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上善若水非凡
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樓主  發(fā)表于: 2021-10-09 10:38
圖片：
D164是不是等于0
cvlsam
富士低壓，POD（觸摸屏），PLC專(zhuān)賣(mài)
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1樓  發(fā)表于: 2021-10-10 09:02
D164的值不確定，取決于T55觸點(diǎn)的被掃描時(shí)機，因為PLC中的定時(shí)器是異步掃描的，掃描第一個(gè)T55時(shí)，如果定時(shí)時(shí)間沒(méi)有到，那么就不會(huì )執行什么，當掃描到第二個(gè)T55觸點(diǎn)時(shí)，此時(shí)定時(shí)時(shí)間到，就會(huì )接通，從而這種狀態(tài)下D164會(huì )有值。

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