Siemens S7 User Manual 2
Preface, Contents
SIMATIC NET NCM for Industrial Ethernet
Manual
for NCM S7 V5.2 and higher
Communication via Ethernet CPs
in S7 Stations
Installing and Starting the
Ethernet CP with STEP 7
SEND/RECEIVE
interface
Configuring Communication
Connections
Programming Functions (FCs)
NCM S7 Diagnostics
Firmware Loader
Appendix
References
1
2
3
4
5
6
7
A
11/2002
C79000–G8976–C129
Release 06
Glossary
Linking to Other Systems with
FETCH/WRITE
Document History
Index
B
C
D
Classification of Safety–Related Notices
This manual contains notices which you should observe to ensure your own
personal safety, as well as to protect the product and connected equipment. These
notices are highlighted in the manual by a warning triangle and are marked as
follows according to the level of danger:
Danger
!
!
!
indicates that death or severe personal injury will result if proper precautions are
not taken.
Warning
indicates that death or severe personal injury can result if proper precautions are
not taken.
Caution
with warning triangle indicates that minor personal injury can result if proper
precautions are not taken.
Caution
without warning triangle indicates that damage to property can result if proper
precautions are not taken.
Notice
indicates that an undesirable result or status can occur if the relevant notice is
ignored.
Note
highlights important information on the product, using the product, or part of the
documentation that is of particular importance and that will be of benefit to the
user.
2
SIMATIC NET NCM S7 for Industrial Ethernet
C79000-G8976-C129–06
Trademarks
SIMATICR, SIMATIC HMIR and SIMATIC NETR are registered trademarks of
SIEMENS AG.
Third parties using for their own purposes any other names in this document which
refer to trademarks might infringe upon the rights of the trademark owners.
Safety Instructions Regarding your Product:
Before you use the product described here, read the safety instructions below
thoroughly.
Qualified Personnel
Only qualified personnel should be allowed to install and work on this equipment.
Qualified persons are defined as persons who are authorized to commission, to
ground, and to tag circuits, equipment, and systems in accordance with
established safety practices and standards.
Correct Usage of Hardware Products
Note the following
Warning
!
This device and its components may only be used for the applications described in
the catalog or the technical description, and only in connection with devices or
components from other manufacturers which have been approved or recommended by Siemens.
This product can only function correctly and safely if it is transported, stored, set
up, and installed correctly, and operated and maintained as recommended.
Before you use the supplied sample programs or programs you have written yourself, make certain that no injury to persons nor damage to equipment can result in
your plant or process.
EU Directive: Do not start up until you have established that the machine on which
you intend to run this component complies with the directive 89/392/EEC.
Correct Usage of Software Products
Note the following
Warning
!
This software may only be used for the applications described in the catalog or the
technical description, and only in connection with software products, devices, or
components from other manufacturers which have been approved or recommended by Siemens.
Before you use the supplied sample programs or programs you have written yourself, make certain that no injury to persons nor damage to equipment can result in
your plant or process.
SIMATIC NET NCM S7 for Industrial Ethernet
C79000-G8976-C129–06
3
Prior to Startup
Before putting the product into operation, note the following warning:
Caution
Prior to startup you must observe the instructions in the relevant documentation.
For ordering data of the documentation please refer to the catalogs or contact your
local SIEMENS representative.
Disclaimer of LiabilityCopyright E Siemens AG 2001–2002 All rights reserved
The reproduction, transmission or use of this document or its contents is not
permitted without express written authority. Offenders will be liable for
damages. All rights, including rights created by patent grant or registration of
a utility model or design, are reserved.
Siemens AG
Automation and Drives
Postfach 4848, D-90327 Nürnberg
4
Siemens Aktiengesellschaft G79000–G8976–C129–06
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.
Subject to technical change.
SIMATIC NET NCM S7 for Industrial Ethernet
C79000-G8976-C129–06
This Manual on SIMATIC NET NCM S7 for Industrial Ethernet
...supports you when using the communication services provided by the SIMATIC
NET communications processors (Industrial Ethernet CPs) for communication on
SIMATIC NET with Industrial Ethernet in the management and cell areas.
The documentation on your S7-CPs and NCM S7 is in several parts that fit
together as shown below:
S S7-CP
– selecting
– installing
– commissioning
– performance data
S S7-CP and STEP 7 / NCM S7
– familiarization
– testing interfaces
– commissioning
Manual
Primer
S7-CP
for
S7-300 /
S7-400
STEP 7
NCM S7
S Communication services
with STEP 7 / NCM S7
– programming
– configuring
– downloading /
commissioning
– diagnostics
SIMATIC NET NCM S7 for Industrial Ethernet
C79000-G8976-C129–06
NCM S7
Manual
5
This Manual on SIMATIC NET NCM S7 for Industrial Ethernet
Audience
This manual is intended for personnel responsible for installing and programming
STEP 7 programs and for service personnel.
Scope of this Manual
This manual applies to version 5.2 and higher of the NCM S7 configuration
software for Industrial Ethernet and to version 5.2 and higher of the STEP 7
software.
