Overspeed fault on ABB ACS M1 drive,
I am experiencing Overspeed fault on ACSM1 drive, I have checked overspeed/speed parameters that are correct. Drive show overspeed fault somtimes on 2 rpm sometime on 10 rpm somtimes on 100 rpm. Means, motor is not getting overspeed in actual but drive show over speed fault.
I have replaced Encoder, Encoder module (FEN-31), changed the encoder module slot.
Checked encoder supply voltage, every thing is fine.
Some time machine runs for 5 mins and sometimes gives the fault at start command.
Can someone help me to resolve this issue?