Adding a control point to invoke an OPC UA method

The driver provides a means of invoking OPC UA method objects defined in a OPC UA server.  My Method icon () identifies discovered OPC UA methods.

1. To open the Opc Ua Client Point Manager, expand Config > Drivers > OpcUaNetwork > OpcUaDevice and double-click the Points folder.
2. To run a discovery job, lick Discover.
3. Select a MyMethod and click Add.
   The driver adds the method in the Discovered pane to the database. The added control point now has a callMethod action.
4. Right-click on the method and click Actions > callMethod.
   If the method has defined input arguments, a Call Method window opens with the arguments.

   
   
   

   A descriptor displays each argument. You may need to scroll the descriptor to see the complete text.

5. Enter the desired argument values and click OK.
   
   
   The OpcUaMethod control point is a subclass of BStringPoint. The out property is a StatusString type. The data type of the method return value may not be a string. In addition to setting the Out property by converting the method results to a string, the driver adds a Result property of the appropriate BStatusValue type.
   This invokes the method in the OPC UA server with the provided arguments.