[Al. 032_Overcurrent] - Mitsubishi Electric Melservo-J5 MR-J5 Series User Manual

[AL. 032_Overcurrent]

• A higher than the permissible current was applied to the servo amplifier.
[AL. 032.1_Overcurrent detected at hardware detection circuit (during operation)]
Cause
1.
The servo amplifier is malfunctioning.
2.
A ground fault or short occurred in the servo
motor power cable.
3.
The servo motor is malfunctioning.
4.
The dynamic brake is malfunctioning.
5.
The connection destination of the servo motor
power cable or the encoder cable is incorrect.
6.
There is an abnormality in the surrounding
environment.
[AL. 032.2_Overcurrent detected by software detection process (during operation)]
Cause
1.
The servo gain is high.
2.
The servo amplifier is malfunctioning.
3.
A ground fault or short occurred in the servo
motor power cable.
4.
The servo motor is malfunctioning.
5.
The connection destination of the servo motor
power cable or the encoder cable is incorrect.
6.
There is an abnormality in the surrounding
environment.
[AL. 032.3_Overcurrent detected at hardware detection circuit (during a stop)]
Page 38 [AL. 032.1_Overcurrent detected at hardware detection circuit (during operation)]
[AL. 032.4_Overcurrent detected at software detection function (during a stop)]
Page 38 [AL. 032.2_Overcurrent detected by software detection process (during operation)]
1 SERVO AMPLIFIER TROUBLESHOOTING
38
1.3 Handling methods for alarms/warnings
Check/action method
Check that this alarm occurs as the servo motor power cables (U / V / W) are
disconnected.
If the alarm occurs, replace the servo amplifier.
Check if the servo motor power cable has been shorted.
If short occurs, replace the servo motor power cable.
After disconnecting the servo motor power cables on the servo motor side,
check the insulation between phases (U, V, W
If a ground fault is present, replace the servo motor.
After confirming that the Cause 1, 2, and 3 did not apply, check if this alarm
occurs when turning on the servo-on command.
If the alarm occurs, replace the servo amplifier.
If the alarm does not occur, check 5.
Check the connection destination of the motor power cable or encoder cable.
Refer to "Connection example of power supply circuit" in the following manual.
MR-J5 User's Manual (Hardware)
Check the noise, ambient temperature, and others, and implement appropriate
countermeasures for the cause.
If a failure is not found in the surrounding environment, carry out the check/
action method for [AL. 045.1].
If there is noise, take countermeasures to reduce the noise.
Refer to "Noise reduction techniques" in the following manual.
MR-J5 User's Manual (Hardware)
Check/action method
Check if an oscillation is occurring.
If an oscillation is occurring, reduce the value in [Pr. PB09 Speed control gain].
Check that this alarm occurs as the servo motor power cables (U / V / W) are
disconnected.
If the alarm occurs, replace the servo amplifier.
Check if the servo motor power cable has been shorted.
If short occurs, replace the servo motor power cable.
After disconnecting the servo motor power cables on the servo motor side,
check the insulation between phases (U, V, W
present, replace the servo motor.
Check the connection destination of the motor power cable or encoder cable.
Refer to "Connection example of power supply circuit" in the following manual.
MR-J5 User's Manual (Hardware)
Check the noise, ambient temperature, and others, and implement appropriate
countermeasures for the cause.
If there is noise, take countermeasures to reduce the noise.
Refer to "Noise reduction techniques" in the following manual.
MR-J5 User's Manual (Hardware)
Model
[A]
[G]
[WG]
, or ).
Model
[A]
[G]
[WG]
, or ). If a ground fault is