摘要
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.
出处
《江苏电器》
2008年第3期19-21,49,共4页