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quq125
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樓主  發(fā)表于: 2010-04-08 14:26
一設備控制箱，一臺達變頻器旁邊很近處是一OMRON的PLC，用了4年多，一直很正常，最近PLC的3個(gè)輸入點(diǎn)出現問(wèn)題，不給信號時(shí)，PLC輸入指示燈會(huì )亮，外部信號斷開(kāi)后，其指示燈不會(huì )馬上滅。變頻器關(guān)閉后，其輸入指示燈工作正常，請問(wèn)家園的朋友是什么原因，該怎么解決，很急
w7861
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1樓  發(fā)表于: 2010-04-08 15:27
接地不好了吧

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