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PLC顺序控制设计法
PLC顺序控制就是按照生产工艺预先规定的顺序,在各个输入信号的作用下,根据内部状态和时间的顺序,在生产过程中各个执行机构自动地有序地进行工作。使用顺序控制设计法时首先根据系统的工艺过程，画出顺序功能图，然后根据顺序功能图画出PLC梯形图。
PLC顺序控制设计法是一种***的设计方法，很容易被初学者接受，程序的调试、修改和阅读也很容易，并且大大缩短了设计周期，提高了设计效率。
二、PLC顺序控制设计法的设计基本步骤
1.步的划分
分析被控对象的工作过程及控制要求，将系统的工作过程划分成若干个阶段，这些阶段称为“步”。步是根据PLC输出量的状态划分的，只要系统的输出量状态发生变化，系统就从原来的步进入新的步。在每一步内PLC各输出量状态均保持不变，但是相邻两步输出量总的状态是不同的。
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地址：厦门思明区湖滨东路湖光大厦8楼B
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