OPC UA, MQTT, S7, MES, ERP and historians: how to get data out of legacy and new machines and into systems you can actually analyse. With decision matrices, fault diagnosis and reference architectures for brownfield plants.
A complete ISA-95 topic schema, naming rules with the reasoning behind them, an honest assessment of Sparkplug B and a grid for choosing a broker - vendor-neutral, including a section on when you do not need a UNS at all.
21 min read
Brownfield is the normal case. Four escalation levels show how to reach the data inside an existing machine - and why capturing it is the smaller part of the work.
21 min read
OPC UA models meaning and access at the asset; MQTT moves messages upwards through a broker. Which protocol carries which job, what Sparkplug B adds, and what the bridge between the two looks like.
19 min read
The S7-1500's built-in OPC UA server or Snap7 on port 102? A decision table by PLC generation, the licence classes, the PUT/GET setting, optimized data blocks and a working python-snap7 example.
21 min read
Five integration patterns between MES and ERP compared — and then the part almost nobody writes about: confirmation logic, duplicate protection and what happens when one system goes down.
20 min read
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