Ignoramus31989 wrote:

Maybe EMC has some kind of logic that if there is no motion detected
when it should be detected, it would do some kind of software shutdown?

If it is commanding motion, and no movement is detected, then it will
get a following error, after some time (usually short).
However, if the encoder were to fail while EMC was NOT expecting
movement, then it would NOT get a following error.
That is kind of a problem. A velocity servo would then move at a
probably modest rate as long as no motion was commanded.
This could be so slow you wouldn't even detect it!

Jon