A02020 ABB

ABB VS 125B
ABB 202046000C
abb Printed Circuit Board/Model GDB021BE01/HIEE300766R0001
ABB HEA5000D
ABB BBC Brown Boveri Electric MD17HS +2WE BBC
ABB 3HAC16831-1

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Description

由于外界的干扰而出现时通时断的“抖动”现象。这种现象在继电器系统中由于继电器的电磁惯性一般不会造成什么影响,但在PLC系统中,由于PLC扫描工作的速度快,扫描周期比实际继电器的动作时间短得多,所以抖动信号就可能被PLC检测到

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