Siemens SIMATIC CP 541 User manual

Preface, Contents
User Information
Overview 1
Communication Modes 2
Installing and Connecting the
CP 541 3
Assigning Parameters to the
CP 541 4
CP 541 with S5-95F/S5-115F 5
Diagnostics and Error Handling 6
Appendices
Technical Data A
Optimizing SINEC L2 B
Parameters of DB1 C
DP Parameter Assignment
Message D
DP Configuring Message E
Definitions for the DP Master F
Service Access Point (SAP) and
PROFIBUS Services G
Program Examples H
Glossary, Index
Edition 1
EWA 4NEB 812 6188-02
CP 541
Communications Processor
Manual
SIMATIC

Comm nications Processor CP 541
This manual contains notices which you should observe to ensure your own personal safety, as
well as to protect the product and connected equipment. These notices are highlighted in the
manual by a warning triangle and are marked as follows according to the level of danger:
!Danger
indicates that death, severe personal injury or substantial property damage will result if proper
precautions are not taken.
!Warning
indicates that death, severe personal injury or substantial property damage can result if proper
precautions are not taken.
!Caution
indicates
that minor personal injury or property damage can result if proper precautions are not taken.
Note
draws
your attention to particularly important information on the product, handling the product, or
to a particular part of the documentation.
The device/system may only be set up and operated in conjunction with this manual.
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.
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.
SIMATICand SINECare registered trademarks of SIEMENS AG.
Third
parties using for their own purposes any other names in this document which refer to trade -
marks might infringe upon the rights of the trademark owners.
We have checked the contents of this manual for agreement with the
hardware and software described. Since deviations cannot be precluded
entirely, we cannot guarantee full agreement. However, the data in this
manual
are reviewed regularly and any necessary corrections included in
subsequent editions. Suggestions for improvement are welcomed.
   Copyright  Siemens AG 1996 All rights reserved
The reproduction, transmission or use of this document or its contents is
not permitted without express written authority . Of fenders will be liable
for damages. All rights, including rights created by patent grant or
registration of a utility model or design, are reserved.
Siemens AG
Automation Group
Industrial Automation Systems
P.O. Box 4848, D-90327 Nuremberg

Siemens AG 1996
Technical data subject to change.
Siemens Aktiengesellschaft Order No. 6ES5 998-1DL21
Safety Guidelines
Qualified Personnel
Correct Usage
Trademarks

iii
Communications Processor CP 541
EW A 4NEB 812 6188-02
Preface
The information in this Manual allows you
 to connect a programmable controller of the SIMA TIC S5 family to the
CP 541;
 to connect a programmable controller of the SIMA TIC S5 family via the
CP 541 to SINEC L2;
 to integrate a programmable controller of the SIMA TIC S5 family via the
CP 541 as a DP slave in SINEC L2-DP;
 to connect the CP 541 and start it.
This Manual is intended for readers wishing to integrate a programmable
controller of the SIMA TIC S5 family via the CP 541 in SINEC L2. It is as -
sumed that you already have experience in or knowledge of working with
programmable controllers of the SIMA TIC S5 family and SINEC L2.
This Manual applies to:
Device Order No. Fr om Revision Level
CP 541 6ES5 541-8AA1 1 01
Connecting cable 1 m 6ES5 735-8BB00 –
Connecting cable
2.5 m 6ES5 735-8BC50
–
This Manual contains a description of all functions of the CP 541 at the time
of publication of the Manual. We reserve the right to describe modifications
to the functions in a product information.
Purpose
Audience
Scope of this
Manual

