This example demonstrates that using the OPCUA Library, it is possible to connect to multiple servers from one model.

This example requiers two OPC UA example servers running on localhost. Read about how to start the example servers here.

The readReal component reads data from a real-valued node "51031" on "opc.tcp://localhost:16664". The data is then passed through a Butterworth lowpass filter with a cutoff frequency of 0.2 Hz. Finally, the component writeReal writes the filtered data to node "51031" on "opc.tcp://localhost:16665".

There are several possible applications of being able to connect to more than one server from one model, such as processing data read from one server and writing the modified data to another server.

 If you have the possibility to set up a remote OPC UA server, what you need to do get this example to use the remote is to:

1. Change hostName accordingly in component  opcServer or opcServer1, for example opcServer.hostName = "opc.tcp://raspberrypi:16664" and opcServer1.hostName = "opc.tcp://localhost:16664".
2. Change the corresponding nodeID, nodeIDType, and nodeNamespace in the connected block so that it connects to a real-valued node on the second server.

Plot of the values on node 51031 read from component opcServer.

Plot of the filtered signal and the sampled data written to node 51031 on opcServer1.