Mitsubishi Electric MELSERVO-J3W Series Instruction Manual page 427

15. MR-J3W-0303BN6 SERVO AMPLIFIER
(b) When a corresponding axis stop alarm occurred
ON
Main circuit
power
OFF
Control circuit
ON
Base circuit
OFF
ON
Dynamic brake
OFF
ON
Servo-on command
A-axis
(from controller)
OFF
ON
Alarm
OFF
ON
Reset command
OFF
ON
Base circuit
OFF
ON
Dynamic brake
OFF
ON
Servo-on command
B-axis
(from controller)
OFF
ON
Alarm
OFF
ON
Reset command
OFF
Power on
Note 1. It is different according to the operation status.
2. The dynamic brake does not operate while the control circuit power supply is cut.
(2) Supplementary explanation
(a) Overcurrent/Overload 1/Overload 2
Driving the servo motor by cycling the control circuit power repeatedly to restart without removing the
cause of an occurring alarm of Overcurrent (32. )/Overload 1 (50. )/Overload 2 (51. ) will raise
temperature. Doing so may result in a malfunction of the servo amplifier or servo motor. Remove its
cause and allow about 30 minutes for cooling before resuming the operation.
(b) Regenerative error
Driving the servo motor by cycling the control circuit power repeatedly to restart without removing the
cause of an occurring Regenerative error (30. ) will raise the temperature of regenerative resistor.
Doing so may result in a malfunction of the servo amplifier or servo motor.
(c) Instantaneous power failure
Undervoltage (10. ) occurs on the following conditions.
A power failure occurred for 15 ms at the control circuit power supply and recovered.
Bus voltage dropped to 24VDC, 15VDC/48VDC, 35VDC on the servo-on status.
The brake operates during the time set in Pr. PF12.
Base circuit Base circuit
ON ON (EDB)
Brake operation
Servo-on
command
Occurrence of
No alarm
each axis alarm
Base circuit
ON
Servo-on
command
No alarm
1.5s Fault cause
removed
Occurrence of
Alarm reset
each axis alarm
Power ON
Base circuit
ON
No alarm
Reset operation
Base circuit
ON (EDB)
Brake operation
Occurrence of
each axis alarm
50ms or
more
Fault cause
removed Alarm reset
Occurrence of
all Power shutoff
Power on axis stop alarm
15 - 22
Base circuit
ON (EDB)
Brake operation
Servo-on
command
Occurrence of
all axis stop alarm
Base circuit Base circuit
ON ON (EDB)
Brake operation
Servo-on
command
Occurrence of
No alarm
all axis stop alarm
Reset operation
50ms or
60ms (Note 1)
more
Main circuit power Main circuit power
supply shut-off supply on
(Note 2)
Power ON
Base circuit
ON
No alarm
Base circuit
ON
No alarm