12 Apendix Open Process Control

Automation and Drives

Open Process Control (WinLC (WinLC RTX V4.x V4.x as examp example) le) OPC client e.g. OPC Scout OPC interface Search Search addr ess space

Read access

OPC interface

OPC server WinAC Configuration tool

Group

Items from

WinAC WinAC Symbol File Configurator

Add res s space

address space

Symbol file

It em

Created by client

It em

Configuration tool

It em

Simatic manager

WinLC Var ia iab le le

Var ia iab le le

Var ia iab l e

Drivers PROFIBUS DP

PROFIBUS PROFIBUS DP field devices SITRAIN IK-PBSYS / Open Process Control

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Co n t en t s

03/2007 © Siemens AG 2007 - Subject to change without prior notice

Pag e

Overview Overview of OPC server server WinAC ............ ................. .......... ........... ........... .......... ........... ............ ............ ........... .......... ........... ........... .......... ........... ............ ........... .......... .....

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Configuring Configuring hardware hardware in STEP 7 (example) (example) ........... ................ .......... .......... .......... ........... ............ ........... .......... ........... ............ ........... ........... ........... .......... .....

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Creating Creating a symbol symbol table in the the S7 project project ........... ................ .......... .......... .......... ........... ............ ........... .......... .......... ........... ........... ........... ............ ............ .......... ....

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Creating Creating a PC station station in the STEP 7 project project ........... ................ .......... .......... .......... ........... ........... .......... ........... ............ ............ ............ ........... .......... ......... ......

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Renaming Renaming the PC station station

.......... ................ ............ ............ ........... .......... ........... ........... .......... ........... ........... .......... ........... ........... .......... ........... ............ ........... .......... .......... .......

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Renami Renaming ng the compon component ent config configura urator tor (CoCo) (CoCo) ...... ......... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...

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PC statio station n hardwa hardware re config configura uratio tion n (OPC (OPC server server)) ...... ......... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...

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PC station station hardware hardware configurati configuration on (WinLC) (WinLC) ........... ................ .......... ........... ............ ........... .......... .......... .......... ........... ........... .......... ........... ............ ........... ....... Matching Matching with the component component configurat configurator or ........... ................ .......... ........... ........... .......... .......... .......... ........... ........... .......... .......... ........... ............ ........... ....... ..

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Creating Creating an S7 connection connection in NetPro NetPro (1) ........... ................ .......... ........... ........... .......... .......... ........... ........... .......... ........... ........... ........... ............ ........... .......... .......

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Creating Creating an S7 connection connection in NetPro NetPro (2) ........... ................ .......... ........... ........... .......... .......... ........... ........... .......... ........... ........... ........... ............ ........... .......... .......

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Downloading Downloading the PC configurati configuration on

........... ................ .......... .......... .......... ........... ............ ............ ............ ............ ........... ........... ........... .......... .......... .......... .......... ........ ...

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Setting Setting the access access point point for S7ONLI S7ONLINE NE ........... ................. ........... ........... ........... .......... .......... .......... .......... ........... ............ ........... .......... ........... ............ .......... ...... .. Loading Loading the configurat configuration ion (WinLC RTX system) system) ........... ................. ........... ........... ........... .......... .......... .......... ........... ............ ............ ............ ........... ........ ...

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Downloading Downloading the PC PC station station ........... ................ .......... .......... .......... ........... ............ ............ ............ ............ ........... ........... ........... .......... .......... .......... .......... .......... ........... ........ ..

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Configurati Configuration on console console (OPC settings) settings) .......... ................ ............ ............ ........... .......... .......... .......... .......... ........... ............ ............ ............ ........... .......... ......... ......... .....

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Properties Properties of the OPC server ........... ................ .......... .......... ........... ........... ........... ........... ........... ........... ........... ........... ........... ........... ........... ........... ........... .......... .......... ........ ..

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Configuring Configuring symbols symbols ........... ................ .......... .......... ........... ........... .......... .......... ........... ............ ............ ........... .......... ........... ............ ........... ........... ........... .......... .......... .......... ......... ....

