That standard defines the Sequential Function Chart (SFC) language, used to structure the internal organization of a program, as well as four interoperable programming languages: Instruction List, ...

These include Relay ladder logic, Function Block diagram, Structured Text, Instruction List, Sequential Function Chart, and Continuous Function Chart.

Graphical ladder logic function block diagram sequential function chart Textual structured text instruction list The following example of ladder logic shows how logical AND and OR gates are ...

Arduino has released Arduino PLC IDE a new version of its IDE (integrated development environment) software for use with PLCs (programmable logic controllers). The software supports the use of Ladder ...