out how to configure the diagnostic data in the System and Standard
Functions Reference Manual.
2.6.3
Table 2-7
Reading Out the Diagnostic Data
Fetching diagnostic data with STEP 5 and STEP 7 in the master system
Programmable
Controller with DP
Master
SIMATIC S7/M7
Modules or
registers in
STEP 7
“DP Slave
Diagnostics”
tab
2-20
See...
Display slave diagnostic data as
plain text on the STEP 7 user
interface
See “Diagnosis of
Hardware” in the STEP 7
Online Help and STEP 7
User Manual
SFC 13
“DP NRM_DG”
Reading out slave diagnosis
(store in the data area of the user
program)
See Section 2.6.4; SFC: see
System and Standard
Functions Reference
Manual
SFC 51
“RDSYSST”
Read out system state sublists.
In the diagnostics interrupt with
the SSL ID W#16#00B4, call
SFC51 and read out the SSL
(system diagnostic list) of the
Slave CPU.
Applicable to DPV1 environment:
System and Standard
Functions Reference
Manual
SFB 54
“RDREC”
(only 318-2)
SIMATIC S5 with
IM 308-C operating
as DP Master
SIMATIC S5 with
S5-95U PLC
operating as DP
Master
Application
FB 192
“IM308C”
FB 230
“S_DIAG”
Read out interrupt information
within the corresponding interrupt
OB
Reading out slave diagnosis
(store in the data area of the user
program)
System and Standard
Functions
Reference Manual
See Section 2.6.4; for FBs
refer to the Distributed I/O
System ET200 Manual
200
PLC S7-300, CPU Specifications CPU 312 IFM to CPU 318-2 DP
A5E00111190-01
CPU 31x-2 as DP Master/DP Slave and Direct Communication
Example of fetching Slave diagnostic data with FB192 “IM 308C”
Here you will find an example of how to use FB192 to fetch slave diagnostic data
of a DP slave in the 192 STEP 5 user program.
Assumptions
The following assumptions are made for this STEP 5 user program:
IM 308-C, operating as DP Master, occupies frames 0 ... 15 (number 0 of
IM 308-C).
The DP Slave has the PROFIBUS address 3.3
The slave diagnostic data should be written to DB20. You can also use any
data block for this.
The slave diagnosis consists of 26 bytes.
STEP 5 Use Program
STL
Name
DPAD
IMST
FCT
GCGR
TYPE
STAD
LENG
ERR
Description
:A
DB
:SPA
FB
:IM308C
:
KH
:
KY
:
KC
:
KM
:
KY
:
KF
:
KF
:
DW
30
192
F800
0, 3
SD
0
0, 20
+1
26
0
Default address area of IM 308-C
IM no. = 0, PROFIBUS address of the DP slave = 3
Function: Read Slave diagnostic data
Not evaluated
S5 Data area: DB 20
Diagnostic data, starting at Data Word 1
Length of diagnostic data = 26 bytes
Error code area in DW 0 of DB30
Example of reading out S7 diagnostic data with SFC59 “RD_REC”
Here you will find an example of how to use SFC59 to fetch S7 diagnostic data
records for a DP Slave in the STEP 7 user program. Reading out the slave
diagnostic data with SFC13 is similar.
Assumptions
The following assumptions are made for this STEP 7 user program:
The diagnosis for the input module with the address 200H is to be read.
Data record 1 is to be read out.
Data record 1 is to be stored in DB 10.
PLC S7-300, CPU Specifications CPU 312 IFM to CPU 318-2 DP
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2-21
CPU 31x-2 as DP Master/DP Slave and Direct Communication
STEP 7 User Program
STL
Description
CALL SFC 59
REQ
IOID
LADDR
RECNUM
RET_VAL
BUSY
RECORD
:=TRUE
:=B#16#54
:=W#16#200
:=B#16#1
:=
:=TRUE
:=DB 10
Request to Read
Identifier of the Address Area, here the I/O input
Logical address of the module
Data record 1 is to be read out
Errors result in the output of an error code
Reading process is not finished
Destination area for the read data record 1 is data
block 10
Diagnostic Addresses
With a CPU 31x-2, you assign the diagnostic addresses for the PROFIBUS-DP.
Make sure during configuration that DP diagnostic addresses are assigned to both
the DP master and the DP slave.
CPU 31x-2 as DP Master
CPU 31x-2 as DP Slave
PROFIBUS
During configuration you must specify two diagnostic
addresses:
Diagnostic address
When you configure the DP master, you
must specify (in the associated project of
the DP master) a diagnostic address for
the DP slave. In the following, this
diagnostic address is referred to as
allocated to the DP master.
When you configure the DP slave, you
must also specify (in the associated
project of the DP slave) a diagnostic
address that is allocated to the DP slave.
In the following, this diagnostic address
is referred to as allocated to the DP
slave.
The DP master receives information on
the status of the DP slave or on a bus
interruption via this diagnostic address
(see also Table 2-3 on page 2-11).
The DP slave receives information on
the status of the DP master or on a bus
interruption via this diagnostic address
(see also Table 2-8).
Figure 2-5
2-22
Diagnostic address
Diagnostic Addresses for DP Master and DP Slave
PLC S7-300, CPU Specifications CPU 312 IFM to CPU 318-2 DP
A5E00111190-01
CPU 31x-2 as DP Master/DP Slave and Direct Communication
Event Detection
Table 2-8 shows how a DP Master CPU 31x-2 recognizes operating state
transitions of a DP Slave CPU or or data transfer interrupts.
Table 2-8
Event Detection of the CPU 31x-2 as DP Slave
What Happens in the DP Slave
Event
Bus interruption
(short-circuit, plug
disconnected)
OB 86 is called and a station failure reported
(incoming event; diagnostic address of the DP slave assigned
to the DP slave)
on peripheral access: Call of OB 122
(Peripheral access error)
DP Master:
RUN → STOP
OB 82 is called and Module fault reported
DP Master:
STOP → RUN
Call of OB82 with the message Module OK.
(incoming event;
diagnostic address of the DP slave assigned to the DP slave)
Variable OB82_MDL_STOP=1)
(outgoing event;
diagnostic address of the DP slave assigned to the DP slave)
Variable OB82_MDL_STOP=0)
Evaluation in the User Program
Table 2-9 shows you how you can, for example, evaluate RUN-STOP transitions of
the DP master in the DP slave (see Table 2-8).
Table 2-9
Evaluating RUN-STOP Transitions in the DP Master/DP Slave
In the DP Master
In the DP Slave
Diagnostic Addresses Example:
Master diagnostic address =1023
Slave diagnostic address in the master
system =1022
Diagnostic Addresses Example:
Slave diagnostic address =422
Master diagnostic address = not relevant
CPU: RUN → STOP
The CPU calls OB 82 with the following
information:
OB 82_MDL_ADDR:=422
OB82_EV_CLASS:=B#16#39
(incoming event)
OB82_MDL_DEFECT:=Module fault
Tip: The CPU’s diagnostic data buffer also
contains this information
PLC S7-300, CPU Specifications CPU 312 IFM to CPU 318-2 DP
A5E00111190-01
2-23
CPU 31x-2 as DP Master/DP Slave and Direct Communication
2.6.4
Format of the Slave Diagnostic Data
Structure of Slave Diagnostics
Byte 0
Byte 1
Byte 2
Station Status 1 to 3
Byte 3
Master PROFIBUS Address
Byte 4
Byte 5
High byte
Byte 6
to
Byte x
Byte x+1
to
Byte y
Low byte
Manufacturer
Identification
.
.
.
Module Diagnostics
(the length depends on the
number of address areas
configured for transfer memory 1)
.
.
.
Station Diagnostics
(the length depends on the
number of address areas
configured for transfer memory)
1
Exception: If the DP master is incorrectly configured, the DP slave
interprets 35 configured address areas (46H).
Figure 2-6
2-24
Format of the Slave Diagnostic Data
PLC S7-300, CPU Specifications CPU 312 IFM to CPU 318-2 DP
A5E00111190-01
CPU 31x-2 as DP Master/DP Slave and Direct Communication
2.6.5
Station Status 1 to 3
Definition
Station status 1 to 3 provides an overview of the status of a DP slave.
Station Status 1
Table 2-10 Structure of Station Status 1 (Byte 0)
Bit
0
Description
1: DP slave cannot be addressed by
DP master.
Remedy
Is the correct DP address set on the DP
slave?
Bus connector plugged in?
Does the DP slave have power?
RS 485 Repeater setting OK?
Execute a Reset on the DP slave.
1
1: DP slave is not ready for data
interchange.
Wait; the DP slave is still doing its run-up.
2
1: The configuration data which the
DP master sent to the DP slave do
not correspond with the DP slave’s
actual configuration.
Was the software set for the right station
1: Diagnostic interrupt, generated by a
RUN/STOP transition on the CPU
You can read out the diagnostic data.
3
type or the right DP slave configuration?
0: Diagnostic interrupt, generated by a
STOP/RUN transition on the CPU
4
1: Function is not supported, for
instance changing the DP address
at the software level.
Check the configuring data.
5
0: This bit is always “0”.
-
6
1: DP slave type does not correspond
to the software configuration.
Was the software set for the right station
1: DP slave was configured by a
different DP master to the one that
currently has access to it.
Bit is always “1” when, for instance, you are
7
type? (parameter assignment error)
currently accessing the DP slave via the PG
or a different DP master.
The DP address of the master that
configured the slave is located in the
“Master PROFIBUS address” diagnostic
byte.
PLC S7-300, CPU Specifications CPU 312 IFM to CPU 318-2 DP
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CPU 31x-2 as DP Master/DP Slave and Direct Communication
Station Status 2
Table 2-11 Structure of Station Status 2 (Byte 1)
Bit
Meaning
0
1: New parameter assignment and configuration of the DP Slave is
required.
1
1: A diagnostic message has arrived. The DP slave cannot continue
operation until the error has been rectified (static diagnostic message).
2
1: This bit is always “1” when there is a DP slave with this DP address.
3
1: The watchdog monitor has been activated for this DP slave.
4
0: This bit is always “0”.
5
0: This bit is always “0”.
6
0: This bit is always “0”.
7
1: DP slave is deactivated, that is to say, it has been removed from the
scan cycle.
Station Status 3
Table 2-12 Structure of Station Status 3 (Byte 2)
Bit
Description
0
to
6
0: These bits are always “0”.
7
1: More diagnostic messages have arrived than the DP slave can
buffer.
The DP master cannot enter all the diagnostic messages sent by the
DP slave in its diagnostic buffer.
2-26
PLC S7-300, CPU Specifications CPU 312 IFM to CPU 318-2 DP
A5E00111190-01
CPU 31x-2 as DP Master/DP Slave and Direct Communication
2.6.6
Master PROFIBUS Address
Definition
The DP address of the DP Master is written to the diagnostic byte Master
PROFIBUS address:
The master that has configured the DP slave
The master that has read and write access to the DP slave
Master PROFIBUS Address
Table 2-13 Structure of the Master PROFIBUS Address (Byte 3)
Bit
0 to 7
Description
DP address of the DP master that configured the DP slave and has
read/write access to that DP slave.
FFH: DP slave was not configured by a DP master.
2.6.7
Manufacturer ID
Definition
The manufacturer identification contains a code specifying the DP slave’s type.
Manufacturer Identification
Table 2-14 Structure of the Manufacturer Identification (Bytes 4 and 5)
Byte 4
Byte 5
Manufacturer Identification for
80H
2FH
CPU 315-2 DP
80H
6FH
CPU 316-2 DP
80H
7FH
CPU 318-2
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2-27
CPU 31x-2 as DP Master/DP Slave and Direct Communication
2.6.8
Module Diagnostics
Definition
ID related diagnostics specifies in which one of the configured address areas of
transient memory an entry was made.
Byte 6
7
0 1
0 Bit No.
Length of ID-related diagnostic data
incl. byte 6 (up to 6 bytes, depending on the number of configured
address areas)
Code for module diagnosis
7 6 5 4 3
1
Bit No.
