Study on Programmable Logic Controller Multi-Languages Programming Based on IEC 61131-3 Standard
HE Xu-ping · Jiangsu Electrical Apparatus · 2008
Taking realizing programmable logic controller(PLC)instruction set as background,introduction was made to the main contents of PLC programming languages international standard IEC 61131-3,including two kinds of textual languages:instruction list(IL) and structured text(ST),two graphical languages:ladder diagram(LD)and function block diagram(FBD);and sequential function chart(SFC) with both textual and graphical two representation forms;description was made to the applications of these programming languages in the PLC with interpretive methods of these PLC programming languages.