iv Communications
Processor CP 541
EW A 4NEB 812 6188-02
This CP 541 Manual describes the SINEC L2 interfacing of the CP 541.
The assigning of parameters to the programmable controller connected to the
CP 541 as a SINEC L1 slave can be found in the relevant manual.
The description of SINEC L2-DP and a DP master , such as the IM 308-C
master interface module, are not part of this Manual. Further information on
this topic can be found in the manual: ET 200 Distributed I/O System .
Detailed information on SINEC L1 can be found in the manual: SINEC L1
Local Ar ea Network .
T
o facilitate rapid access to special information, the Manual contains the fol -
lowing aids:
 Given at the beginning of the Manual is a full, general table of contents, a
list of figures and a list of tables contained in the entire Manual.
 In the chapters, the left column of each page provides a summary of the
contents of the section.
 The appendices are followed by a glossary in which the important techni -
cal terms used in the Manual are defined.
 Given at the end of the Manual is a detailed index which allows rapid
access to the desired information.
The CP 541 is based on PROFIBUS Standard DIN 19245 and PROFIBUS DP
Standard DIN E 19245, Part 3.
In the event of queries on the CP 541, please consult:
Hotline SIMA TIC
Nuremberg
T
el: 0911/895-7000
Fax: [phone]
In the event of queries or remarks relating to the Manual, please fill out the
correction sheet and return it to us. You will find it at the end of the Manual.
Other Pertinent
Manuals
Structure of this
Manual
Standards
Queries
Preface

v
Communications Processor CP 541
EW A 4NEB 812 6188-02
Contents
1 Overview 1-1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.1 Performance Features of the CP 541 1-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.2 The CP 541 in the SIMA TIC Environment 1-4. . . . . . . . . . . . . . . . . . . . . . . . . . .
1.3 View of the CP 541 1-5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.4 Suitable Programmable Controllers for the CP 541 1-7. . . . . . . . . . . . . . . . . . .
2 Communication Modes 2-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.1 PLC-PLC Connection 2-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.2 DP Connection 2-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.3 Broadcast via FDL Connection 2-4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3 Installing and Connecting the CP 541 3-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.1 Installing the CP 541 3-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.2 Connecting the CP 541 3-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.3 Starting up the CP 541 3-5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.4 Operating States of the CP 541 3-6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.4.1 POWER ON 3-7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.4.2 STOP State 3-8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.4.3 START 3-9 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.4.4 RUN State 3-10. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4 Assigning Parameters to the CP 541 for the Connections 4-1. . . . . . . . . . . . . . . . . .
4.1 Configuring a PLC-PLC Connection 4-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4.2 Configuring the Broadcast Mode 4-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4.3 Configuring a DP Connection 4-4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5CP 541 with S5-95F/S5-1 15F 5-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5.1 Communication Modes 5-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5.1.1 Safety-Related PLC-PLC Connection 5-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5.1.2 Safety-Related Broadcast via FDL 5-4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5.2 Configuring Connections 5-5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5.2.1 Configuring a Safety-Related PLC-PLC Connection 5-6. . . . . . . . . . . . . . . . . .
5.2.2 Configuring a Non-Safety-Related PLC-PLC Connection 5-7. . . . . . . . . . . . . .
5.2.3 Configuring the Safety-Related Broadcast Mode 5-8. . . . . . . . . . . . . . . . . . . . .
5.3 Safety Times 5-9. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5.3.1 Local Cycle T ime for CP 541 5-10. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5.3.2 Calculating the Local Cycle T ime 5-11. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5.3.3 Condition for the SINEC L1 Safety T ime for Receiving 5-14. . . . . . . . . . . . . . . .