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Loading a station ....................................................................... .............................................................................................................. ......................................................... ..................

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Editing Editing symbol symbol files ........... ................ .......... .......... ........... ........... .......... .......... ........... ............ ............ ........... .......... ........... ............ ........... ........... ........... .......... .......... ........... ............ ......

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Configuring Configuring a symbol symbol file

........... ................ .......... .......... ........... ........... .......... .......... ........... ............ ............ ........... .......... ........... ............ ........... ........... .......... ......... .......... ....... ..

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Accepting symbols for OPC ........................................... ....................................................................................... ................................................................... .........................

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OPC Navigator Navigator

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........... ................ .......... .......... ........... ............ ........... .......... .......... ........... ........... .......... ........... ............ ............ ........... .......... ........... ............ ........... .......... ........... ........... .....

OPC Scout: Scout: Access Access to addressed addressed items Summary Summary

........... ................ .......... ........... ........... .......... ........... ........... .......... ........... ........... .......... ........... ............ ............ ......... ...

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........... ................ .......... .......... ........... ........... ........... ........... ........... ............ ........... .......... .......... ........... ............ ........... .......... ........... ............ ............ ........... .......... .......... .......... ......... ....

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SITRAIN trainin training g for Automation and Industrial Solutions

Page 1

IK-PBSYS Open Process Process Control Control


Overview of OPC server WinAC

OPC client e.g. OPC Scout OPC interface Read access

Search Search addr ess space OPC interface

Configuration tool WinAC WinAC Symbol Symbol File Configurator

OPC server WinAC

Group

Items from Add ress space

address space

Symbol file

It em

Created by client

It em

Configuration tool

It em

Simatic manager

WinLC Var ia iab le le

Var ia iab le le

Var ia iab le le

Drivers PROFIBUS DP

PROFIBUS PROFIBUS DP field devices

SITRAIN IK-PBSYS / Open Process Control

Su m m a r y

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Co n f i g u r i n g en v i r o n men t : The OPC server configuration comprises the address space configuration and the logic controller (WinLC) configuration. The symbol file for the address space is used to define which absolute data areas in the WinLC will be used and which names will will be used by the OPC client to access data in the WinLC. This symbol file is created with the Symbol File Configurator. The hardware configuration and the control program for the WinLC are created with the Simatic Simatic Manager. Manager. Runtime environment: In runtime, an OPC client can search the address space of the OPC server and set up groups to which it can add items from the address space. These items can then be used to perform read and write operations.

SITRAIN trainin training g for Automation and Industrial Solutions

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IK-PBSYS Open Process Process Control Control


Configuring hardware in STEP 7 (example)


Procedure

1.The hardware must be configured with distributed I/Os in the STEP 7 configuration. This is loaded to the Logic Controller WinLC RTX. 2.For WinAC Basic V4.0, a PC station must be configured. The logic controller must be inserted in this station in the hardware configuration. WinLC V4.0 is stored in the hardware catalog under heading SIMATIC PC Station  Controller. 3.The PROFIBUS DP master is created by the logic controller and the CP. The DP master must be configured with the DP slaves.

SITRAIN training for Automation and Industrial Solutions

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IK-PBSYS Open Process Control


Creating a symbol table in the S7 project


Symbols

When symbolic addressing is used in the STEP 7 program, the address space of the OPC server can be generated from the symbolic information (see "Configuring a symbol file").


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Creating a PC station in the STEP 7 project


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Notes


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Renaming the PC station

PC station after renaming "My OPC station"

Standard name for a new PC station


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Notes


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Renaming the component configurator (CoCo)

"CoCo" is always displayed here (double click to open)

Name must match the name of the PC station

Button for changing the station name


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Notes


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PC station hardware configuration (OPC server)

The OPC server position can be freely selected.

Select an OPC server and drag it to the "rack". SITRAIN IK-PBSYS / Open Process Control

Note

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If you do not know which version of OPC server is installed, it is always better to select the latest version. When you are loading the configuration, wait to see whether an error message is displayed which will indicate which version of OPC server is installed. It might then be necessary to select another OPC server version.


