Siemens NCM S7 User Manual

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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

Programmed Communication Connections

Programming FCs (Functions) and FBs for S7 Ethernet CPs

NCM S7 Diagnostics

Firmware loader

1 2 3 4 5 6 7 8

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Appendix

References

Glossary Linking to Other Systems with

FETCH/WRITE

Document History Index

A 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.

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Trademarks

SIMATICR, SIMATIC HMIR and SIMATIC NETR are registered trademarks of SIEMENS AG.

Third parties using for their own purposes any other names in this document which refer to trademarks might infringe upon the rights of the trademark owners.

Safety Instructions Regarding your Product:

Before you use the product described here, read the safety instructions below thoroughly.

Qualified Personnel

Only qualified personnel should be allowed to install and work on this equipment. Qualified persons are defined as persons who are authorized to commission, to ground, and to tag circuits, equipment, and systems in accordance with established safety practices and standards.

Correct Usage of Hardware Products

Note the following

Warning

This device and its components may only be used for the applications described in the catalog or the technical description, and only in connection with devices or components from other manufacturers which have been approved or recommended by Siemens.

This product can only function correctly and safely if it is transported, stored, set up, and installed correctly, and operated and maintained as recommended.

Before you use the supplied sample programs or programs you have written yourself, make certain that no injury to persons nor damage to equipment can result in your plant or process.

EU Directive: Do not start up until you have established that the machine on which you intend to run this component complies with the directive 89/392/EEC.

Correct Usage of Software Products

Note the following

Warning

This software may only be used for the applications described in the catalog or the technical description, and only in connection with software products, devices, or components from other manufacturers which have been approved or recommended by Siemens.

Before you use the supplied sample programs or programs you have written yourself, make certain that no injury to persons nor damage to equipment can result in your plant or process.

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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.

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 Industrial Communication Postfach 4848, D-90327 Nürnberg

Siemens Aktiengesellschaft G79000-G8976-C129-07

We have checked the contents of this manual for agreement with the hardware and software described. Since deviations cannot be precluded entirely, w e 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.

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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

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NCM S7 Manual

This Manual on SIMATIC NET NCM S7 for Industrial Ethernet

Audience

This manual is intended for personnel responsible for installing and programming STEP 7 programs and for service personnel.

Scope of this Manual

This manual applies to version 5.2 and higher of the NCM S7 configuration software for Industrial Ethernet and to version 5.2 and higher of the STEP 7 software.

This manual also includes specially marked passages that apply specifically to and require version 5.2 SP1 of the NCM S7 for Industrial Ethernet configuration software and version 5.2 SP1 of the STEP 7 software.

These include new functions for IP configuration: S IP access protection

Using IP access protection gives you the opportunity of restricting access to the local S7 station to partners with specific IP addresses.

S Configuring connections from the user program

In some situations, it is an advantage to set up communication connections not over the configuration interface of STEP 7 but program-controlled by specific applications.

As of STEP 7 V5.2 SP1, a function block is available for these applications that allows flexible transfer of data blocks with configuration data to an Ethernet CP.

The description of the configuration for FETCH / WRITE services has been extended.

Notice

Please note that the availability of new functions depends on the type of CP you are using. You can check which functions your module supports in the description in the Properties dialog in STEP 7 and in the catalog in HW Config.

The manual contains more detailed information /1/.

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Symbols Used in this Manual

Unless indicated otherwise, the functions described in this manual assume the use of STEP 7. This symbol is used to indicate functions that require a specific version of STEP 7 or higher, for example Version V5.2.

This symbol appears in the margin to draw your attention to useful tips.

This symbol indicates recommended documentation.

Where you see this symbol, you should also refer to additional information in the basic help system of STEP 7.

This Manual on SIMATIC NET NCM S7 for Industrial Ethernet

Conventions

This symbol indicates where detailed context-sensitive help is available. You can display these help texts with the F1 key or by clicking on the “Help” button in the relevant dialog.

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.

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This Manual on SIMATIC NET NCM S7 for Industrial Ethernet

You will find additional information in the following sources:

This manual is also part of the NCM S7 for Industrial Ethernet documentation package. These documents are also on the Manual Collection CD supplied with every S7 CP and they are also available on the Internet. The following table provides you with an overview.

Title Content

S7-CPs for Industrial Ethernet

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!

NCM S7 for Industrial Ethernet

Manual

IT-CP Manual

Advanced PC Configuration

Commissioning PC Stations

Manual

This is available on the Internet at:

http://www4.ad.siemens.de/view/cs/de/1172503

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. It explains the steps involved in configuration with NCM S7.

This is available on the Internet at:

http://www4.ad.siemens.de/view/cs/13542666

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Quick Start CD: Samples covering all aspects of communication

The Quick Start CD that can be ordered separately is a treasure-trove of sample programs and configurations.

You can order this directly over the Internet at:

http://www4.ad.siemens.de/view/cs/de/574211

Additional Information on SIMATIC S7 and STEP 7

The following documentation contains additional information about the STEP 7 standard software of the SIMATIC programmable controllers and can be obtained from your local Siemens office.

Topic 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

http://www.ad.siemens.de/csi/net Product information and downloads

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Access to Online Help of STEP 7 and NCM S7

With the online help, you can obtain the following information: S You can display the contents of the STEP 7 basic help system with the menu

command Help –> Contents.

S Context-sensitive help on the selected object using the Help –> Context-Sensitive

Help menu command, the F1 function key or the question mark in the toolbar.

You can then access further information relating to the current topic. S Glossary for all STEP 7 applications by clicking the “Glossary” button. Please note that each STEP 7 application has its own contents and

context-sensitive help.

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1 Communication via Ethernet CPs in S7 Stations 15. . . . . . . . . . . . . . . . . . . . . . . . . .

1.1 Industrial Ethernet 16. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

1.2 SIMATIC S7 Communication with S7 Ethernet CPs 17. . . . . . . . . . . . . . . . . .

1.3 PG/OP Communication via Industrial Ethernet 21. . . . . . . . . . . . . . . . . . . . . .

1.3.1 PG Communication with STEP 7 over Industrial Ethernet 23. . . . . . . . . . . . .

1.3.2 OP Operation: Connecting Operator Interface Devices via

Industrial Ethernet 24. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

1.4 S7 Communication on Industrial Ethernet 25. . . . . . . . . . . . . . . . . . . . . . . . . . .

1.5 S5-compatible Communication (SEND/RECEIVE Interface) ) 29. . . . . . . . . .

1.6 FETCH/WRITE Services (Server) 32. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

1.7 Networking Stations with STEP 7 33. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

1.7.1 Network/Project Variant: One Subnet – One Project 35. . . . . . . . . . . . . . . . . .

1.7.2 Network/Project Variant: SIMATIC S5 and Non-SIMATIC

Devices on the Subnet 36. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

1.7.3 Network/Project Variant: Two or More Subnets – One Project 37. . . . . . . . .

1.7.4 Network/Project Variant: One Subnet – More Than One (Sub)Project 38. . .

1.7.5 Network/Project Variant: Several Subnets in Several (Sub) Projects 41. . . .

1.7.6 Network/Project Variant: Connections between Subnets (TCP/IP) 43. . . . . .

2 Installing and Starting the Ethernet CP with STEP 7 45. . . . . . . . . . . . . . . . . . . . . . .

2.1 General Information About the NCM S7 for Industrial Ethernet Option 46. .

2.2 Procedure 47. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2.2.1 Creating an Industrial Ethernet Subnet 48. . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2.2.2 Entering an Ethernet CP in the Hardware Configuration 51. . . . . . . . . . . . . .

2.2.3 Displaying the Network Attachments of a Station 55. . . . . . . . . . . . . . . . . . . .

2.2.4 Setting Further CP Properties 57. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2.2.5 “Substitute Objects” in the STEP 7 Project 65. . . . . . . . . . . . . . . . . . . . . . . . . .

2.2.6 Configuring Communication Services 68. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2.3 Assigning Addresses for the First Time (Applies to Latest CPs) 69. . . . . . . .

2.3.1 Addressing by Selecting the Target System in the SIMATIC Manager 70. . .

2.3.2 Addressing using the Properties Dialog in HW Config or NetPro 73. . . . . . .

2.4 Downloading the Configuration Data to the Target System 74. . . . . . . . . . . .

3 SEND/RECEIVE Interface in the User Program 77. . . . . . . . . . . . . . . . . . . . . . . . . . . .

3.1 How the SEND/RECEIVE Interface Works on the CPU 78. . . . . . . . . . . . . . .

3.2 Programming the SEND/RECEIVE Interface 79. . . . . . . . . . . . . . . . . . . . . . . .

3.3 Data Exchange S7 CPU <–> Ethernet CP 82. . . . . . . . . . . . . . . . . . . . . . . . . .

3.4 Additional Information 84. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3.4.1 Programming Data Transfer on TCP Connections 84. . . . . . . . . . . . . . . . . . .

3.4.2 Recommendations for Use with a High Communications Load 85. . . . . . . . .

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Contents

4 Configuring Communication Connections 87. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

4.1 Procedure 88. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

4.2 Possible Connection Configurations 89. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

4.3 Connections 91. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

4.3.1 New Connection 94. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

4.3.2 Connections to Partners in Other Projects 96. . . . . . . . . . . . . . . . . . . . . . . . . .

4.3.3 Further Functions 99. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

4.3.4 Connections Without Assignment 100. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

4.4 Configuring ISO Transport Connections 103. . . . . . . . . . . . . . . . . . . . . . . . . . . .

4.4.1 Specifying the Local Connection Endpoint 104. . . . . . . . . . . . . . . . . . . . . . . . . .

4.4.2 Specifying ISO Transport Addresses 106. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

4.4.3 Specifying ISO Transport Dynamic Properties 109. . . . . . . . . . . . . . . . . . . . . . .

4.4.4 Checking ISO Transport Connection Properties 111. . . . . . . . . . . . . . . . . . . . .

4.5 Configuring ISO-on-TCP Connections Properties 112. . . . . . . . . . . . . . . . . . . .

4.5.1 Specifying the Local Connection Endpoint 113. . . . . . . . . . . . . . . . . . . . . . . . . .

4.5.2 Specifying ISO-on-TCP Addresses 115. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

4.5.3 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 123. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

