SoMachine / Codesys is an open international standard IEC 61131-3  for programmable logic controllers.
The following programming languages are supported:
IL (instruction list) is an assembler like programming language (Is now deprecated but available for backward compatibility)
ST (structured text) is similar to programming in Pascal or C
LD (ladder diagram) enables the programmer to virtually combine relay contacts and coils
FBD (function block diagram) enables the user to rapidly program both Boolean and analogue expressions
SFC (sequential function chart) is convenient for programming sequential processes and flows
Additional graphical editor available in CODESYS not defined in the IEC standard:
CFC (Continuous Function Chart) is a sort of freehand FBD editor. Other than in the network-oriented FBD editor where the connections between inputs, operators and outputs are set automatically they have to be drawn by the programmer. All boxes can be placed freely which makes it possible to program feedback loops without interim variables.
Released for:Schneider Electric Indonesia