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li19930121
級別: 工控俠客
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樓主  發(fā)表于: 2022-07-14 15:40
圖片：
重新上電也不行。供電220V正常
liudongtian
我是小電工
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1樓  發(fā)表于: 2022-08-04 18:08
1.斷電，脫開(kāi)所有的擴展模塊，然后送電，看看本體還報警不，我這里很多都是拓展模塊引起的PLC報錯；
2.如果本體持續報警，換1根通訊線(xiàn)嘗試讀一下，如果不行就是PLC的硬件故障，只能委外維修或者更換。

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