4.6.3 Checking TCP Connection Properties 126. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

4.7 Configuring UDP Connection Properties 127. . . . . . . . . . . . . . . . . . . . . . . . . . . .

4.7.1 Specifying the Local Connection Endpoint 128. . . . . . . . . . . . . . . . . . . . . . . . . .

4.7.2 Specifying UDP Addresses 130. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

4.7.3 UDP with Broadcast and Multicast 133. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

4.7.4 Checking the Properties of a UDP Connection 137. . . . . . . . . . . . . . . . . . . . . . .

4.7.5 Free UDP Connection 138. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

4.8 FETCH/WRITE Mode 139. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

4.9 Routing to Distribute Load 143. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

5 Programmed Communication Connections 145. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

5.1 Overview 146. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

5.2 Procedure 148. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

5.3 Configuration Data Block 149. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

5.4 Parameter Field for System Data

(CP Networking) 150. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

5.5 Parameter Fields for Connection Types 152. . . . . . . . . . . . . . . . . . . . . . . . . . . .

5.5.1 Parameter Field for TCP Connection 153. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

5.5.2 Parameter Field for a UDP Connection 154. . . . . . . . . . . . . . . . . . . . . . . . . . . . .

5.5.3 Parameter Field for an ISO-on-TCP Connection 155. . . . . . . . . . . . . . . . . . . . .

5.5.4 Parameter Field for an E-Mail Connection 156. . . . . . . . . . . . . . . . . . . . . . . . . .

5.5.5 Parameter field for FTP connection 158. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

5.6 Subfield types 159. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

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Contents

6 Programming FCs (Functions) and FBs for S7 Ethernet CPs 163. . . . . . . . . . . . . . .

6.1 General Notes on FCs / FBs 164. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

6.2 Setting Parameters for FC Calls 167. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

6.2.1 Parameters for CP and Connection Assignment (input parameters) 167. . . .

6.2.2 Parameters for Specifying a CPU Data Area (input parameters) 169. . . . . . .

6.2.3 Status Information (output parameters) 169. . . . . . . . . . . . . . . . . . . . . . . . . . . . .

6.3 FCs for the SEND/RECEIVE Interface 170. . . . . . . . . . . . . . . . . . . . . . . . . . . . .

6.3.1 FC5 AG_SEND / FC50 AG_LSEND 174. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

6.3.2 FC6 AG_RECV / FC60 AG_LRECV 184. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

6.4 FCs for Access Coordination with FETCH/WRITE 191. . . . . . . . . . . . . . . . . . .

6.4.1 FC7 AG_LOCK 193. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

6.4.2 FC8 AG_UNLOCK 195. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

6.5 FB55 IP_CONFIG for Programmed Communication Connections 197. . . . . .

6.6 Numeric Data / Resource Requirements of the FCs 203. . . . . . . . . . . . . . . . . .

7 NCM S7 Diagnostics 205. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

7.1 Overview 206. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

7.2 Functions of NCM S7 Diagnostics 207. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

7.2.1 Installing and Starting NCM S7 Diagnostics 208. . . . . . . . . . . . . . . . . . . . . . . . .

7.2.2 General Menu Commands 210. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

7.3 Starting Diagnostics 212. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

7.3.1 Establishing a Connection to the Ethernet CP 212. . . . . . . . . . . . . . . . . . . . . . .

7.3.2 Starting Diagnostics from the CP Properties Dialog 212. . . . . . . . . . . . . . . . . .

7.3.3 Starting Diagnostics from the Windows Start Menu 213. . . . . . . . . . . . . . . . . .

7.3.4 Using a Gateway 215. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

7.3.5 Using the PC Station – Setting a Gateway with “PC internal” 217. . . . . . . . . .

7.3.6 Other Ways of Starting Diagnostics 218. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

7.4 How to Use Diagnostics 219. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

7.5 Starting Diagnostic Functions Explicitly 220. . . . . . . . . . . . . . . . . . . . . . . . . . . . .

7.6 Checklist for “Typical Problems” in a System 222. . . . . . . . . . . . . . . . . . . . . . . .

7.6.1 Checklist for General CP Functions 223. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

7.6.2 Communication Connections Checklist 224. . . . . . . . . . . . . . . . . . . . . . . . . . . . .

8 Firmware Loader 225. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

8.1 Application 226. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

8.2 Loading Firmware 227. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

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Contents

A References 229. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

B Glossary 233. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

B.1 General Section 234. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

B.2 Industrial Ethernet 238. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

B.3 PROFInet 240. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

C Linking to Other Systems with FETCH/WRITE 243. . . . . . . . . . . . . . . . . . . . . . . . . . . .

D Document History 249. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Index 251. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

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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

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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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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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 – UDP – E-mail

with FETCH / WRITE services and the protocols

– ISO Transport – ISO-on-TCP – TCP

with the protocols

– TCP

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.

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with the protocols

– HTTP / IP protocol

with the protocols

– FTP / IP protocol

Communication via Ethernet CPs in S7 Stations

S S7 communication

S7 communication forms a simple and efficient interface between SIMATIC S7 stations and PGs/PCs using communication function blocks.

S S5-compatible communication with SEND/RECEIVE interface

Depending on the CP type, the SEND/RECEIVE interface allows program-controlled communication on a configured connection from a SIMATIC S7 PLC to another SIMATIC S7 PLC, to a SIMATIC S5 PLC, to PCs/PGs, and to any other station.

Depending on the CP type, the following communications services are available on the SEND/RECEIVE interface:

– ISO Transport

optimized for top performance at the self-contained manufacturing level

– TCP/IP for internetwork communication with

ISO-on-TCP connections (RFC 1006), TCP connections and UDP datagram service (including broadcast / multicast).

– Sending E-mail

The controller is capable of sending messages triggered by process events (refer to the IT-CP manual for details /5/).

S S5-compatible communication with FETCH/WRITE services (server)

The FETCH/WRITE services (server) allow direct access to the system memory areas on the SIMATIC S7 CPU from SIMATIC S5, SIMATIC PC stations, or from devices of other ranges.

Depending on the CP type, the following communications services are available for FETCH/WRITE access:

– ISO Transport

optimized for top performance at the self-contained manufacturing level

– TCP/IP for internetwork communication with

ISO-on-TCP connections (RFC 1006), TCP connections.

S PROFInet communication

PROFInet is a standard of the PROFIBUS Users organization defining a heterogeneous communications and engineering model.

An S7-300 station equipped with a CP capable of PROFInet can be interconnected as a PROFInet component in SIMATIC iMap.

TCP connections are used for the PROFInet communication.

For more detailed information on PROFInet, refer to /23/.

S HTML process control

With an IT-CP, use the supplied functions and HTML pages to query important system data using a Web browser (you should also refer to the instructions on the IT-CP /5/).

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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 station

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

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Communication via Ethernet CPs in S7 Stations

Configuration and Diagnostics

To connect and configure the Ethernet CP, you require the STEP 7 configuration software and the SIMATIC NET NCM S7 for Industrial Ethernet option.

NCM S7 for Industrial Ethernet is installed as a STEP 7 option and is therefore integrated in STEP 7.

NCM S7 for Industrial Ethernet also provides a wide range of diagnostic functions for the various types of communication.

When configuring PROFInet communication, you also use the engineering tool SIMATIC iMap; for detailed information on SIMATIC iMap, refer to the manual Component based Automation – Configuring Plants with SIMATIC iMap /23/.

Programmed Connections

In some situations, it is an advantage to set up communication connections not over the configuration interface of STEP 7 but program-controlled by specific

V 5.2.1

applications. As of STEP 7 V5.2 SP1, a function block is available for these applications that

allows flexible transfer of data blocks with configuration data to an Ethernet CP.

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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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Operator interface functions

Ethernet attachment

S7 – 400

Ethernet CP

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

Ethernet CP

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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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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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1.4 S7 Communication on Industrial Ethernet

Application

S7 communication via Industrial Ethernet allows program-controlled communication using communication SFBs/FBs via configured S7 connections. Per job, up to 64 Kbytes of user data can be transmitted.

The Ethernet CP acts as an “S7 communication relay” by passing on the S7 functions via Industrial Ethernet (see /8/). Depending on the configuration of the Ethernet CP, data transfer is on the basis of the ISO transport or the ISO-on-TCP protocol (TCP/IP with RFC 1006).

From the perspective of the user, S7 communication is identical over PROFIBUS and Industrial Ethernet.

Nodes

Two situations can occur depending on device type and plant configuration:

S Client and server functionality at both ends

S7 connections can be operated between the following nodes with the entire functionality of S7 communication:

– between S7 stations S7-300 and S7-400; – between S7 stations and PC/PG stations with an Ethernet CP.

S7 – 400

Ethernet

Ethernet CP

S7 – 300

Ethernet CP

PUT / GET BSEND / BRECV

WAN *

USEND / URECV

* only TCP/IP

PC/PG with Ethernet CP

Figure 1-3 Nodes Communicating on S7 Connections over Industrial Ethernet

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S7 – 300 / 400

Communication via Ethernet CPs in S7 Stations

S Client and server functionality at one end only (S7 connections

configured at one end)

In the following situations, write and read functions can be implemented with PUT / GET:

– S7 communication over router

PG/PC stations can access S7 stations if the PG/PC stations are connected to a different subnet or subnet type (PROFIBUS / Ethernet) via routers (for example, an IE/PB Link); in this case, S7 stations are servers.

S7 communication is possible over a gateway.

Ethernet

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 Client Server Described in

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) /

C_CNTRL (S7-300)

x x

Documentation /9/

1) you do not need to configure a connection on the server

2) for S7-300

Notice

Please remember the following points regarding data consistency in your user program:

In the CPU of the S7 station, the read or written information is taken from the S7 user program into the operating system or copied from the operating system to the S7 user program in blocks of 8 or 32 bytes (depending on the firmware version).

If information in the word or double-word format is located across such boundaries, data inconsistency may arise during transmission using S7 communication!

For more detailed information, refer to the STEP 7 documentation /9/.

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Communication via Ethernet CPs in S7 Stations

Notes on S7 Communication between PC/PG Station and S7 Station

Applications in a PC/PG station communicate with the S7 station over an OPC interface or SAPI-S7 interface for operator intervention, monitoring and control.

The S7 stations use the integrated communication SFBs/FBs (client and server functionality at both ends).

The following general requirements must be met by a PC/PG station for S7 communication:

S On the PC/PG:

– an Ethernet CP installed – there is an interface for S7 communication installed: SOFTNET S7 for Ind.

Ethernet or S7-1613/ WIN 95, WIN NT, MS-DOS, Windows.

S The CPs in the S7 stations are supplied with a MAC/IP address (use the default

MAC address or set an IP address).

To use S7 communication with the SIMATIC S7 PLC from a PC, address the

required CPU module in the SIMATIC S7 PLC that you want to communicate with in your PC application.

S7 Communication via Routers (one-sided Client and Server Functionality)

It is possible to reach the S7 station from an application (OPC server) of the PC/PG station that is attached to another subnet. The subnets must be connected over a router such as the IE/PB Link. An S7 station or a PC connected to both subnets can also serve as a router.

In this configuration, the S7 station can only be addressed by the PC/PG station as a communications server on S7 connections configured at one end.

The requirements for the configuration of the PC/PG station are identical to those for operation in the same subnet (see above); the CP in the PC/PG station must also have routing capability.

In this situation, configure a one-ended S7 connection to the PC/PG station in the other subnet for the PC/PG station in STEP 7 NetPro. You can then access data in the S7 station in your user program using the functions PUT (writing) and GET (reading).

