OPC UA

YAML key: opcua_server

Expose an OPC UA server (opc.tcp://...) and map nodes to SPX attributes.

Minimal configuration

Example model (spx-examples): library/domains/iot/generic/production_workcell__opcua.yaml

communication:
  - opcua_server:
      endpoint: opc.tcp://0.0.0.0:4841/spx/workcell
      namespace_uri: urn:spx:examples:opcua:workcell
      security:
        policy: NoSecurity
        user_tokens:
          - type: anonymous
      sections:
        - name: station
          browse_path: ["Workcell"]
          bindings:
            - name: MachineState
              direction: outbound
              attributes: "#attr(machine_state)"
              node:
                browse_path: ["State"]
                data_type: String
            - name: StationMode
              direction: bidirectional
              read_attribute: "#attr(station_mode)"
              write_attribute: "#attr(station_mode)"
              node:
                browse_path: ["Mode"]
                data_type: String

Notes

• Dependency: requires asyncua in the SPX Server environment.

• Bindings support either attributes (single attribute) or explicit read_attribute / write_attribute for bidirectional nodes.