This specification is defined and updated by the organization OPC Foundation (see: https://www.opcfoundation.org).
The specification has the client-server architecture.
For this communication in the PROMOTIC system can be used: PmOpcUaClient - Driver for communication with OPC UA server.
The main disadvantage of this specification is its dependence on the Microsoft standards and very difficult configuration in situations if the OPC server is not located on the same computer as the running PROMOTIC application (then it is necessary to configure DCOM - see Configuration of the DCOM interface for OPC-DA server).
For this OPC specification there is the PmaOpcDaClient object in the PROMOTIC system.
These additional functions are not supported in the PROMOTIC system.