This version of the manual includes information relating to new functions in STEP 7
and NCM S7 as of V5.2.
In the main, this involves the following topics:
S S7 communication over routers (single-ended client and server functionality) via
an IE/PB Link or CP (see Section 1.4)
S Multiprojects
With the new multiproject functionality, projects can be split up and distributed
for engineering and then merged again.
Symbols used in this Manual
This symbol indicates functions requiring STEP 7 version V5.2.
This symbol appears in the margin to draw your attention to useful tips.
This symbol indicates recommended documentation.
Where you see this symbol, you should also refer to additional information in the
basic help system of STEP 7.
This symbol indicates where detailed context-sensitive help is available. You can
F1
display these help texts with the F1 key or by clicking on the “Help” button in the
relevant dialog.
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SIMATIC NET NCM S7 for Industrial Ethernet
C79000-G8976-C129–06
This Manual on SIMATIC NET NCM S7 for Industrial Ethernet
You will find additional information in the following sources:
This manual is also part of the NCM S7 for Industrial Ethernet documentation
package. These documents are also on the Manual Collection CD supplied with
every S7-CP and they are also available on the Internet. The following table
provides you with an overview.
Title Content
S7-CPs for Industrial
Ethernet
Manual
This is available on the Internet at:
The manual S7-CPs for Industrial Ethernet contains information on the
characteristics of the CPs and instructions on installation and connections.
S General Section: http://www4.ad.siemens.de/view/cs/de/8777865
S CP 343-1: http://www4.ad.siemens.de/view/cs/de/8777308
S CP 343-1 PN: http://www4.ad.siemens.de/view/cs/de/8776538
S CP 343-1 IT: http://www4.ad.siemens.de/view/cs/de/8776544
S CP 443-1: http://www4.ad.siemens.de/view/cs/de/8776219
S CP 443-1 IT: http://www4.ad.siemens.de/view/cs/de/8776322
NCM S7 for Industrial
Ethernet
Primer
Based on simple examples, the primer introduces you to the methods of
connecting and networking SIMATIC S7 stations with CPs on Industrial
Ethernet. It shows you how the communications calls are entered in the user
program to allow you to use the services via the SEND/RECEIVE interface.
Y ou will learn how simple it is to create a configuration for standard
applications using STEP 7 and the NCM S7 optional package.
The examples described here can also be found in the project folder for
sample programs after you have installed STEP 7 and the NCM S7 for
Industrial Ethernet option!
This is available on the Internet at:
http://www4.ad.siemens.de/view/cs/de/1172503
NCM S7 for Industrial
Ethernet
Manual
IT-CP
Manual
Advanced PC
Configuration
Manual
SIMATIC NET NCM S7 for Industrial Ethernet
C79000-G8976-C129–06
The manual is intended as a guide and reference work for configuring and
programming an Industrial Ethernet CP.
This is available on the Internet at:
http://www4.ad.siemens.de/view/cs/de/1172423
The manual is intended as a guide and source of reference when working with
the IT-CP. In addition to the functions provided by an Ethernet CP, the IT-CP
also provides functions for Internet technology.
This is available on the Internet at:
http://www4.ad.siemens.de/view/cs/de/1172744
Advanced PC Configuration is the new tool with which you can commission a
PC station as part of an industrial communication network.
The manual supports you and helps you to make efficient use of
communications with your PC applications in conjunction with the SIMATIC
NET modules. This explains the steps involved in configuration with NCM S7.
This is available on the Internet at:
http://www4.ad.siemens.de/view/cs/
7
This Manual on SIMATIC NET NCM S7 for Industrial Ethernet
Quick Start CD: Samples covering all aspects of communication
The Quick Start CD that can be ordered separately is a
treasure-trove of sample programs and configurations.
You can order this directly over the Internet at:
http://www.ad.siemens.de/net/html_00/online_zugreifen.htm
Additional Information on SIMATIC S7 and STEP 7
The following documentation contains additional information about the STEP 7
standard software of the SIMATIC programmable controllers and can be obtained
from your local Siemens office.
Topic Document
Basic information for technical
personnel using the STEP 7
standard software for control
tasks with S7-300/400
programmable controllers.
STEP 7 basics with
S Configuring hardware with STEP 7
S Programming with STEP 7
S Manual for converting from S5 to S7
S Primer for a fast start
The reference works describing
the programming languages
LAD/FBD and STL as well as the
standard and system functions in
addition to the STEP 7 basic
knowledge.
STEP 7 reference manuals with
S Manuals for LAD/FBD/STL
S Standard and system functions for
S7-300/400
You will also find information on SIMATIC programmable controllers on the Quick
Start CD and from the Customer Support Online services at:
http://www.siemens.de/simatic–net General information
or
http://www.ad.siemens.de/csi/net Product information and downloads
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SIMATIC NET NCM S7 for Industrial Ethernet
C79000-G8976-C129–06
This Manual on SIMATIC NET NCM S7 for Industrial Ethernet
Access to Online Help of STEP 7 and NCM S7
With the online help, you can obtain the following information:
S You can display the contents of the STEP 7 basic help system with the menu
command Help –> Contents.