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PC station hardware configuration (WinLC)

Select the correct version of WinLC RTX


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Notes


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Matching with the component configurator

The entries in the HW Config must have the same indices as those in the CoCo

Status messages

Adding components


Note

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The entries in the hardware configuration must have the same indices as those in the component configurator.


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Creating an S7 connection in NetPro (1)

OPC server

New connections are configured on the OPC server


Notes

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New connections are configured on the OPC server To do this, select the OPC server and use the menu to insert the appropriate S7 connection.


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Creating an S7 connection in NetPro (2) Connection name

All accessible nodes

No choice of a different interface. This is predefined for WinLC. S7 connection


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Notes


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Downloading the PC configuration The component configurator "CoCo" cannot be accessed online:  Is access point S7ONLINE set to "PC Internal"?  Is the name of the PC station correctly entered in the "CoCo"?  WinLC RTX already started?


Note

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If the component configurator cannot be accessed online, the following settings should be checked: - Is access point S7online set to "PC internal"? - Is the name of the PC station correctly entered in the component configurator? - The WinLC RTX must be started


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Setting the access point for S7ONLINE Load "CoCo": Set interface PC Internal (local)

Set access points PG/PC interface as alternative

"CoCo" correctly loaded (yellow arrow)


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Notes


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Loading the configuration (WinLC RTX system)

PG/PC interface  PC internal (local)


Procedure

1.To load the configuration, WinLC must be started with menu commandStart  Simatic  PC Based Control  Windows Logic Controller . 2.The configuration can now be loaded from the SIMATIC Manager to the WinLC RTX.

Note

Before the configuration can be downloaded, the access point of theS7ONLINE application must be switched over with menu commandsCPU Set PG/PC interface on the operator panel. In this dialog, you must switch the access point from "S7ONLINE" to "PC internal (local)". If you wish to access external equipment via the MPI, S7ONLINE must be switched back to the MPI interface (e.g. CP5611 (MPI)).


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Downloading the PC station Component correctly configured

Status irrelevant for WinLC

Component has been started and is ready to run

S7 connection is configured. No data can be exchanged with the WinLC without a connection. SITRAIN IK-PBSYS / Open Process Control

Note

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No yellow or red "LEDs" must be alight on the WinLC status display.


You can check S7 variables using variable tables.


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Configuration console (OPC settings)


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Notes


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Properties of the OPC server Properties of the OPC server

OPC server

Configuring a symbol file


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The Symbol File Configurator An OPC client normally accesses process variables using Item IDs that contain address information. It is, however, also possible to access the variables using symbolic names that can be structured hierarchically. Instead of working with names which depend on protocol or device, it is possible to set up a symbolic name space which corresponds, for example, to a plant structure. Symbolic names can be used with any type of protocol. In addition to creating your own name space, you can also transfer symbol names from SIMATIC STEP 7. The Symbol File Configurator creates files for the SIMATIC NET OPC server which contain symbol name definitions. You will need the Symbol File Configurator to set up a symbolic name space and to transfer symbolic names from SIMATIC STEP 7. OPC ItemID

The OPC ItemID is the process variable identifier used by the OPC Server. An ItemID is transferred by the OPC client to the OPC Server to identify a process variable and is unique for the OPC Server. It is either a symbolic name or a runtime name.

Symbolic name

A symbolic name is an OPC Item ID that has been generated by the Symbol File Configurator. In a hierarchically structured name space, a symbolic name is made up of the names of the hierarchical levels and the actual symbol. Example: Plant_Packing.Conveyor1.Limit_Switch

Runtime name

A runtime name is an OPC ItemID which contains protocol and address information for assignment purposes and which is accepted d irectly by the OPC Server without using a symbol file. Using the Symbol File Configurator, a symbolic name is assigned to a runtime name.


