PLCs cyclically execute IEC 61131-3 programs and field IO — the core of industrial control. Siemens SIMATIC (S7-1200/1500, ET 200SP), Beckhoff TwinCAT, B&R Automation Studio, Phoenix Contact PLCnext and WAGO PFC lead.
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PLCs cyclically execute logic programs and field IO — the core of industrial control. Leaders: Siemens S7, Beckhoff T...
PLCs cyclically execute logic programs and field IO — the core of industrial control. Leaders: Siemens S7, Beckhoff TwinCAT, Phoenix Contact, B&R, WAGO.
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FAQ
Q S7-1200 vs S7-1500?
A
S7-1200: 200 IO ceiling, ~30 ms scan, small machines. S7-1500: 5-10x performance, integrated motion + safety + web server, 1 ms scan, 200-8000 IO production lines.
Q PROFINET vs EtherCAT?
A
Siemens ecosystem → PROFINET (IRT 1 ms); Beckhoff → EtherCAT (100 μs). Mixed-brand sites prefer PROFINET; machine-tool servos favor EtherCAT.
Q When is F-PLC needed?
A
Robot cells, presses, CNC work zones per EN ISO 13849-1 from PL d. F-PLC saves 30-40% engineering vs separate safety controller.