5 SIGNALS AND WIRING
5.5 Timing chart at alarm occurrence
53
5
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. After canceling the alarm on the converter unit (if the alarm
is also on the drive unit, then after canceling the alarm on the drive unit), the operation is enabled again by turning on the error
reset command from the controller.
Transition No.
Description
1) in the figure
When the drive unit is servo-off, the drive unit does not detect alarms that occur on the converter unit.
2) and 3) in the figure
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
4) in the figure
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.
5) in the figure
Use an external sequence to shut off the main circuit power supply the same time that an alarm occurs.
2)
5)
ON
OFF
ON
OFF
ON
OFF
ON
OFF
ON
OFF
(3 s)
1)
ON
OFF
1.5 s
(3 s)
4)
3)
Drive unit
Control circuit power supply
Main circuit power supply
Servo-on command
(From the controller)
Drive unit
Alarm
Base circuit
Reset command
(From the controller)
No alarm
Alarm
No alarm
No alarm
No alarm
Alarm
No alarm
Alarm occurrence
Alarm
Alarm occurrence
Converter unit control circuit
power supply
Converter unit alarm
