T5BusExopcua_s: writing a string variable from an OPC UA client takes over the value the first time but not on subsequent writes

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• FAQ: How can I browse an OPC UA Server using the zenon OPC UA Client Driver?

  Go to Drivers > New Driver Create a Driver of Type "OPC UA Client Driver" Open the Driver Configuration Go to "Connections" Create a new Connection Enter your Discovery URL Enter your Server URL manually or click the 3 dots to browse the Discovery ...

• The variable value is updated in the OPC UA server after a client has written the value, although the value in the zenon runtime is set to alternate value (ALT_VAL status)

  Summary When an OPC UA client writes a value for a variable that is set to ALT_VAL in the runtime, the value is written and updated in the OPC UA server although the value is not updated in the zenon runtime due to the ALT_VAL status. DescriptionWhen ...

• The OPC UA server does not consider the timeoutHint in Publish Requests from an OPC UA client

  Summary The zenon OPC UA server in the process gateway and the zenon logic OPC UA server, do not consider the timeoutHint in Publish Requests from OPC UA clients. OPC UA clients that expect an OPC UA server to consider the timeoutHint may reject a ...

• The AccessOPCUA OPC UA server in the process gateway allows write requests of OPC UA clients when the variable status is INVALID and updates the internal shadow value.

  Summary When a variable configured in the OPC UA server in the process gateway has status INVALID an OPC UA client can still write the value and the value will get updated in the OPC UA server itself. The value is not sent to the runtime and the PLC. ...

• A variable of the OPCUA32 OPC UA client driver set to alternate value in the runtime may still get updated with a value from the OPC UA server

  Summary When a variable of the OPCUA32 OPC UA client driver is set to "alternate value", an update of the value in the OPC UA server will result in the OPCUA32 client driver receiving the value and forwarding this value to the runtime, overwriting ...