Chapter 4 Parameters
4-127
08.07
Baseblock Time for Speed Search (BB)
Unit: second
Settings
0.1 to 5.0 sec
Factory Setting: 0.5
When momentary power loss is detected, the AC motor drive will block its output and then wait
for a specified period of time (determined by Pr.08.07, 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.08.15).
When using a PG card with PG (encoder), speed search will begin at the actual PG (encoder)
feedback speed.
08.08
Current Limit for Speed Search
Unit: %
Settings
30 to 200%
Factory Setting: 150
It limits the drive output current during speed search.
When executing speed search, the V/f curve will be by the setting in the group 01.
The level of speed search will affect the speed synchronization time. The larger setting is set
and the faster it will reach the speed synchronization. But too large setting may cause overload.
When Pr.08.04 is set to 1: When the speed searches downward, the output frequency starts
with the master frequency. The output voltage and output current will be increased from 0.
When the output current reaches Pr.08.08 setting, the output frequency continuous searches
downward. When the output frequency, output voltage and V/f setting frequency are the same,
it will be regarded as the synchronization reached and accelerate to the master frequency by
V/f curve.
When Pr.08.04 is set to 2: When the speed searches upward, it will accelerate by V/f curve.
Output
Frequency
Output
Voltage
08.06
08.05
08.04=1
08.06
08.05
08.04=2
Power
Input
Maximum Allowable
Power Loss Time
Baseblock Time
Speed Search
Speed
Synchronization
Detection
Maximum
Allowable Power
Baseblock Time
08.09
Skip Frequency 1 Upper Limit
Unit: Hz
08.10
Skip Frequency 1 Lower Limit
Unit: Hz
08.11
Skip Frequency 2 Upper Limit
Unit: Hz
08.12
Skip Frequency 2 Lower Limit
Unit: Hz
08.13
Skip Frequency 3 Upper Limit
Unit: Hz
08.14
Skip Frequency 3 Lower Limit
Unit: Hz
Settings
0.00 to 599.00Hz
Factory Setting: 0.00
