MDD093C-N-040
維修PLC先后順序是怎樣的？
先動口再動手
1）維修PLC時，不要立即直接動手，而是先詢問故障發(fā)生前后的情況、故障現(xiàn)象。
2）如果對生疏的PLC維修，應先了解其工作原理。
先清潔再維修
維修PLC時，可以打開機子，首先進行清潔PLC。
先外后內
維修PLC時，先檢查外部現(xiàn)象與原因，如果外部正常，則然后檢查PLC內部。
先無電判斷后通電判斷
首先在沒有通電的情況下，先判斷熔絲是否損壞、是否不通電就可以判斷出故障點。如果不能夠判斷出來，則再通電檢查PLC。
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