Category GuideSpecForge Editorial2026 / 04

PLC Selection Guide — Siemens SIMATIC / Mitsubishi MELSEC / Rockwell ControlLogix

PLCs are the core control units for process and discrete automation. SpecForge catalogs 2,840+ PLC models, from compact CPUs (CPU 1212) to large distributed systems (Studio 5000), with a PROFINET / EtherNet/IP / CC-Link IE protocol support matrix.

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The in-depth selection guide for this category (covering working principles, technical parameters, application scenarios, manufacturer comparison, and selection decisions) is currently in development. Expected within 2 weeks. In the meantime, browse related categories or contact our editorial team.

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A PLC (Programmable Logic Controller) is the brain of industrial automation systems. SpecForge compiles PLC model databases from leading manufacturers including Siemens, Mitsubishi, Rockwell Automation, Schneider Electric, Omron, ABB, and Honeywell. Coverage includes compact CPUs, mid-range rack-mount controllers, large distributed controllers, safety PLCs, and motion PLCs, with specifications spanning I/O point count, scan cycle time, memory capacity, communication protocols, SIL rating, and price range. Whether for new production lines, equipment retrofits, or spare parts replacement, you can find model comparisons and official documentation here.