Maximizing Interoperability: our approach in MODUL4R with IEC61499

The ultimate goal of our MODUL4R project is to advance manufacturing through robust and autonomous modular production lines and supply chains.

One of the key objectives of nxtControl, a leading expert within our MODUL4R consortium, is to maximize interoperability due to integration of legacy PLC systems. Using IEC61499 CPS-izer technology or new embedded IEC61499 controllers from multiple vendors, will enable the seamless implementation of a modular, distributed and hardware-independent IEC61499 control application system.

CPS-izers are building the bridge to existing legacy controllers through integration into a distributed IEC61499 control system. Furthermore, a near real time OT/IT service-communication interface to the IT level will be designed, interacting with the computation middleware layer. The figure below illustrates the IEC61499 software architecture for the Edge-Gateway, presenting the three functionalities included in a Composite Automation Block (CAT):

• North-Bound-Connector (for MQTT, OPC UA) to the IT-Layer, the Cloud-Layer.

• IEC61499 Control-Logic extensions for the Legacy PLC.

• South-Bound-Connector (MQTT, OPC UA, Websocket) to the OT-layer, the legacy PLC.

What are key-advantages gained?

• Protocol independent adapter interface for each connector.

• Support of multiple connectors (OPCUA, MQTT etc.).

This software gateway and CPS-izer follows IEC61499 design guidelines, made by Schneider Electric, and realized with the EcoStruxure Automation Expert. This software gateway and CPS-izer will be integrated and tested in selected demonstrators within MODUL4R.