Okuma Alarm-A 1156 MCS DC-bus voltage alarm
The DC-bus voltage in the inverter unit has abnormally risen or fallen, disabling the inverter from supplying the current.
Object
Axis name or none (spindle)
Character-string
None
Code
XXXXYYYY
XXXX= Detected overvoltage in hexadecimal [15.3 mV]
YYYY= Detected undervoltage in hexadecimal [15.3 mV]
Probable Faulty Locations
In the case of voltage rise,
– Power unit
In the case of voltage drop,
– Power unit
– Inverter unit
– Instantaneous power interruption