Overview

An OPC server represents a standardised interface for the management of process data. The process data available in the TwinCAT system must therefore be known to the OPC server, or must be made known to it at the time of configuration. To represent this "hierarchical process space" clearly, the "Devices" are subdivided into subsidiary items. The OPC client can browse through this representation and use it for the server's actual configuration. The TwinCAT OPC server supports the optional browser OPC interface.

This hierarchical display is not to be confused with the configuration of the OPC server that exists at run-time. The run-time configuration of the OPC server, i.e. the creation of groups, specification of the refresh time, the insertion of tags etc. is performed dynamically by the OPC client.