Okuma Alarm-P 0870 MCS Magnetic encoder alarm
The magnetic pulse generator has become unable to detect the motor speed. Or, the number of magnetic encoder gear teeth
does not match the data in the MCS data file.
Object
Axis name or none (spindle)
Character-string
None
Code
XXXXYYYY
XXXX= Error content
A->A-phase voltage is abnormal.
B->B-phase voltage is abnormal.
C->Magnetic encoder data error
Others-> Servo data file set value detected when the count over error occurred in the magnetic encoder
B->B-phase voltage is abnormal.
C->Magnetic encoder data error
Others-> Servo data file set value detected when the count over error occurred in the magnetic encoder
(No. of PG gear teeth * 4)
YYYY= Additional error data (Varies with XXXX.)
If XXXX is A, A-phase voltage appears.
If XXXX is B, B-phase voltage appears.
If XXXX is C, 0 (fixed) appears.
Others-> Detected count value of magnetic encoder
If XXXX is B, B-phase voltage appears.
If XXXX is C, 0 (fixed) appears.
Others-> Detected count value of magnetic encoder
Probable Faulty Locations
– Magnetic encoder or its wiring, or large gap between magnetic encoder and gear
– Mismatch between the number of gear teeth of magnetic encoder and the servo data file data