This example shows the principles of how to use the OPCUA Library to connect to an OPC UA server for data acquisition.

This example requires an OPC UA example server running on localhost. Read about how to start the example server here.

Components writeReal, writeInteger, and writeBoolean are blocks for writing data of their respective types to items on an OPC UA server. The input to a block is the signal that is to be sampled and written to the server, in this case a cosine wave, a real-to-integer converted sine wave, and a Boolean pulse signal.

Components readReal, readInteger, and readBoolean are blocks for reading data of their respective types from the server. The data is stored on nodes on the server, which is accessed by specifying the nodeID, nodeIDType, and nodeNamespace.

Plot of the signals of type Real that are written to and read from the OPC UA server.

Plot of the signals of type Integer that are written to and read from the OPC UA server.

Plot of the signals of type Boolean that are written to and read from the OPC UA server.