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1.5 S5-compatible Communication (SEND/RECEIVE

Interface)

Application

Using the SEND/RECEIVE interface, your S7 user program has access to S5-compatible communication with configured transport connections.

Data transmission on a configured transport connection is suitable for S the reliable transmission of related blocks of data between two Ethernet nodes

using – TCP (see /17//19//20/) with ISO-on-TCP connection (see /18/) or TCP

connection;

– ISO transport connection

S simple (unacknowldeged) transfer of related blocks of data (datagram service)

between two Ethernet nodes with UDP (User Datagram Protocol) on IP.

)

The SEND/RECEIVE interface is also suitable for sending E-mail (refer to the manual for the IT-CP /5/).

For TCP applications, there is an active network with IP protocol (see /20/).

ISO Transport Connection

ISO transport provides services for the reliable transfer of data on configured connections. Due to the segmentation of the data, large amounts of data can be transmitted.

Transmission reliability is extremely high due to automatic repetition and additional field check mechanisms. The communications partner confirms reception of data and the sender receives a return value on the SEND/RECEIVE interface.

ISO transport is operated only on Industrial Ethernet and is optimized for high-performance operation at the self-contained manufacturing level.

1The previous name of the SEND/RECEIVE interface was S5S5 connections

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IP (Internet Protocol)

For internetwork data transmission, the following services are available with suitable CPs such as the CP 443-1:

S ISO-on-TCP connection

ISO-on-TCP is intended for reliable, internetwork data transmission. The ISO-on-TCP service corresponds to the TCP/IP standard (Transmission

Control Protocol/Internet Protocol) with the RFC 1006 extension according to layer 4 of the ISO reference model (see /18/).

RFC 1006 extends the TCP protocol by allowing the transmission of blocks of data (“messages”) assuming that both partners support RFC 1006.

S TCP connection

When using the SEND/RECEIVE interface on TCP connections, the Ethernet CP supports the socket interface (for example, Winsock.dll) to TCP/IP found on almost every system (PC or other system).

TCP is intended for reliable internetwork data transmission. The TCP service complies with the TCP/IP standard (Transmission Control

Protocol/Internet Protocol; see /18/).

S UDP connection

UDP is intended for simple internetwork data transmission without confirmation. If the connection is suitably configured, broadcast and multicast frames can

also be sent on UDP connections. To avoid overload due to high broadcast load, the CP does not allow reception

of UDP broadcasts. As an alternative, use the multicast function over a UDP connection. This allows you to register the CP as a node in a multicast group.

SEND/RECEIVE Interface

Data transfer is triggered by the user program. The interface to the user program in the SIMATIC S7 is formed by special SIMATIC S7 blocks of the type FC (functions).

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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 DD D D

PG/PC with Ethernet attachment

Figure 1-5 SIMATIC S7 PLC with Possible Communications Partners on the SEND/RECEIVE Interface

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1.6 FETCH/WRITE Services (Server)

Application

In addition to the SEND/RECEIVE interface, the FETCH/WRITE functionality provides further services for S5-compatible communication on configured transport connections.

The FETCH/WRITE interface is used primarily to attach SIMATIC S7 to SIMATIC S5 and to other non-S7 stations (for example PCs).

S FETCH

The partner on the connection (SIMATIC S5 or non-S7 station) can read system data on the SIMATIC S7 PLC.

S WRITE

The partner on the connection (SIMATIC S5 or non-S7 station) can write system data on the SIMATIC S7 PLC.

From the point of view of the SIMATIC S7 PLC, this is a passive communication function; the communications partner initiates the connection establishment.

For further information, refer to the system documentation of the SIMATIC S5 PLC or the non-S7 station you are using.

Connection Types

To access a station with FETCH or WRITE functions, a FETCH passive or WRITE passive connection must be configured. The following types are possible:

S ISO Transport S ISO-on-TCP S TCP

Coordinating Access Using the User Program

To coordinate access, you can use the FCs AG_LOCK and AG_UNLOCK. With these FCs, you can coordinate access to system memory areas so that no

inconsistent data are created and transferred.

SIMATIC S5

On the SIMATIC S5 station, the FETCH/WRITE services are configured and started by READ ACTIVE/PASSIVE and WRITE ACTIVE/PASSIVE.

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1.7 Networking Stations with STEP 7

Configuring

To allow stations to communicate with each other the networks must be configured in the STEP 7 projects.

Configuring a network or subnet involves the following:

1. You create one or more subnets of the required subnet type in the project.

2. You select the properties of the subnet. Normally the default settings are adequate.

3. You connect the station “logically” to the subnet.

4. You set up connections for communication.

Networking in a Multiproject

Tools

STEP 7 as of Version V5.2 supports configuration in a multiproject. Using a multiproject, for example, you can create a project for distributed editing by

various editors and distribute the stations to the projects according to their editors. To allow this, functions are available for branching and merging (sub) projects.

Interproject subnets and connections can be created.

The SIMATIC Manager provides convenient tools for configuring and documenting networks (also graphically with NetPro).

The chapter describing network configuration in /6/ and the online help system also contain information about configuring SIMATIC S7 networks.

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Variants

Before configuring networks with STEP 7, you should be aware of the various configurations possible in the STEP 7 project. The following configurations are typical for stations networked with CPs:

Variant (examples) Characteristics/Configuration

1 1 subnet – 1 project 2 Additional SIMATIC S5 stations and stations with equipment of other vendors 3 2 or more subnets – 1 project 4 1 subnet – more than one project 5 More than one subnet – more than one project 6 Internetwork connections (TCP)

These variants will be used as a basis to illustrate how real configurations can be created in STEP 7 projects.

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1.7.1 Network/Project Variant: One Subnet – One Project

Configuration of the System

In the simplest case, your system consists of SIMATIC S7 stations connected by

one subnet, for example of the type Industrial Ethernet.

View in a STEP 7 Project

You create an Industrial Ethernet object in the STEP 7 project. Stations created in the same project refer to this object as soon as they are configured as network nodes.

System “Production”

Ethernet (1)

S7-400/1

S7-300/1

S7-300/2

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1.7.2 Network/Project Variant: SIMATIC S5 and Non-SIMATIC Devices on the Subnet

Configuration of the System

In addition to SIMATIC S7 stations, SIMATIC S5 stations and non-SIMATIC devices can be included in your system.

S7-400/1

S7-300/1

System “Production”

Ethernet (1)

S7-300/1

Non-SIMATIC

View in a STEP 7 Project

SIMATIC S5 stations you intend to include in the communication can be selected directly. Non-SIMATIC devices must be entered in the configuration as

Other stations.

SIMATIC S5

S7-300/2

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1.7.3 Network/Project Variant: Two or More Subnets – One Project

Configuration of the System

Due to the different tasks of the stations or due to the extent of the system it may be necessary to operate more than one network.

S7-400/1

System “Production and Management Level”

View in a STEP 7 Project

You can create the subnets in one STEP 7 project and configure the stations for communication.

Ethernet (1)

Ethernet CP

S7-400/2

PROFIBUS CP

PROFIBUS (1)

S7-300/1 S7-300/2

This representation illustrates the following:

S More than one subnet can be managed in one project. S Each station is created once in the project. S Each station can be assigned to more than one subnet by assigning its CPs to

different subnets.

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1.7.4 Network/Project Variant: One Subnet – More Than One (Sub)Project

Configuration of the System

In complex networked systems, during configuration it is sometimes more efficient to manage plant sections in different (sub) projects.

The situation can arise that communication takes place over an interproject subnet and that interproject connections must then also be created.

Example:

System section System section “Production 1”

“Production 2”

S7 400/1

S7 300/1 S7 – 300/2

Organization in a Multiproject

User-friendly and consistent configuration of such communication is supported in STEP 7 as of Version V5.2 with the multiproject.

The functions for multiprojects in STEP 7 allow the following:

S Several projects can be managed in one multiproject and edited separately S Projects can be branched and merged

Two different strategies can be distinguished in a multiproject: S Several employees work at the same time on a multiproject in a networked

environment. The projects of the multiproject are in different network folders. In this case, all connection partners are available for configuring connections.

S7 – 400/2

Ethernet (1)

S7 – 300/3

S One employee manages the multiproject centrally. This person creates the

structures for projects (when necessary locally) and contracts individual projects out for external editing. The central configuration engineer then returns these projects to the multiproject and synchronizes the interproject data with system support and where necessary executes the required interproject functions.

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In this case, agreement is necessary, for example, regarding the assignment of connection names because it will be far easier when synchronizing the projects

to bring connections with identical connection names together. The topic of multiprojects is dealt with in detail in the STEP 7 basic help. Here, you will find information on the following topics:

S Requirements for interproject functions S How to create multiprojects S How to create a new project in a multiproject S How to separate a project from a multiproject S How to include projects in the multiproject S How to synchronize projects in a multiproject S Moving stations within a multiproject (when a station is moved from one project

of a multiproject to another project of the same multiproject (for example using

drag & drop), the interproject connections are retained) S Possible problems in distributed projects and tips on how to avoid them

Possibilities for stations outside the current project

The addition of the multiproject functionality means that the following situations can arise:

S Connection to a partner in an unknown project

The new multiproject functionality allows you to create a connection to a partner

in an unknown project. In this case, you can specify a connection name as a

reference in the properties dialog of the connection. When the projects are

merged, STEP 7 then supports you with automatic synchronization of the

separately configured connections.

The connection remains unspecified until the projects have been merged and

the connections synchronized. Only following this synchronization can the

configuration data be downloaded to the local station without inconsistencies.

You should therefore use this variant when you know that the projects will be

merged in a multiproject. S Specified connections with representative objects

To allow you to create specified connections to stations in a different project (for

example production 2) or that are not managed with STEP 7, you can configure

these stations as other stations(example in the project production 1).

This makes it possible to create consistent, fully specified configuration data

and to download it to the local station.

It is also possible to create specified connections between these stations in

different, independent projects. The stations can then communicate

immediately over the created connections after the configuration data have

been downloaded.

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Use this variant when you want to operate projects separately due to the complexity.

Stations of the type SIMATIC S5 function in just the same way as representative objects.

Merging Projects in the Multiproject:

If you have used the multiproject functions allowing you to use connections to a partner in an unknown project, STEP 7 will automatically attempt to synchronize two separately configured connections.

If you have configured projects with representative objects and want to merge these projects into a multiproject, you have the following options:

S You can leave the representative objects with the configured connections

unchanged.

S You can reassign the connection partner and then delete the representative

objects.

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1.7.5 Network/Project Variant: Several Subnets in Several (Sub) Projects

Configuration of the System

If several network types need to be used and if these need to be managed in different projects due to the different tasks of the stations or due to the large span of the plant, stations can be created as follows:

S Using (sub) projects in the “multiproject” S by configuring “Other stations / SIMATIC S5” in the other project.