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Communications Processor CP 541
EW A 4NEB 812 6188-02
5.3.4 Setting the Safety T imes 5-16. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5.3.5 Example for Calculating the Local Cycle T imes 5-18. . . . . . . . . . . . . . . . . . . . . .
5.3.6 Example of V erification of Safety T imes 5-22. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5.4 Redundant SINEC L2 Configuration 5-24. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
6 Diagnostics and Error Handling 6-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
6.1 Local Diagnostics with LEDs 6-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
6.2 Diagnostics Block 6-4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
6.2.1 Structure of the Diagnostics Block 6-5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
6.2.2 DB1 Errors 6-6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
6.2.3 SINEC L2 Bus Errors 6-9. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
6.2.4 SINEC L1 Message Errors 6-10. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
6.2.5 Internal Errors 6-12. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
6.3 DP Diagnostic Message Using the Example of an
IM 308-C with FB IM308C 6-13. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
6.3.1 Structure of the Diagnosis 6-15. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
6.3.2 Contents of the DP Standard Section 6-16. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
6.3.3 Device-Related Diagnosis 6-18. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
6.3.4 Example of a Diagnostic Call with IM308-C and FB IM308C 6-19. . . . . . . . . . .
6.4 DP Diagnosis in the Programmable Controller 6-20. . . . . . . . . . . . . . . . . . . . . . .
A Technical Data A-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
B Optimizing SINEC L2 B-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
C Parameters of DB1 C-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
C.1 Structure of DB1 C-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
C.2 Syntax of DB1 C-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
C.3 General SINEC L2 Parameters - block Identifier SL2 C-4. . . . . . . . . . . . . . . . .
C.4 CP 541-Specific Parameters - Block ID COM C-8. . . . . . . . . . . . . . . . . . . . . . . .
C.5 DP Parameters – Block ID ”DPS” C-10. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
C.6 Default DB1 C-12. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
C.7 Calculating the T oken Rotation T ime C-14. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
C.8 Example of Calculation of the T oken Rotation T ime C-16. . . . . . . . . . . . . . . . . . .
DDP Parameter Assignment Message D-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
E DP Configuring Message E-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
F Definitions for the DP Master F-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
G Service Access Point (SAP) and PROFIBUS Services G-1. . . . . . . . . . . . . . . . . . . . . .
H Program Examples H-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
H.1 PLC-PLC Connection H-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
H.2 DP Connection H-8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
H.3 Safety-Related PLC-PLC Connection: S5-95F - S5-1 15F H-12. . . . . . . . . . . . . .
Contents

vii
Communications Processor CP 541
EW A 4NEB 812 6188-02
Glossary
Index
Figures
1-1 CP
541 in the SIMA TIC Environment 1-4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1-2 View of the CP 541 1-5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2-1 Address Conversion for PLC-PLC Connection 2-2. . . . . . . . . . . . . . . . . . . . . . .
2-2 Address Conversion for DP Connection 2-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2-3 Address Conversion for Broadcast 2-4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3-1 Isolation of Terminals 3-4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5-1 Address Conversion for the Safety-Related PLC-PLC Connection 5-3. . . . . .
5-2 Address Conversion for Broadcast 5-4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5-3 Graphic Representation of Cycle T imes 5-14. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5-4 Configuration Example for Calculating the Local Cycle T imes 5-18. . . . . . . . . .
5-5 Schematic Configuration of SINEC L2 in Redundant Configuration 5-24. . . . .
6-1 Example of Configuration 6-19. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
A-1 CP 541 Dimension Drawing A-4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
C-1 Structure of DB1 C-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
C-2 Syntax of DB1 C-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
H-1 Configuration for a PLC-PLC Connection H-2. . . . . . . . . . . . . . . . . . . . . . . . . . . .
H-2 Configuration of a DP Connection H-8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
H-3 Configuration for a Safety-Related PLC-PLC Connection H-12. . . . . . . . . . . . . .
Contents

