6ES7 307-1BA01-0AA0

6ES7 307-1BA01-0AA0       6ES7 307-1BA01-0AA0       6ES7 307-1BA01-0AA0

PLC的硬件故障较为直观地就能发现，维修的基本方法就是更换模块。根据故障指示灯和故障现象判断故障模块是检修的关键，盲目的更换会带来不必要的损失。

(1)电源模块故障。

 一个工作正常的电源模块，其上面的工作指示灯如“AC”、“24VDC”、“5VDC”、“BATT”等应该是绿色长亮的，哪一个灯的颜色发生了变化或闪烁或熄灭就表示那一部分的电源有问题。

“AC”灯表示PLC的交流总电源，“AC”灯不亮时多半无工作电源，整个PLC停止。

这时就应该检查电源保险丝是否熔断，更换熔丝是应用同规格同型号的保险丝，无同型号的进口熔丝时要用电流相同的快速熔丝代替。如重复烧保险丝说明电路板短路或损坏，更换整个电源。

“5VDC”、“24VDC”灯熄灭表示无相应的直流电源输出，当电源偏差超出正常值5%时指示灯闪烁，此时虽然PLC仍能工作，但应引起重视，必要时停机检修。

“BATT”变色灯是后备电源指示灯，绿色正常，黄色电量低，红色故障。黄灯亮时就应该更换后备电池，手册规定两到三年更换锂电池一次，当红灯亮时表示后备电源系统故障，也需要更换整个模块。

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