Opc Ua Server Instructions For The Implementation Of Methods; Opc_Ua_Servermethodpre - Siemens SIMATIC ET 200AL System Manual

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OPC UA communication

9.3 Using the S7-1500 as an OPC UA server

OPC UA server instructions for the implementation of methods

Introduction

This section describes the instruction "OPC_UA_ServerMethodPre".

Because the instructions "OPC_UA_ServerMethodPre" and "OPC_UA_ServerMethodPost"

always have to be called up in pairs in the user program, please also take into account the

section on the instruction "OPC_UA_ServerMethodPost".

Function of the instruction

The instruction "OPC_UA_ServerMethodPre" queries the operating system to determine

whether or not the server method was called.

If the server method was called by the client, the instruction "OPC_UA_ServerMethodPre"

provides the input parameters for the server method.

Declaration of tags

Declare an instance of the instruction "OPC_UA_ServerMethodPre" and the tags with which

you supply the instruction parameters, see also Example program for providing a method for

OPC UA clients (Page 190).

Function Manual, 12/2017, A5E03735815-AF

Communication

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