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Communications Processor CP 541
EW A 4NEB 812 6188-02
Tables
1-1 LED
Indicators of the CP 541 1-6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1-2 Mode Switch of the CP 541 1-6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1-3 Connectors and T erminals of the CP 541 1-6. . . . . . . . . . . . . . . . . . . . . . . . . . .
1-4 Connectable Programmable Controllers and Communication Modes;
both Stations Connected to SINEC L2 via CP 541 1-7. . . . . . . . . . . . . . . . . . . .
1-5 Connectable Programmable Controllers and Communication Modes;
one Station Connected to SINEC L2 via CP 541 1-8. . . . . . . . . . . . . . . . . . . . .
3-1 Cable for Connecting the PLC and the CP 541 3-3. . . . . . . . . . . . . . . . . . . . . . .
3-2 Components for SINEC L2 3-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5-1 Supported Failsafe Programmable Controllers 5-1. . . . . . . . . . . . . . . . . . . . . .
6-1 Indications of the RUN LED 6-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
6-2 Assignments of the Data W ords in DB2 6-5. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
6-3 Significance of DW0 in DB2 6-5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
6-4 DB1 Error Codes 6-6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
6-5 SINEC L2 Bus Errors 6-9. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
6-6 SINEC L1 Message Errors 6-10. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
6-7 Structure of the Diagnostic Message 6-15. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
6-8 Structure of Station Status 1 (Byte 0) 6-16. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
6-9 Structure of Station Status 2 (Byte 1) 6-16. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
6-10 Structure of Bytes 6 and 7 of the Diagnostic Message 6-18. . . . . . . . . . . . . . . .
6-11 Structure of the Device-Related Diagnosis,
Byte 7 of the Diagnostic Message
6-18. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
C-1 SL2 Parameters C-4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
C-2 Necessary Basic Parameters According to Station Status (ST A) C-5. . . . . . .
C-3 DP/FMS Bus Profile (in Bit T imes) C-6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
C-4 PROFIBUS-DP Bus Profile (in Bit T imes) C-6. . . . . . . . . . . . . . . . . . . . . . . . . . .
C-5 DP Bus Profile for IM 308-B (in Bit T imes) C-6. . . . . . . . . . . . . . . . . . . . . . . . . .
C-6 User-Defined Bus Profile (in Bit T imes) C-7. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
C-7 COM Parameters C-8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
C-8 DPS Parameters C-10. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
C-9 Default V alues in DB1 C-13. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
C-10 Basic Load on SINEC L2 (in Bit T imes) C-15. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
D-1 Structure of the DP Standard Section of the
Parameter Assignment Message D-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
D-2 Structure of the Station Status in the Parameter Assignment Message D-2.
E-1 Structure of Identifier Byte in Configuring Message E-1. . . . . . . . . . . . . . . . . .
G-1 Meanings of Service Access Points (SAPs) G-1. . . . . . . . . . . . . . . . . . . . . . . . .
G-2 PROFIBUS Services G-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Contents

1-1
Communications Processor CP 541
EW A 4NEB 812 6188-02
Overview
The CP 541 provides a link between programmable controllers of the
SIMA TIC S5 family via SINEC L2 and other programmable controllers.
Given in this chapter is a summary covering the application of the CP 541
and its characteristics.
The following situation is covered by this Manual:
 The programmable controller connected to the PG/PLC port is referred to
as a connected programmable controller .
 For working with the CP 541, it is not important to know which stations
are connected to SINEC L2. W e therefore do not refer to programmable
controllers on SINEC L2, but generally to SINEC L2.
Section Contents Page
1.1 Performance Features of the CP 541 1-2
1.2 The CP 541 in the SIMATIC Environment 1-4
1.3 View of the CP 541 1-5
1.4 Suitable Programmable Controllers for the CP 541 1-7
Introduction
Definitions
Summary of this
Chapter
1

1-2 Communications
Processor CP 541
EW A 4NEB 812 6188-02
1.1 Performance Features of the CP 541
The significant performance features of the CP 541 are described in the fol -
lowing.
Y
ou can use the CP 541 for the following fields of application:
 Subsequent networking of installed programmable controllers of the SI -
MA
TIC S5 family
 Substitute for SINEC L1
 For connecting failsafe programmable controllers of the SIMA TIC S5
family via SINEC L2
Y ou can establish the following communication links via the CP 541:
 PLC-PLC link
Broadcast
 DP link for operating programmable controllers of the SIMA TIC S5 fam -
ily as a DP slave with any DP master in SIMA TIC S5 and S7/M7 or with
any DP master from another manufacturer .
In contrast to other DP slaves, the CP 541 exhibits a minimum cycle time
of 10 ms. It supports PROFIBUS profiles DP/FMS and User Defined at
transmission rates of up to 1.5 Mbps and PROFIBUS-DP or DP for
IM 308-B at up to 187.5 Kbps.
 Safety-related data traf fic between failsafe programmable controllers of
the SIMA TIC S5 family
The communication concept has been tested for freedom from reaction of
the safety-related SINEC L1 communications between failsafe program -
mable controllers. The CP 541 is a non-safety-related module and can
therefore be operated without a special test. However , the general condi -
tions for special testing of the programmable controller must be observed.
Introduction
Fields of
Application
Communication
Modes
Overview

