1756-HSC |
1756-HSC |
1756-HSC |
FX系列PLC通用定时器的工作原理如下:
当定时条件为ON,指定的定时器对PLC内部的100ms、10ms、1ms时钟脉冲进行累加计数,当前值等于设定值时,定时器的常开触点接通,常闭触点断开。当定时条件变为OFF,定时器被复位,常开触点断开,常闭触点接通,当前值恢复为零。
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1756-HSC |