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福建中海德陈工，180-0500-6671
PLC输入板故障常发生在自动加工时，CRT上显示报警，机床不能工作。例如FANUC 3T-A系统数控机床自动加工时，CRT上显示“NOT READY”，机床不能正常工作，报警显示主控板无论CNC或PLC的主体是好的，没有报警具体内容。怀疑伺服放大器或PLC中存在故障。但如果伺服放大器有故障，应该在启动自诊断时报警。故故障可为PLC的I/O接口板，这种故障属于硬件故障，主要成因应是对应输出”NOT READY”的前面环节电路硬件故障。
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