Ethernet (1)

S7 – 400/1

PROFIBUS (1)

Ethernet CP

PROFIBUS CP

S7 – 300/1

Cell level = (sub)project 1

Cell level = (sub)project 2

S7 – 300/2

Organization in a Multiproject

If you use a multiproject organization, follow the steps below to connect the S7-400/1 station to the PROFIBUS (1) subnet:

Create a subnet of the type PROFIBUS in both subprojects and merge these two subnets in NetPro.

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Representative Objects for Stations Outside the Current Project

If you do not want to use the multiproject functions, you can fall back on the use of representative objects as used previously.

To be able to network the representative objects, you must once again create a subnet of the type PROFIBUS in both projects as shown in the example here.

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1.7.6 Network/Project Variant: Connections between Subnets (TCP/IP)

Configuration of the System

If connections are required to stations on network structures connected by routers due to the differing tasks of the stations or the large span of the network, the stations in the other project can be reached by configuring “Other Stations”.

S7 – 400/1

Ethernet CP

Ethernet (1)

WAN Internet *

View in a STEP 7 Project

If the stations in the two networks are managed in the same project, the networking appears as shown below in NetPro.

Router *

Ethernet (2)

S7 – 400/2

Ethernet CP

S7 – 300/1

* only TCP/IP

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To attach a SIMATIC station to Industrial Ethernet via the Ethernet CP, configure the CP with the NCM S7 configuration software. The chapter explains the following:

S How the CP is configured in the STEP 7 project S How the various network configurations are managed (setting up access to

other systems)

S How to control and supply the CP with data using NCM S7

You will find further information in the following sources: S When installing the Ethernet CP, please refer to the instructions in the manual

/1/ supplied with the Ethernet CP. This also contains further information about the performance of the Ethernet CP .

S For more information about the functions and applications of STEP 7 in which

the NCM S7 option is integrated, please read the following topics:

– For using the help functions, read the section Working with STEP 7 in /6/. – Configuring and assigning parameters to modules in /6/ – Configuring networks in /6/. You will find this information in the online help

with integrated in STEP 7 by selecting Help " Contents.

S You will find examples of configurations in the Primer /3/.

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2.1 General Information About the NCM S7 for Industrial Ethernet Option

Installation

Please follow the instructions in the README file when installing the NCM S7 for Industrial Ethernet option on your PG/PC under STEP 7.

Functions

NCM S7 consists of the following: S CP-specific index dialogs that you call using the properties dialog box of the

modules.

S Dialogs for the connection configuration S Diagnostic functions that you obtain as follows:

Operation

– Using the “Diagnostics” tab in the properties dialog – Using the standard Start menu of Windows with which you can call the

SIMATIC program group

S Functions displayed with SIMATIC " NCM... in the Start menu of Windows:

– Diagnostics – Help for functions (FCs) – “Readme” file with current information about NCM – Firmware loader

Operating and handling the software package is as explained in the STEP 7 user manual /6/.

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2.2 Procedure

A CP is managed in an S7 project just as the other modules. You use STEP 7 to configure the hardware and create and manage the user software (see /6/).

Configuring a CP involves the following basic steps (the broken lines indicate options):

Create the Industrial Ethernet subnet (see 2.2.1)

Enter the Ethernet CP in the hardware configuration

Installing and Starting the Ethernet CP with STEP 7

Check or set the network properties

(see 2.2.2)

Attach the Ethernet CP to the Ethernet subnet

(see 2.2.2)

Display the network attachments of a station (see 2.2.3)

Make further CP settings (see 2.2.4)

Configuring communication connections (Chap. 4) – S7 connections /6/ – ISO transport connections – ISO-on-TCP connections – TCP connections – UDP

Configuration data in the STEP 7 project

alternative: Program communication connections (see Chapter 5)

Programming the SEND/RECEIVE interface (see Chapter 3)

User programs in the STEP 7 project

Download the configuration to the PLC (see 2.4).

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2.2.1 Creating an Industrial Ethernet Subnet

Aims

To be able to attach the SIMATIC stations to a subnet, you create the subnet in your project. This means that all the parameters for the entire subnet are managed centrally.

Procedure

It is advisable to create the subnet before you configure the stations since the assignment of the SIMATIC stations is then performed largely automatically.

It is also possible to create the subnet at a later point in time when configuring a CP. This is explained in more detail later in the chapter.

Follow the steps outlined below:

1. Select the project in the SIMATIC Manager.

2. Select Insert " Subnet " Industrial Ethernet. Result: An object of the type network is created in the project. This allows all

the SIMATIC stations created in the project to be attached to this subnet.

Figure 2-1 Project with Assigned Ethernet Network

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3. If you prefer a NetPro graphic network display, select the network object “Ethernet” and confirm with Edit " Open Object.

Figure 2-2 Graphic Network Representation (here showing stations not yet networked)

From this graphic representation, you can also activate all the functions for networking and configuring connections with the Ethernet CPs.

You can also create the subnets in NetPro! Open the catalog using the menu command Insert " Network Objects.

Organization in a Multiproject

If you use the multiproject form of organization, this has the following effects when creating subnets.

You create subnets initially in the subprojects as described above. To be able to network S7 stations, you will, for example, need to create a suitable subnet of the type Industrial Ethernet in each subproject.

If this is physically a subnet that extends beyond the boundaries of the subproject, you should first merge the subnets before configuring the communication connections between the S7 stations.

If you do not merge the subnets, NetPro assumes that you are connecting the subnets via routers and displays warning messages to this effect.

Properties of Merged Subnets (Multiproject)

When you merge subnets, transferable subnet properties such as the subnet ID of the master subnet will be transferred to the other subnets of the group.

Some parameters relate specifically to a subproject and remain unchanged; these include, for example, descriptive parameters such as the name, author, and any comments.

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Notice

Preserving Consistency in Merged Subnets After merging the subnets, you should check the consistency throughout the multi-

project using the menu command Network > Check Interproject Consistency in NetPro to make sure that there is consistency throughout the multiproject. This check detects, for example, S7 subnet IDs that are not unique within the multiproject.

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2.2.2 Entering an Ethernet CP in the Hardware Configuration

Procedure

By installing and assigning the Ethernet CP in the rack of a SIMATIC station, you establish the logical attachment between the Internet CP and the subnet.

1. Select the station in your project that you want to attach to Industrial Ethernet using an Ethernet CP.

2. Select the CP in the hardware configuration just like any other module by selecting it in the hardware catalog and then selecting the slot in the rack.

You select CPs in the hardware catalog using a short text and the order number. Once you have installed NCM S7, the CPs are available in the catalog.

Result: The CP is assigned to the SIMATIC station. For information about the permitted slots, refer to /1/. How to configure a module with STEP is described in detail in /6/.

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Subnet Attachment

To allow you to activate the network attachment of the Ethernet CP, the SIMATIC Manager displays the following dialog:

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Note

You can open the dialog for setting the interface at any time from the Properties dialog of the CP in the “General” tab.

1. If you have not yet created a subnet in the project or have not yet created the selected subnet, you can now create a subnet. To do this, select the “New” button.

Result: An object of the type network is created in the project.

2. Check the addresses and if necessary change them. The system enters the next free address automatically.

You will find detailed information on the address ranges in the online help. Please note the following additional information:

– MAC address

The latest Ethernet CPs are supplied with a default MAC address (address printed on the module). To be sure that you have a unique address assignment, do not enter a MAC address in the configuration (the option is deactivated). This means that the module automatically uses the factory-set address. If you want to use ISO services, we recommend that you enter the address printed on the module in the configuration.

Note

The “IP address” and “Subnet mask” input fields have no significance for ISO transport (option “IP protocol being used”).

3. Select the required subnet type in the “Subnet” list box.

4. You can display the properties dialog box for the selected subnet by clicking the Properties button.

5. Enter information specific to the subnet node in the “General” tab.

6. You must finally confirm your input with OK, otherwise the networking is not entered (refer to Point 3.).

Result: The CP is now configured as a network node for the corresponding S7 station.

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Setting Addresses in the Configuration and Addressing for the First Time

The address settings described here are made on the CP only after you download the configuration data.

With the latest Ethernet CPs, the situation is as follows: To be able to reach the CP using these addresses before you download the

configuration data, you can address the CP using its default MAC address and then supply it with project-specific address information.

How to do this is described in Section 2.3.

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2.2.3 Displaying the Network Attachments of a Station

Procedure

You can easily get an overview of the network attachment configurations of a SIMATIC station in one of the following ways:

S A graphic overview in NetPro; S An overview in table form in the Properties dialog of the station

Graphic Overview in NetPro

The NetPro view provides you with a good overview of the networked stations: Follow the steps below:

1. Double-click one of the network objects, for example Ethernet in your project in the SIMATIC Manager.

Figure 2-3 NetPro View of a Subnet of the Type Industrial Ethernet

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Overview in Table Form

The table view in the Properties dialog of the station provides a detailed overview of the components used for network attachment.

Follow the steps below:

1. Using the SIMATIC Manager, select the station in your project that you want to check.

2. Select the Object Properties using the menu option Edit " Object Properties or by double-clicking the station symbol.

3. Select the “Interfaces” tab.

Result:

Figure 2-4 “Interface” Tab in the “SIMA TIC 300/400” Properties Dialog Box

In the displayed dialog, you can see the subnet attachments that were configured for the SIMATIC station.

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2.2.4 Setting Further CP Properties

Overview

In addition to the network attachment, you can also make further settings for the specific module or you can call functions.

1. Select the Ethernet CP in the hardware configuration.

2. Select Edit " Object Properties. Depending on your type of CP, the dialog includes other tabs in addition to the “General” tab described in Section 2.2.2:

Tabs Settings for

General Interface

Addresses Interface parameters for the user

program

Options Time-of-day synchronization

Data transfer Replace module without PG Ethernet profile for fault-tolerant connections Individual network settings Send keepalives for connections Multiplex OP connections / reserve internal CPU

connection resources

Time-of-Day Synchronization SIMATIC mode

NTP mode (NTP: Network Time Protocol) User Specify user permissions for IT functions Symbols

DNS parameters

Diagnostics Call NCM diagnostics (special diagnostics /

Addressing Select the station to initialize

Symbolic access to variables using IT

functions

Specify the address for the domain name server for E-mail services

module diagnostics)

Assign configured IP parameters IP Access Protection Edit the IP access list IP Configuration Set the IP address

Please read the description of the Properties dialog of the CP in the integrated

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help. The functions are explained in detail there.

Installing and Starting the Ethernet CP with STEP 7

Addresses Tab

The Addresses tab displays the address at which the module can be addressed by the user program. You require this address when calling the FCs for transport connections –> see Chapter 6.

Notice

Please note the following notes on S7-300 stations: If you selected the “Update OB1 process image cyclically” option in the CPU confi-

guration (default), you must set the module base address of the Ethernet CP outside the process image (base addresses in the “Addresses” tab).