Byte 7
Default and actual configuration
Default and actual config. Slave CPU in STOP
Default and actual configuration
Entry for the 1st configured address area
Entry for the 2nd configured address area
Entry for the 3rd configured address area
Entry for the 4th configured address area
Entry for the 5th configured address area
7 6 5 4 3 2 1 0
Bit No.
Byte 8
Entry for the 6th to 13th configured address area
7 6 5 4 3 2 1 0
Bit No.
Byte 9
Entry for the 14th to 21st configured address area
7 6 5 4 3 2 1 0 Bit No.
Byte 10
Entry for the 22nd to 29th configured address area
Byte 11
7 6 5 4 3 2 1 0
0 0 0 0 0
Bit No.
Entry for the 30th configured address area
Entry for the 31st configured address area
Entry for the 32nd configured address area
Figure 2-7
2-28
Structure of the Module Diagnosis of the CPU 31x-2
PLC S7-300, CPU Specifications CPU 312 IFM to CPU 318-2 DP
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CPU 31x-2 as DP Master/DP Slave and Direct Communication
2.6.9
Station Diagnostics
Definition
Device diagnostics provides details on a DP Slave. The station diagnosis begins
as of byte x and can have a maximum of 20 bytes.
Station Diagnostics
The figure below describes the structure and content of the bytes for a configured
address area in transfer memory.
Byte x
7 6
0 0
0 Bit No.
Length of the station diagnosis
incl. byte x (= max. 20 bytes)
Code for station diagnostics
01H: Code for Diagnostic Interrupt
02H: Code for Process Interrupt
Byte x+1
7
0
Number of the configured address
area in transfer memory.
Valid is: Number+3
(Example:
CPU = 02H
1. Address area = 04H
2. Address area = 05H etc.)
Byte x+2
Byte x+3
0 0 0 0 0 0 0 0
Byte x +4
to
byte x +7
Figure 2-8
(Always 0)
Diagnostic data (see Figure 2-9) or
Interrupt data
Structure of the Station Diagnosis
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CPU 31x-2 as DP Master/DP Slave and Direct Communication
As of byte x +4
The purpose of the bytes beginning with byte x+4 depends on byte x+1 (see
Figure 2-8).
Byte x+1 Contains the Code for...
Diagnostic Interrupt (01H)
Hardware interrupt (02H)
The diagnostic data contains the 16 bytes of
status information from the CPU. Figure 2-9
shows the contents of the first four bytes of
diagnostic data. The next 12 bytes are always
0.
You can freely program 4 interrupt information
bytes for the process interrupt. In STEP 7,
transfer these bytes with SFC 7 “DP_PRAL”
to the DP Master
(refer to Chapter 2.6.10).
Bytes x+4 to x+7 for Diagnostic Interrupts
Figure 2-9 shows the structure and content of bytes x +4 to x +7 for the diagnostic
interrupt. The contents of these bytes correspond to the contents of data record 0
of the diagnostic data in STEP 7 (in this case, not all bits are assigned).
Byte x+4
7
0 Bit No.
0 0 0 0 0 0 0
0: Module OK.
1: Module error
7
Byte x+5
4 3
0
Bit No.
0 0 0 0 1 0 1 1
ID for the address area in transfer
memory (constant)
Byte x+6
7
2
0
0 0 0 0 0
0 0
Bit No.
0: Operating state RUN
1: Operating state STOP
Byte x+7
Figure 2-9
2-30
7
0 Bit No.
0 0 0 0 0 0 0 0
Byte x +4 to x +7 for Diagnostic and Hardware interrupt
PLC S7-300, CPU Specifications CPU 312 IFM to CPU 318-2 DP
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CPU 31x-2 as DP Master/DP Slave and Direct Communication
2.6.10
Interrupts
Interrupts with S7/M7 DP Master
You can trigger a process interrupt at the DP Master in the user program of a CPU
31x-2 operating as DP Slave. A call of SFC 7 “DP_PRAL” triggers an OB40 in the
user program of the DP Master. SFC 7 allows you to forward interrupt information
in a DWORD to the DP master; this information can then be evaluated in OB 40 in
variable OB40_POINT_ADDR. You can program the interrupt information as
desired. A detailed description of SFC 7 “DP_PRAL” can be found in the reference
manual entitled System Software S7-300/400 - System and Standard Functions.
Interrupts with Another DP Master
If you are running the CPU 31x-2 with another DP master, these interrupts are
reflected in the station diagnosis of the CPU 31x-2. You must post-process the
relevant diagnostic events in the DP master’s user program.
Note
When evaluating diagnostic/process interrupts with another DP Master via
device-specific diagnostics, take into consideration:
The DP master should be able to store the diagnostic messages, that is, the
DP master should have a ring buffer in which to place these messages. If the
DP master can not store diagnostic messages, only the last diagnostic
message would be available for evaluation.
You must scan the relevant bits in the device-related diagnostic data in your
user program at regular intervals. You must also take the PROFIBUS-DP’s bus
cycle time into consideration so that you can scan the bits at least once in sync
with the bus cycle time, for example.
With an IM 308-C operating as DP Master, you cannot use process interrupts
in a device-specific diagnosis because only incoming interrupts are reported,
rather than outgoing interrupts.
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CPU 31x-2 as DP Master/DP Slave and Direct Communication
2.7
Direct Data Exchange
As of STEP 7 V 5.x you can configure “Direct Data Exchange” for your PROFIBUS
nodes. The CPU 31x-2 can take part in direct communication as the sender or
receiver.
“Direct communication” is a special communication relationship between
PROFIBUS-DP nodes.
Principle
Direct communication is characterized by the fact that the PROFIBUS-DP nodes
“listen in” to find out which data a DP slave is sending back to its DP master.
Using this function the eavesdropper (receiver) can directly access changes in the
input data of remote DP slaves.
In your configuration with STEP 7, specify via respective peripheral input
addresses the address area of the receiving station to which requested send data
is fetched.
A CPU 31x-2 can be:
Transmitter operating
Receiver operating
as DP Slave
as DP Slave or DP Master, or as CPU that is not
tied into a master system (see Figure 2-10).
Example:
Figure 2-10 shows an example of the direct communication “relationships” you can
configure. The figure shows all DP Masters and DP Slaves as CPU 31x-2. Note
that other DP Slaves (ET 200M, ET 200X, ET 200S) can only operate as
transmitters.
CPU
31x-2
DP master system 1
DP master system 2
CPU 31x-2 as
DP master
1
CPU 31x-2 as
DP master
2
PROFIBUS
CPU
31x-2
as DP
slave 1
Figure 2-10
2-32
CPU
31x-2
as DP
slave 2
DP slave
3
CPU
31x-2
as DP
slave 4
DP slave
5
Direct Communication using CPU 31x-2
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CPU 31x-2 as DP Master/DP Slave and Direct Communication
2.8
Diagnosis with Direct Communication
Diagnostic Addresses
With direct communication you allocate a diagnostic address on the receiver:
CPU 31x-2 as Sender
CPU 31x-2 as Receiver
PROFIBUS
Diagnostic address
During configuration you define in the
receiver a diagnostic address that is
allocated to the sender.
The receiver receives information on the
status of the sender or on a bus
interruption via this diagnostic address
(see also Table 2-15).
Figure 2-11
Diagnostic address for receiver with direct communication
Event Detection
Table 2-15 shows how a CPU 31x-2 operating as receiver recognizes data
transmission errors.
Table 2-15 Event Detection by CPU 31x-2 Acting as Receiver in Direct Communication
Event
Bus
interruption<FJ>(shortcircuit, plug
disconnected)
What Happens in the Receiver
OB 86 is called and a station failure reported
(incoming event; diagnostic address of the receiver, assigned
to the sender)
on peripheral access: Call of OB 122 <FJ>(Peripheral access
error)
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CPU 31x-2 as DP Master/DP Slave and Direct Communication
Evaluation in the User Program
Table 2-16 shows you how you can, for example, evaluate the station failure of the
sender in the receiver (see also Table 2-15).
Table 2-16 Evaluation of the Station Failure of the Sender During Direct Communication
In the Sender
In the Receiver
Diagnostic Addresses Example:<FJ>
Master diagnostic address =1023<FJ>
Slave diagnostic address in the master<FJ>
system =1022
Diagnostic address: (Example)
Diagnostic address =444
Station failure
The CPU calls OB 86 with the following
information:
OB 86_MDL_ADDR:=444
OB86_EV_CLASS:=B#16#38
(incoming event)
OB86_FLT_ID:=B#16#C4
(failure of a DP station)
Tip: The CPU’s diagnostic data buffer also
contains this information
2-34
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3
Cycle and Reaction times
Introduction
In this section, we explain what the cycle time and the response time of the S7-300
consist of.
You can use the programming device to read the cycle time of your user program
(see the STEP 7 online help system).
The example below shows you how to calculate the cycle time.
The response time is more important for the process. In this chapter we will show
you in detail how to calculate the response time.
In This Section
Section
Contents
Page
3.1
Cycle Time
3-2
3.2
Response Time
3-3
3.3
Calculation Example for Cycle Time and Response Time
3-10
3.4
Interrupt Response Time
3-14
3.5
Calculation Example for the Interrupt Response Time
3-16
3.6
Reproducibility for Delay and Watchdog Interrupt
3-16
Execution times
for the STEP 7 instructions processed by the CPU
for the SFCs/SFBs integrated in the CPUs
for IEC functions you can call in STEP 7
can be found in the S7300 Instruction List
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3-1
Cycle and Reaction times
3.1
Cycle time
Cycle Time – A Definition
The cycle time is the time that elapses during one program cycle.
Component Parts of the Cycle Time
The cycle time comprises:
Factors
Remarks
Operating system execution time
Process image transfer time
(PII and PIO)
See Section 3.2
User program execution time
Can be calculated on the basis of the execution times of the
individual instructions (see the S7-300 Instruction List ) and a
CPU-specific factor (see Table 3-3)
S7 timer (not in the case of the
CPU318-2)
See Section 3.2
PROFIBUS DP
Integrated functions
Communication via the MPI
You configure the maximum permissible cycle load produced by
communication in percent in STEP 7
Loading through interrupts
See Sections 3.4 and 3.5
Figure 3-1 shows the component parts of the cycle time
Operating
system
User
program
Interrupts
PII
Operating
system
User
program
PIO
Figure 3-1
3-2
Component Parts of the Cycle Time
PLC S7-300, CPU Specifications CPU 312 IFM to CPU 318-2 DP
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Cycle and Reaction times
Extending the Cycle Time
Note that the cycle time of a user program is extended by the following:
3.2
Time-controlled interrupt handling
process interrupt processing (also refer to Chapter 3.4)
Diagnostics and error handling (see also Section 3.4)
Communication via MPI
Response Time
Response Time – A Definition
The response time is the time between detection of an input signal and
modification of an associated output signal.
Factors
The response time depends on the cycle time and the following factors:
Factors
Delay of the inputs and outputs
Remarks
The delay times are given in the technical specifications
In the Module Specifications Reference Manual for the
signal modules
In Chapter1.4.1 for the integrated I/O of the CPU 312
IFM.
In Chapter1.4.4 for the integrated inputs/outputs of the
CPU 314 IFM.
Additional bus runtimes on the PROFIBUS
subnet
CPU 31x-2 DP only
Range of Fluctuation
The actual response time lies between a shortest and a longest response time.
You must always reckon on the longest response time when configuring your
system.
The shortest and longest response times are considered below to let you get an
idea of the width of fluctuation of the response time.
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3-3
Cycle and Reaction times
Shortest Response Time
Figure 3-2 shows you the conditions under which the shortest response time is
reached.
Delay of the inputs
Response Time
PII
Operating
system
User
program
PIO
The status of the observed input changes
immediately before reading in the PII. The
change in the input signal is therefore taken
account of in the PII.