1-3
Communications Processor CP 541
EW A 4NEB 812 6188-02
The CP 541 of fers you various advantages.
 It allows parallel operation of the various communication modes.
 It supports the safety-related connection of failsafe programmable con -
trollers of the SIMA TIC S5 family via SINEC L2.
 It can be used with most SIMA TIC S5 systems.
 It allows simple retrofitting on existing systems.
 It is connected to the programmer interface of the programmable control -
ler with a simple plug-in cable; no bus terminal is needed.
 Simple parameter assignment
 Freedom from maintenance
 It is secured directly on the standard rail; no slot in the connected pro -
grammable controller is needed.
Advantages for the
User
Overview

1-4 Communications
Processor CP 541
EW A 4NEB 812 6188-02
1.2 The CP 541 in the SIMATIC Environment
Figure 1-1 shows the incorporation of the CP 541 in the SIMA TIC environ -
ment.
On account of the various communication modes, possible combinations of
communication modes and number of connectable programmable controllers,
Figure 1-1 is merely an example.
SINEC L2
S5-100U
S5-115FS5-95F CP 541 CP 541
S5-115U CP 5430 CP 541
Figure 1-1 CP 541 in the SIMATIC Environment
For the connected programmable controller , the CP 541 emulates a fully con -
figured SINEC L1 bus. The connected programmable controller is an
L1 slave.
Incorporation in
SIMATIC
CP 541 Emulates
SINEC L1
Overview

1-5
Communications Processor CP 541
EW A 4NEB 812 6188-02
1.3 View of the CP 541
Figure 1-2 is a view of the CP 541
6ES5 541-8AA1 1
123456
L+
M
24 V DC
SINEC L2
– AG/AG
– DP
PG/AG
RUN BF L2
ERR SIMATIC S5
CP 541
RUN
STOP
0
Mount for
standard rail
Cover for
cable inlet
LED indicator
Connector for SINEC L2
T erminals for
24 V DC
power supply
Connector for PG/PLC
Mode switch
Figure 1-2 View of the CP 541
View
Overview

1-6 Communications
Processor CP 541
EW A 4NEB 812 6188-02
The CP 541 has three LEDs to indicate the operational state of the CP 541
and any errors.
Table 1-1 LED Indicators of the CP 541
LED Color Position Meaning
RUN Green Left Operational state
ERR Red Middle Error in CP 541 or at PG/PLC connection
BF L2 Red Right Error at L2 connection or SINEC L2 not
yet activated
The CP 541 has a mode switch with three settings. The meanings of the dif -
ferent settings are given in T able 1-2.
Table 1-2 Mode Switch of the CP 541
Switch Setting Meaning
RUN The CP 541 is in normal operation. Data will be ex -
changed between the PLC and SINEC L2.
STOP Y ou can assign parameters to the CP 541 with a PG
and read out the diagnostics block.
0 The CP 541 is switched of f.
The CP 541 has various connectors and terminals; these are listed in
T able 1-3.
Table 1-3 Connectors and Terminals of the CP 541
Designation Type Meaning
PG/PLC 15-pin sub. D female with
slide latch
For PG cable or connecting
cable to PLC
SINEC L2
- PLC-PLC
- DP
9-pin sub. D female with
screw-type connection
For L2 bus connector
L+
M
Screw terminals 24 V DC power supply
LED Indicators
Mode Switch
Connectors and
Terminals
Overview

