Beckhoff Automation

OPC UA Pub/Sub integrated directly into TwinCAT 3

10. Dezember 2021, 20:47 Uhr | Andreas Knoll
OPC UA Pub/Sub ist jetzt Bestandteil der Runtime von TwinCAT 3.
OPC UA Pub/Sub is now part of the TwinCAT 3 runtime.
© Beckhoff Automation

Beckhoff Automation has integrated OPC UA Pub/Sub directly into the runtime of their TwinCAT 3 automation software. TwinCAT 3 can thus be used to implement M2M and D2C scenarios (machine-to-machine and device-to-cloud) based on the OPC UA Pub/Sub specification.

With a new extension of the OPC UA specification, which Beckhoff played a prominent role in helping develop, the publisher/subscriber principle is being introduced into the established and standardized OPC UA communication protocol. Two different transport paths can be defined for data transmission: UDP and MQTT.

UDP enables efficient and real-time-capable data exchange in a local network between machines or machine components, whereas transport via an MQTT message broker primarily, but not exclusively, supports cloud scenarios. As an early adopter, Beckhoff implemented an initial prototype implementation of the UDP transport path back in 2016. Now, the implementation of MQTT adds a second transport path. With the new TwinCAT 3 function OPC UA Pub/Sub (TF6105), Beckhoff provides a package that can be used to configure and use both OPC UA Pub/Sub UDP and MQTT Publisher and Subscriber directly in TwinCAT 3.

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