1756-EN2TR

1756-EN2TR

1756-EN2TR

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，定時器的常開觸點接通，常閉觸點斷開。當(dāng)定時條件變?yōu)镺FF，定時器被復(fù)位，常開觸點斷開，常閉觸點接通，當(dāng)前值恢復(fù)為零。
 




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