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Configuring symbols


Using symbols

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You can decide whether to transfer symbols from the symbol tables configured in STEP 7 to the system data for the OPC server. This must be done if user applications (OPC clients) are to access symbolic variables over the OPC server. The symbol tables used are those of the CPUs for which S7 connections are configured for the OPC server. This process includes only those symbols which refer to data blocks (DB). - None: No symbols from STEP 7 will be transferred to the system data for the OPC server. The access rights configured under access protection for the OPC Items apply. - Al l: All relevant symbols from STEP 7 are transferred to the system data for the OPC server. The access rights for all symbolic access operations to the assigned variables are set to Read/ Write (RW) by this selection. They have priority over the access rights for the OPC_Items assigned in the access protection area. - Selected: Selected symbols from STEP 7 are transferred to the system data for the OPC server. By selecting the "Edit" button, you can open the "Use symbols" dialog in which you can select and configure symbols.


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Loading a station


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Notes


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Editing symbol files

Edit symbol files Manage symbol files


Using symbols

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You can decide whether to transfer symbols from the symbol tables configured in STEP 7 to the system data for the OPC server. This is necessary if user applications (OPC clients) are to access symbolic variables over the OPC server.


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Configuring a symbol file

Save a symbol file (<>.sti)

Data blocks are automatically extracted. For this reason, only the DB need be specified in the symbol table.


OPC server

As soon as the configuration has been loaded to the WinLC, the data in the PLC can be accessed via the OPC server. However, it is only possible to use absolute addresses (M1.0, I2.3). Neither is it possible to browse in the server's address space. In other words, anyone who uses an OPC client application must know the absolute addresses.

Symbol file

To overcome this shortcoming, a symbol file can be generated from the symbolic information of the STEP 7 program. This file provides the OPC server with a symbolic address space.

Address space

The STEP7 projects can be browsed to locate the control program written for WinAC in the SIMATIC Program(s). This program contains the symbolic information required to set up the OPC server's address space. To be able to display the STEP7 project in this dialog, it must already have been opened at least once on the computer with the STEP7 Manager. 1.To generate the symbol file, select menu commands Start  Simatic  PC Based Control  Computing TagFile Configurator (Symbol File Configurator). 2.A new symbol file is created with menu commands File  New . 3.To select a STEP 7 program containing the symbolic information, activate menu commands Insert  New symbol .


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Accepting symbols for OPC


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Notes


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OPC Navigator

WinAC is not started.

Accept selected "Items"


OPC Scout

The SIMATIC NET's OPC Scout application can be used to check the WinAC OPC server. This server can be checked provided that the Logic Controller has started correctly. 1.You can open the OPC Scout in the start menu by selecting menu commands Simatic  SIMATIC NET  OPC Server  OPC Scout 2.When you double click on "OPCServer.SIMATIC.NET", a window opens in which you can create a new group. In this example, it will be named "Test". The group is set up when you click on OK. 3.To add new ITEMS to this group, you need only double click on the group "Test".


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OPC Scout: Access to addressed items


Check

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If the items have been successfully added to the group, the process values for the relevant items are displayed in the "Values" column. The "Quality" column indicates whether the OPC server is supplying accurate values. Quality = good means that the values are o.k. Quality = bad means that there is a server problem.


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Summary

OPC client

e.g. OPC Scout

OPC interface Read access

Search addr ess space OPC interface

Configuration tool WinAC Symbol File Configurator

OPC server WinAC

Group

Items from Add ress space

address space

Symbol file

Item

Created by client

Item

Configuration tool

Item

Simatic manager

WinLC Var iab le

Var iab le

Var iab le

Drivers PROFIBUS DP

PROFIBUS DP field devices


Summary

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Configuring environment: The OPC server configuration comprises the address space configuration and the logic controller (WinLC) configuration. The symbol file for the address space is used to define which absolute data areas in the WinLC will be used and which names will be used by the OPC client to access data in the WinLC. This symbol file is created with the Symbol File Configurator. The hardware configuration and the control program for the WinLC are created with the Simatic Manager. Runtime environment: In runtime, an OPC client can search the address space of the OPC server and set up groups to which it can add items from the address space. These items can then be used to perform read and write operations.


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12 Apendix Open Process Control

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