Using LogicLab or CODESYS, both are completely free programming tools.
The IEC 61131-3 represents the first real attempt to standardize the programming languages used in industrial automation.
The standard has a world wide diffusion and it’s indipendent from systems manufactures.
The languages consist of two versions of textual and three versions of graphical:
- Instruction List, IL
- Structured Text , ST
- Ladder Diagram , LD
- Functional Block Diagram, FBD
- Sequential Function Chart, SFC