IEC61131-3 programming languages
The IEC61131-3 specification defines five different programming languages and a set of common elements. All languages are optional, but at least one must be supported to claim compliance with the specification.
The programming languages are as follows:
- Instruction list (IL) language elements
- Structured text language (ST) elements
- Ladder diagram (LD) language elements
- Sequential function chart (SFC) language elements
- Function block diagram (FBD) language elements
- Common language elements
- Common graphical elements
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