1734-IK++++1734-IK

++++

输出阶梯的设计输出阶梯

    如图2b所示。其设计方法是：（1）在控制流程图中，找出某输出继电器M在哪一步开始得电和在哪一步开始失电，以此确定其得电信号（步进阶梯中使M开始得电的辅助继电器常开触点）和失电信号（步进阶梯中使M开始失电的辅助继电器常闭触点）；（2）将得电信号、失电信号和受控输出继电器线圈串联。如果某个输出继电器在一个工作循环中多次得电失电，则将每次得失电的串联信号互相并联即可。例如，图1中输出继电器Y1要求在步1和步3得电，在其余步失电。在图2b画其控制回路时，将图1所示的*次得电信号M1和*次失电信号M2串联，第二次得电信号M4和第二次失电信号串联，然后将二者并联起来，再与Y1的线圈串联便构成Y1的控制回路。其余依此类推。

：张亮（工程师）    专线：
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