Mitsubishi Electric MELSERVO-J4 Instruction Manual page 51

1. TROUBLESHOOTING FOR SERVO AMPLIFIER (DRIVE UNIT)
Alarm No.: 32 Name: Overcurrent
Alarm content
Detail
Detail name
No.
32.1 Overcurrent (7) Something near the
detected at
hardware
detection circuit
(during
operation)
32.2 Overcurrent (1) The servo gain is high.
detected at
software
detection
function (during
operation)
(2) The servo amplifier is
(3) A ground fault or short
(4) The servo motor is
(5) The connection
(6) Something near the
32.3 Overcurrent Check it with the check method for [AL. 32.1].
detected at
hardware
detection circuit
(during a stop)
32.4 Overcurrent Check it with the check method for [AL. 32.2].
detected at
software
detection
function (during
a stop)
A current higher than the permissible current was applied to the servo amplifier.
Cause
Check the noise,
device caused it. ambient temperature,
etc.
Check if an oscillation
is occurring.
Disconnect the servo
malfunctioning. motor power cables
(U/V/W) and check if
the alarm occurs.
Check if only the
occurred at the servo servo motor power
motor power cable. cable is shorted.
Disconnect the servo
malfunctioning. motor power cables
on motor side, and
check insulation of
the motor (between
U/V/W/ /
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 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.
1 - 44
Action Target
Take [A]
countermeasures [B]
against its cause. [RJ010]
[GF]
Check it with the
check method for
[AL. 45.1].
Reduce the speed [A]
loop gain ([Pr. [B]
PB09]). [WB]
[RJ010]
For MR-J4-03A6(-
[GF]
RJ) and MR-J4W2-
0303B6, check if the
main circuit power
supply voltage is 48
V DC even though
the setting is 24 V
DC.
Check (2).
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]
[GF]