MAD130B-0050 

维修PLC先后顺序是怎样的？

先动口再动手

1）维修PLC时，不要立即直接动手，而是先询问故障发生前后的情况、故障现象。

2）如果对生疏的PLC维修，应先了解其工作原理。

先清洁再维修

维修PLC时，可以打开机子，首先进行清洁PLC。

先外后内

维修PLC时，先检查外部现象与原因，如果外部正常，则然后检查PLC内部。

先无电判断后通电判断

首先在没有通电的情况下，先判断熔丝是否损坏、是否不通电就可以判断出故障点。如果不能够判断出来，则再通电检查PLC。

 

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