IEC 61131-3 Programming Languages & CODESYS
TL;DR IEC 61131-3 is the global PLC language standard. Learn the five official languages, see how CODESYS and other IDEs fit in, and pick the right tool for your next automation project. Quick-Start FAQ Why learn IEC 61131-3? It’s vendor-neutral: master it once, code on virtually any PLC. Fastest way to practice? Download CODESYS or Open PLC , run the built-in soft-PLC simulator, and start coding today. Biggest myth? “Ladder is the only real PLC language.” Modern plants lean heavily on ST and FBD for complex logic. 🔹 IEC 61131-3 in a Nutshell Language Style Great For 1-Liner Ladder Diagram (LD) Graphical Electricians migrating to PLCs “Rungs & coils—looks like relay logic.” Function Block Diagram (FBD) Graphical Signal processing, PID loops “Plug-and-play logic blocks.” Structured T...