8. TROUBLESHOOTING
8 - 16
Alarm No.32
Name: Overcurrent
Stop method: All axes stop
Alarm description
Current that flew is the permissible current of the servo amplifier or higher.
Display Name
Cause
Checkpoint
Finding
Action
32.1
(1) Servo amplifier is faulty.
Appears.
Replace the servo
amplifier.
Check if this alarm
appears even when
power cable (UVW) is
disconnected.
Does not appear.
Check (2).
(2)
Check if only the power
cable is shorted.
Shorted.
Replace the power
cable.
Overcurrent
detected at
hardware
detection circuit
(during
operation).
Short or ground fault
occurs at servo motor
power cable.
Not shorted.
Check (3).
(3) Servo motor is faulty.
Ground fault occurs at
the servo motor.
Replace the servo
motor.
Disconnect power cables
on the servo motor side,
and check insulation of
the motor (among U, V,
W, FG).
Ground fault does not
occur at the servo
motor.
Check (4).
(4) Overcurrent is mistakenly
detected from the surge
noise in the dynamic
brake operation.
Applied.
Apply the dynamic
brake less frequently
than once in 10
minutes.
Check if the dynamic
brake is applied once in
10 minutes or more
frequently while the servo
motor is running.
Not applied.
Check (5).
(5) Fault is generated from
the surrounding
environment.
Check for noise and other
factors.
Problem found.
Take countermeasure
according to the
cause.
32.2
(1) Servo gain is high.
Check for vibration.
Vibration is occurring. Set speed loop gain
smaller.
Vibration is not
occurring.
Check (2).
(2) Servo amplifier is faulty.
Examine checkpoints described in the alarm display "32.1".
Overcurrent
detected at
software
detection function
(during
operation).
(3) Short or ground fault
occurs at servo motor
power cable.
(4) Servo motor is faulty.
(5) Fault is generated from
the surrounding
environment.
32.3
(1) Servo amplifier is faulty.
Examine checkpoints described in the alarm display "32.1".
(2) Short or ground fault
occurs at servo motor
power cable.
(3) Servo motor is faulty.
Overcurrent
detected at
hardware
detection circuit
(during a stop).
(4) Fault is generated from
the surrounding
environment.
32.4
(1) Servo gain is high.
Examine checkpoints described in the alarm display "32.2".
(2) Servo amplifier is faulty.
(3) Short or ground fault
occurs at servo motor
power cable.
Overcurrent
detected at
software
detection function
(during a stop).
(4) Servo motor is faulty.
(5) Fault is generated from
the surrounding
environment.
Summary of Contents for MELSERVO-J3W Series
Page 17: ...8 MEMO ...
Page 27: ...1 FUNCTIONS AND CONFIGURATION 1 10 MEMO ...
Page 87: ...4 STARTUP 4 14 MEMO ...
Page 117: ...5 PARAMETERS 5 30 MEMO ...
Page 129: ...6 GENERAL GAIN ADJUSTMENT 6 12 MEMO ...
Page 185: ...10 CHARACTERISTICS 10 8 MEMO ...
Page 241: ...11 OPTIONS AND AUXILIARY EQUIPMENT 11 56 MEMO ...
Page 274: ...13 USING A LINEAR SERVO MOTOR 13 25 1 2 3 4 ...