Can I get some more information on this? I'm dealing with a similar issue. Had intermittent DCSS connection before it disappeared completely. Connection good through traveller. Replaced iMotion board, no change. Was advised through my tech support (who, like most people in Florida, make up for what they don't know with exaggerated arrogance) to get a new MLB I/O. Did that and then, just because we've all experienced this bad luck, put the new board in and found the redundancy relays were picking and dropping every 20 seconds. Swapped CPUs with the other car and narrowed it down to that... But, while that will fix my redundancy relay issue, I'm not convinced it's gonna fix the communication problem.

I can plug into the door operator and change to multidrop there. But when I plug in from the ring board or MCSS, the tool says "Online to multidrop" and stops there. Can't access anything.