基于IEC 61131-3标准的可编程控制器多语言编程研究

Study on Programmable Logic Controller Multi-Languages Programming Based on IEC 61131-3 Standard

以实现PLC指令集为背景,介绍了可编程控制器编程语言国际标准IEC61131-3的主要内容,包括两种文本语言:指令表IL和结构化文本语言ST,两种图形语言:梯形图语言LD和功能块图语言FBD,以及具有文本和图形两种表现形式的顺序功能图SFC语言;阐述了这些编程语言在PLC中的应用,给出了PLC编程语言的解释方法。

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.