1746-OB16现货1746-OB16

1746-OB16
1746-OB16
1746-OB16

计数器有一个时钟脉冲端(CP)，它接受PLC内各种软继电器送入的脉冲信号，在图4中为输入继电器触点X00，当X00由断开到闭合，每变换一次输入一个脉冲信号，那么，计数器就从当前值减1，直到计数器当前值为0时，计数器线圈通电，它的常开触点闭合、常闭触

点断开，这些触点都可以在PLC内选择使用。

定时器(T)。定时器(TIMER，简写T)的工作时间即延时时间由程序设定。定时器线圈接受到输入信号后，按数值递减的方式进行。当前数值变为0时进行一次输出，即定时器常开触点闭合。

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