IEC 61131-3
Programmable controllers — Part 3: Programming languages
Scope
Defines the five programming languages used on programmable logic controllers — Structured Text, Ladder Diagram, Function Block Diagram, Sequential Function Chart and Instruction List — together with a common data type and program organisation model.
Notes
The reason a control program written for one PLC platform is recognisable to somebody who works on another. Underlies TwinCAT, CODESYS, TIA Portal and most of the automation platforms used for entertainment machinery.
Where to get it
Sources
- IEC 61131-3 — International Electrotechnical Commission primary
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