The change in the input signal is processed
by the user program here.
The response of the user program to the
input signal change is passed on to the
outputs here.
Delay of the outputs
Figure 3-2
Shortest Response Time
Calculation
The (shortest) response time consists of the following:
1 Process image transfer time of the inputs +
1 operating system execution time +
1 Program execution time +
1 Process image transfer time of outputs +
Execution time of S7 timer
Delay of the inputs and outputs
This corresponds to the sum of the cycle time and the delay of the inputs and
outputs.
3-4
PLC S7-300, CPU Specifications CPU 312 IFM to CPU 318-2 DP
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Cycle and Reaction times
Longest Response Time
Figure 3-3 shows the conditions that result in the longest response time.
Delay of the inputs + bus runtime on
the PROFIBUS-DP
PII
Operating
system
While the PII is being read in, the status of
the observed input changes. The change in
the input signal is no longer taken into
account in the PII.
Response Time
User
program
PIO
The change in the input signal is taken
account of in the PII here.
PII
Operating
system
User
program
The change in the input signal is processed
by the user program here.
PIO
The response of the user program to the
input signal change is passed on to the
outputs here.
Delay of the outputs + bus runtime on
the PROFIBUS-DP
Figure 3-3
Longest Response Time
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3-5
Cycle and Reaction times
Calculation
The (longest) response time consists of the following:
2 Process image transfer time of inputs +
2 Process image transfer time of outputs +
2 Operating system execution time+
2 program execution time+
2 Bus runtime on the PROFIBUS-DP bus system (with CPU 31x-2 DP)
Execution time of the S7 timer+
Delay of the inputs and outputs
This corresponds to the sum of the double cycle time and the delay of the inputs
and outputs plus the double bus runtime.
Operating System Processing Time
Table 3-1 contains all the times needed to calculate the operating system
processing times of the CPUs.
The times listed do not take account of
Table 3-1
Test functions, e.g. monitor, modify
Functions: Load block, delete block, compress block
Communication
Operating System Processing Times of the CPUs
Sequence
Cycle control
CPU
312 IFM
CPU
313
CPU
314
CPU
314 IFM
CPU
315
CPU
315-2 DP
CPU
316-2 DP
600 to
1200
ms
540 to
1040
ms
540 to
1040
ms
770 to
1340
ms
390 to
820 ms
500 to
1030 ms
500 to
1030 ms
CPU
318-2
200 s
Process Image Update
Table 3-2 contains the CPU times for process image updates (Process image
transfer time). The times specified are “ideal values” which are prolonged by
interrupts or by communication of the CPU.
(Process image = PI)
The time required by the CPU time for a process image update is calculated by
K + number of bytes in the PI of module rack “0”A
+ number of bytes in the PI of module racks “1 to 3“B
+ number of bytes in the PI via DP D
= Process image transfer time
3-6
PLC S7-300, CPU Specifications CPU 312 IFM to CPU 318-2 DP
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Cycle and Reaction times
Table 3-2
Process image update of the CPUs
Components
CPU
312
IFM
CPU
313
CPU
314
CPU
314
IFM
CPU
315
CPU
315-2
DP
CPU
316-2
DP
CPU
318-2
K Base load
162s
142s
142s
147s
109s
10s
10s
20s
A For each byte in rack
“0”
14.5s
13.3s
13.3s
13.6s
10.6s
20s
(per
word)
20s
(per
word)
6 s
B For each byte in racks
“1 to 3”
16.5s
15.3s
15.3s
15.6s
12.6s
22s
(per
word)
22s
(per
word)
12.4s
D For each byte in DP
area for integrated DP
interface
–
–
–
–
–
12s
(per
word)
12s
(per
word)
1s
User Program Processing Time:
The user program processing time is made up of the sum of the execution times
for the instructions and the SFB/SFCs called up. These execution times can be
found in the Instruction List. Additionally, you must multiply the user program
processing time by a CPU-specific factor. This factor is listed in Table 3-3 for the
individual CPUs.
Table 3-3
Sequence
CPU-specific Factors for the User Program Processing Time
CPU 312
IFM
CPU 313
CPU 314
CPU 314
IFM
CPU 315
CPU
315-2DP
CPU
316-2 DP
1.23
1.19
1.15
1.15
1.15
1.19
1.19
Factor
CPU
318-2
1.0
S7 timers
In the case of the CPU 318-2, the updating of the S7 timers does not extend the
cycle time.
The S7 Timer is updated every 10 ms.
You can find out in Section 3.3 how to include the S7 timers in calculations of the
cycle and response times.
Table 3-4
Updating the S7 Timers
Sequence
Updating the S7
timers (every 10 ms)
312 IFM
313
314
314 IFM
315
315-2DP
316-2DP
Number of
Number of simultaneously active S7 timers 8 ms
simultaneously
active S7
timers 10 s
PLC S7-300, CPU Specifications CPU 312 IFM to CPU 318-2 DP
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3-7
Cycle and Reaction times
PROFIBUS-DP interface
In the case of the CPU 315-2 DP/316-2DP, the cycle time is typically extended by
5% when the PROFIBUS-DP interface is used.
In the case of the CPU 318-2, there is no increase in cycle time when the
PROFIBUS-DP interface is used.
Integrated Functions
With CPU 312-IFM and 314-IFM operation the cycle time increases by a maximum
of 10% when using integrated functions. Also take into consideration a possible
instance DB update during the cycle checkpoint.
Table 3-5 shows the update times of the instance DB at the scan cycle checkpoint,
together with the corresponding SFB runtimes.
Table 3-5
Update Time and SFB Runtimes
CPU 312 IFM/314 IFM
Update Time of the
Instance DB at the Scan
Cycle Checkpoint
SFB Runtime
IF Frequency Measurement
(SFB 30)
100 s
220 s
IF Counting (SFB 29)
150 s
300 s
IF Counting (Parallel
counter) (SFB 38)
100 s
230 s
IF Positioning (SFB 39)
100 s
150 s
Delay of the Inputs and Outputs
You must take account of the following delay times, depending on the module:
For digital inputs:
For digital outputs: Negligible delay times
For relay outputs:
The input delay time
Typical delay times of between 10 ms and 20 ms.
The delay of the relay outputs depends, among other things, on the
temperature and voltage.
3-8
For analog inputs:
For analog outputs: Response time of the analog output
Cycle time of the analog input
PLC S7-300, CPU Specifications CPU 312 IFM to CPU 318-2 DP
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Cycle and Reaction times
Bus Runtimes in the PROFIBUS Subnet
If you have used STEP 7 to configure your PROFIBUS subnet, STEP 7 calculates
the expected normal bus cycle time. On the PG you can then view the bus cycle
time of your configuration (refer to the STEP 7 User Manual).
An overview of the bus runtime is provided in Figure 3-4. In this example, we
assume that each DP slave has an average of 4 bytes of data.
Bus runtime
7 ms
Baud rate: 1.5 Mbit/s
6 ms
5 ms
4 ms
3 ms
2 ms
1 ms
Baud rate: 12
Mbit/s
Min. slave
interval
1
Figure 3-4
2
4
8
16
32
64
Number of DP slaves
Overview of the Bus Runtime on PROFIBUS-DP at 1.5 Mbps and 12Mbps
Take the bus cycle time into consideration for every master when operating a
PROFIBUS subnet with more than one master. That is, bus cycle time total = bus
cycle time number of masters.
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3-9
Cycle and Reaction times
Extending the Cycle by Nesting Interrupts
Table 3-6 shows typical extensions of the cycle time through nesting of an
interrupt. The program runtime at the interrupt level must be added to these. If
several interrupts are nested, the corresponding times need to be added.
Table 3-6
Extending the Cycle by Nesting Interrupts
Interrupts
Hardware
<FJ>interr
upt
312 IFM
314
314 IFM
315
315-2 DP
316-2DP
318-2
approx.
approx.
approx.
approx.
approx.
approx.
approx.
approx.
840 s
700 s
700 s
730 s
480 s
590 s
590 s
340ms
approx.
approx.
approx.
approx.
approx.
approx.
approx.
880 s
880 s
1000 s
700 s
860 s
860 s
450 s
approx.
approx.
approx.
approx.
approx.
approx.
680 s
700 s
460 s
560 s
560 s
350 s
approx.
approx.
approx.
approx.
approx.
approx.
550 s
560 s
370 s
450 s
450 s
260 s
approx.
approx.
approx.
approx.
approx.
approx.
360 s
380 s
280 s
220 220 260 s
approx.
approx.
approx.
approx.
approx.
approx.
740 s
740 s
760 s
560 s
490 s
490 s
approx.
130/ 155/
285 s
Diagnostic
interrupt
–
Time–of–d
ay
interrupt
–
Delay
interrupt
–
Watchdog
interrupt
–
Programm
ing/
access
error/
program
execution
error
–
3.3
313
–
–
–
Calculation Examples for Cycle Time and Response Time
Component Parts of the Cycle Time
As a reminder: The cycle time comprises:
3-10
process image transfer time +
operating system processing time +
user program processing time +
Processing time of S7 timers
PLC S7-300, CPU Specifications CPU 312 IFM to CPU 318-2 DP
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Cycle and Reaction times
Sample Configuration 1
You have configured an S7-300 with the following modules on one rack:
1 CPU 314
2 SM 321 DI 32DC 24 V digital input modules (4 bytes each in the PI)
2 SM 322 DO 32DC 24 V/0.5A (4 bytes each in the PI)
According to the Instruction List, the user program has a runtime of 1.5 ms.
There is no communication.
Calculation
In this example, the cycle time is calculated from the following times:
Process image transfer time
Input process image: 147 s + 8 bytes13.6 s = approx. 0.26 ms
Output process image: 147 s + 8 bytes 13.6 s = approx. 0.26 ms
Operating system cycle time
Cycle control: approx. 1 ms
User program processing time:
approx. 1.5 ms CPU specific factor 1.15 = approx. 1.8 ms
Processing time of S7 timers
Assumption: 30 S7 timers are running.
For 30 S7 timers, the one-off update takes
30 8 s = 240s.
Process image transfer time + operating system processing time + user
program cycle time results in this time interval:
0.26 ms + 0.26 ms + 1 ms + 1.8 ms = 3.32 ms.
Since the S7 timers are called every 10 ms, a maximum of one call can be
made in this time interval, i.e. the S7 timers might increase cycle time by a
maximum of 240 s (= 0.24 ms)
The cycle time is calculated from the sum of the listed times:
Cycle time = 0.26 ms + 0.26 ms + 1 ms + 1.8 ms + 0.24 ms = 3.56 ms.
PLC S7-300, CPU Specifications CPU 312 IFM to CPU 318-2 DP
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3-11
Cycle and Reaction times
Parts of the Response Time
As a reminder, the response time is formed by the sum of:
2 Process image transfer time of inputs +
2 Process image transfer time of outputs +
2 operating system cycle time+
2 program cycle time+
Processing time of the S7 timers +
Delay times of the inputs and outputs
Tip: Simple calculation: calculated cycle time 2 + delay times.
Thus, for example one applies: 3.34 ms 2 + timers
the I/O modules.
Sample Configuration 2
You have configured an S7-300 with the following modules on two racks:
1 CPU 314
4 SM 321 DI 32DC 24 V digital input modules (4 bytes each in the PI)
3 SM 322 DO 16 DC 24 V/0.5A (2 bytes each in the PI)
2 SM 331 AI 812 bits (not in the process image)
2 SM 332 AI 412 bits (not in the process image)
User program
According to the Instruction List, the user program has a runtime of 2 ms. By
taking into account the CPU-specific factor of 1.15, the resulting runtime is approx.
2.3 ms. The user program operates up to 56 S7 timers simultaneously. No
activities are required at the scan cycle checkpoint.
