CI854 warning & redundancy Problem
In our ABB DCS system,we have one node with redundant PM866 controller and redundant CI854 cards.In this node we have 2 redundant profibus with 4 No. CI854 cards.I have attached a picture that shows our hardware config.As you can see in picture for node PLC_CORE,there is two redundant communication interface (the name of first is RIO_1 and other is External CI854).For the first one,we dont have any prolem and redundancy works fine without any error or fault and LED status of two CI854 idicates everything is ok,but in second one (EXternal CI854) in one of CI854 Fault LED is on and there is warning redundancy in CI854 status.I have attached 2 photos that indicate this situation.I changed CI854 card with Fault LED and also I changed baseplate of that,but nothing changed and Fault exist.Please help me to find what is the problem.
Thanks a lot.
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