In one of our ACS880 drive, we are getting the over speed faults, but the real problem was in the motor connections

we have a ACS880 VFD application in forward reverse mode operation, it is getting tripped on overspeed fault (7310), i have checked the motor parameters control mode set to DTC and ID run has done on standstill, when i switched control mode to scaler, then it is started to trip on over current (2310), after checking the cable we have found their is problem in cable terminator, after that the issue is gone,

but my question is why the drive was tripping on overspeed? instead of short circuit or undervoltage or any other power related fault ?

attach- Drive composer fault window