Calculation
In this example, the response time is calculated from the following times:
Process image transfer time
Input process image: 147 s + 16 bytes 13.6 s = approx. 0.36 ms
Output process image: 147 s + 6 bytes 13.6 s = approx. 0.23 ms
Operating system execution time
Cycle control: approx. 1 ms
3-12
User program processing time: 2.3 ms
PLC S7-300, CPU Specifications CPU 312 IFM to CPU 318-2 DP
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Cycle and Reaction times
1. Intermediate calculation: Timebase for the calculation of S7 timer
processing time is the sum of all times mentioned above:
20.36 ms
+ 20.23 ms
+ 21 ms
+ 22.3 ms
(Input process image transfer time)
(Output process image transfer time)
(Operating system cycle time)
User program cycle time) 7.8 ms.
Processing time of S7 timers
Time required for a single update of 56 S7 timers: 568 s = 448 s 0.45
ms.
Since the S7 timers are called every 10 ms, a maximum of one call can be
made in the cycle time, i.e. the cycle time can be increased through the S7
timers by a maximum of 0.45 ms.
2. Intermediate calculation:The response time without I/O delay is formed by
the sum of
8.0 ms
+ 0.45 ms
=8.45 ms.
(result of the first intermediate calculation)
(S7 timer processing time)
Delay times of the inputs and outputs
– The SM 321 The maximum delay time of the DI 32DC 24 V digital input
module is 4.8ms per channel.
– Output delay of the digital output module SM 322; DO 16DC 24 V/0.5A
can be ignored.
– The SM 331; AI 8 12bit analog input module was configured for an
interference frequency suppression of 50 Hz. This yields a conversion time
of 22 ms per channel. Since 8 channels are active, the cycle time for the
analog input module is 176 ms.
– Analog output module SM 332 AO 412–bit was configured for a
measurement range of 0 ...10V. The conversion time is 0.8 ms per channel.
Thus, 4 active channels result in a cycle time of 3.2 ms. To be added is the
settling time of 0.1 ms for ohmic loads. Thus, the response time at the
analog output is 3.3 ms.
Response times with delay times for inputs and outputs:
Case 1: A digital output module channel is set after a digital input signal is
received. This results in a response time of:
Response time = 4.8 ms + 8.45 ms = 13.25 ms.
Case 2: An analog value is fetched and an analog value is output. This results
in a response time of:
Response time = 176 ms + 8.45 ms + 3.3 ms = 187.75 ms.
PLC S7-300, CPU Specifications CPU 312 IFM to CPU 318-2 DP
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3-13
Cycle and Reaction times
3.4
Interrupt response time
Interrupt Response Time – A Definition
The interrupt response time is the time that elapses between the first occurrence of
an interrupt signal and the calling of the first instruction in the interrupt OB.
Generally valid is: High-priority interrupts are preferred. This means the interrupt
response time is increased by the program processing time of the higher-priority
interrupt OBs and the interrupt OBs of equal priority that have not yet been
executed.
Calculation
The interrupt response time is calculated as follows:
Shortest interrupt response time =
minimum CPU interrupt response time +
minimum interrupt response time of the signal modules +
PROFIBUS-DPbus cycle time
Longest interrupt response time =
maximum CPU interrupt response time +
maximum interrupt response time of the signal modules +
2 PROFIBUS-DPbus cycle time
Process interrupt response time of the CPUs
Table 3-7 lists the response time of the CPUs to process interrupts (without
communication).
Table 3-7
3-14
Response time of the CPUs to process interrupts
CPU
Min.
Max.
312 IFM
0.6 ms
1.5 ms
313
0.5 ms
1.1 ms
314
0.5 ms
1.1 ms
314 IFM
0.5 ms
1.1 ms
315
0.3 ms
1.1 ms
315-2 DP
0.4 ms
1.1 ms
316-2DP
0.4 ms
1.1 ms
318-2
0.23 ms
0.27 ms
PLC S7-300, CPU Specifications CPU 312 IFM to CPU 318-2 DP
A5E00111190-01
Cycle and Reaction times
Diagnostic Interrupt Response Times of the CPUs
Table 3-8 lists the diagnostic interrupt response times of the CPUs (without
communication).
Table 3-8
Diagnostic Interrupt Response Times of the CPUs
CPU
Min.
Max.
312 IFM
–
–
313
0.6 ms
1.3 ms
314
0.6 ms
1.3 ms
314 IFM
0.7 ms
1.3 ms
315
0.5 ms
1.3 ms
315-2 DP
0.6 ms
1.3 ms
316-2DP
0.6 ms
1.3 ms
318-2
0.32 ms
0.38 ms
Signal Modules
The response time of signal modules to process interrupts is calculated as follows:
Digital input modules
Process interrupt response time = internal interrupt processing time + Input
delay
You will find the times in the data sheet for the individual analog input module.
Analog input modules
Process interrupt response time = internal interrupt processing time +
Conversion time
The internal interrupt preparation time for the analog input modules is negligible.
The conversion times can be found in the data sheet for the individual digital
input modules.
The diagnostic interrupt response time of the signal modules is the time that
elapses between the detection of a diagnostic event by the signal module and the
triggering of the diagnostics interrupt by the signal module. This time is negligible.
Process interrupt processing
process interrupts are processed at the call of interrupt OB40. Higher-priority
interrupts interrupt hardware interrupt processing, the I/O is accessed directly at
the time of instruction execution. After the process interrupt has been processed,
cyclic program processing continues, or lower-/higher-priority interrupt OBs are
called and processed.
PLC S7-300, CPU Specifications CPU 312 IFM to CPU 318-2 DP
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3-15
Cycle and Reaction times
3.5
Calculation Example for the Interrupt Response Time
Parts of the Interrupt Response Time
As a reminder: The process interrupt response time is formed by:
Response time of the CPU to process interrupt and
the response time of the signal module to process interrupt.
Example: Your S7-300 assembly consists of a CPU 314 and four digital modules.
One digital input module is the SM 321; DI 16DC 24V; with hardware/diagnostic
interrupt configuration. In your CPU and SM configuration you have enabled only
process interrupt. You decided not to use time-controlled processing, diagnostics
or error handling. You configured an input delay of 0.5 ms for the digital input
module. No activities are necessary at the scan cycle checkpoint. There is no
communication via the MPI.
Calculation
In this example, the response time to process interrupt is calculated from following
times:
Response time of CPU 314 to process interrupt: approx. 1.1 ms
Process interrupt response time of SM 321; DI 16DC 24V:
– Internal interrupt preparation time:
0.25 ms
– Input delay
0.5 ms
The process interrupt response time is formed by the sum of all specified times:
Process interrupt response time = 1.1 ms + 0.25 ms + 0.5 ms = approx. 1.85 ms.
This calculated process interrupt response time represents the time expiring
between an incoming signal at the digital input and the first instruction in OB40.
3.6
Reproducibility of Delay and Watchdog Interrupts
Definition of Reproducibility
Delay Interrupt:
The interval between the call-up of the first instruction in the OB and the
programmed time of the interrupt.
Watchdog Interrupt:
The fluctuation of the time interval between two successive call-ups, measured in
each case between the first instruction in the OB.
3-16
PLC S7-300, CPU Specifications CPU 312 IFM to CPU 318-2 DP
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Cycle and Reaction times
Reproducibility
Table 3-9 lists reproducibility of the delay and watchdog interrupts of the CPUs
(without communication).
Table 3-9
Reproducibility of the Delay and Watchdog Interrupts of the CPUs
CPU
Reproducibility
Delay Interrupt
Watchdog Interrupt
314
approx. –1/+0.4 ms
approx. 0.2 ms
314 IFM
approx. –1/+0.4 ms
approx. 0.2 ms
315
approx. –1/+0.4 ms
approx. 0.2 ms
315-2 DP
approx. –1/+0.4 ms
approx. 0.2 ms
316-2DP
approx. –1/+0.4 ms
approx. 0.2 ms
318-2
approx. –0.8/+0.38 ms
approx. 0.04 ms
PLC S7-300, CPU Specifications CPU 312 IFM to CPU 318-2 DP
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3-17
Cycle and Reaction times
3-18
PLC S7-300, CPU Specifications CPU 312 IFM to CPU 318-2 DP
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CPU Function, depending on CPU and
STEP 7 Version
4
In this chapter we describe the functional differences between the various CPU
versions.
These differences are determined by
CPU performance characteristics (especially CPU 318-2) compared to other
CPUs
the functionaliy of CPUs described in this manual in comparison to previous
versions.
Section
Contents
Page
4.1
Differences between CPU 318-2 and CPUs 312 IFM to 316-2 DP
4-2
4.2
Differences of CPUs 312 IFM to 318 to previous versions
4-6
PLC S7-300, CPU Specifications CPU 312 IFM to CPU 318-2 DP
A5E00111190-01
4-1
CPU Function, depending on CPU and STEP 7 Version
4.1
Differences between CPU 3182 and CPUs 312 IFM to 3162 DP
4 rechargeable batteries for 318-2
CPU 318-2
CPUs 312IFM to 316-2DP
4 accumulators
2 accumulators
The following table shows you what to watch for if you want to use an STL user
program of a CPU 312IFM to a CPU 316-2DP for the CPU 318-2.
Instructions
Double integer math
(+I, –I, *I, /I;
+D, –D, *D, /D,MOD;
+R, –R, *R, /R)
User Program from the CPU 312IFM to 316-2DP for the
CPU 318
The CPU 318 transfers the contents of accumulators 3 and 4
to accumulators 2 and 3 after these operations.
If accumulator 2 is evaluated in the (accepted) user program,
you now receive incorrect values with the CPU 318-2
because the value has been overwritten by the contents of
accumulator 3.
Configuration
From 312 IFM to 316-2 DP CPUs, the CPU 318-2 “imports” only projects created
with STEP 7 V 5.x.
You cannot operate programs containing FM or CP (SDB 1xxx) configuration data
(e.g. FM 353/354) in a CPU 318-2!
In this case, the respective project needs to be edited accordingly or recreated.
Starting a Timer in the User Program
The accumulator register in CPU 318–2 must contain a number in BCD format
when starting a timer in your user program (e.g. with SI T).
Force
The differences of force operations are described in Chapter 1.3.1.
Loading the User Program to the Memory Card
CPU 318-2
CPUs 312IFM to 316-2DP
... using the PD function Load User
Program
4-2
... using the PD function Copy RAM To
ROM or Load User Program
PLC S7-300, CPU Specifications CPU 312 IFM to CPU 318-2 DP
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CPU Function, depending on CPU and STEP 7 Version
System ID (only CPU 318-2)
In the object properties of the ”General” tab, you can assign a system ID when
configuring your CPU. This ID can be evaluated in the CPU user program (also
refer to the STEP 7 Online Help relating to the “General” tab).
MPI Addressing
CPU 318-2
The CPU addresses the MPI nodes within its
configuration (FM/CP) via the module start
address.
CPUs 312IFM to 316-2DP
The CPUs address the MPI nodes within their
configuration via the MPI address.
If FM/CP are in the central configuration of an
If FM/CP are in the central configuration of an
S7–300 with their own MPI address, the CPU forms S7–300 with their own MPI address, the FM/CP
its own communication bus (via the backplane bus) and CPU MPI nodes are in the same CPU subnet.
with the FM/CP, separate from the other subnets.
The MPI address of the FM/CP is no longer
relevant for the nodes of other subnets.
Communication to the FM/CP takes place via the
CPU MPI address.
Your S7-300 structure includes an FM/CP addressed via MPI. You want to replace
the CPU 312 IFM ... 316 with a CPU 318-2. An example is shown in Figure 4-1,
Page 4-4.
PLC S7-300, CPU Specifications CPU 312 IFM to CPU 318-2 DP
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4-3
CPU Function, depending on CPU and STEP 7 Version
S7-300
PG
The CPU 316 is replaced
with a CPU 318-2
S7-300
S7-300 with CPU 316
S7-300
OP 25
RS 485
repeater
OP 25
FM FM
FM
PG
Figure 4-1
Sample Configuration
After the CPUs have been swapped, you must proceed as follows (based on the
above example):
Replace the CPU 316 with the CPU 318-2 in the STEP 7 project.
