Mitsubishi Electric Melservo-J3 Series MR-J3-B Instruction Manual page 337

13. SERVO AMPLIFIERS WITH A LARGE CAPACITY (30k TO 55kW)
2) Drive unit
When an alarm occurs on the drive unit, the base circuit is shut off and the servo motor coasts. When
using a dynamic brake (option), the dynamic brake is activated to stop the servo motor. To deactivate
the alarm, power the control circuit off, then on, turn the reset (RES) on or CPU reset command.
However, the alarm cannot be deactivated unless its cause is removed.
Converter unit control
power supply
Main circuit
power supply
Converter unit alarm
Drive unit control
power supply
Base circuit
Servo-on command
(from controller)
Drive unit alarm
Reset command
(from controller)
a) in Figure
ON
OFF
ON
OFF
ON
OFF
ON
OFF
ON
OFF
1.5s
ON
OFF
After completing to start the drive unit, the main circuit power is supplied while the
drive unit and the converter unit have no alarms.
a)
(3s)
OFF
Alarm occurrence
13 - 40
a)
OFF
ON
(3s)
OFF
50ms or more