3BHB005922R0002 ABB

The process channel is at most a card fault or a local bus fault.One reason is that the card itself works over time,and the components are aging or damaged;in addition,the channel failure can also be caused by external signal grounding or strong point signal serially entering the card.Now the general card itself has taken good isolation measures,which will not lead to the expansion of faults under normal circumstances,but once such faults occur,it will directly cause abnormal process control or monitoring functions.Therefore,it is necessary to find out the cause of the failure in time and replace the card in time.

过程通道出现最多是卡件故障或就地总线故障。一种原因是卡件本身厂时间工作，元器件老化或损坏；另外，因外部信号接地或强点信号串入卡件也会导致通道故障。现在一般卡件本身都采取了良好的隔离措施，一般情况下不会导致故障的扩大，但此类故障一旦出现，则直接造成过程控制或监控功能的不正常。所以要及时查明故障原因，及时进行更换卡件。