S Context-sensitive help on the selected object using the Help –>
F1
Context-Sensitive Help menu command, the F1 function key or the question
mark in the toolbar.
You can then access further information relating to the current topic.
S Glossary for all STEP 7 applications by clicking the “Glossary” button.
Please note that each STEP 7 application has its own contents and
context-sensitive help.
Conventions
References to other manuals and documentation are indicated by numbers in
slashes /.../. These numbers refer to the titles of manuals listed in the References
section of the Appendix.
-
SIMATIC NET NCM S7 for Industrial Ethernet
C79000-G8976-C129–06
9
Contents
1 Communication via Ethernet CPs in S7 Stations 13. . . . . . . . . . . . . . . . . . . . . . . . . .
1.1 Industrial Ethernet 14. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.2 SIMATIC S7 Communication with S7 Ethernet CPs 15. . . . . . . . . . . . . . . . . .
1.3 PG/OP Communication via Industrial Ethernet 19. . . . . . . . . . . . . . . . . . . . . .
1.3.1 PG Communication with STEP 7 over Industrial Ethernet 21. . . . . . . . . . . . .
1.3.2 OP Operation: Connecting Operator Interface Devices via Industrial
Ethernet 22. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.4 S7 Communication on Industrial Ethernet 23. . . . . . . . . . . . . . . . . . . . . . . . . . .
1.5 S5-compatible Communication (SEND/RECEIVE Interface) 27. . . . . . . . . . .
1.6 FETCH/WRITE Services (Server) 30. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.7 Networking Stations with STEP 7 31. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.7.1 Network/Project Variant: One Subnet – One Project 33. . . . . . . . . . . . . . . . . .
1.7.2 Network/Project Variant: SIMATIC S5 and Non-SIMATIC Devices
on the Subnet 34. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.7.3 Network/Project Variant: Two or More Subnets – One Project 35. . . . . . . . .
1.7.4 Network/Project Variant: One Subnet – More Than One (Sub)Project 36. . .
1.7.5 Network/Project Variant: Several Subnets in Several (Sub) Projects 39. . . .
1.7.6 Network/Project Variant: Connections between Subnets (TCP/IP) 41. . . . . .
2 Installing and Starting the Ethernet CP with STEP 7 43. . . . . . . . . . . . . . . . . . . . . . .
2.1 General Information About the NCM S7 for Industrial Ethernet Option 44. .
2.2 Procedure 45. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.2.1 Creating an Industrial Ethernet Subnet 46. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.2.2 Entering an Ethernet CP in the Hardware Configuration 49. . . . . . . . . . . . . .
2.2.3 Displaying the Network Attachments of a Station 52. . . . . . . . . . . . . . . . . . . .
2.2.4 Setting Further CP Properties 54. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.2.5 “Substitute Objects” in the STEP 7 Project 60. . . . . . . . . . . . . . . . . . . . . . . . . .
2.2.6 Configuring Communication Services 63. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.3 Assigning Addresses for the First Time (Applies to Latest CPs) 64. . . . . . . .
2.3.1 Addressing by Selecting the Target System in the SIMATIC Manager 65. . .
2.3.2 Addressing using the Properties Dialog in HW Config or NetPro 68. . . . . . .
2.4 Downloading the Configuration Data to the Target System 69. . . . . . . . . . . .
3 SEND/RECEIVE Interface in the User Program 73. . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.1 How the SEND/RECEIVE Interface Works on the CPU 74. . . . . . . . . . . . . . .
3.2 Programming the SEND/RECEIVE Interface 75. . . . . . . . . . . . . . . . . . . . . . . .
3.3 Data Exchange S7 CPU <–> Ethernet CP 78. . . . . . . . . . . . . . . . . . . . . . . . . .
3.4 Additional Information 80. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.4.1 Programming Data Transfer on TCP Connections 80. . . . . . . . . . . . . . . . . . .
3.4.2 Recommendations for Use with a High Communications Load 81. . . . . . . . .
4 Configuring Communication Connections 83. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4.1 Procedure 84. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
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SIMATIC NET NCM S7 for Industrial Ethernet
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Contents
4.2 Possible Connection Configurations 85. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4.3 Connections 87. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4.3.1 Creating a New Connection 90. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4.3.2 Connections to Partners in Other Projects 93. . . . . . . . . . . . . . . . . . . . . . . . . .
4.3.3 Further Functions 96. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4.3.4 Connections Without Assignment 97. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4.4 Configuring ISO Transport Connections 99. . . . . . . . . . . . . . . . . . . . . . . . . . . .
4.4.1 Specifying the Local Connection Endpoint 100. . . . . . . . . . . . . . . . . . . . . . . . . .
4.4.2 Specifying ISO Transport Addresses 102. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4.4.3 Specifying ISO Transport Dynamic Properties 105. . . . . . . . . . . . . . . . . . . . . . .
