Mitsubishi Electric MELSERVO-J4 Instruction Manual Trouble Shooting page 47

1. TROUBLESHOOTING
Alarm No.: 51 Name: Overload 2
Alarm content
Detail
Detail name
No.
51.1 Thermal (1) The servo motor power
overload error 3
during operation
(2)
(3)
(4) The torque is
(5) The servo amplifier is
(6) An encoder is
51.2 Thermal (1) A moving part collided
overload error 3
during a stop
(2) The servo motor power
(3) The connection of the
(4) The connection of the
(5) The torque is saturated.
(6) The servo amplifier is
(7) An encoder is
Maximum output current flowed continuously due to machine collision or the like.
Cause
Check the servo motor
cable was power cable.
disconnected.
The connection of the Check the wiring of U,
servo motor is incorrect. V, and W.
The connection of the Check if the encoder
encoder cable is cable is connected
incorrect. correctly.
Check the peak load
insufficient. ratio.
Replace the servo
malfunctioning. amplifier, and then
check the
repeatability.
Replace the servo
malfunctioning. motor, and then check
the repeatability.
Check if it collided.
against the machine.
Check it with the check method for [AL. 51.1].
cable was
disconnected.
servo motor is incorrect.
encoder cable is
incorrect.
malfunctioning.
malfunctioning.
Check method Check result
It is disconnected.
It is not disconnected. Check (2).
It is incorrect.
It is correct.
It is incorrect.
It is correct.
The torque is
saturated.
The torque is not
saturated.
It is not repeatable.
It is repeatable.
It is not repeatable.
It collided.
It did not collide.
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Action Target
Repair or replace the [A]
servo motor power [B]
cable. [WB]
[RJ010]
Connect it correctly.
Check (3).
Connect it correctly.
Check (4).
Reduce the load or
review the operation
pattern. Or use a
larger capacity motor.
Check (5).
Replace the servo
amplifier.
Check (6).
Replace the servo
motor.
Check operation
pattern.
Refer to (2).