Programming in the Ladder Diagram

In CODESYS 4, you can program in the Ladder Diagram (LD) implementation language.

The Ladder Diagram is a graphical programming language for programmable logic controllers. Because the representation of the programming logic resembles a circuit diagram, this language is particularly well suited for programming binary controllers. Binary controllers allow binary input signals (sensors) to be logically connected to binary output signals (actuators).

The programming language is standardized in the IEC 61131-3 standard and is widely used in automation technology.