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zycolin
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樓主  發(fā)表于: 2017-12-23 18:59
為什么點(diǎn)動(dòng)不成功，百思不得其解,高手點(diǎn)拔 


15966379812
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1樓  發(fā)表于: 2018-09-24 13:39
電動(dòng)斷不開(kāi)，慢了一個(gè)掃描周期，樓主仔細研究下PLC的掃描周期的問(wèn)題
15966379812
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2樓  發(fā)表于: 2018-09-24 16:15
假設按下x1 時(shí)一個(gè)掃描周期，第一個(gè)掃描周期，按下x1，Y0輸出，第二個(gè)掃描周期因為y0輸出，所以Y0敞開(kāi)點(diǎn)閉合，但是x1是敞開(kāi)，所以x1常閉點(diǎn)還是常閉，Y0就一直閉合了。

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