4.4.4 ISO Transport with the FETCH/WRITE Mode 107. . . . . . . . . . . . . . . . . . . . . . .
4.4.5 Checking ISO Transport Connection Properties 109. . . . . . . . . . . . . . . . . . . . .
4.5 Configuring ISO-on-TCP Connections Properties 110. . . . . . . . . . . . . . . . . . . .
4.5.1 Specifying the Local Connection Endpoint 111. . . . . . . . . . . . . . . . . . . . . . . . . .
4.5.2 Specifying ISO-on-TCP Addresses 113. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4.5.3 ISO-on-TCP with the FETCH/WRITE Mode 116. . . . . . . . . . . . . . . . . . . . . . . . .
4.5.4 Checking ISO-on-TCP Connection Properties 118. . . . . . . . . . . . . . . . . . . . . . .
4.6 Configuring TCP Connection Properties 119. . . . . . . . . . . . . . . . . . . . . . . . . . . .
4.6.1 Specifying the Local Connection Endpoint 120. . . . . . . . . . . . . . . . . . . . . . . . . .
4.6.2 Specifying TCP Addresses 122. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4.6.3 TCP with the FETCH/WRITE Mode 125. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4.6.4 Checking TCP Connection Properties 127. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4.7 Configuring UDP Connection Properties 128. . . . . . . . . . . . . . . . . . . . . . . . . . . .
4.7.1 Specifying the Local Connection Endpoint 129. . . . . . . . . . . . . . . . . . . . . . . . . .
4.7.2 Specifying UDP Addresses 131. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4.7.3 UDP with Broadcast and Multicast 134. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4.7.4 Checking the Properties of a UDP Connection 138. . . . . . . . . . . . . . . . . . . . . . .
4.7.5 Free UDP Connection 139. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4.8 Routing to Distribute Load 140. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5 Programming FCs (Functions) and FBs for S7 Ethernet CPs 141. . . . . . . . . . . . . . .
5.1 General Notes on FCs / FBs 142. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5.2 Setting Parameters for FC Calls 145. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5.2.1 Parameters for CP and Connection Assignment (input parameters) 145. . . .
5.2.2 Parameters for Specifying a CPU Data Area (input parameters) 147. . . . . . .
5.2.3 Status Information (output parameters) 147. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5.3 FCs for Configured Connections 148. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5.3.1 FC5 AG_SEND / FC50 AG_LSEND 152. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5.3.2 FC6 AG_RECV / FC60 AG_LRECV 161. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5.4 FCs for Access Coordination with FETCH/WRITE 167. . . . . . . . . . . . . . . . . . .
5.4.1 FC7 AG_LOCK 169. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5.4.2 FC8 AG_UNLOCK 171. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5.5 Numeric Data / Resource Requirements of the FCs 173. . . . . . . . . . . . . . . . . .
6 NCM S7 Diagnostics 175. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
6.1 Overview 176. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
6.2 Functions of NCM S7 Diagnostics 177. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
SIMATIC NET NCM S7 for Industrial Ethernet
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11
Contents
6.2.1 Installing and Starting NCM S7 Diagnostics 178. . . . . . . . . . . . . . . . . . . . . . . . .
6.2.2 General Menu Commands 180. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
6.3 Starting Diagnostics – Establishing a Connection to the Ethernet CP 182. . .
6.4 How to Use Diagnostics 185. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
6.5 Call-Specific Diagnostic Functions 186. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
6.6 Checklist for ‘Typical Problems‘ in a System 188. . . . . . . . . . . . . . . . . . . . . . . .
6.6.1 Checklist for General CP Functions 189. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
6.6.2 Communication Connections Checklist 190. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
7 Firmware Loader 191. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
7.1 Application 192. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
7.2 Loading Firmware 193. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
A References 197. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
B Glossary 201. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
B.1 General Section 202. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
B.2 Industrial Ethernet 206. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
B.3 PROFInet 208. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
C Linking to Other Systems with FETCH/WRITE 211. . . . . . . . . . . . . . . . . . . . . . . . . . . .
D Document History 217. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
E SIMATIC NET Support and Training 219. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Automation and Drives, Service & Support 219. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
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SIMATIC NET NCM S7 for Industrial Ethernet
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Communication via Ethernet CPs in S7 Stations
The Ethernet CP for SIMATIC S7 provides a series of communications services for
different tasks.
This chapter explains the following:
S The types of communication possible with the Ethernet CP on Industrial
S The tasks handled by the Ethernet CP for the various services
S How to create the conditions for your communications requirements
You will find further information in the following sources:
S When installing the Ethernet CP, please refer to the instructions in the manual
S For the functions and use of the STEP 7 configuration software, some of which
1
Ethernet
/1/ supplied with the Ethernet CP. This also contains further information about
the performance of the Ethernet CP .
is used to configure the CP (such as hardware configuration), please refer to /6/
and /8/.
S For using, structuring and handling Industrial Ethernet, you will find detailed
information in /11/.
S For a general introduction to local area networks with TCP/IP refer to /16/ and
/17/.
