Mitsubishi Electric Melservo-J4 Instruction Manual page 70

Alarm No.: 51
Alarm content
Detail Detail name
No.
51.1 Thermal
overload error 3
during
operation
51.2 Thermal
overload error 3
during a stop
1 TROUBLESHOOTING FOR SERVO AMPLIFIER (DRIVE UNIT)
68
1.4 Remedies for alarms
Name: Overload 2
 Maximum output current flowed continuously due to machine collision or the like.
Cause Check method
(1) The servo motor power Check the servo motor
cable was power cable.
disconnected.
(2) The connection of the Check the wiring of U/V/
servo motor is incorrect. W.
(3) The connection of the Check if the encoder
encoder cable is cable is connected
incorrect. correctly.
(4) The direction of Check polarities of the
mounting linear encoder linear encoder and the
is incorrect. linear servo motor.
(5) The torque is Check the peak load
insufficient. ratio.
(6) The servo amplifier is Replace the servo
malfunctioning. amplifier, and then check
the repeatability.
(7) An encoder or servo Replace the servo motor,
motor is malfunctioning. and then check the
repeatability.
(1) A moving part collided Check if it collided.
against the machine.
(2) The servo motor power Check it with the check method for [AL. 51.1].
cable was
disconnected.
(3) The connection of the
servo motor is incorrect.
(4) The connection of the
encoder cable is
incorrect.
(5) The direction of
mounting linear encoder
is incorrect.
(6) The torque is saturated.
(7) The servo amplifier is
malfunctioning.
(8) An encoder is
malfunctioning.
Check result Action
It is disconnected. Repair or replace the
servo motor power cable.
It is not disconnected. Check (2).
It is incorrect. Connect it correctly.
It is correct. Check (3).
It is incorrect. Connect it correctly.
It is correct. Check (4).
The mounting direction is Mount it correctly.
incorrect. Review the "encoder
pulse count polarity
selection" setting of the
parameter as required.
[A]: [Pr. PC45] [B] [WB]
[GF]: [Pr. PC27]
The mounting direction is Check (5).
correct.
The torque is saturated. Reduce the load or
review the operation
pattern. Or use a larger
capacity motor.
The torque is not Check (6).
saturated.
It is not repeatable. Replace the servo
amplifier.
It is repeatable. Check (7).
It is not repeatable. Replace the servo motor.
It collided. Check operation pattern.
It did not collide. Refer to (2).
Target
[A]
[B]
[WB]
[RJ010]
[GF]
[A]
[B]
[WB]
[GF]
[A]
[B]
[WB]
[RJ010]
[GF]