YASKAWA SVC User Manual page 519

 Turning OFF Drive Permission
It is normally not necessary to turn OFF Drive Permission. However, if there is a reason to turn
OFF Drive Permission in the application, use the following procedure.
1. Turn OFF the main circuit power supply.
2. The operation command will stop, so the Forward RUN and Reverse RUN commands will
turn OFF.
3. Change the command from Inverter Drive Control to NOP.
4. Turn OFF Drive Permission.
The motor will perform an emergency stop.
Use the following steps to restart operation.
5. Execute an alarm clear operation to clear the device alarm.
6. Turn ON Drive Permission.
7. Turn ON the main circuit power supply.
8. Change the command from NOP to Inverter Drive Control.
9. Start the operation command again.
Command
Inverter Drive Control (= 1)
(OW 08)
Drive Permission
(OW 00 bit D)
Alarm Clear
(OW 00 bit F)
Forward RUN or
Reverse RUN
(OW 10 bit 0 or 1)
Main circuit
power supply
Device Warning
Occurrence
(IW 2C bit 1)
Device Alarm
Occurrence
(IW 2C bit 0)
Inverter Ready
(IL 2A bit 6)
Operation Ready
(IW 00 bit 0)
Command Error
Completed Status
(IW 09 bit 3)
10.3 Precautions for Inverter Operation
NOP (=0)
Change to NOP and then
turn OFF Drive Permission.
Inverter Drive Control (= 1)
Turn ON Drive Permission
during the NOP command.
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