Example: If the size of the process image selected for the CPU is 1024 (0...1023), the address for the Ethernet CP must be set equal to or higher than 1024.

Options Tab

Depending on the CP type, you can make the following settings:

Table 2-1 Settings in the “Options” Tab

Option

Meaning / Effect

S Time-of-Day Synchronization Here, you decide whether the CP passes on time-of-day frames or

not. You require this function if you have several CPs in a station since only one CP (on the same network) is permitted to forward the time synchronization messages.

Note

The time-of-day synchronization function does not exist for all module types.

S Data transfer > 240 bytes With this option, you specify whether or not the CP will support jobs

with a data length of more than 240 bytes (for S7-300 stations).

Notes

S The transfer of more than 240 bytes of data is supported by

newer version CPs. Please note the information in the product information bulletin / manual of the Ethernet CP.

Please note the information in Section 6.1 on the newer CP types.

S Remember that with this configuration on an S7-300, one

connection resource (free connection for S7 functions) of the S7-300 CPU is used. CPU connection resources are also used, for example, by S7-300 CPs, in the FMS mode or by Pg. and Pos. For more detailed information about the maximum connection resources, refer to /13/ and /7/.

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Table 2-1 Settings in the “Options” Tab , continued

Option Meaning / Effect

S Replace Module without PG With this option, you can have the configuration data of the CP stored

on the CPU. If you then replace CP, the configuration data for the new CP are downloaded automatically from the CPU when the CP is started up.

If you select this option, the configuration data are stored long-term on the CPU instead of in the EPROM of the CP. Remember, however, that long-term storage on the CPU is only safe from power outages if the CPU is protected by battery backup or by using an S7 Memory Card.

Note

If you store the configuration data on the CPU, please read the note below.

The following functions do not modify the configuration data on the CPU:

S Reset module memory S Resetting to factory settings

(using the target system selection in

S Ethernet Profile for

Fault-Tolerant Connections

S Assigning an IP address

the SIMATIC Manager or the properties dialog in HW Config or NetPro)

If you subsequently upload the configuration data from the CPU to a PG you will always object the configuration data that were previously on the CP (with parameters, connections, IP address).

1) Note: You should only use the assign IP address function during commissioning; in other words, before downloading the configuration data.

Select this profile if you use fault-tolerant communication in your system. Fault-tolerant communication means that Industrial Ethernet is designed with redundancy and that you have configured fault-tolerant S7 connections.

If you select the Ethernet profile for fault-tolerant connections here, the time response of the S7 connections is adapted. As a result, breakdowns of a connection are detected more quickly and the failover to redundant connections is faster.

Note

Select the Ethernet profile for fault-tolerant connections only when you actually use fault-tolerant S7 connections. Otherwise you must expect your system to be more susceptible to problems since, for example, the number of transfer or connection establishment attempts is reduced compared with non-redundant systems.

S Individual Network Settings Here, you can make fixed network settings, when necessary. As

default, “Automatic Setting” is selected and this setting generally guarantees problem-free communication in most situations.

If problems occur in communication (for example, when connections are not established or when there are often disturbances on the network), the reason may be that the selected or automatic network settings are not suitable. You can then select a network setting to suit your network configuration.

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Table 2-1 Settings in the “Options” Tab , continued

Option Meaning / Effect

S Send Keepalives for

Connections

S Multiplex OP Connections /

Reserve Internal CPU Connection Resources

Here, you can set the interval at which keepalives are sent to the partner of a communications connection. This setting decides the latest time after which the failure of a communications partner is detected.

For all connection-oriented services, the Ethernet CP is configured so that keepalives are sent. This guarantees that connections are closed if a communications partner fails and that the connection resources are released. The setting made here applies to all TCP and ISO-on-TCP connections operated via the CP; a connection-oriented setting is not possible.

Possible values: Default Setting: 30 seconds Turn keepalives off 0 seconds Maximum value: 65535 seconds Notes / Recommendations: Remember that the keepalive mechanism can keep underlying

connections established (for example, an ISDN telephone connection) although no user data are actually being transmitted. If this is not required, set the interval so high that the underlying connection is closed down when no further user data are sent before a keepalive is sent.

To attach TD/OPs or HMI devices, you can optimize the connection resources on the S7-300 CPU by having up to 16 of these devices communication on a single CPU connection resource (multiplex mode).

If you do not use this option, the number of operable TD/OPs or HMI devices depends on the number of available connection resources of the CPU you are using.

As default, this option is deactivated. This means that a CPU connection resource is used for multiplex only when necessary.

Configured S7 connections over the CP use the same multiplex channel as you use for multiplexing the HMI connections. If you configure S7 connections, this means that one CPU connection resource is already used.

Please note: PG connections do not use the multiplexer; if you use a PG, one connection resource is always occupied.

Note on Programming: When you use the multiplex mode, you must specify the rack/slot assignment of the CP for addressing on TD/OP/HMI connections instead of the rack/slot assignment of the CPU!

Applications (for example ProAgent) that require block-related messages (Alarm_S: SFC17-19) are not supported in the multiplex mode.

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Time-of-Day Synchronization Tab

In this tab, you can make the settings for one of the two synchronization modes explained below:

S SIMATIC mode

If the CP receives MMS time-of-day frames, its local time is synchronized providing the NTP mode was not configured (MMS = Manufacturing Message Specification).

The advantage of this mode is the accuracy that is generally higher than achieved with the NTP mode.

S NTP mode (NTP: Network Time Protocol)

In the NTP mode, the CP sends time queries (in the client mode) at regular intervals to the NTP server in the subnet (LAN). Based on the replies from the server, the most reliable and most accurate time is calculated and the time of day on the station is synchronized.

The advantage of this mode is that the time of day can be synchronized beyond the boundaries of the subnet.

Installing and Starting the Ethernet CP with STEP 7

Diagnostics Tab

In the “Diagnostics” tab, you can startNCM S7 Diagnostics. See Chapter 7 Diagnostics for a description of the diagnostic functions themselves.

Addressing Tab

In the “Addressing” tab, you can assign the previously configured IP address and IP parameters to the CP.

This is necessary before the configuration data can be downloaded to the CP over Ethernet.

For a detailed description, refer to Section 2.3.

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IP Access Protection Tab

Using IP access protection gives you the opportunity of restricting communication over the CP of the local S7 station to partners with specific IP addresses. Partners

V 5.2.1

you have not authorized cannot access data of the S7 station over the CP using the IP protocol.

In this tab, you can activate or deactivate IP access protection and can enter IP addresses in an IP access control list (IP-ACL).

As default, IP access protection is deactivated. S IP access protection for configured connections with specified partners

If you want to restrict access to the precise set of partners you specify during connection configuration, you simply need to activate access protection. In this case, you do not need to enter IP addresses in list.

Remember, however, on unspecified connections, all other IP addresses are unauthorized and are rejected.

IP access protection relates to all connection types handled using the IP protocol (TCP, ISO-on-TCP, UDP)

S IP access protection for partners with specific IP addresses

To allow IP access for specific IP addresses, enter these IP addresses in the IP access control list.

The IP addresses you specify when you configure the connection always belong to the permitted IP addresses and do not, therefore, need to be entered explicitly in the IP-ACL.

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IP Configuration Tab

In this tab, you can decide the route and the method with which the IP address of the local S7 station is obtained and assigned.

V 5.2.1

Table 2-2 Options in the “IP Configuration” Tab

With the options available here, it is also possible to assign IP addresses dynamically outside the STEP 7 configuration.

Installing and Starting the Ethernet CP with STEP 7

Option

S Set IP address in the

“Properties – Ethernet Interface” dialog

S Obtain an IP address from a

DHCP server

Meaning / Effect

This option is the default. It means that the IP address is set during the networking of the

Ethernet CP. The IP address of the CP is therefore fixed in the configuration.

You must select this option if you want to configure specified connections.

If you select this option, the IP address is obtained from a DHCP server when the S7 station starts up.

The DHCP server is informed of the MAC address of the CP or the client ID that you can enter here.

Requirement / Restriction: If you select this option, it is initially not possible to create a fully

specified connection in the STEP 7 project because the local IP address is not known.

You must therefore select “unspecified” with passive connection establishment as the connection type.

Please not the following: If the connections are configured over the interface in the user

program, you must use the option “Set IP address in the user program” as described below. This also applied if the IP address is obtained from a DHCP server.

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Table 2-2 Options in the “IP Configuration” Tab, continued

Option Meaning / Effect

S Set IP address in the user

program

S Set IP address using a

different method

With this option, you specify that the IP address is set over a user program interface (function block IP_CONFIG). This allows the IP address to be supplied dynamically during operation.

In this situation, communication connections are created only over the user program interface; configuring connections using STEP 7 is not possible (relates to connections over IP: TCP, ISO-on-TCP, UDP).

This setting does not preclude the IP address being obtained from a DHCP server. It is possible for the user program to instruct the module to obtain an IP address in this way.

Further information: Read the section “Programmed Communication Connections” and

refer to the example in the appendix of the manual. With this option, you specify that the IP address is set by other

services outside STEP 7. In this situation, configuring connections using STEP 7 is not possible

(relates to connections over IP: TCP, ISO-on-TCP, UDP).

Note

You can query the IP address actually being used with NCM S7 Diagnostics.

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2.2.5 “Substitute Objects” in the STEP 7 Project

Overview

Communication connections can be configured fully when the communications partners are available in the current project. For the stations on the Ethernet subnet, whose configuration data were not created in STEP 7 or whose configuration data are not managed in the currently active project, the following substitute objects can be created in the project:

S SIMATIC S5 stations S PG/PC S Other stations

– for devices of other manufacturers – for SIMATIC S7 stations in another project (not necessary in a multiproject)

Note

Instead of creating substitute objects, you can also configure unspecified connections for connections to the stations listed above.

In the Properties dialog of these connections, you must then specify the full partner address. These partners do not appear in the NetPro plant view.

Plant “Production 1”

S7-400/1

Ethernet subnet (1)

Plant “Production 2”

S7-400/2 S7-400/4

PC/PG

Non-Siemens device

S7-400/3

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Procedure

To enter a substitute object in the project, following the steps below:

1. Select the project in the SIMATIC Manager.

2. Select the menu command Insert " Station " and then as necessary

Other Station, PG/PC or SIMATIC S5. Possible result: the selected object is created in the project.

Figure 2-5 Project With Substitute Objects Configured

Attaching Non-S7 Stations to the Subnet

The next step is to assign the substitute objects to the subnet, as follows:

1. Select the required object in the project and select Edit " Object Properties.

2. In the Properties dialog box that is displayed select the “Interfaces” tab and click the “New” button (for example “Other Station”.

Result: The New Interface – Type Selection dialog box is displayed.

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Figure 2-6 Selecting the Subnet Type for “Other Station” (Example)

3. Select a subnet. Result: The “Properties – Ethernet Interface” dialog is displayed. Here, you can

select the subnet, connect the station to the network and set the address (MAC, IP). All the SIMATIC stations in the project can establish communication relationships to this substitute object.