1-7
Communications Processor CP 541
EW A 4NEB 812 6188-02
1.4 Suitable Programmable Controllers for the CP 541
The summaries in T ables 1-4 and 1-5 indicate the programmable controllers
of the SIMA TIC S5 family which you can connect to the CP 541.
Also given are the communication modes you can install by means of CP 541
via SINEC L2 and the appropriate programmable controllers.
When both SINEC L2 stations are connected via CP 541, T able 1-4 shows
the possible communication modes in relation to the appropriate program -
mable controllers of the SIMA TIC S5 family .
Table 1-4 Connectable Programmable Controllers and Communication Modes; both Stations Connected to SI-
NEC L2 via CP 541
SINEC L2
CP 541 with
SINEC
L2
partner
S5-90U
CP 530 in
p
Connected
PLC
S5-95F S5-115F
S5-90U
S5-95U
S5-100U
S5-115U
S5-115H
S5-135U
S5-155U
S5-155H
S5-115H
S5-95F
PLC-PLC and safety-related
PLC-PLC
S5-115F
PLC-PLC
Broadcast and safety-related
broadcast
To
CP
541
S5-90U
S5-95U
S5-100U
S5-115U PLC-PLC
PLC-PLC
Broadcast PLC-PLC
541
CP
530
in
S5-115H
S5-135U
S5-155U
S5-155H
PLC-PLC
Broadcast
S5-115H PLC-PLC
Introduction
Both
Stations via
CP 541
Overview

1-8 Communications
Processor CP 541
EW A 4NEB 812 6188-02
When one SINEC L2 station is connected via CP 541, T able 1-5 shows the
possible communication modes in relation to the appropriate programmable
controllers of the SIMA TIC S5 family .
Table 1-5 Connectable Programmable Controllers and Communication Modes; one Station Connected to
SINEC L2 via CP 541
SINEC L2
partner S5-95U
IM 308B
IM308C CP
5430
CP 5431
CP 342-5
DP CP
5412
A2
partner
Connected
PLC
S5-95U
and
SINEC L2
connec-
tion
S5-95U as
DP master
S5-115U
S5-115H
S5-135U
S5-155U
S5-155H
S5-115U
S5-115H
S5-135U
S5-155U
S5-155H
S7-300 PG
S5-95F
S5-115F
To
CP
S5-90U
S5-95U
S5-100U
S5-115U PLC-PLC
Broadcast
DP
PLC-PLC
DP
Broadcast
DP
DP
Broadcast
CP
541 CP
530
in
S5-115H
S5-135U
S5-155U
S5-155H
DP
Broadcast
DP
S5-115H PLC-PLC PLC-PLC
DP DP
The abbreviations in T ables 1-4 and 1-5 have the following meanings:
Designation Meaning
PLC-PLC (see Section 2.1) The PLC-PLC connection serves to transmit messages between two
programmable controllers.
DP (see Section 2.2) The DP connection serves to exchange messages with a higher -
level DP master .
Broadcast (see Section 2.3) Y ou use a broadcast to transmit messages to all stations connected
to SINEC L2.
Safety-related PLC-PLC (see
Section 5.1.1)
The safety-related PLC-PLC connection serves to transmit safety-
related messages between two failsafe programmable controllers.
Safety-related broadcast (see
Section 5.1.2)
Y ou use safety-related broadcast to transmit safety-related mes -
sages to all stations connected to SINEC L2.
One Station via
CP 541
Meanings of
Designations
Overview

2-1
Communications Processor CP 541
EW A 4NEB 812 6188-02
Communication Modes
This chapter provides an overview of the communication modes you can use
via the CP 541.
The following two declarations apply to the entire Manual. Y ou require these
declarations to facilitate understanding of the various communication modes.
 Node address
The node address is the address with which the programmable controller
connected to the CP 541 is accessed by it.
 Station number
The station number is the number which distinguishes the various stations
on the SINEC L2. Each station number is uniquely assigned to a station.
The CP 541 always provides a positive acknowledgment to all messages it
receives from the programmable controller .
Section Contents Page
2.1 PLC-PLC Connection 2-2
2.2 DP Connection 2-3
2.3 Broadcast via FDL Connection 2-4
Introduction
Declarations
Acknowledgment
Summary of this
Chapter
2

