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。
Rosemount 3051 L2AA6FD21AAL4 Smart Family Hart
Siemens Simatic 6K7 343-2AH00-0XA0 6GK73432AH000XA0
GE 531X308PCSAAG1 Power Card
Siemens Simatic 6SE7015-OEP50 6SE70150EP50 MasterDrive
Siemens Simatic S5 6ES5 788-7LB11 6ES57887LB11
ABB DCS502-0025-51-21P2100 DCS50200255121P2100 Drive
Siemens Simatic S5 6ES55263LF11 6ES5 526-3LF11
Siemens 6GK1143-0AA01 6GK11430AA01 w/ Eprom