Skip to content

PLC Programming & Automation

Tutorials
Forum

industry 4.0

PLC Industry 4.0: OPC UA, MQTT and Real Data Models

September 13, 2026January 21, 2024 by PLC

Timing chart of an MQTT publish trigger: the broker connection drops and returns, a deadband exceeded pulse and a 30 second heartbeat each raise the publish trigger, and a store and forward flush follows the reconnection

What an Industry 4.0 project really changes on the PLC: the OPC UA server, a UDT to JSON data model, MQTT at the edge, retrofits and security.

Categories Articles Tags iiot, industry 4.0, mqtt, opc ua, s7-1500

Advertisement

plctr.com

PLC tutorials and examples, written by a controls engineer.

Topics

Safety PLC
Siemens TIA Portal
Rockwell Studio 5000
All tutorials

Site

Forum
Contact
Privacy and cookies

© 2026 PLC Programming & Automation • Built with GeneratePress