Mitsubishi Electric MELSERVO-J4 Instruction Manual Trouble Shooting page 33

1. TROUBLESHOOTING
Alarm No.: 32 Name: Overcurrent
Alarm content
Detail
Detail name
No.
32.1 Overcurrent (1) The servo amplifier is
detected at
hardware
detection circuit
(during
operation)
(2)
(3) The servo motor is
(4) The dynamic brake is
(5)
(6) Something near the
(7) Something near the
32.2 Overcurrent (1) The servo gain is high.
detected at
software
detection
function (during
(2) The servo amplifier is
operation)
(3)
(4) The servo motor is
(5)
(6) Something near the
Current that flew is higher than the permissible current of the servo amplifier.
Cause
Disconnect the servo
malfunctioning. motor power cables
(U, V, and W) and
check if the alarm
occurs.
A ground fault or short Check if only the servo
occurred at the servo motor power cable is
motor power cable. shorted.
Disconnect the servo
malfunctioning. motor power cables on
motor side, and check
insulation of the motor
(between U, V, W, and
Check if the error
malfunctioning. occurs when you turn
on the servo-on
command.
The connection Check the connection
destination of the destinations of CN2A,
encoder cable is CN2B, and CN2C.
incorrect.
Check the noise,
device caused it. ambient temperature,
etc.
Check the noise,
device caused it. ambient temperature,
etc.
Check if an oscillation
is occurring.
Disconnect the servo
malfunctioning. motor power cables
(U, V, and W) and
check if the alarm
occurs.
A ground fault or short Check if only the servo
occurred at the servo motor power cable is
motor power cable. shorted.
Disconnect the servo
malfunctioning. motor power cables on
motor side, and check
insulation of the motor
(between U, V, W, and
The connection Check the connection
destination of the destinations of CN2A,
encoder cable is CN2B, and CN2C.
incorrect.
Check the noise,
device caused it. ambient temperature,
etc.
Check method Check result
It occurs.
It does not occur.
It is shorted.
It is not shorted.
A ground fault is
occurring.
A ground fault is not
occurring.
).
It occurs.
It does not occur.
It is not correct.
It is correct.
It has a failure.
It has a failure.
It has no failure.
An oscillation is
occurring.
An oscillation is not
occurring.
It occurs.
It does not occur.
It is shorted.
It is not shorted.
A ground fault is
occurring.
A ground fault is not
occurring.
).
It is not correct.
It is correct.
It has a failure.
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Action Target
Replace the servo [A]
amplifier. [B]
[WB]
Check (2).
[RJ010]
Replace the servo
motor power cable.
Check (3).
Replace the servo
motor.
Check (4).
Replace the servo
amplifier.
[WB]: Check (5).
[A] [B] [RJ010]:
Check (7).
Wire it correctly. [WB]
Check (6).
Take
countermeasures
against its cause.
Take [A]
countermeasures
[B]
against its cause.
[RJ010]
Check it with the
check method for [AL.
45.1].
Reduce the speed [A]
loop gain ([Pr. PB09]). [B]
[WB]
Check (2).
[RJ010]
Replace the servo
amplifier.
Check (3).
Replace the servo
motor power cable.
Check (4).
Replace the servo
motor.
Check (5).
Connect it correctly. [WB]
Check (6).
Take [A]
countermeasures [B]
against its cause. [WB]
[RJ010]