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Communication via Ethernet CPs in S7 Stations
1.1 Industrial Ethernet
Definition
Within the open, heterogeneous SIMATIC NET communication system, Industrial
Ethernet is the network for the management and cell level. Physically, Industrial
Ethernet is an electrical network that uses a shielded coaxial cable or twisted pair
or an optical network with fiber-optic cables.
Industrial Ethernet is defined by the international standard IEEE 802.3 (see /11/).
All-Round Communication in the Industrial Sector
Industrial Ethernet is integrated in the SIMATIC NET concept that allows
comprehensive networking of the management, cell and field levels in conjunction
with PROFIBUS and the AS-interface (AS-i).
Figure 1-1 Industrial Ethernet in the SIMATIC NET Concept
Network Access
Industrial Ethernet is accessed using the CSMA/CD (Carrier Sense Multiple
Access with Collision Detection) network access technique specified in
IEEE 802.3.
Industrial
Ethernet
(IEEE 802.3)
PROFIBUS
(EN 50170 Vol. 2 PROFIBUS)
AS-Interface
(AS-i, Actuator-Sensor Interface)
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Communication via Ethernet CPs in S7 Stations
1.2 SIMATIC S7 Communication with S7 Ethernet CPs
Types of Communication
The Ethernet CP for SIMATIC S7 supports the following types of communication
depending on the CP type:
Ethernet CP
S7/M7-400
Possible types of communication
S PG/OP communication
S S7 communication
S S5-compatible communication
S PROFInet communication
Ethernet CP
S7-300
Interfaces / Services /
Protocols
with the protocols
– ISO
– TCP/IP (RFC 1006)
with the SEND / RECEIVE interface and the protocols
– ISO Transport
– ISO-on-TCP (TCP/IP with RFC 1006)
– TCP/IP
– UDP
– E-mail:
with FETCH / WRITE services and the protocols
– ISO Transport
– ISO-on-TCP
– TCP/IP
with the protocols
– TCP/IP
S HTML process control with
web browser
S File management and file
access with FTP
S PG/OP communication
PG/OP communication is used to download programs and configuration data,
to run tests and diagnostic functions, and to control and monitor a plant from
OPs.
SIMATIC NET NCM S7 for Industrial Ethernet
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with the protocols
– HTTP / IP protocol
with the protocols
– FTP / IP protocol
15
Communication via Ethernet CPs in S7 Stations
S S7 communication
S7 communication forms a simple and efficient interface between SIMATIC S7
stations and PGs/PCs using communication function blocks.
S S5-compatible communication with SEND/RECEIVE interface
Depending on the CP type, the SEND/RECEIVE interface allows
program-controlled communication on a configured connection from a SIMATIC
S7 PLC to another SIMATIC S7 PLC, to a SIMATIC S5 PLC, to PCs/PGs, and
to any other station.
Depending on the CP type, the following communications services are available
on the SEND/RECEIVE interface:
– ISO Transport
optimized for top performance at the self-contained manufacturing level
– TCP/IP for internetwork communication with
ISO-on-TCP connections (RFC 1006), TCP connections and
UDP datagram service (including broadcast / multicast).
– Sending E-mail
The controller is capable of sending messages triggered by process events
(refer to the IT-CP manual for details /5/).
S S5-compatible communication with FETCH/WRITE services (server)
The FETCH/WRITE services (server) allow direct access to the system
memory areas on the SIMATIC S7 CPU from SIMATIC S5 or from devices of
other ranges.
Depending on the CP type, the following communications services are available
for FETCH/WRITE access:
– ISO Transport
optimized for top performance at the self-contained manufacturing level
– TCP/IP for internetwork communication with
ISO-on-TCP connections (RFC 1006), TCP connections.
S PROFInet communication
PROFInet is a standard of the PROFIBUS Users organization defining a
heterogeneous communications and engineering model.
An S7-300 station equipped with a CP capable of PROFInet can be
interconnected as a PROFInet component in SIMATIC iMap.
TCP connections are used for the PROFInet communication.
16
For more detailed information on PROFInet, refer to /23/.
S HTML process control
With an IT-CP, use the supplied functions and HTML pages to query important
system data using a Web browser (you should also refer to the instructions on
the IT-CP /5/).
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Communication via Ethernet CPs in S7 Stations
S File management and file access with FTP
The IT-CP (S7-400 / S7-300) provides additional functions for FTP services.
You can use your S7 station both as an FTP client and as an FTP server (refer
to the manual of the IT-CP /5/).
– S7 Station as FTP Client
You can transfer data blocks from or to a file server.
– S7 Station as FTP Server
Another station, for example, a PC transfers data blocks to or from the S7
station the file system on the IT-CP.
