Mitsubishi Electric MELSERVO-J3W Series, Instruction Manual

Page: 143 / 500

8. TROUBLESHOOTING
8 - 4
8.3 Remedies for alarms
CAUTION
When any alarm has occurred, eliminate its cause, ensure safety, then reset the
alarm, and restart operation. Otherwise, injury may occur.
If an absolute position erase (25.1) occurred, always make home position setting
again. Not doing so may cause unexpected operation.
Shut off the main circuit power supply when alarms are occurring in both of the A-
axis and the B-axis. Otherwise, a regenerative transistor fault or the like may
overheat the regenerative resistor, causing a fire.
POINT
When any of the following alarms has occurred, do not deactivate the alarm and
resume operation repeatedly. To do so will cause the servo amplifier/servo motor
to fail. Remove the cause of occurrence, and leave a cooling time of more than 30
minutes before resuming operation. To protect the main circuit elements, any of
these servo alarms cannot be deactivated from the servo system controller until the
specified time elapses after its occurrence. Judging the load changing condition
until the alarm occurs, the servo amplifier calculates this specified time
automatically.
Regenerative error (30. ) Main circuit device overheat (45. )
Servo motor overheat (46. ) Overload 1 (50. )
Overload 2 (51. )
The alarm can be deactivated by switching power off, then on or by the error reset
command CPU reset from the servo system controller. For details, refer to section
8.1.
When an alarm occurs, the malfunction (ALM-A/ALM-B) switches off and the dynamic brake is operated to stop
the servo motor. At this time, the display indicates the alarm No.
The servo motor comes to a stop. Remove the cause of the alarm in accordance with this section. Use the MR
Configurator to refer to a factor of alarm occurrence.