The addresses (MAP/IP) configured for the substitute object here must also be set on the station using the appropriate tool, for example COM 1430.

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2.2.6 Configuring Communication Services

Setting Up Connections

You must set up connections for the connection-oriented services supported by the Industrial Ethernet CP, see also the Table in Section 1.2.

S S7 connections

see the STEP 7 user manual /6/

S ISO transport connections

see Section 4.4

S ISO-on-TCP connections

see Chapter 4.5.

S TCP connections

see Section 4.6

S Connections for UDP

see Section 4.7.

S Interconnections for PROFInet communication

see manual Component based Automation – configuring plants with SIMATIC iMap /23/

The information in the STEP 7 user manual /6/ in the chapter “Creating Communication Connections Between Two Programmable Modules” also applies to the additional types of connection possible with the CPs.

You will find this information in the online help with integrated in STEP 7 by selecting Help " Contents. Select the topic “Configuring Connections and Data Exchange.

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2.3 Assigning Addresses for the First Time (Applies to Latest CPs)

Meaning of the Address Assignment – MAC Address and IP Address

The CP ships with a factory-set MAC address. Without further configuration, the device can only be accessed over the Ethernet port using this MAC address.

In its original state, you can already use the following functions via the CP using the ISO protocol and the factory-set MAC address:

S Download the defined configuration to the CP or CPU S Run diagnostics on the CP or CPU

Before you can download defined configuration data to the device using an IP address, you must first assign an IP address to the CP.

Assigning the Address – Options and Recommendations

There are three ways of assigning this address in STEP 7: S Addressing by selecting the target system in the SIMATIC Manager

This option allows you to assign the address without having to set up a STEP 7 project. This is useful, for example, if you want to download defined configuration data you created offline to the S7 station.

This is described in Section 2.3.1.

S Addressing using the properties dialog in HW Config or NetPro

This option assumes that the CP was networked in STEP 7. The advantage of this method is that the IP parameters set during configuration in STEP 7 / NetPro can be used.

In the “Addressing” tab, you assign the previously configured IP address and IP parameters to the CP.

This is necessary before the configuration data can be downloaded to the CP over Ethernet.

This is described in Section 2.3.2.

S Downloading configuration data using the ISO protocol

Another option is to download configuration data with a defined IP address using the ISO protocol (see above).

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Requirements

Before you can use the addressing described here, the CP must be obtainable online, which means:

S An attachment to the Ethernet LAN must already exist; there must be no

routers between subnets in the path.

S The Ethernet port of your PG/PC must be accessible to STEP 7.

Notice

The options for assigning an address as described here are available only if you have a module that can be reached using the default MAC address; such modules must support the PST (Primary Setup Tool) function. Please refer to the information in the relevant manual /1/.

2.3.1 Addressing by Selecting the Target System in the SIMATIC Manager

Follow the steps below to assign the IP address the first time:

1. Open the SIMATIC Manager

2. Select the menu command PLC " Assign Ethernet Address.

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3. Start a network search for available modules by selecting the “Browse...” button.

4. Select the CP with the matching MAC address from the components listed.

5. Enter the required IP parameters and assign them to the CP.

Result: The CP is now accessible on Industrial Ethernet using the IP address.

Note

You will find further detailed information on this procedure in the STEP 7 online help.

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Alternative Procedure

You can also follow the steps outlined below in the SIMATIC Manager:

1. Use the menu command PLC" Display Accessible Nodes to display the nodes that you can access over Industrial Ethernet.

2. Select the required node in the list displayed.

3. Then select the menu command PLC" Ethernet Address. Result: The previously selected node is entered directly into the “Addressing”

dialog. You cannot modify the MAC address of the node.

4. Enter the required IP parameters and assign them to the CP (see above under STEP 5.).

Result: The CP is now accessible on Industrial Ethernet using the IP address.

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2.3.2 Addressing using the Properties Dialog in HW Config or NetPro

Follow the steps below to assign the IP address the first time:

1. Open the SIMATIC Manager.

2. Define the configuration of your S7 station with the appropriate components in HW Config in an existing or newly created project.

3. When you create the CP, network it with an Industrial Ethernet subnet. When you create the CP in HW Config, the necessary dialog is displayed in

which you can network the device and assign the IP address.

4. Select the “Addressing” tab in the properties dialog of the CP you want to address.

The tab displayed is identical to the dialogs illustrated in Section 2.3.1.

5. Start a network search for available modules by selecting the “Browse...” button.

6. Select the CP with the matching MAC address from the components listed.

7. Assign the IP parameters taken from the networking to the CP by clicking the relevant button.

Result: The CP is now accessible on Industrial Ethernet using the IP address.

Note

You will find further detailed information on this procedure in the STEP 7 online help.

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2.4 Downloading the Configuration Data to the Target System

Principle

The configuration data of the Ethernet CP are downloaded from the hardware configuration. All the configuration data of the S7 station are downloaded including the central configuration, all relevant DP master systems and all parameter settings.

The data of the configured connections must also be downloaded, see below.

Type of Interface

You can download the configuration data to the S7 station on the following paths (interfaces):

S MPI interface

You can use this interface to download configuration data or when assigning a MAC/IP address for the first time (node initialization – for details, refer to the manual /1/ “Assigning Addresses for the First Time”).

S Industrial Ethernet

Here, you use the PG mode of the Ethernet CP in the S7 station (see also Section 1.3).

Depending on the PG/PC interface used by the station on which you create your configuration, you can download the defined configuration data to the S7 station over the TCP/IP interface or over the ISO interface of STEP 7.

– When you download over the IP interface, the CP must already have been

assigned an IP address; refer to Chapter 2.3.

– When you download over the ISO interface, you can use the preset MAC

address. However, please note the following:

Note

If you want to download the configuration data over the ISO interface to a CP with an unchanged, factory-set MAC address and you have configured a different MAC address in your STEP 7 project, you must start the download in NetPro or HW Config; this is the only way you will be prompted to enter the current MAC address. The SIMATIC Manager, on the other hand, aborts the download if the target station cannot be reached.

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Procedure

To download the configuration data to the S7 station, follow the steps outlined below:

1. Open the “Set PG/PC Interface” dialog box in the Windows Control Panel.

2. Set the PG/PC interface according to the CPs available on your PG and according to the bus attachment (interface parameter assignment used).

For more detailed information, refer to the integrated help system.

3. Change the CPU to the STOP mode (regardless of the type of interface – see above).

4. Select the menu command PLC " Download to Module.

STEP 7 then guides you through dialog boxes. Note the additional information in the “STEP 7 User Manual”, Chapter “Configuring and Assigning Parameters to Modules” /6/.

Deactivating the MAC Address in the Configuration

If you deactivate the use of the MAC address when you are configuring the CP, the CP can be reached via the preset MAC address, however you cannot define any ISO transport connections or S7 connections over ISO connections in your configuration.

Saving the Configuration Data in Non-Volatile Memory

You can download the configuration data step-by-step or all at once. If you download step-by-step, you will be prompted to start the download function separately for each module. You must select this method if you want to save the configuration data in non-volatile memory on the Ethernet CP. In this case, select the “Copy to ROM” button in the “Download” dialog for the CP.

Downloading the Configured Connections

To download configured connections, you use a corresponding download function in the connection configuration (NetPro).

Notice

If you have assigned a new address to the Ethernet CP or have configured connections, you must always download the connection configuration again.

Remember that you also make suitable address adaptations for the other stations or “substitute objects”.

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Relocating the CP in the Hardware Configuration

If you are using communication services with configured connections, the connection IDs also identify the slot of the CP. If you “drag” a CP you have already configured to a different slot, note the following:

Notice

If you drag the CP to a different slot, the data of the connection configuration are automatically updated. The data of the connection configuration must, however, be downloaded again!

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SEND/RECEIVE Interface in the User Program

This chapter explains the following:

S How to send and receive data. S Which data areas can be used on the S7 CPU. S How to program the SEND/RECEIVE interface in the user program.

You will find further information in the following sources:

S For programming and configuring nodes for connections (for example a

S The FCs for programming connections are described in Section 6.3. S Configuring the Ethernet CP with NCM S7 is described in Chapter 4. S Programming communication connections over the interface in the user

SIMATIC S5 PLC with the CP 1430 TCP, PC with CP 1613), please refer to the appropriate manuals.

program is described in Chapter 5.

Sample programs: Sample configurations and programs are available for the SEND/RECEIVE

interface described here: S In the sample project PROJECT_ETHERNET that you can start immediately

after installing NCM S7; for a description, refer to the Primer /2/.

S On the Internet as downloadable sample projects; refer to the information in

Appendix C “Support and Training”.

The Quick Start CD that can be ordered separately is a treasure-trove of sample programs and configurations.

You can order this directly over the Internet at:

http://www4.ad.siemens.de/view/cs/de/574211

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3.1 How the SEND/RECEIVE Interface Works on the CPU

Functions (FCs)

The following functions (FCs) are available for handling communication on connections:

S AG_SEND/AG_LSEND

This block takes the user data from the specified user data area and transfers it to the Ethernet CP.

S AG_RECV/AG_LRECV

This block transfers received user data to the user data area specified in the call.

The diagram below illustrates the situation. Using the FCs AG_SEND/AG_LSEND and AG_RECV/AG_LRECV, the user program instructs the Ethernet CP to send or receive data on the configured connection.

Ethernet station SIMATIC S7

Ethernet CPCPU

CP STEP 7 user program

User data areas

AG_SEND

AG_RECV

Figure 3-1 Interaction of the CPU and Ethernet CP on Connections

database

User data buffer

send

receive

Amounts of Data

The Ethernet CP can transfer the amounts of data shown in the table below per job on one connection:

Communication connection

Table 3-1

ISO Transport ISO-on-TCP TCP UDP

Sending 8192 bytes 8192 bytes 8192 bytes 2048 bytes

Receiving 8192 bytes 8192 bytes 8192 bytes 2048 bytes

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3.2 Programming the SEND/RECEIVE Interface

Principle of Job and Data Transfer

The user program triggers the transfer of the user data areas with FC calls and monitors the transfer by evaluating the return codes of the FCs.

The following parameters are transferred when the FCs are called:

S The number of the connection (ID) S The location of the user data area in the CPU

For detailed information about the call interface see Chapter 6.

Purpose of the FCs

Calling the function blocks has the following effects: S The user data area is transferred to the Ethernet CP or received from the

Ethernet CP.

Procedure

S The execution of the job is confirmed positively or negatively in a status

message.

