Network via client protocol

Visualisation systems sometimes offer their own protocol to bridge the network. An OPC client from the visualisation system supplier is also installed on the TwinCAT controller PC for this purpose.

The data flow proceeds as follows:

Performance advantage

The primary advantage of this configuration is that considerably less loading is placed on the network, since only the process values that have altered are exchanged there: the OPC server checks the whole process cyclically, but only passes the changes in the process on to the OPC client.