IEC 61131-3 is a section of an International Electro-Technical Committee (IEC) standard that provides a definition for implementing PLC programming software.
The standard was first introduced in 1993 as the result of an effort to standardize the myriad PLC logic editors in the automation marketplace. The goal of the standard is to give automation professionals a familiar environment and set of tools to create PLC programs across vendor platforms.
Maple Systems HMI+PLC (HMC) and PLC (MLC) configuration software MAPware-7000 has editors implemented for all five programming languages defined by the standard:
- Ladder Diagram (LD)
- Function Block Diagram (FBD)
- Structured Text (ST)
- Instruction List (IL)
- Sequential Function Chart (SFC)