YASKAWA SVC - Page 519

10.3 Precautions for Inverter Operation
10-17
10
Inverter Operation
 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.









Main circuit
power supply
Command
(OW08)
Forward RUN or
Reverse RUN
(OW
 10 bit 0 or 1)
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)
Alarm Clear
(OW00 bit F)
Drive Permission
(OW00 bit D)
Inverter Drive Control (= 1)
Inverter Drive Control (= 1)
NOP (=0)
Change to NOP and then
turn OFF Drive Permission.
Turn ON Drive Permission
during the NOP command.