2-2 Communications
Processor CP 541
EW A 4NEB 812 6188-02
2.1 PLC-PLC Connection
The PLC-PLC connection serves for message-oriented communication be -
tween two programmable controllers, without a detour via an additional sta -
tion.
Each message of the non-safety-related PLC-PLC connection can contain up
to 64 bytes of data.
If you install a PLC-PLC connection, you must parameterize the CP 541 as
an active station.
The node address specified in the programmable controller is converted by
the CP 541 to the station number and vice versa. Node address 1 is converted
to station number 1, node address 2 to station number 2, etc.
PLC CP
541
1
30
3
2
1 3032
SINEC L2
Figure 2-1 Address Conversion for PLC-PLC Connection
Node addresses 1 to 30 are available in the connected programmable control -
ler for the PLC-PLC connection.
Introduction
Message Length
Parameter
Assignment
Address
Conversion
Address Range
Communication Modes

2-3
Communications Processor CP 541
EW A 4NEB 812 6188-02
2.2 DP Connection
The DP connection is data-oriented non-safety-related communication be -
tween a DP master and a DP slave.
The DP connection can contain up to 16 words of data in each direction.
Y ou install the DP connection in the connected programmable controller as a
connection with node address 0 (see Section 4.3).
Node address 0 sent by the connected programmable controller is converted
to the DP master station number by the CP 541.
PLC CP
541
0
DP
master
SINEC L2
Figure 2-2 Address Conversion for DP Connection
The CP 541 monitors the DP connection to the programmable controller .
Monitoring is active as soon as the CP 541 is accepted in the DP cycle and
the programmable controller has sent the first DP message.
When writing the user program in the programmable controller , ensure that
cyclic DP data are presented within the response monitoring time (DPWD,
see Appendix C.5).
When the CP 541 no longer receives DP messages from the programmable
controller , it emits a diagnosis to the DP master .
As soon as the CP 541 is accepted in the DP cycle and the DP watchdog is
activated, the CP 541 monitors the connection to the DP master .
If the DP connection to the DP master fails, the CP 541 informs the program -
mable controller (see Section 6.4).
W ith the S5-1 15F , you can install either the DP connection or a non-safety-
related PLC-PLC connection. Both connections are not simultaneously pos -
sible because they both use node address 0.
Introduction
Message Length
Parameter
Assignment
Address
Conversion
Monitoring of the
Connected PLC
DP Master
Monitoring
Note Relating to
the S5-1 15F
Communication Modes

2-4 Communications
Processor CP 541
EW A 4NEB 812 6188-02
2.3 Broadcast via FDL Connection
The broadcast serves to transmit messages to all L2 stations which monitor
the SINEC L2 via FDL and the set SAP ( s ervice a ccess p oint), and use the
SDN service.
Each broadcast message can contain up to 64 bytes of data.
The CP 541 converts a broadcast message from the connected programmable
controller to a multicast message on SINEC L2. A service access point (SAP)
is used for this conversion.
SAP
The CP 541 uses the default SAP 52 for broadcast. Y ou can change the
SAP with parameter BSAP in frame COM of DB1.
The SAP number must be identical for all participating stations.
SDN
SDN ( s end d ata with n o acknowledge) of the PROFIBUS protocol is used
for the broadcast.
Y ou send the broadcast from the connected programmable controller to node
address 31. This node address is converted to station number 127 by the CP
541.
PLC CP
541
31
SINEC L2
127
Figure 2-3 Address Conversion for Broadcast
You can establish a point-to-point connection to any PROFIBUS station
which can exchange data via FDL (free layer 2). Y ou do this with a broadcast
and use the SAP to specify only one other station in SINEC L2 which can
receive the message.
If only the CP 541 and another station in SINEC L2 use this SAP , you can
utilize this special form of broadcast to establish a connection to any other
non-Siemens device.
Introduction
Message Length
Implementation
Address
Conversion
FDL Connection
Communication Modes