Reconfigure the operator panel/programming device. That means: Reassign the
controls and start address (= MPI address of CPU 318-2 and the respective FM
slot)
Reconfigure the configuration data for the FM/CP to be loaded onto the CPU.
This is necessary to ensure that the FM/CP in this configuration remain accessible
to the operator panel/programming device.
Inserting and Removing a Memory Card (FEPROM)
If you remove a Memory Card and insert a card in with identical content in POWER
OFF state (CPU is not buffered), the result after POWER ON is:
CPU 318-2
CPUs 312IFM to 316-2DP
The CPU 318-2 goes into STOP mode and
request a memory reset.
4-4
The CPU switches to the mode it was in
prior to POWER OFF, i.e. RUN or STOP.
PLC S7-300, CPU Specifications CPU 312 IFM to CPU 318-2 DP
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CPU Function, depending on CPU and STEP 7 Version
Connection resources
CPU 318-2
CPU 318-2 provides a total of 32
communication resources, that is, 32 of
those via MPI/DP interface or 16 via DP
interface.
Those connection resources are freely
available for
PD/OP communication
S7 basic communication
S7 communication and
Routing of PD communication
CPUs 312IFM to 316-2DP
The CPUs provide a specific number of
connection resources.
For
PD communication
OP communication and
S7 basic communication
you can reserve connection resources
which can then not be used by any other
communication function.
The remaining connection resources are
then available for PD/OP/S7 basic and S7
communication.
For routing, the CPUs 315-/316-2 provide
additional connection resources for 4
routing connections.
PLC S7-300, CPU Specifications CPU 312 IFM to CPU 318-2 DP
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4-5
CPU Function, depending on CPU and STEP 7 Version
4.2
The Differences Between the CPUs 312 IFM to 318 and
Their Previous Versions
Memory Cards and Backing Up Firmware on Memory Card
As of the following CPUs:
CPU
As of Version
Order No.
Firmware
Hardware
CPU 313
6ES7 313-1AD03-0AB0
1.0.0
01
CPU 314
6ES7 314-1AE04-0AB0
1.0.0
01
CPU 315
6ES7 315-1AF03-0AB0
1.0.0
01
CPU 315-2
6ES7 315-2AF03-0AB0
1.0.0
01
CPU 316-2
6ES7 316-1AG00-0AB0
1.0.0
01
You can:
4-6
Insert the 16 bit-wide memory cards:
256 Kbyte FEPROM
6ES7 951-1KH00-0AA0
1 Mbyte FEPROM
6ES7 951-1KK00-0AA0
2 Mbyte FEPROM
6ES7 951-1KL00-0AA0
4 Mbyte FEPROM
6ES7 951-1KM00-0AA0
Back up the CPU firmware on memory card
PLC S7-300, CPU Specifications CPU 312 IFM to CPU 318-2 DP
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CPU Function, depending on CPU and STEP 7 Version
MPI Addressing
You Have a CPU as of Order Number and
Version:
Your CPU version and order number is lower
than the following:
6ES7312-5AC01-0AB0, version 01
6ES7313-1AD02-0AB0, version 01
6ES7314-1AE03-0AB0, version 01
6ES7314-5AE02-0AB0, version 01
6ES7315-1AF02-0AB0, version 01
6ES7315-2AF02-0AB0, version 01
6ES7316-1AG00-0AB0, version 01
–
and STEP 7 V4.02 or later
and STEP 7 < V4.02
The CPU accepts the MPI addresses configured by
you in STEP 7 for the relevant CP/FM in an S7300
or
automatically determines the MPI address of the
CP/FM in an S7-300 on the pattern
MPI addr. CPU; MPI addr.+1 MPI addr.+2 etc.
CPU
MPI
addr.
CP
CP
MPI
addr.
“x”
MPI
addr.
“z”
The CPU automatically establishes the MPI
address of the CP/FM in an S7–300 on the
pattern MPI addr. CPU; MPI addr.+1 MPI addr.+2
etc.
CPU
MPI
addr.
CP
CP
MPI
addr.+1
MPI
addr.+2
MPI with 19.2 Kbps
With STEP 7 as of V4.02 you can set a transmission rate for the MPI of 19.2 Kbps.
The CPUs support 19.2 Kbps as of the following order numbers:
6ES7312-5AC01-0AB0, version 01
6ES7313-1AD02-0AB0, version 01
6ES7314-1AE03-0AB0, version 01
6ES7314-5AE02-0AB0, version 01
6ES7315-1AF02-0AB0, version 01
6ES7315-2AF02-0AB0, version 01
PLC S7-300, CPU Specifications CPU 312 IFM to CPU 318-2 DP
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4-7
CPU Function, depending on CPU and STEP 7 Version
CPU 315-2 DP
v 6ES7 315-2AF03-0AB0
and STEP 7 < V 5.x
as of 6ES7
315-2AF03-0AB0 and
STEP 7 as of V 5.x
Direct communication
No
Yes
Equidistance
No
Yes
Activation/deactivation of DP
slaves
No
Yes
Routing
No
Yes
See Figure 2-1 on page 2-8
See Figure 2-2 on page 2-9
CPU 315-2 DP
Reading out of slave
diagnosis
Connection resources
From CPU
As of Version
Order No.
Firmware
Hardware
CPU 312 IFM
6ES7 312-5AC02-0AB0
1.1.0
01
CPU 313
6ES7 313-1AD03-0AB0
1.1.0
01
CPU 314
6ES7 314-1AE04-0AB0
1.1.0
01
CPU 314 IFM
6ES7 314-5AE03-0AB0
1.1.0
01
CPU 314 IFM
6ES7 314-5AE10-0AB0
1.1.0
01
CPU 315
6ES7 315-1AF03-0AB0
1.1.0
01
CPU 315-2 DP
6ES7 315-2AF03-0AB0
1.1.0
01
CPU 316-2 DP
6ES7 316-2AG00-0AB0
1.1.0
01
... can be reserved for PD communication, OP communication and S7 basic
communication.
In this case, the free communication resources are available for PD/OP/S7 basic
or S7 communication (see also Chapter 1.2).
CPU versions earlier than those referred to above provide a fixed number of
connection resources for the applicable communication functions.
4-8
PLC S7-300, CPU Specifications CPU 312 IFM to CPU 318-2 DP
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CPU Function, depending on CPU and STEP 7 Version
New SFBs and SFCs in CPU 318-2
Function
Block
SFB 52
Application
Fetching data records to a DP Slave
Execution time
in ms
Initial call
221
Intermediate call 111
SFB 53
SFB 54
Fetching data records to a DP Slave
Final call
158
Initial call
284
Second call
110
Final call
110
See...
Online help
Standard
and
System
functions
in STEP 7
Receiving interrupts from a DP Slave
(not for I/O-dependent
OBs,MODE 1, OB1)
90
integrated DP interface,
(MODE 1, OB 40, 83, 86)
170
(OB 55 to OB 57, OB 82)
176
(central peripherals,
MODE 1, OB 40, OB 82)
PLC S7-300, CPU Specifications CPU 312 IFM to CPU 318-2 DP
A5E00111190-01
140
4-9
CPU Function, depending on CPU and STEP 7 Version
Function
Block
SFC 100*
SFC 105*
SFC 106
SFC 107
SFC 108
Application
Setting TOD and TOD Status
Reading dynamic system
resources
Releasing dynamic system
resources
Creating block related messages
including an acknowledgement
function
Creating block related messages
Execution time
in ms
MODE 1
274
MODE 2
84
MODE 3
275
MODE 0
MODE 1
MODE 2
117-1832
138-2098
139-1483
MODE 3
140-2128
MODE 1
MODE 2
123-1376
126-1334
MODE 3
125-1407
Initial call
Empty call
Initial call
257
101
271
Empty call
115
See...
Online help
Standard
and
Systemfunctions in
STEP 7
without acknowledgement function
* MODE 0:
Depending on the size of the target area SYS_INST and the number of
system resources still to be fetched.
MODE 1 and 2:
Depends on the number of active messages (occupied system resources).
MODE 3:
Depends on the number of active messages (occupied system resources) and
the number of instances used with the CMP_ID to be found.
4-10
PLC S7-300, CPU Specifications CPU 312 IFM to CPU 318-2 DP
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CPU Function, depending on CPU and STEP 7 Version
Description of Diverse SFB Execution Times
The BUSY output parameter indicates the current job status.
Initial call:
Job starts with the execution,
d. h. BUSY status is toggled from 0 to 1.
Intermediate call:
The job is being executed,
d. h. BUSY retains 1 status.
Final call:
The job was executed,
d. h. BUSY status is reset from 1 to 0.
Description of Diverse SFC Execution Times
Configure the desired operating mode in your SFCs modes. The significance of a
specific mode depends on the respective function block. For details please refer to
the Online Help on Standard and System Functions in STEP 7.
Consistent User Data
If you want to download consistent user data areas (I/O area with full length
consistency) to a DP system, note the following:
CPU 315–2 DP
CPU 316–2 DP
CPU 318–2 DP
CPU 318–2 DP (Firmware Version > 3.0)
(Firmware Version < 3.0)
Consistent user data
are not updated automatically, even if
they exist in the process image.
You can select whether or not to update this
area, provided the address area of consistent
user data exists in the process image.
SFC14 and SFC 15 are required for
reading/writing consistent user data.
You can also use SFC14 and SFC 15 to read
and write consistent data.
User data areas can also be accessed directly
(e.g. L PEW... T PAW...).
PLC S7-300, CPU Specifications CPU 312 IFM to CPU 318-2 DP
A5E00111190-01
4-11
CPU Function, depending on CPU and STEP 7 Version
4-12
PLC S7-300, CPU Specifications CPU 312 IFM to CPU 318-2 DP
A5E00111190-01
5
Tips and Tricks
Tip on the Parameter “Monitoring time for ...” in STEP 7
Configure the parameters for “Monitoring time
for parameter download to module”
ready message by module”
the highest values if you are not certain of the times required on the S7-300.
CPU 31x-2DP is DP Master
You can also set power-up time monitoring
for the DP slaves with the “Transfer of
parameters to modules” parameter.
CPU 318-2 is DP Master
You can set power-up time monitoring for
the DP slaves with both of the above
parameters.
This means that the DP slaves must be powered up and configured by the CPU (as DP
master) in the set time.
FM in a Distributed Configuration in an ET 200M (CPU 31x-2 is DP Master)
If you operate an FM 353/354/355 in an ET 200M with IM 153-2 and remove and
reinsert the FM in ET 200M, you must perform a cold restart (power off/on) in the
ET 200M.
Reason: The CPU does not rewrite the parameters to the FM unless the ET200M
is initialized with “POWER ON”.
The Retentive Feature of Data Blocks
You must note the following for the retentivity of data areas in data blocks:
PLC S7-300, CPU Specifications CPU 312 IFM to CPU 318-2 DP
A5E00111190-01
5-1
Tips and Tricks
Without Backup Battery
With Backup Battery
CPU program on Memory
Card or in the integral
EPROM of the
312IFM/314IFM
All DBs are retentive,
whatever configuration has
been performed. The DBs
generated using SFC 22
“CREAT_DB” are also
retentive.
Memory card not plugged
in
All DBs (retentive,
The DBs configured as
non-retentive) are transferred retentive retain their contents
from the memory card or from
the integral EPROM into RAM
on restart.
Data blocks or data areas you have generated with
SFC22 ”CREAT_DB” are not retentive.
After a power failure, the retentive data areas are retained.
Note:These data areas are stored in the CPU, not on the
memory card. The non-retentive data areas contain
whatever has been programmed on EPROM.
Watchdog Interrupt: Scan period > 5 ms
For the watchdog interrupt, you should set a scan period > 5 ms. With lower values
the risk of frequent occurrence of watchdog interrupt errors increases, for example,
depending on
The program cycle time of an OB35
Frequency and program cycle time of higher priority classes
Programming device functions.
