Tag Archives: uns

Bringing PLC values to OPC UA, MQTT, GraphQL

With just some lines of configuration you can bring PLC values to OPC UA, MQTT and GraphQL. And to a variety of databases for tag logging…

💡 In that example with ModBus, but thanks to #plc4x this should work in the same way also for the other protocols supported by PLC4X.

📺 See the video, ModBus values are brought to OPC UA and MQTT.

💣 In MQTT the topic name is enriched with a UNS ISA95 topic path.

⚡ On MQTT SparkplugB encoded messages could be used.

😎 100% GUI free and Open Source.

👉 automation-gateway.com

    - Port: 4000
      LogLevel: INFO
      GraphiQL: true

    - Port: 4841
      Enabled: true
      LogLevel: INFO      
        - Topic: plc/demo/node/holding-register:1:INT
        - Topic: plc/demo/node/holding-register:2:INT
        - Topic: plc/demo/node/holding-register:3:INT
    - Id: "demo"
      Enabled: true
      Url: "modbus://localhost:502"
        Time: 100
        OldNew: true
      WriteTimeout: 100
      ReadTimeout: 100
      LogLevel: INFO    

    - Id: mqtt1
      Enabled: true
      Port: 1883
      Topic: modbus
      Format: Raw
        - Topic: plc/demo/node/holding-register:1:INT
          Target: enterprise/area1/line1/cell1/speed
        - Topic: plc/demo/node/holding-register:2:INT
          Target: enterprise/area1/line1/cell1/power
        - Topic: plc/demo/node/holding-register:3:INT
          Target: enterprise/area1/line1/cell1/torque

UNS with WinCC Open Architecture?

Did you know that WinCC Open Architecture is “UNS READY”? 👍

And it even does not matter how your underlying tags are structured 😮

👉 You can create your own hierarchical view on tags which you want to publish to MQTT in a Unified Namespace!

👉 You can define a fully ISA 95 compliant view on top of your machine data!

Happy UNS Publishing with WinCC Open Architecture!

See the MQTT publisher at the WinCC Open Architecture Documentation

Use the Unified Namespace (UNS) as a graph?

🤔 I thought about if it could make sense to connect to a MQTT broker and write the topic-path in a structured and connected way to a graph database. It could reflect a companies UNS with ISA structure in a graph with query possibilities.

🤝 The UNS could be enriched by adding additional meta information to the database and be linked to the MQTT nodes. Graph queries could be used to combine the enriched data with the current values of the machines…

👉 I reactivated the Neo4J Logger in the Automation-Gateway.com, and enabled MQTT for it. It creates the nodes in a neo4j graph database based on the incoming MQTT messages.

Also interesting to explore the graph of the test.mosquitto.org hashtag#MQTT broker…

saw some go-eChargers, some solax inverters, some json scada demos (never heard about it before), and also a “Atomkraftwerk1234567890” 😀