Okuma Alarm-P 0857 MCS Motor overcurrent
The inverter unit has detected excessive current flowing in the motor cable.
Object
Axis name or none (spindle)
Character-string
None
Code
XXXXYYYY
XXXX= U-phase current detected when this alarm occurs, expressed in signed hexadecimal [Tolerance: 3FFF]
YYYY= V-phase current detected when this alarm occurs, expressed in signed hexadecimal [Tolerance: 3FFF]
Probable Faulty Locations
– Inverter unit
– Faulty motor insulation