Possibilities for Communication between Device Types
The possible communication available with the types of communication listed
above is shown in the following table:
S7-300
S7/M7-400
S7 communication
SEND/RECEIVE
PROFInet
S7 communication
SEND/RECEIVE
1) PC only as client
S7-300
S7-400
S7 communication SEND/RECEIVE
SEND/RECEIVE
S7 communication
SEND/RECEIVE
FTP services
S5-115 to -155U/H
FETCH/WRITE
SEND/RECEIVE
FETCH/WRITE
PC
PG/OP
communication
S7 communication
SEND/RECEIVE
FETCH/WRITE
HTML process
control
PROFInet
FTP services
PG/OP
communication
S7 communication
SEND/RECEIVE
FETCH/WRITE
HTML process
control
FTP services
1)
1)
1)
1)
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Communication via Ethernet CPs in S7 Stations
Configuration and Diagnostics
To connect and configure the Ethernet CP, you require the STEP 7 configuration
software and the SIMATIC NET NCM S7 for Industrial Ethernet option.
NCM S7 for Industrial Ethernet is installed as a STEP 7 option and is therefore
integrated in STEP 7.
NCM S7 for Industrial Ethernet also provides a wide range of diagnostic functions
for the various types of communication.
When configuring PROFInet communication, you also use the engineering tool
SIMATIC iMap; for detailed information on SIMATIC iMap, refer to the manual
Component based Automation – Configuring Plants with SIMATIC iMap /23/.
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Communication via Ethernet CPs in S7 Stations
1.3 PG/OP Communication via Industrial Ethernet
Application
PG/OP communication provides functions that are already integrated in every
SIMATIC S7/M7/C7 device.
A distinction must be made between the following two types of function:
S PG communication
PG communication with STEP 7 PLCs on Industrial Ethernet means the
following:
– You can use the complete range of functions of STEP 7 on Industrial
Ethernet.
– You can use programming, diagnostic, operating and monitoring functions on
all modules in the SIMATIC S7 PLC via Industrial Ethernet.
S OP Operation
PG/OP communication on Industrial Ethernet allows the operation and
monitoring of all modules in a SIMATIC S7 PLC using operator interface
systems (TD/OP).
The Ethernet CP acts as a “communications relay” that relays the PG/OP
communication via Industrial Ethernet.
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Communication via Ethernet CPs in S7 Stations
Operator Interface functions
Ethernet attachment
S7 – 400
Ethernet CP
OP
S7 – 300
PC with Ethernet CP
STEP 7
NCM S7
Create configuration data for
every CP and download to the
Ethernet CPs
Ethernet
Ethernet CP
S7 – 400
Modem /
ISDN
WAN *
* only TCP/IP
Figure 1-2 Configuration for PG/OP Operation
20
Ethernet CP
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Communication via Ethernet CPs in S7 Stations
1.3.1 PG Communication with STEP 7 over Industrial Ethernet
Requirements for PG Communication
PG communication is possible when the following requirements are met:
S An Ethernet CP is installed in the PG or engineering station or there is a
modem/ISDN interface for remote access.
S The Ethernet CP must have an address (default MAC address or set the IP
address).
Networking the PG / Engineering Station
Depending on the configuration of the PG or Engineering Station, the following two
situations are possible when using PG communication:
S PG / Engineering Station in the Configured Mode
If you select this configuration when you commission the PG / engineering
station, the interfaces of the communication modules you are using are already
known. The option in “Set PG/PC Interface” is automatically set to
“PC-internal”.
Once you have downloaded this configuration to your PG / engineering station,
you can exchange PG functions with the accessible nodes in the network with
STEP 7 without requiring any further settings.
S PG / Engineering Station in PG Operation
If your PG or engineering station is configured for this mode, you must specify the
interface on the PG or engineering station explicitly with “Set PG/PC Interface”.
Follow the steps outlined below:
1. Open the “Set PG/PC Interface” dialog box in the Windows Control Panel.
2. Set the PG/PC interface according to the CPs available on your PG and
according to the bus attachment (interface parameter assignment used).
For more detailed information on the topic of PG operation and engineering station,
refer to /4/.
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Communication via Ethernet CPs in S7 Stations
1.3.2 OP Operation: Connecting Operator Interface Devices via Industrial Ethernet
Requirements
Operation allowing operator interface functions is possible when the following
conditions are met:
S The operator interface device has:
– an Ethernet CP installed
– SOFTNET S7 for Ind. Ethernet or S7-1613/ WIN 95, WIN NT, MS-DOS,
Windows installed.
S The CPs in the S7 stations are supplied with a MAC/IP address (use the default
MAC address or set an IP address).
Procedure
To be able to use S7 communication, address the required module in the SIMATIC
S7 PLC on your operator interface system.
For more detailed information, refer to the description of your operator interface
system.
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Communication via Ethernet CPs in S7 Stations
1.4 S7 Communication on Industrial Ethernet
Application
S7 communication via Industrial Ethernet allows program-controlled
communication using communication SFBs/FBs via configured S7 connections.
Per job, up to 64 Kbytes of user data can be transmitted.
The Ethernet CP acts as an “S7 communication relay” by passing on the S7
functions via Industrial Ethernet (see /8/). Depending on the configuration of the
Ethernet CP, data transfer is on the basis of the ISO transport or the ISO-on-TCP
protocol (TCP/IP with RFC 1006).
From the perspective of the user, S7 communication is identical over PROFIBUS
and Industrial Ethernet.
