Mitsubishi Electric -MR-CV User Manual page 54

■Drive unit
When an alarm occurs on the drive unit, the base circuit is shut off, and the servo motor begins to coast. Once the servo motor
begins to coast, the dynamic brake is activated and the servo motor stops. The alarm can be canceled by cycling the control
circuit power supply, turning on the error reset command from the controller, or using the CPU reset command, but it cannot
be canceled unless the cause of the alarm is eliminated.
Converter unit control circuit
power supply
Main circuit power supply
Converter unit alarm
Drive unit
Control circuit power supply
Base circuit
Servo-on command
(From the controller)
Drive unit
Alarm
Reset command
(From the controller)
Transition No.
1) in the figure
5 SIGNALS AND WIRING
52
5.5 Timing chart at alarm occurrence
ON
OFF
ON
OFF
ON
OFF
ON
OFF
ON
OFF
No alarm
1.5 s
ON
OFF
Description
After the drive unit has started up, the main circuit power supply is turned on without alarms for the drive unit and converter
unit.
1)
No alarm
(3 s)
Alarm
Alarm occurrence
1)
(3 s)
No alarm