Program the SEND/RECEIVE interface in the user program as follows:

1. Use the following functions (FCs) for data transmission on connections: – AG_SEND / AG_LSEND for transferring the user data area to the Ethernet

– AG_RECV / AG_LRECV for entering data received from the Ethernet CP in

the user data area

2. Evaluate the following bits in the FCs: – for AG_SEND / AG_LSEND the parameters DONE, ERROR, STATUS – for AG_RECV / AG_LRECV the parameters NDR, ERROR, STATUS

Notice

Connection numbers (IDs) must be taken from the configuration when programming. To ensure correct parameter settings for the block calls, The LAD/STL/FBD editor in STEP 7 provides you with the option of accepting all the relevant parameters from the hardware configuration (HW Config) and from the connection configuration. For more information, refer to Section 6.2

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ÇÇ

Calling FCs in the CPU Program

One possible sequence for FCs in conjunction with the organization and program blocks in the CPU cycle is illustrated in the following diagram.

Read PII

User program

AG_RECV

AG_SEND

AG_RECV

AG_SEND

Read in the received data of the connection

Communication connection

Transfer send data for the connection

AG_SEND

Write PIQ

Legend:

Sequence of the CPU cycle

The different shading shows which connections and FC blocks belong together.

Figure 3-2 Typical Sequence of Function Calls in the CPU Cycle

The following points are illustrated by the diagram: S The user program consisting of any number of blocks (OBs, FBs or FCs –> see

also /6/ accesses several connections (Figure 3-2 illustrates three connections).

S At various points (event and program-controlled) the user program sends data

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on a connection using the AG_SEND call.

S At various points in the CPU cycle, the user program accepts the data received

on the connection using an AG_RECV call.

Note

The blocks can also be called more than once in a cycle for the same communication connection.

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3.3 Data Exchange S7 CPU <–> Ethernet CP

The Ethernet CP processes the send and receive jobs independent of the CPU cycle and requires one transmission time. The interface to the user program with the FCs is synchronized by an acknowledgment. Two situations must be distinguished:

S The CPU cycle is faster than the transmission time. S The CPU cycle is slower than the transmission time.

Note

Please refer to the sequence charts for the FCs in Chapter 6. These charts show how to handle the SEND/RECEIVE interface in the user program for problem-free data exchange.

Remember the points below about the CPU cycle and transmission time.

FC Calls Faster than the Transmission Time

If a block is called again in the user program before data were transferred or received, the procedure is as follows on the interface of the FCs:

S AG_SEND/AG_LSEND:

No further job is accepted until the transmission of the data on the connection has been acknowledged by the Ethernet station. During this time, the user program receives the message “job active” until the Ethernet CP can accept the next job on the same connection.

S AG_RECV/AG_LRECV:

The job is acknowledged with the message “no data available yet” if there are no received data on the Ethernet CP. The user program receives this message in the CPU cycle until the Ethernet CP has received data again on the connection.

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FC Calls Slower than the Transmission Time

If a block is called again before the data were completely transferred or received, the procedure is as follows on the interface of the FC blocks:

S AG_SEND/AG_LSEND:

The job is positively acknowledged. The Ethernet CP is ready to receive a new send job (at the earliest however with the next call).

S AG_RECV/AG_LRECV:

The job is acknowledged with “New Data Received” when the data have been transferred to the user program. Following this, the FC call can be repeated.

Notice

Remember that resource shortages can occur if the processing speeds on the sender and receiver are not the same (sender faster than receiver).

The sender receives a message from the FCs if problems occur (“No resources on the destination station”).

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3.4 Additional Information

3.4.1 Programming Data Transfer on TCP Connections

Purpose of TCP Connections

TCP connections should be used above all for connections to systems of a different type if they do not support RFC1006.

For communication between devices of the SIMATIC family, you should use the more convenient ISO-on-TCP connections! The following sections explain certain special points to note.

Special Features

S Block types (FC calls)

Use only the following functions (FCs) for data transmission: – With the S7-CPs for S7-400, you must use FCs AG_LSEND (FC 50) and

AG_LRECV (FC 60) on TCP connections!

– With the latest S7-CPs for S7-300, you also use FCs AG_SEND (FC 5) and

AG_RECV (FC 6) for TCP connections.

S Frame length

On the TCP connections, the protocol contains no information about the end of a message and start of a new message.

The receiving station must therefore know how many bytes belong to a message and transfer an ANY pointer corresponding exactly to this length when FC AG_LRECV is called. (Example: if 100 bytes of data are always transferred, the ANY pointer could appear as: P#DB100.DBX 0.0 Byte 100)

If you want to receive data with a variable length, follow the steps below: Include information on the length of the user data in the frame before the actual

user data. Initially, you should only evaluate the length information on the receiving station. Fetch the appropriate length of user data in another receive job by specifying an ANY pointer of the required length on the FC interface for fetching the actual user data.

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3.4.2 Recommendations for Use with a High Communications Load

Overview

The points below will help you to avoid overload situations on your CPU when using the Ethernet CPs.

In particular when you replace an older CP with a newer CP and are then confronted with overload problems, you should check your application for the pitfalls outlined below.

Known Problems

S The functions for sending and receiving (FC5/FC6 or FC50/60) are often called

cyclically in OB1. This leads to constant communication between the CPU and CP. As a result, other types of communication such as PG functions cannot be executed or only very slowly.

Remedy

S HMI systems access data of the CPU too often using S7 functions. This slows

down communication generally and there may be a lack of resources when SEND/RECEIVE FCs are called cyclically in OB1.

The recommendations below will help to avoid these situations: S Do not call communication blocks cyclically in OB1!

Communication should be called time-controlled in a suitable cyclic-interrupt OB. The call interval of this OB should be significantly higher than the average cycle time of your program.

S You should set a minimum cycle time that is higher than the average runtime of

OB1. This frees resources for communication on the CPU. This is, for example, a remedy for existing applications when communication already takes place cyclically in OB1.

S If necessary, reduce the time taken for communication processing on the CPU

by changing the parameters set for “cyclic load due to communication” in the properties dialog of the CPU.

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Configuring Communication Connections

This chapter explains the following:

S The general aspects of configuring communication connections S How to configure ISO transport connections, ISO-on-TCP and TCP connections S How to use the connection configuration functions to specify communication

partners that exchange data via UDP

You will find a description of the connection-specific properties dialogs in the following sections:

S ISO transport connections see Section 4.4 S ISO-on-TCP connections see Section 4.5 S TCP connections see Section 4.6 S UDP see Section 4.7

You will find further information in the following sources:

S For the properties of the configurable connection types, refer to Section 1.5 S There are situations in which communication connections are not set up over

the configuration interface of STEP 7 but program-controlled by certain applications; see also Chapter 5.

S For the properties of the configurable connection type E-mail, refer to /5/. S You will find information on the numbers of connections and amounts of data in

Section 3.1.

S For information on configuring connections, refer to the online help of STEP 7

by selecting Help " Contents.

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4.1 Procedure

Initial Situation

The steps described here assume the following:

1. You have created the local S7 station and the required partner stations in your STEP 7 projects (refer to the description in Chapter 2).

2. You have clarified the other station types with which connections must be established. You create substitute objects for these station types in your STEP 7 projects.

Setting up Connections and Using Them in the User Program

The following steps are necessary to operate connections on the SIMATIC S7 PLC with the Ethernet CP:

Configuring

Create new connections. (see Section 4.3.1)

Configure connection properties. (see Sections 4.4 to 4.4)

Download connection configurations and user programs to the S7 station.

Legend:

Programming

Program the SEND/RECEIVE

interface in the user program. (Refer to Section 3.2 and the detailed

FC description in Chapter 6).

necessary steps optional steps

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4.2 Possible Connection Configurations

Communication connections are possible between the communication partners shown in the diagram below.

The communication partners can be in the same project or distributed in the subprojects of a multiproject.

Connections to communication partners outside a project are configured using the STEP 7 object “Partner other project” or using substitute objects such as ”Other stations” or SIMATIC S5.

S7 – 400

Ethernet CP

PG/PC with Ethernet CP

S7 – 300

Subnet 1

Subnet 2

Ethernet CP

SIMATIC S5

S7 – 400

Ethernet CP

Ethernet /IT-CP

WAN* LAN *

only TCP/IP

S7 – 400

Figure 4-1 Possible Connections

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Ethernet CP

Other station with Ethernet attachment

Configuring Communication Connections

Organization in a Multiproject

If interproject subnets are configured, you can also configure connections over such subnets using STEP 7 V5.2. The endpoints of these connections can be located in different projects.

STEP 7 supports you both when creating interproject connections within a multiproject as well as when synchronizing connections that were configured without a multiproject context.

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4.3 Connections

Characteristics of a Connection

A communication connection allows program-controlled communication between two nodes on Industrial Ethernet with the following characteristics:

S The data transfer is bi-directional, in other words, it is possible to transmit and

receive on the connection simultaneously.

S Both stations have the same rights, in other words, each station can trigger the

send and receive procedures in response to events.

S The address of the communication partner is specified in the configuration.

Exceptions to this are: – free UDP connections

Here, the address is specified at the FC interface in the user program.

Configuring Communication Connections

– programmed communication connections (see Chapter 5)

SIMATIC S7 station with Ethernet CP

Figure 4-2 Sending and Receiving via one Communication Connection

Ethernet CP

send

receive

send

receive

Communication connection

Ethernet node

receive

send

Ethernet node

receive

send

Note

The term “connection” is also used here for UDP. Reason: During configuration (just as in TCP) the communication partners are assigned to each other and therefore logically “connected”. In actual fact, with UDP there is no explicit connection establishment between communication partners.

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Amounts of Data

Refer to the manual /1/ supplied with the Ethernet CP for the number of communication connections supported by the Ethernet CP. The number of connections per station can be increased by adding more CPs.

The Ethernet CP can transfer the amounts of data shown in the table below per job on one connection:

Table 4-1

ISO Transport ISO-on-TCP TCP UDP

Sending 8192 bytes 8192 bytes 8192 bytes 2048 bytes

Receiving 8192 bytes 8192 bytes 8192 bytes 2048 bytes

Notice

The transfer of more than 240 bytes of data is supported by newer version CPs. Please note the information in Section 6 and in the manual of the Ethernet CP.

Tasks of the Ethernet CP

When handling the data transfer on a connection, the Ethernet CP has the following tasks:

S When receiving

Receiving data from Ethernet and transferring it to the user data area on the CPU.

S When sending

Taking data from the user data area on the CPU and sending the data via Ethernet.

The connection is established automatically as soon as the partner is obtainable. For a free UDP connection, the following functions are also necessary in addition

to those above: S When receiving

Entry of the sender of the message in the job header.

S When sending

Evaluation of the job header and addressing the partner

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Requirements for Configuring Connections

The Ethernet CP was entered in the hardware configuration and connected to the subnet.

As a bus node, the Ethernet CP has an address.

Notice

All stations not in the STEP 7 project must be configured with substitute objects (for example as “SIMATIC S5” or “Other stations”).

or Use the “unspecified” partner type when you create the connection.

Configuring Communication Connections

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4.3.1 New Connection

Principle

When you create new connections, you start from entered and networked stations. A connection is then configured starting from a station or CPU in the current S7 project and then selecting a destination station.