Hardware Interrupts Generated in I/O Modules
When using applications critical to hardware interrupt, insert the
hardware-triggering modules as close to the CPU as possible.
Reason: Interrupts generated in module rack 0, slot 4, are read first. The other
slots follow in ascending order.
5-2
PLC S7-300, CPU Specifications CPU 312 IFM to CPU 318-2 DP
A5E00111190-01
Tips and Tricks
CPU 312 IFM and 314 IFM: Erasing the integrated EPROM
If you wish to erase the contents of the integrated EPROM, proceed as follows:
1. Open a window with an Online view of the opened project via menu command
View Online, or
open the Online nodes window per click on the Online nodes in the function
bar, or select the menu item PLC Show online nodes.
2. Select the MPI number of the target CPU (double-click).
3. Select the Function Block container.
4. Select the menu item Edit Mark all.
5. Then select the menu item File Delete, or press the DEL key. This deletes all
the selected blocks from the target memory.
6. Select the MPI number of the target CPU.
7. Select the menu item PLC
Copy RAM to ROM.
This command deletes all blocks online and overwrites the EPROM with the blank
contents of the RAM.
SFB “DRUM” - Reversed Bytes in Output Parameter OUT-WORD
With the SFB “DRUM”, the following CPUs return the value with reversed bytes on
the output parameter OUT_WORD.
CPU 312 IFM
CPU 313
CPU 314
CPU 314 IFM
CPU 315
CPU 315-2 DP
CPU 316
up to
up to
up to
up to
up to
up to
up to
6ES7312-5ACx2-0AB0, firmware V 1.0.0
6ES7313-1AD03-0AB0, firmware V 1.0.0
6ES7314-1AEx4-0AB0, firmware V 1.0.0
6ES7314-5AEx3-0AB0; firmware V 1.0.0
6ES7315-1AF03-0AB0, firmware V 1.0.0
6ES7315-2AFx2-0AB0,
6ES7316-1AG00-0AB0
The result is the following assignment, with reference to output parameter OUTj,
0j15:
OUTj, 0j15:
j = 15 .... 8
j = 7 .... 0
7 6 5 4 3 2 1 0 15 14 13 12 11 10 9 8
OUT_WORD
PLC S7-300, CPU Specifications CPU 312 IFM to CPU 318-2 DP
A5E00111190-01
5-3
Tips and Tricks
5-4
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Standards, Certificates and Approvals
A
Introduction
This Appendix provides the following information on the S7-300 modules and
components:
The most important standards and criteria met by S7-300 and
Approvals that have been granted for the S7-300.
IEC 1131
The S7-300 programmable controller meets the requirements and criteria to
standard IEC 1131, Part 2.
CE Symbol
Our products meet the requirements and protection guidelines of the following EC
Directives and comply with the harmonized European standards (EN) issued in the
Official Journal of the European Communities with regard to programmable
controllers:
89/336/EEC “Electromagnetic Compatibility” (EMC Directive)
73/23/EEC “Electrical Equipment Designed for Use between Certain Voltage
Limits” (Low-Voltage Directive)
The declarations of conformity are held at the address below, where they can be
obtained if and when required by the respective authorities:
Siemens Aktiengesellschaft
Automation Group
A&D AS RD 4
P.O. Box 1963
D-92209 Amberg Federal Republic of Germany
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A-1
Standards, Certificates and Approvals
EMC Guidelines
SIMATIC products are designed for industrial use.
Requirements:
Area of Application
Industry
Emitted
interference
Immunity
EN 50081-2 : 1993
EN 50082-2 : 1995
If you use the S7-300 in residential areas, you must ensure emission of radio
interference complies with Limit Class B as per EN 55011.
The following measures can be taken to achieve compliance with Limit Class B:
Install the S7-300 in an earthed control/switch cabinet
Fit filters to supply lines
UL Recognition
UL Recognition Mark
Underwriters Laboratories (UL) to
UL standard 508, Report 116536
CSA Certification
CSA-Certification-Mark
Canadian Standard Association (CSA) to
Standard C22.2 No. 142, File No. LR 48323
FM Approval
FM Approval to Factory Mutual Approval Standard Class Number 3611, Class I,
Division 2, Group A, B, C, D.
!
Warning
Personal injury or property damage can result.
In hazardous areas, personal injury or property damage can result if you withdraw
any connectors while an S7-300 is in operation.
Always isolate the S7-300 in hazardous areas before withdrawing connectors.
A-2
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Standards, Certificates and Approvals
PNO
Certificate No. As ...
CPU
DP Master
DP Slave
315-2 DP
Z00349
Z00258
316-2DP
Yes *
Yes *
318-2
Yes *
Yes *
* Number was not available at time of going to press
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A-3
Standards, Certificates and Approvals
A-4
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B
Dimensioned Drawings
Introduction
This appendix contains the dimensioned drawings of S7-300 CPUs. The
specifications in these drawings are required of you for dimensioning your S7-300
assembly. The dimensioned drawings of the other S7-300 modules and
components are contained in the Module Specifications Reference Manual.
CPU 312 IFM
Figure B-1 shows the dimensioned drawing of CPU 312IFM.
195 with front door open
130
80
23
9
25
130
125
43
120
Figure B-1
Dimensioned Drawing of the CPU 312 IFM
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B-1
Dimensioned Drawings
CPU 313/314/315/315-2DP/316-2 DP
Figure B-2 shows the dimensioned drawing of the CPU 313/314/315/315-2
DP/316-2 DP. The dimensions are the same for all the CPUs listed. Their
appearance can differ (see Chapter 1). For example, the CPU 315-2 DP has two
LED strips.
180
120
130
125
80
Figure B-2
B-2
Dimensioned Drawing of the CPU 313/314/315/315-2 DP/316-2DP
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Dimensioned Drawings
CPU 318-2
Figure B-3 shows the dimensioned drawing of the CPU 318-2, front view. The side
view is illustrated in Figure B-2
125
160
Figure B-3
Dimensioned Drawing of the CPU 318-2
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B-3
Dimensioned Drawings
CPU 314 IFM, Front View
Figure B-4 shows the dimensioned drawing of CPU 314IFM, front view. The side
view is shown in Figure B-5.
125
160
Figure B-4
B-4
Dimensioned Drawing of the CPU 314 IFM, Front View
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Dimensioned Drawings
CPU 314 IFM, Side View
Figure B-5 shows the dimensioned drawing of the CPU 314 IFM, side view.
180
130
120
Figure B-5
Dimensioned Drawing of the CPU 314 IFM, Side View
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B-5
Dimensioned Drawings
B-6
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C
List of Abbreviations
Abbreviations
Description
STL
Statement List (programming language representation in STEP 7)
CP
Communication processor
CPU
Central processing unit
DB
Data block
FB
Function block
FC
Function
FM
Function module
GD
Global data communication
IM
Interface module
IP
Intelligent I/O
LAD
Ladder logic (programming language representation in STEP 7)
FO
Fiber-optic cable
M
Chassis ground
MPI
Multipoint Interface
OB
Organization block
OP
Operator panel
PIO
Output process image
PII
Input process image
PG
Programming device
PS
Power supply
SFB
System function block
SFC
System function
SM
Signal module
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C-1
List of Abbreviations
C-2
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Glossary
Accumulator
Accumulators are registers in the CPU. They are an intermediate memory for
loading, transfer, compare, calculation and conversion operations.
Address
An address is an ID for a specific operand or operand area, for example: Input I
12.1; memory word MW 25, data block DB 3).
Analog module
Analog modules convert process values (e.g. temperature) into digital values, so
that they can be processed by the central processing unit, or convert digital
values into analog manipulated variables.
Automation system
An SIMATIC S7 automation system is a programmable logic controller.
Backplane bus
The backplane bus is a serial data bus over which the modules communicate
and over which the necessary power is supplied to the modules. The connection
between the modules is established by bus connectors.
Backup battery
The backup battery ensures that the user program in the CPU is saved in
the event of a power failure and that defined data areas, memory bits, timers and
counters are retentive.
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Glossary-1
Glossary
Backup memory
Backup memory ensures buffering of CPU memory areas
CPU, using no battery. A configurable number of timers, counters, memories
and data bytes (retentive timers, counters, memories and data bytes) is backed
up.
Bit memory
Memory bits are objects of CPU system memory, used for storing
intermediate results. They can be accessed in units of a bit, byte, word or
DWORD.
Bus
A bus is a communication medium connecting several nodes. Data transmission
can be serial or parallel across electrical conductors or fiber-optic cables.
Bus segment
A bus segment is a self-contained section of a serial bus system. Bus segments
are interconnected using repeaters.
Chassis ground
Chassis ground is the totality of all the interconnected inactive parts of a piece of
equipment on which a hazardous touch voltage cannot build up even in the event
of a fault.
Clock memories
Memories that can be used for clocking purposes in the user program (1 memory
byte).
Note
Note in the case of S7-300 CPUs that the clock memory byte is not exceeded in
the user program.
Glossary-2
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Glossary
Code block
A SIMATIC S7 code block contains part of the STEP 7 user program. (In
contrast: data block only contains data.)
Compress
The programming device online function “Compress” is used to align all valid
blocks contiguously in the RAM of the CPU at the start of the user memory. This
eliminates all gaps which arose when blocks were deleted or modified.
Communication processor
Communication processors are modules for point-to-point and bus links.
Configuration
Assignment of modules to racks/slots and (e.g. for signal modules) addresses.
Consistent data
Data whose contents are related and which should not be separated are known
as consistent data.
For example, the values of analog modules must always be handled consistently,
that is the value of an analog module must not be corrupted by reading it out at
two different times.
Counter
Counters are integrated in CPU system memory. The content of the “counter
cells” can by modified by STEP 7 instructions (e.g. count up/down).
CP
Communication processor
CPU
Central processing unit of the S7 programmable controller with open and
closed-loop control systems, memory, operating system and interface for
programming device.
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Glossary-3
Glossary
Cycle time
The cycle time represents the time a CPU requires for a single user
program execution.
Data block
Data blocks (DB) are data areas in the user program which contain user data.
Global data blocks can be accessed by all code blocks while instance data
blocks are assigned to a specific FB call.
Data, static
Static data is data which can only be used within a function block. The data is
saved in an instance data block belonging to the function block. The data stored
in the instance data block is retained until the next function block call.
Data, temporary
Temporary data is local data of a block which is stored in the L stack during
execution of a block and which is no longer available after execution.
Delay Interrupt
Interrupt, Delay
Device master file
A Device Master File (GSD -file) contains all slave-specific characteristics data.
Standard EN 50170,
Volume 2, PROFIBUS, specifies the GSD file format.
Diagnostics
System diagnostics
Diagnostic Interrupt
Modules with diagnostic function use diagnostic interrupts to report detected
errors to the CPU.
Glossary-4
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Glossary
Diagnostic buffer
The diagnostic buffer is a buffered memory area in the CPU in which diagnostic
events are stored in the order of their occurrence.
DP Master
A master which behaves in accordance with EN 50170, Part 3 is known as a
DP master.
DP Slave
A DP Slave is operated on a PROFIBUS bus system, using the
PROFIBUS-DP protocol and behaves in accordance with EN 50170, Part 3.
Equipotential bonding
Electrical connection (equipotential bonding conductor) which gives the bodies of
electrical equipment and external conducting bodies the same or approximately
the same potential, in order to prevent disturbing or dangerous voltages from
being generated between these bodies.
Error display
Error display is one of the possible responses of the operating system to runtime error. Other possible reactions are: Error response in the user
program, CPU STOP status.
Error handling via OB
If the operating system detects a specific error (e.g. an access error with STEP
7), it calls the organization block (error OB) which is provided for this event and
which specifies the subsequent behavior of the CPU.
Error response
Reaction to a runtime error. The operating system can react as follows:
Switching the PLC to STOP, call of an OB in which the user can program a
specific reaction, or display of the error.
