CHAPTER 12: DESCRIPTION OF PARAMETER SETTINGS
63-4528—04 200
• Following a momentary power loss, the VFD will start its speed search operation only if the output current is greater than the
value set by Pr.07-08.
• When executing speed search, the V/f curve is operated by group 1 setting. The maximum current for the optimum accel./
decel. and start speed search is set by Pr.07-08.
• The speed search level will affect the synchronous time. It will get the synchronization faster when this parameter is set to
larger value. But too large value may active overload protection
• Fault includes: bb, oc, ov, occ, etc. To restart after oc, ov, occ, Pr.07-10 cannot be set to 0
• The maximum automatic rest and reboots times for the VFD when faults (oc, ov, occ) occur is up to 10 times. When this
parameter is set to 0, there will be no reset or reboots. When auto reset and reboots are enabled, the VFD perform a speed
search before activate the drive.
• When the number of fault occur exceed Pr.07-10, the drive will refuse to re-start. Please press “RESET” key to continue the
operation
• This parameter is used for starting and stopping a motor with a high inertia. A motor with high inertia will take 2-5 minutes or
longer to stop completely. By setting this parameter, the user does not need to wait for the motor to come to a complete stop
before restarting the VFD. If a PG card and encoder is used on the drive and motor, then the speed search will start from the
speed that is detected by the encoder and accelerate quickly to the commanded frequency. The output current is set by the
Pr.07-08.
a
07 - 08 Current Limit for Speed Search
Factory Setting: 100
Settings 20~200%
a
07 - 09 Treatment to Reboots After Fault
Factory Setting: 0
Settings 0: Stop operation
1: Speed search starts with current speed
2: Speed search starts with minimum output frequency
a
07 - 10 # of Automatic Reboots After Fault
Factory Setting: 0
Settings 0~10
a
07 - 11 Speed Search during Start-up
Factory Setting: 0
Settings 0: Disable
1: Speed search from maximum output frequency
2: Speed search from start-up motor frequency
3: Speed search from minimum output frequency
a
07 - 12 Decel. Time at Momentary Power Loss (dEb function)
Factory Setting: 0
Settings 0: Disable
1: 1st decel. time
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