Due to the networking, the node addresses (MAC or IP addresses) of the two stations are already decided. The local/remote TSAPs (Transport Service Access Point) or ports at both ends of the connection are automatically assigned default values.

If the partner station is a station outside the current project or a non-S7 station, the remote TSAPs (Transport Service Access Point) or ports must be specified in the Properties dialog of the connection.

The endpoint of the connection to a SIMATIC S7 station is always a CPU. A separate connection table is created for each CPU and displays the connection partner and types of connections.

Creating a New Connection

To configure a new connection, the stations and their CPs must be configured and networked in the S7 project. To create a new connection, follow the steps below:

In NetPro, follow the steps below:

1. In NetPro, select the station or the CPU in the station from which you want to establish the connection.

2. Select the menu command Insert " New Connections (also available with the right mouse button!)

Result: The following dialog appears on the screen.

SIMATIC NET NCM S7 for Industrial Ethernet

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Configuring Communication Connections

Figure 4-3 Layout of the “New Connection” Dialog (Example of an ISO Transport Connection)

3. Select the partner station to which you want to establish a connection (if several CPUs exist, please select the required CPU).

4. Select the connection type you want to use (for example ISO transport connection) in the “Type” box

When you confirm your input with Apply, the new connection is created and the ”New Connection” dialog box remains open. This allows you to create further connections without needing to reopen the dialog box. The connection table is updated at the same time.

When you click OK, the connection is entered in the list, the dialog is terminated and the display in the main dialog is updated.

If you click Cancel, the dialog is terminated and the connection is not entered in the list.

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Configuring Communication Connections

Handling Connections in a Multiproject

Interproject connections to a specified partner (for example, a CPU) are created in the same way as connections within a project (identical procedure). The dialog for selecting the connection partner has been extended and allows you not only to select the endpoint (module) but also the project within a multiproject to which the endpoint belongs.

The consistency of interproject connections is retained when you work with the projects of the multiproject:

S Interproject connections within a multiproject are implicitly broken when a

project is taken out of the multiproject for distributed editing and the connection partner is located in the removed project.

S When the removed project is returned to the multiproject, STEP 7 automatically

merges the broken connections consistently.

Connections to Non-S7 Stations using Substitute Objects

If you want to configure connections to devices or stations that are not S7 stations, select a station of the type “SIMATIC S5”, “PC/PG” or “Other Station” as the destination station.

By creating these stations in NetPro and networking them, you have already specified the node addresses (MAC or IP addresses) of the two stations. You must specify the TSAP (Transport Service Access Point) for the destination station.

Notice

Connections to non-S7 stations (for example SIMATIC S5) are generated as incompletely specified connections; in other words, the remote TSAP or port is empty. These connections must be specified in the Properties dialog.

4.3.2 Connections to Partners in Other Projects

There are various ways of creating connections to partners configured in other STEP 7 projects or with other tools outside the current STEP 7 project:

S Connections using substitute objects such as “SIMATIC S5”, “PC/PG” ,

“SIMATIC PC Station” or “Other Station”.

This method is described in the section above.

S Unspecified connections S STEP 7 object ”Partner in other project” (multiproject)

With this method, a connection is reserved in both subprojects that can be synchronized later by the system when the partner project is included in the multiproject.

SIMATIC NET NCM S7 for Industrial Ethernet

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In both projects, the same connection name must be configured in the properties of the connection. The connection name is used as a textual reference when the projects are merged. Based on the connection name it is possible to assign the connection partner and synchronize the connection properties.

Before the projects are merged, such connections are ”unspecified connections” in terms of addressing; in other words, the partner addresses remain empty.

Unspecified Connections

Connections to an as yet unknown device (for example a diagnostic unit) are configured as “unspecified” connections. They can be specified later in the Properties dialog.

You can create an unspecified connection simply by selecting station “unspecified” for the connection partner when you create the connection. The unspecified connection can be used in three ways (explained below based on the example of an ISO-on-TCP connection (ISO transport and TCP connections are analogous):

Configuring Communication Connections

V 5.2.1

S Declare readiness for communication – passive connection establishment

The connection establishment is then set to passive (see settings in the General tab).

The address setting for the ISO-on-TCP connection is then as follows: The remote IP address and the remote TSAP are empty, in other words, they are not relevant for the CP. When the connection is established, any partner is accepted (partner = connection name that addresses the CP with the correct IP address and TSAP).

It is also possible to use a partial specification; in other words, communication is permitted with any partner that matches the specified TSAP.

S Connection to a specific station in any project

The address setting for the ISO-on-TCP connection is then as follows: You can specify the remote IP address and the port of any destination station. The destination station can be in the current STEP 7 project or in another project.

Use this method if you have not created a substitute object for the partner station, for example SIMATIC S5, in the current project.

S IP Address Assignment over DHCP

If you select the option to obtain the IP address from a DHCP server, it is initially not possible to create a fully specified connection in the STEP 7 project because the local IP address is not known. You must therefore select ”unspecified” with passive connection establishment as the connection type.

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The following table lists the possible options.

Table 4-2

Meaning for Connection

Establishment

by any partner empty empty passive by any partner via specific TSAP empty specified passive to or by a specific partner specified specified active / passive

IP Address /

MAC Address

TSAP / Port Possible Connection

Establishment

The free UDP connection is another variant. With this type of connection, the address of the connection partner is left open during configuration. The communication nodes are identified by address information in the communication job in the user program.

For further information, refer to the sections dealing with specific connections.

Notice

The number of connections possible per Ethernet CP can be found in the manual /1/supplied with the CP. If several CPs are installed in one station, the next CP is automatically selected if the limit is exceeded. The connections can be routed in the Properties dialog of the connection.

SIMATIC NET NCM S7 for Industrial Ethernet

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Configuring Communication Connections

4.3.3 Further Functions

Toolbar

In the toolbar of the connection configuration dialog the following functions are available:

Save To save the configured connection, select the Save function or click the save

button.

Print You can print the entire connection table or individual sections of it by selecting

the Print function or clicking the print button. The following print options are available:

S Overview of all connections (complete connection table) S Overview of the selected connections (selected area) S Detailed printout of all connections (details of all connections) S Detailed printout of the selected connections (details of the selected area)

Change Connection Partners

Insert Connection You create a new entry in the connection table.

Download You download the connection table to the PLC. For more detailed information

Help If you require help or more information, select the Help function or click the

You assign a new partner station to the selected connection. Important!

Remember that this also changes the partner ID on connections of the SEND/RECEIVE interface. You may need to adapt your user program.

call up the integrated help function.

help button. The help button provides you with context-related help. Using the help function you call a help dialog familiar from other Windows applications.

Print Function in the “Overview” Tab

An additional function for printing the configured connections and configuration status is available in the “Overview” tab of the properties dialog of the connection.

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4.3.4 Connections Without Assignment

Overview

This section explains the actions that can lead to a configured connection losing its assignment to the CP or being deleted.

Caution

Remember that in contrast to the S7 connections, the connections of the SEND/RECEIVE interface are assigned a CP-dependent ID. The actions below may require the ID to be modified so that the interface information in the user program must also be adapted.

Notice

If you replace one CP with another, this must provide at least the same services and have at least the same version. This is the only way to ensure that the connections configured over the CP remain consistent and can be used.

Table 4-3 Actions That Can Cause Changes to Configured Connections

Action Consequences for the

How to Establish the Connection

Connections

The CP (module) is moved to a different location in the hardware configuration (drag and drop)

The CP (module) is deleted in the hardware configuration.

You receive the message “CP has n connections; the assignment will be lost in the connection table”.

Deleting the SIMATIC S7 station.

The connections are retained. The connection IDs are

automatically updated.

The connections remain without assignment to a CP in the connection table. In the “Overview” tab of the Properties dialog, the connections are identified with “!”.

All the connections to this station are deleted within the project.

Note: The does not apply to

connections to a partner that uses a router.

1. Adapt the module start address LADDR in the user program.

2. Download the connection configuration to the CP again.

Once you have placed a CP in the hardware configuration and networked it:

1. Assign the CP in the connection properties dialog in the “Addresses” tab.

Reassign the connection using the menu option Edit

Partner....

2. Adapt the connection ID in the user program.

3. Download the connection configuration to the CP again.

Reconfigure the station and connections.

Again

Connection

100

SIMATIC NET NCM S7 for Industrial Ethernet

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Siemens NCM S7 User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual

Manual

This Manual on SIMATIC NET NCM S7 for Industrial Ethernet

Contents

Communication via Ethernet CPs in S7 Stations

1.1 Industrial Ethernet

1.2 SIMATIC S7 Communication with S7 Ethernet CPs

1.3 PG/OP Communication via Industrial Ethernet

1.3.1 PG Communication with STEP 7 over Industrial Ethernet

1.3.2 OP Operation: Connecting Operator Interface Devices via Industrial Ethernet

1.4 S7 Communication on Industrial Ethernet

1.6 FETCH/WRITE Services (Server)

1.7 Networking Stations with STEP 7

1.7.1 Network/Project Variant: One Subnet – One Project

1.7.2 Network/Project Variant: SIMATIC S5 and Non-SIMATIC Devices on the Subnet

1.7.3 Network/Project Variant: Two or More Subnets – One Project

1.7.4 Network/Project Variant: One Subnet – More Than One (Sub)Project

1.7.5 Network/Project Variant: Several Subnets in Several (Sub) Projects

1.7.6 Network/Project Variant: Connections between Subnets (TCP/IP)

Installing and Starting the Ethernet CP with STEP 7

2.1 General Information About the NCM S7 for Industrial Ethernet Option

2.2 Procedure

2.2.1 Creating an Industrial Ethernet Subnet

2.2.2 Entering an Ethernet CP in the Hardware Configuration

2.2.3 Displaying the Network Attachments of a Station

2.2.4 Setting Further CP Properties

2.2.5 “Substitute Objects” in the STEP 7 Project

2.2.6 Configuring Communication Services

2.3 Assigning Addresses for the First Time (Applies to Latest CPs)

2.3.1 Addressing by Selecting the Target System in the SIMATIC Manager

2.3.2 Addressing using the Properties Dialog in HW Config or NetPro

2.4 Downloading the Configuration Data to the Target System

SEND/RECEIVE Interface in the User Program

3.1 How the SEND/RECEIVE Interface Works on the CPU

3.2 Programming the SEND/RECEIVE Interface

3.3 Data Exchange S7 CPU <–> Ethernet CP

3.4 Additional Information

3.4.1 Programming Data Transfer on TCP Connections

3.4.2 Recommendations for Use with a High Communications Load

Configuring Communication Connections

4.1 Procedure

4.2 Possible Connection Configurations

4.3 Connections

4.3.1 New Connection

4.3.2 Connections to Partners in Other Projects

4.3.3 Further Functions

4.3.4 Connections Without Assignment