Chapter 5 Parameters_VFD-B Series
Revision 10/2005, BE13, SW V4.08 5-85
When momentary power loss is detected, the AC drive will block its output and then wait for a specified
period of time (determined by Pr.08-06, called Base-Block Time) before resuming operation. This
parameter should be set at a value to ensure that any residual regeneration voltage from the motor on the
output has disappeared before the drive is activated again.
This parameter also determines the waiting time before resuming operation after External Baseblock and
Auto Restart after Fault (Pr.08-14).
When using a PG card with PG (encoder), speed search will begin at the actual PG (encoder) feedback
speed and settings 01 and 02 will be invalid.
08 - 07
Current Limit for Speed Search Unit: 1
Settings 30 to 200% Factory Setting: 150
Following a momentary power loss, the AC motor drive will start its speed search operation only if the
output current is greater than the value set by Pr.8-07. When the output current is less than the value of
Pr.8-07, the AC motor drive output frequency is at “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 loss.
Output
Frequency
Output
Voltage
08-06
08-05
08-04=01
08-06
08-0 5
08-04=02
Power
Input
Maximum Allowable
Power Loss Time
Baseblock Time
Speed Search
Speed
Synchronization
Detection
Maximum
Allowable Power
Baseblock Time
08 - 08
Skip Frequency 1 Upper Limit Unit: 0.01
08 - 09
Skip Frequency 1 Lower Limit Unit: 0.01
08 - 10
Skip Frequency 2 Upper Limit Unit: 0.01
08 - 11
Skip Frequency 2 Lower Limit Unit: 0.01
08 - 12
Skip Frequency 3 Upper Limit Unit: 0.01
08 - 13
Skip Frequency 3 Lower Limit Unit: 0.01
Settings 0.00 to 400.00Hz Factory Setting: 0.00
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