Dear All,
We are facing this problem in R30iA controller and it is occurring frequently and each time, the problem is resolved with a different countermeasure i.e., servo amp. replaced first time, back plane PCB second time, teach pendant third time. The replaced units are not faulty at all and work OK on different controller.
We use a single chain panel PCB. So, all the connections (EES1-EES11, EAS1-EAS11, SD4-SD41,EES2-EES21 etc), that manual suggests to check, are not present.
This robot is a ticking time bomb waiting to explode.