Nodes
Two cases can be distinguished depending on device type and plant configuration:
S Client and server functionality at both ends
S7 connections can be operated between the following nodes with the entire
functionality of S7 communication:
– between S7 stations S7-300 and S7-400;
– between S7 stations and PC/PG stations with an Ethernet CP.
S7 – 400
Ethernet
Ethernet CP
S7 – 300
Ethernet CP
PUT / GET
BSEND / BRECV
WAN *
USEND / URECV
M7
* only TCP/IP
PC/PG with Ethernet CP
Figure 1-3 Nodes Communicating on S7 Connections over Industrial Ethernet
SIMATIC NET NCM S7 for Industrial Ethernet
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S7 – 300 / 400
23
Communication via Ethernet CPs in S7 Stations
S Client and server functionality at one end only (S7 connections
configured at one end)
In the following situations, write and read functions can be implemented with
PUT / GET:
– S7 communication over router
PG/PC stations can access S7 stations if the PG/PC stations are connected
to a different subnet (PROFIBUS / Ethernet) via routers (for example, an
IE/PB Link); in this case, S7 stations are servers.
S7 communication is possible over a gateway.
Ethernet
S7 – 400
PROFIBUS
Ethernet CP
PC/PG Station
S7 – 300
PUT / GET
Ethernet
Ethernet CP
PC/PG Station
IE/PB Link
PUT / GET
Figure 1-4 PC/PG station communicates over a gateway with S7 stations on an underlying PROFIBUS
or Ethernet
For more detailed information on the features supported by your Ethernet CP, refer
to the manual /1/.
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Communication via Ethernet CPs in S7 Stations
Configuring S7 Connections
Create S7 connections to use S7 communication for data exchange between two
SIMATIC S7 stations.
For more detailed information, refer to the STEP 7 Description /6/ /8/.
Notice
S7 connections via routers are supported only within a STEP 7 project but not between partners in different STEP 7 projects of a multiproject!
Interface in the User Program of the S7 Station
You use SFBs (for S7-400) and FBs (for S7-300) in the user program.
Block type
SFB / FB12 BSEND x – STEP 7
SFB / FB13 BRCV x
SFB / FB15 PUT x –
SFB / FB14 GET x –
SFB / FB8 USEND x –
SFB / FB9 URCV – x
SFC / FC62 CONTROL (S7-400) /
1) you do not need to configure a connection on the server
2) for S7-300
1)
C_CNTRL (S7-300)
Client Server Described in
Documentation /9/
1)
1)
x x
2)
Notice
Please remember the following points regarding data consistency in your user program:
In the CPU of the S7 station, the read or written information is taken from the S7
user program into the operating system or copied from the operating system to the
S7 user program in blocks of 8 or 32 bytes (depending on the firmware version).
If information in the word or double-word format is located across such boundaries, data inconsistency may arise during transmission using S7 communication!
For more detailed information, refer to the STEP 7 documentation /9/.
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Communication via Ethernet CPs in S7 Stations
Notes on S7 communication between PC/PG station and S7 station
Applications in a PC/PG station communicate with the S7 station over an OPC
interface or SAPI-S7 interface for operator intervention, monitoring and control.
The S7 stations use the integrated communication SFBs/FBs (client and server
functionality at both ends).
The following general requirements must be met by a PC/PG station for S7
communication:
S On the PC/PG:
– an Ethernet CP installed
– there is an interface for S7 communication installed: SOFTNET S7 for Ind.
Ethernet or S7-1613/ WIN 95, WIN NT, MS-DOS, Windows.
S The CPs in the S7 stations are supplied with a MAC/IP address (use the default
MAC address or set an IP address).
To use S7 communication with the SIMATIC S7 PLC from a PC, address the
required CPU module in the SIMATIC S7 PLC that you want to communicate with
in your PC application.
S7 communication via routers (one-ended client and server functionality)
It is possible to reach the S7 station from an application (OPC server) of the
PC/PG station that is attached to another subnet. The subnets must be connected
over a router such as the IE/PB Link. An S7 station or a PC connected to both
subnets can also serve as a router.
In this configuration, the S7 station can only be addressed by the PC/PG station as
a communications server on S7 connections configured at one end.
The requirements for the configuration of the PC/PG station are identical to those
for operation in the same subnet (see above); the CP in the PC/PG station must
also have routing capability.
In this situation, configure a one-ended S7 connection to the PC/PG station in the
other subnet for the PC/PG station in STEP 7 NetPro. You can then access data in
the S7 station in your user program using the functions PUT (writing) and GET
(reading).
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Communication via Ethernet CPs in S7 Stations
1.5 S5-compatible Communication (SEND/RECEIVE
1
Interface
Application
Using the SEND/RECEIVE interface, your S7 user program has access to
S5-compatible communication with configured transport connections.
Data transmission on a configured transport connection is suitable for
S the reliable transmission of related blocks of data between two Ethernet nodes
using
– TCP (see /17//19//20/) with ISO-on-TCP connection (see /18/) or TCP
– ISO transport connection
S simple (unacknowldeged) transfer of related blocks of data (datagram service)
between two Ethernet nodes with UDP (User Datagram Protocol) on IP.