External power supply
Power supply for signal/function modules and the connected hardware I/O.
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Glossary-5
Glossary
FB
Function block
FC
Function
Flash EPROM
FEPROMs are the same as electrically erasable EEPROMS in that they can
retain data in the event of a power failure, but they can be erased much more
quickly (FEPROM = Flash Erasable Programmable Read Only Memory). They
are used on Memory Cards.
Force
The “Force” function overwrites a variable (e.g. memory marker, output) with a
value defined by the S7 user. This variable is then write protected to prevent
modification by any other operation (including the STEP 7 user program). The
value is retained after the programming device is disconnected. The write
protection is not canceled until the “Unforce” function is called and the variable is
written again with the value defined by the user program. During commissioning,
for example, the “Force” function allows certain outputs to be set to the “ON”
state for any length of time even if the logic operations of the user program are
not fulfilled (e.g. because inputs are not wired).
Function
A function (FC) according to IEC 1131-3 is a code block containing no static data. A function allows parameters to be passed in the user program.
Functions are therefore suitable for programming complex functions, e.g.
calculations, which are repeated frequently.
Function block
A function block (FB) according to IEC 1131-3 is a code block containing
static data. An FB allows parameters to be passed in the user program.
Function blocks are therefore suitable for programming complex functions, e.g.
closed-loop controls, mode selections, which are repeated frequently.
Glossary-6
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Glossary
Functional grounding
Grounding which has the sole purpose of safeguarding the intended function of
the electrical equipment. Functional grounding short-circuits interference voltage
which would otherwise have an impermissible impact on the equipment.
GD circuit
A GD circuit encompasses a number of CPUs which exchange data by means of
global data communication. They are used as follows:
A CPU broadcasts a GD packet to the other CPUs.
One CPU sends and receives a GD packet from another CPU.
A GD circuit is identified by a GD circuit number.
GD Element
A GD element is generated by assigning shared global data. It is uniquely
identified in the global data table by its GD ID.
GD Packet
A GD packet can consist of one or multiple GD elements transmitted in a
single message frame.
Global data
Global data can be addressed from any code block (FC, FB, OB). In detail,
this refers to memory bits M, inputs I, outputs Q, timers, counters and data
blocks (DBs). Absolute or symbolic access can be made to global data.
Global data communication
Global data communication represents a method for exchanging global data
between CPUs (without CFBs).
Ground
The conductive earth whose electrical potential can be set equal to zero at any
point.
In the vicinity of grounding electrodes, the earth can have a potential different to
zero. The term “reference ground” is frequently used to describe these
circumstances.
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Glossary-7
Glossary
Ground (to)
To ground means to connect an electrically conducting component to the
grounding electrode (one or more conducting components which have a very
good contact with the earth) across a grounding system.
Instance data block
A data block, which is generated automatically, is assigned to each function
block call in the STEP 7 user program. The values of the input, output and in/out
parameters are stored in the instance data block, together with the local block
data.
Interface, multipoint
MPI
Interrupt
The CPU operating system knows 10 different priority classes that control
user program processing. Belonging to these priority classes are, for example,
e.g. process interrupts. When an interrupt is triggered, the operating system
automatically calls an assigned organization block in which the user can program
the desired response (for example in an FB).
Interrupt, Delay
The Delay Interrupt belongs to on of the priority classes for SIMATIC S7 program
processing. It is generated on expiration of a time started in the user program. A
corresponding organization block is then executed.
Interrupt, diagnostic
Diagnostic Interrupt
Interrupt, Process
Process interrupt
Interrupt, Watchdog
A watchdog interrupt is generated periodically by the CPU in configurable time
intervals. A corresponding OB is then processed.
Glossary-8
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Glossary
Interrupt, Time-Of-DayThe TOD interrupt belongs to on of the priority classes for SIMATIC S7 program
processing. It is generated according to a specified date (or daily) and
time-of-day (e.g. at 9:50, hourly, or once a minute). A corresponding organization
block is then executed.
Isolated
The reference potential of the control and load voltage circuits is isolated
galvanically in isolated I/O modules; e.g. with optocouplers, relay contacts or
transformers. I/O circuits can be connected to a common potential.alena
Local data
Data, temporary
Load memory
The load memory is part of the central processing unit. It contains objects
generated by the programming device. It is implemented either as a plug-in
memory card or a permanently integrated memory.
Main memory
Main memory is the RAM memory in the CPU, used by the processor for user
program access during program processing.
Master
Masters holding the Token can send/request data to/from other nodes (=
active nodes).
Memory card
Memory cards are card-size memory media for CPUs and CPs, equipped with RAM or FEPROM memory modules.
Module parameters
Module parameters are values which can be used to control the response of the
module. A distinction is made between static and dynamic module parameters.
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Glossary-9
Glossary
MPI
The Multipoint Interface (MPI) represents the SIMATIC S7 programming
interface, used to operate multiple nodes (Programming devices, text displays,
operator panels) on one or multiple central modules. Each station is identified by
a unique address (MPI address).
MPI address
MPI
Nesting depth
One block can be called from another by means of block calls. Nesting depth is
the number of code blocks called simultaneously.
Non-isolated
On non-isolated input/output modules, there is an electrical connection between
the reference potentials of the control and load circuits.
OB
Organization block
OB Priority
The CPU operating system differentiates between different priority classes,
e.g. cyclic program processing, process-interrupt controlled program processing.
An OB is assigned to each one of the priority classes. The S7 user can
program a reaction in these OBs. The OBs have different standard priorities
which determine the order in which they are executed or interrupted in the event
that they are activated simultaneously.
Organization block
Organization blocks (OBs) represent the interface between the operating system
of the CPU and the user program. The processing sequence of the user program
is defined in the organization blocks.
Operating mode
SIMATIC S7 automation systems know the following operating states: STOP,
STARTUP, RUN.
Glossary-10
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Glossary
Operating system of the CPU
The operating system of the CPU organizes all functions and processes of the
CPU which are not associated with a special control task.
Parameter
1. STEP 7 code block variable
2. Variable for specifying module behavior (one or several per module). Each
module is delivered with a suitable default setting, which can be changed by
configuring the parameters in STEP 7.
There are static and dynamic parameters
Parameters, dynamic
Unlike static parameters, dynamic parameters of modules can be changed
during operation by calling an SFC in the user program, for example limit values
of an analog signal input module.
Parameters, static
Unlike dynamic parameters, static parameters of modules cannot be changed by
the user program, but only by changing the configuration in STEP 7, for example
the input delay on a digital signal input module.
PG
Programming device
PLC
Programmable controller
Priority class
The S7 CPU operating system offers a maximum of 26 priority classes (or
”program execution levels”), Diverse OBs are assigned to these classes. The
priority classes determine which OBs interrupt other OBs. If a priority class
includes several OBs, they do not interrupt each other, but are executed
sequentially.
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Glossary-11
Glossary
Process image
The process image forms part of CPU system memory. The signal states of
the input modules are written to the input process image at the start of the cyclic
program. At the end of the cyclic program, the signal states in the output process
image are transferred to the output modules.
Process Interrupt
A process interrupt is generated by respective modules, triggered as a result of
specific hardware events. The process interrupt is reported to the CPU. An
assigned OB is then processed, according to the interrupt priority.
Product version
The product version differentiates between products which have the same order
number. The product version is increased with each upwardly compatible
function extension, production-related modification (use of new components) or
bug-fix.
PROFIBUS-DP
Digital, analog and intelligent modules and a wide range of field devices to EN
50170, Part 3, e.g. drives or valve blocks, are distributed local to the local
process by the PLC - across distances of up to 23 km.
The modules and field devices are connected to the programmable controller via
the PROFIBUS-DP fieldbus and addressed in the same way as centralized I/Os.
Programmable controller
Programmable controllers (PLCs) are electronic controllers whose function is
saved as a program in the control unit. The configuration and wiring of the unit
are therefore independent of the function of the control system. The
programmable controller has the structure of a computer; it consists of the CPU (central module) with its memory, I/O modules and an internal bus system.
The I/Os and the programming language are oriented to control engineering
needs.
Programming device
Programming devices are essentially personal computers which are compact,
portable and suitable for industrial applications. They are equipped with special
hardware and software for SIMATIC programmable controllers.
Glossary-12
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Glossary
RAM
A RAM (Random Access Memory, read/write) is a semiconductor chip.
Reduction factor
The reduction factor based on CPU cycle time determines the frequency of
GD package exchange.
Reference ground
Ground
Reference potential
Potential with reference to which the voltages of participating circuits are
observed and/or measured.
Restart
When a central processing unit is started up (e.g. by switching the mode selector
from STOP to RUN or by switching the power on), organization block OB 100
(complete restart) is executed before cyclic program execution commences (OB
1). On restart the input process image is read and the STEP 7- user program is
executed, starting at the first OB1 instruction.
Retentivity
A memory area is retentive if its contents are retained even after a power failure
and transition from STOP to RUN. The volatile area of memory markers, timers
and counters is reset following a power failure and a transition from the STOP
mode to the RUN mode.
The following can be made retentive:
Bit memories
S7 timers (not for CPU 312 IFM)
S7 counters
Data areas (only with memory card or integral EPROM)
Runtime error
Errors occurring during program execution in the PLC (that is, not in the
process).
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Glossary-13
Glossary
Start-up
RESTART mode is activated on a transition from STOP mode to RUN mode.
Can be triggered with the Mode Selector Switch or after Power On or with a
PG operation. With an S7-300 a complete restart is performed.
Segment
Bus segment
SFB
System function block (SFB)
SFC
System function
Signal module
Signal modules (SM) form the interface between the process and the PLC. There
are digital modules digital modules (I/O module, digital) and analog modules (I/O
module, analog).
Slave
A Slave can exchange data only on Master request.
System diagnostics
System diagnostics is a method used to recognize, evaluate and report PLC
errors. Examples of such errors: program error or module failure. System errors
can be displayed with LED indicators or in STEP 7.
System Function
This function (SFC) is
integrated in the CPU operating system. It can be called as required in the
STEP 7 user program.
System Function Block
The SFB is integrated in the CPU operating system. This function block can
be called as required in the STEP 7 user program.
Glossary-14
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Glossary
System memory
System memory is an integrated CPU RAM memory. This system memory
contains the operand areas (e.g. timers, counters, memory bits) and data areas
required internally by the operating system (e.g. communication buffer).
System state list
The system status list contains data describing the current status of an S7-300.
You can use it to gain an overview of the following at any time:
S7-300 configuration
Current CPU configuration and the configurable signal modules
The current states and sequences in the CPU and the configurable signal
modules.
STEP 7
Programming language for developing user programs for SIMATIC S7 PLCs.
Substitute value
Substitute values are configurable values which output modules transmit to the
process when the CPU switches to STOP mode.
In the event of an input access error, a substitute value can be written to the
accumulator instead of the input value which could not be read (SFC 44).
Terminating resistor
A resistance for terminating a data transmission line. Avoids reflections.
Times
Times are integrated in CPU system memory. The contents of the “timer cells”
are updated automatically by the operating system, asynchronously to the user
program. STEP 7 instructions are used to define the exact function of the timer
cells (for example on-delay) and initiate their execution (e.g. start).
Timer
Times
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Glossary-15
Glossary
Time-of-day interrupt
Interrupt, time-of-day
Token
Access right on bus
Transmission rate
Rate of data transfer (bps)
User memory
User memory contains Code/Data blocks of the user program. User
memory can be integrated in the CPU, on Memory Card or Memory modules.
The user program, however, is always processed from CPU main memory.
User program
SIMATIC differentiates between the CPU operating system and user
programs. The latter are created with the Programming Software STEP 7 in
the possible Programming languages ( FUP, STL) and stored in code blocks.
Data are stored in data blocks.
