1756-IF8H

1756-IF8H

1756-IF8H

FX系列PLC通用定時器的工作原理如下：
當(dāng)定時條件為ON,，指定的定時器對PLC內(nèi)部的100ms,、10ms,、1ms時鐘脈沖進(jìn)行累加計數(shù),，當(dāng)前值等于設(shè)定值時,，定時器的常開觸點(diǎn)接通,，常閉觸點(diǎn)斷開,。當(dāng)定時條件變?yōu)镺FF,，定時器被復(fù)位，常開觸點(diǎn)斷開,，常閉觸點(diǎn)接通,，當(dāng)前值恢復(fù)為零,。
 

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