顺序控制中PLC的程序设计方法

摘要

结合实例介绍顺序控制的编程思想和顺序功能图的设计方法,针对步进顺控指令编程法、起保停电路编程法、置位复位指令编程法和移位指令编程法4种PLC程序设计方法,给出了将顺序功能图转换成梯形图的方法,总结归纳了4种编程方法的设计要点,为程序的优化设计提供参考.%The paper introduces the programming ideas of sequence control and the design of sequence function chart by using examples.It discusses four PLC programming methods： stepping sequence control instructions programming method,start-keep-stop circuit programming method,set and reset instructions programming method and shift instructions programming method.It puts forward the method of converting sequence function chart into ladder.It summarizes the key points for the design of four programming methods,which provides reference for program optimization.