THE use of function blocks for programming of programmable logic controllers (PLCs) is gaining wider acceptance. Rather than the classic “contact and coil” representation of ladder diagram or relay ...

This paper attempts a journey right from configuring a PLC, writing application program to code generation along with run-time configurations and RTOS abstraction for embedding it into PLC hardware ...

The section on programming languages defines two graphical languages — ladder diagram and function block diagram — and two text-based languages — instruction list and structured text.

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, ...