Ungrounded
Having no galvanic connection to ground
Varistor
Voltage-independent resistor
Watchdog Interrupt
Interrupt, Watchdog
Glossary-16
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Index
Communication-SFBs for configured
S7-Connections. See S7-Communication
Accumulator, Glossary-1
Compression, Glossary-3
Address, Glossary-1
Configuration, Glossary-3
Address areas, CPU 31x-2, 2-4
Configuration message frame. See in the
Analog module, Glossary-1
Internet under the URL
Approvals, A-1
http://www.ad.siemens.de/simatic-cs
Connection resources, 1-13
Consistent data, Glossary-3
B
CONT_C, CPU 314 IFM, 1-43
CONT_S, CPU 314 IFM, 1-43
Backplane bus, Glossary-1
Control elements, CPU, 1-2
Backup, 1-5
Counter, Glossary-3
Backup battery, Glossary-1
CPU 312 IFM, 1-25
Backup, 1-5
CPU 314 IFM, 1-43
Backup-memory, Glossary-2
Counter A/B, CPU 314 IFM, 1-43
BATF, 1-22
CPU
Battery, Glossary-1
clock, 1-10
Bit memory, Glossary-2
communication, 1-11
Block diagram, CPU 312 IFM, 1-36
Connection resources, 1-13
Bus, Glossary-2
control elements, 1-2
Backplane-, Glossary-1
differences between the versions, 4-6
Bus cycle times, PROFIBUS-DP-Subnet, 3-9
dimensioned drawing, B-1
Bus segment, Glossary-2
display elements, 1-2
BUSF, 2-6, 2-19
fault displays, 1-3
Mode selector switch, 1-4
operating system, Glossary-11
C
runtime meter, 1-10
Calculation, response time, 3-3
status displays, 1-3
Calculation example, interrupt response time,
testing functions, 1-19
3-16
CPU 312 IFM, 1-25
CE, symbol, A-1
Block diagram, 1-36
Chassis ground, Glossary-2
connecting the power supply, 1-35
Clock, CPU, 1-10
Grounded assembly, 1-34
Code block, Glossary-3
integrated functions, 1-25
Communication
Short–circuit reaction, 1-35
CPU, 1-11
technical specifications, 1-28
CPU 318-2, 1-69
Wiring diagram, 1-34, 1-56
Global Data-, 1-12
CPU 313, 1-37
PG-/OP-, 1-12
technical specifications, 1-37
Communication -SFCs for not configured S7CPU 314, 1-40
connections. See S7-Basic-Communication
technical specifications, 1-40
Communication via MPI, cycle load, 3-2
A
PLC S7-300, CPU Specifications CPU 312 IFM to CPU 318-2 DP
A5E00111190-01
Index-1
Index
CPU 314 IFM, 1-43
basic circuit diagrams, 1-57
integrated functions, 1-43
technical specifications, 1-47
CPU 315, 1-60
2 DP, 1-66
technical specifications, 1-60
CPU 315-2 DP, 1-63
See also CPU 31x-2
DP-Master, 2-5
technical data, 1-63
CPU 316-2 DP, 1-66
See also CPU 31x-2
CPU 318-2, 1-69
See also CPU 31x-2
Communication, 1-69
Differences to other CPUs of the 300
family, 4-2
technical data, 1-71
CPU 31x-2
Bus Interruption, 2-11, 2-23, 2-33
Diagnostic addresses for PROFIBUS, 2-10,
2-22
Direct Data Exchange, 2-32
DP-Address areas, 2-4
DP-Master
Diagnostics with LEDs, 2-6
Diagnostics with STEP 7, 2-7
DP-Slave, 2-13
Diagnostics, 2-18
Diagnostics with LEDs, 2-19
Diagnostics with STEP 7, 2-19
Operating State Transition, 2-11, 2-23, 2-33
Transfer Memory, 2-14
Cross–traffic. See Direct Data Exchange
CSA, A-2
Cycle control, processing time, 3-6
Cycle extension, through interrupts, 3-10
Cycle load, communication via MPI, 3-2
Cycle time, 3-2, Glossary-4
calculation example, 3-10
extending, 3-3
D
Data
consistent, Glossary-3
statistic, Glossary-4
temporary, Glossary-4
Data block, Glossary-4
Data Exchange, direct, 2-32
Index-2
Delay, of inputs / outputs, 3-8
Delay Interrupt, Glossary-8
Delay interrupt, reproducibility, 3-17
Device–specific Diagnostics, CPU 31x-2
operating as DP-Slave, 2-29
Device-Master-File, Glossary-4
Diagnosis, Direct communication, 2-33
Diagnostic addresses, CPU 31x-2, 2-10, 2-22
Diagnostic buffer, Glossary-5
Diagnostic Interrupt, Glossary-4
CPU 31x-2 operating as DP-Slave, 2-30
Diagnostic interrupt response time, of the
CPUs, 3-15
Diagnostics
CPU 31x-2 operating as DP-Slave, 2-18
device–specific, CPU 31x-2 operating as
-Slave, 2-29
Id related, CPU 315-2 DP operating as
DP-Slave, 2-28
LED-Display, 1-22
System-, Glossary-14
with STEP 7, 1-22
Differences, 318-2 to other CPUs, 4-2
Dimensioned drawing, CPU, B-1
Direct communication, Diagnosis, 2-33
Direct Data Exchange, CPU 31x-2, 2-32
Display elements, CPU, 1-2
DP-Master, Glossary-5
CPU 31x-2, 2-5
Diagnostics with LEDs, 2-6
Diagnostics with STEP 7, 2-7
DP-Slave, Glossary-5
CPU 31x-2, 2-13
Diagnostics with LEDs, 2-19
Diagnostics with STEP 7, 2-19
DP-Slave-Diagnostics, Structure, 2-24
E
EMC-Guideline, A-2
Equipotential bonding, Glossary-5
Error display, Glossary-5
Error response, Glossary-5
Execution time, user program, 3-2
F
Fault displays, CPU, 1-3
FM, approval, A-2
Force, Glossary-6
PLC S7-300, CPU Specifications CPU 312 IFM to CPU 318-2 DP
A5E00111190-01
Index
Forcing, 1-20
Frequency meter
CPU 312 IFM, 1-25
CPU 314 IFM, 1-43
Function, FC, Glossary-6
Function block, FB, Glossary-6
Functional grounding, Glossary-7
G
Isolated, Glossary-9
L
Load memory, Glossary-9
Local data, Glossary-9
M
Main memory, Glossary-9
Manufacturer ID, CPU 31x-2 operating as
DP-Slave, 2-27
Master-PROFIBUS-Address, 2-27
Memory
Backup, Glossary-2
Main-, Glossary-9
user, Glossary-16
memory
Load-, Glossary-9
System-, Glossary-15
Memory card, 1-6, Glossary-9
purpose, 1-6
Mode selector. See Mode selector switch
Mode selector switch, 1-4
Module parameters, Glossary-9
MPI, Glossary-10
I
MPI-interface, 1-7
ID related diagnostics, CPU 31x-2 operating as MRES mode, 1-4
DP-Slave, 2-28
IEC 1131, A-1
Inputs, delay time, 3-8
N
Inputs-/Outputs
Nesting depth, Glossary-10
integrated, CPU 312 IFM, 1-25
Non–isolated, Glossary-10
integrated, CPU 314 IFM, 1-43
Instance data block, Glossary-8
Integrated functions, CPU 314 IFM, 1-43
O
Integrated Inputs-/Outputs
of CPU 314 IFM, 1-43
OB, Glossary-10
of the CPU 312 IFM, 1-25
OB 40, Start information for integrated
Interface, CPU, 1-7
inputs-/outputs, 1-26, 1-44
Interrupt, Glossary-8
OB-Priority, Glossary-10
Delay-, Glossary-8
Operating mode, Glossary-10
Diagnostic-, Glossary-4
Operating system
Process-, Glossary-12
of the CPU, Glossary-11
Time–Of–Day-, Glossary-9
processing time, 3-6
Watchdog-, Glossary-8
Organization block, Glossary-10
Interrupt response time, 3-14
Outputs, delay time, 3-8
calculation example, 3-16
Interrupts
CPU 315-2 DP operating as DP-Slave, 2-31
cycle extension, 3-10
GD-Circuit
Receive Conditions, 1-18
Reduction ratio, 1-18
Send Conditions, 1-18
GD-circuit, Glossary-7
GD-Element, Glossary-7
GD-Packet, Glossary-7
Global data, Glossary-7
send cycles, 1-18
Global Data Communication, 1-12
Ground, Glossary-7
Ground (to), Glossary-8
Grounded assembly, CPU 312 IFM, 1-34
GSD-File, Glossary-4
PLC S7-300, CPU Specifications CPU 312 IFM to CPU 318-2 DP
A5E00111190-01
Index-3
Index
Runtime meter, CPU, 1-10
P
Parameter, Glossary-11
Parameter assignment message frame. See in
the Internet under the URL
http://www.ad.siemens.de/simatic-cs
Parameters, Modules-, Glossary-9
PG-/OP-Communication, 1-12
PNO, certificate, A-3
Positioning, CPU 314 IFM, 1-43
Priority, OB, Glossary-10
Priority class, Glossary-11
Process image, Glossary-12
Process Image -Update, Processing time, 3-6
Process Interrupt, Glossary-12
Process interrupt, CPU 312 IFM, 1-25, 1-43
Process interrupt processing, 3-15
Process interrupt response time
of the CPUs, 3-14
of the signal modules, 3-15
Processing time
Process Image - Update, 3-6
cycle control, 3-6
operating system, 3-6
user program, 3-7
Product version, Glossary-12
PROFIBUS-DP, Glossary-12
PROFIBUS-DP-Interface, 1-7
PROFIBUS-DP-Subnet, Bus cycle times, 3-9
PULSEGEN, CPU 314 IFM, 1-43
R
Receive Conditions, GD-Circuit, 1-18
Rechargeable battery, Backup, 1-5
Reduction factor, Glossary-13
Reduction ratio, GD-Circuit, 1-18
Reproducibility, delay/watchdog interrupts,
3-17
Reset, with mode selector, 1-4
Response time, 3-3
calculation, 3-3
calculation example, 3-10
calculation of, 3-6
Interrupt-, 3-14
longest, 3-5
shortest, 3-4
Restart, Glossary-13
Retentivity, Glossary-13
Routing of PG-Functions, 1-12
RUN mode, 1-4
Runtime error, Glossary-13
Index-4
S
S7-Basic-Communication, 1-12
S7-Timer, Update, 3-7
Send Conditions, GD-Circuit, 1-18
Send cycles, for global data, 1-18
SF, 1-22
Short–circuit reaction, CPU 312 IFM, 1-35
Signal module, Glossary-14
SINEC L2-DP. See PROFIBUS DP
Standards, A-1
Start information for integrated inputs-/outputs,
OB 40, 1-26, 1-44
Start–up, Glossary-14
Station status 1 to 3, 2-25
Status displays, CPU, 1-3
STOP, 1-4
LED, 1-22
Substitute value, Glossary-15
System diagnostics, Glossary-14
System memory, Glossary-15
System-Function, SFC, Glossary-14
System-Function Block, SFB, Glossary-14
T
Terminating resistor, Glossary-15
Testing functions, 1-19
Times, Glossary-15
TOD Interrupt, Glossary-9
Transfer Memory
CPU 31x-2, 2-14
for Data transfer, 2-14
U
UL, A-2
Ungrounded, Glossary-16
Update, of the S7-Timer, 3-7
User memory, Glossary-16
User program, Glossary-16
processing time, 3-7
User program execution time, 3-2
V
Version. See Product version
PLC S7-300, CPU Specifications CPU 312 IFM to CPU 318-2 DP
A5E00111190-01
Index
W
Watchdog interrupt, reproducibility, 3-17
Watchdog Interrupt, Glossary-8
PLC S7-300, CPU Specifications CPU 312 IFM to CPU 318-2 DP
A5E00111190-01
Index-5
Index
Index-6
PLC S7-300, CPU Specifications CPU 312 IFM to CPU 318-2 DP
A5E00111190-01