)
connection;
The SEND/RECEIVE interface is also suitable for sending E-mail (refer to the
manual for the IT-CP /5/).
For TCP applications, there is an active network with IP protocol (see /20/).
ISO Transport Connection
ISO transport provides services for the reliable transfer of data on configured
connections. Due to the segmentation of the data, large amounts of data can be
transmitted.
Transmission reliability is extremely high due to automatic repetition and additional
field check mechanisms. The communications partner confirms reception of data
and the sender receives a return value on the SEND/RECEIVE interface.
ISO transport is operated only on Industrial Ethernet and is optimized for
high-performance operation at the self-contained manufacturing level.
1The previous name of the SEND/RECEIVE interface was S5S5 connections
SIMATIC NET NCM S7 for Industrial Ethernet
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Communication via Ethernet CPs in S7 Stations
IP (Internet Protocol)
For internetwork data transmission, the following services are available with
suitable CPs such as the CP 443-1 TCP:
S ISO-on-TCP connection
ISO-on-TCP is intended for reliable, internetwork data transmission.
The ISO-on-TCP service corresponds to the TCP/IP standard (Transmission
Control Protocol/Internet Protocol) with the RFC 1006 extension according to
layer 4 of the ISO reference model (see /18/).
RFC 1006 extends the TCP protocol by allowing the transmission of blocks of
data (“messages”) assuming that both partners support RFC 1006.
Transmission reliability is extremely high due to automatic repetition and
additional field check mechanisms. The communications partner confirms
reception of data and the sender receives a return value on the
SEND/RECEIVE interface.
S TCP connection
When using the SEND/RECEIVE interface on TCP connections, the Ethernet
CP supports the socket interface (for example, Winsock.dll) to TCP/IP found on
almost every system (PC or other system).
TCP is intended for reliable internetwork data transmission.
The TCP service complies with the TCP/IP standard (Transmission Control
Protocol/Internet Protocol; see /18/).
S UDP connection
UDP is intended for simple internetwork data transmission without confirmation.
If the connection is suitably configured, broadcast and multicast frames can
also be sent on UDP connections.
To avoid overload due to high broadcast load, the CP does not allow reception
of UDP broadcasts. As an alternative, use the multicast function over a UDP
connection. This allows you to register the CP as a node in a multicast group.
SEND/RECEIVE interface
Data transfer is triggered by the user program. The interface to the user program in
the SIMATIC S7 is formed by special SIMATIC S7 blocks of the type FC
(functions).
28
SIMATIC NET NCM S7 for Industrial Ethernet
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Stations
Communication via Ethernet CPs in S7 Stations
The SEND/RECEIVE interface allows program-controlled communication on
Industrial Ethernet between the SIMATIC S7 PLC and the following:
S SIMATIC S7 PLC with Ethernet CP
S SIMATIC S5 PLC with Ethernet CP
S PC/PG with Ethernet CP
S Other station with Industrial Ethernet attachment
S7 – 400
Ethernet
SIMATIC S5
with Ethernet CP
Ethernet CP
WAN
Internet
Router
S7 – 300
Other station with
Ethernet attachment
only TCP/IP
Ethernet CP
D D D
D D D
D D DD D D
PG/PC with Ethernet
attachment
Figure 1-5 SIMATIC S7 PLC with Possible Communications Partners on the SEND/RECEIVE Interface
SIMATIC NET NCM S7 for Industrial Ethernet
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Communication via Ethernet CPs in S7 Stations
1.6 FETCH/WRITE Services (Server)
Application
In addition to the SEND/RECEIVE interface, the FETCH/WRITE functionality
provides further services for S5-compatible communication on configured transport
connections.
The FETCH/WRITE interface is used primarily to attach SIMATIC S7 to SIMATIC
S5 and to other non-S7 stations (for example PCs).
S FETCH
The partner on the connection (SIMATIC S5 or non-S7 station) can read
system data on the SIMATIC S7 PLC.
S WRITE
The partner on the connection (SIMATIC S5 or non-S7 station) can write
system data on the SIMATIC S7 PLC.
From the point of view of the SIMATIC S7 PLC, this is a passive communication
function; the communications partner initiates the connection establishment.
For further information, refer to the system documentation of the SIMATIC S5 PLC
or the non-S7 station you are using.
Connection Types
To access a station with FETCH or WRITE functions, a FETCH passive or WRITE
passive connection must be configured. The following types are possible:
S ISO Transport
S ISO-on-TCP
S TCP
Coordinating Access Using the User Program
To coordinate access, you can use the FCs AG_LOCK and AG_UNLOCK.
With these FCs, you can coordinate access to system memory areas so that no
inconsistent data are created and transferred.
SIMATIC S5
30
On the SIMATIC S5 station, the FETCH/WRITE services are configured and
started by READ ACTIVE/PASSIVE and WRITE ACTIVE/PASSIVE.
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