1756-IF8H

1756-IF8H

1756-IF8H

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