Mitsubishi Electric -MR-CV User Manual page 59

When the magnetic contactor drive output is disabled
■Converter unit
When an alarm occurs on the converter unit, the status becomes servo-off, but the main circuit power supply is not shut off, so
shut off the main circuit power supply using an external sequence. Input the emergency stop signal of the controller to the
operating drive units or servo amplifiers to change all axes to servo-off. After canceling the alarm on the converter unit (if the
alarm is also generated in the drive units or servo amplifiers, then after canceling the alarm on the drive units or servo
amplifiers), the operation is enabled again by turning on the error reset command from the controller.
Converter unit control circuit
power supply
Main circuit power supply
Converter unit alarm
Drive unit (axis the protection
coordination cable is connected)
Control circuit power supply
Drive unit (axis the protection
coordination cable is connected)
Base circuit
Servo-on command
(From the controller)
Drive unit (axis the protection
coordination cable is connected)
Alarm
Reset command
(From the controller)
Drive unit (axis the protection
coordination cable is not
connected) or servo amplifier
Control circuit power supply
Drive unit (axis the protection
coordination cable is not
connected) or servo amplifier
Base circuit
Drive unit (axis the protection
coordination cable is not
connected) or servo amplifier
Alarm
Transition No.
1) in the figure
2) and 3) in the figure
4) in the figure
5) in the figure
2)
ON
OFF
5)
ON
OFF
1)
No alarm Alarm
Alarm occurrence
ON
OFF
ON
OFF
ON
OFF
No alarm
ON
OFF
ON
OFF
ON
OFF
1.5 s
Description
When the drive unit is servo-off, the drive unit does not detect alarms that occur on the converter unit.
To cancel the alarm of the converter unit, cycle the power of the converter unit ( 2)) or turn on the servo-on command ( 3)).
. For details on which alarms can be reset by turning on the servo-on command, refer to the following.
Page 75 CONVERTER UNIT TROUBLESHOOTING
If an alarm occurs in the converter unit in the servo-on status, an alarm also occurs on the drive unit, and the status
becomes servo-off.
If an alarm occurs on the converter unit, input the emergency stop signal of the controller to change all axes to servo-off.
4)
No alarm Alarm
Alarm occurrence
(3 s)
Alarm
5)
No alarm
5.5 Timing chart at alarm occurrence
3)
No alarm
(3 s)
No alarm
5 SIGNALS AND WIRING
5
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