7 Example — OPC Application for Industrial Ethernet

Activity

In NetPro, you will find the network assignment of the SIMATIC 400 station and the PC station displayed graphically.

7.3.2Using Symbol Files

Introduction

Symbol tables are created during project engineering with STEP 7 on a central engineering station in the form of STI files.

You can continue to use the symbol definitions made in the STEP 7 project engineering when working with OPC. This is necessary 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 planned for the OPC server. Symbols that relate, for example, to data blocks (DBs), bit memory, inputs, and outputs are taken into account.

Make the settings described in “Specifying the Use of Symbol Files” for the OPC server on the central engineering station.

Commissioning PC Stations - Manual and Quick Start

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Release 5/2005

C79000-G8976-C156-07

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Siemens C79000-G8976-C156-07 quick start Using Symbol Files, Introduction