When Connecting Multiple Drive Units And Servo Amplifiers To The Converter Unit - Mitsubishi Electric -MR-CV User Manual

When connecting multiple drive units and servo amplifiers to the
converter unit
When the magnetic contactor drive output is enabled
■Converter unit
When an alarm occurs on the converter unit, the magnetic contactor turns off and the main circuit power supply is shut off.
Input the emergency stop signal of the controller to the operating drive units or servo amplifiers to change all axes to servo-off.
The alarm can be canceled by cycling the control circuit power supply or by requesting operation from the axis connected by
the protection coordination cable, 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 (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
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 on the converter unit while the drive unit is servo-on, an alarm also occurs on the axis connected by the
protection coordination cable, 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
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