Delta Electronics AC Motor Drive VFD007S23A - Manual (Page 115)

Chapter 5 Parameters|VFD-S Series
5-60 Revision August 2006, SE08, SW V2.61
Following a power failure, the AC drive will start its speed search operation, only if the output
current is greater than the value determined by Pr.8-07. When the output current is less than
that of Pr.8-07, the AC drive output frequency is at a “speed synchronization point”. The drive
will start to accelerate or decelerate back to the operating frequency at which it was running
prior to the power failure.
Output
Frequency
Output
Voltage 08-06
08-05
08-04=d1
08-06
08-05
08-04=d2
Power
Input
Maximum Allowable
Power Loss Time
Baseblock Time
Speed Search
Speed
Synchronization
Detection
Maximum
Allowable Power
Baseblock Time
Speed search starts
with the Master
Frequency
Speed search starts with
Min. Output Frequency
8-08 Skip Frequency 1 Upper Limit Unit: 0.1
8-09 Skip Frequency 1 Lower Limit Unit: 0.1
8-10 Skip Frequency 2 Upper Limit Unit: 0.1
8-11 Skip Frequency 2 Lower Limit Unit: 0.1
8-12 Skip Frequency 3 Upper Limit Unit: 0.1
8-13 Skip Frequency 3 Lower Limit Unit: 0.1
Settings d0.0 to d400Hz Factory Setting: d0.0
These parameters determine Skip frequency. It will cause the AC drive to skip operation at
these frequency ranges with continuous frequency output.
Pr.8-9, Pr.8-11, Pr.8-13 are for Lower Bound setting, and the settings should follow as Pr.8-9
≧Pr.8-11≧Pr.8-13.
8-14 Auto Restart After Fault Unit: 1
Settings d0 to d10 Factory Setting: d0
After fault occurs (allowable faults: over-current OC, over-voltage OV), the AC drive can be
reset/restarted automatically up to 10 times. Setting this parameter to 0 will disable the
reset/restart operation after any fault has occurred. When enabled, the AC drive will restart
with speed search, which starts at the Master Frequency.