Mitsubishi Electric MELSERVO-J3W Series Instruction Manual page 155

8. TROUBLESHOOTING
Alarm No.32
Alarm description
Display Name
32.1 Overcurrent
detected at
hardware
detection circuit
(during
operation).
32.2 Overcurrent
detected at
software
detection function
(during
operation).
32.3 Overcurrent
detected at
hardware
detection circuit
(during a stop).
32.4 Overcurrent
detected at
software
detection function
(during a stop).
Name: Overcurrent
Current that flew is the permissible current of the servo amplifier or higher.
Cause
(1) Servo amplifier is faulty.
(2) Short or ground fault
occurs at servo motor
power cable.
(3) Servo motor is faulty.
(4) Overcurrent is mistakenly
detected from the surge
noise in the dynamic
brake operation.
(5) Fault is generated from
the surrounding
environment.
(1) Servo gain is high.
(2) Servo amplifier is faulty.
(3) Short or ground fault
occurs at servo motor
power cable.
(4) Servo motor is faulty.
(5) Fault is generated from
the surrounding
environment.
(1) Servo amplifier is faulty.
(2) Short or ground fault
occurs at servo motor
power cable.
(3) Servo motor is faulty.
(4) Fault is generated from
the surrounding
environment.
(1) Servo gain is high.
(2) Servo amplifier is faulty.
(3) Short or ground fault
occurs at servo motor
power cable.
(4) Servo motor is faulty.
(5) Fault is generated from
the surrounding
environment.
Stop method: All axes stop
Checkpoint
Check if this alarm Appears.
appears even when
power cable (UVW) is
Does not appear.
disconnected.
Check if only the power Shorted.
cable is shorted.
Not shorted.
Disconnect power cables Ground fault occurs at
on the servo motor side, the servo motor.
and check insulation of
Ground fault does not
the motor (among U, V,
occur at the servo
W, FG).
motor.
Check if the dynamic Applied.
brake is applied once in
10 minutes or more
frequently while the servo
motor is running.
Not applied.
Check for noise and other Problem found.
factors.
Check for vibration. Vibration is occurring.
Vibration is not
occurring.
Examine checkpoints described in the alarm display "32.1".
Examine checkpoints described in the alarm display "32.1".
Examine checkpoints described in the alarm display "32.2".
8 - 16
Finding Action
Replace the servo
amplifier.
Check (2).
Replace the power
cable.
Check (3).
Replace the servo
motor.
Check (4).
Apply the dynamic
brake less frequently
than once in 10
minutes.
Check (5).
Take countermeasure
according to the
cause.
Set speed loop gain
smaller.
Check (2).