Parameter Details
11
11.3 b: Application
YASKAWA ELECTRIC SIEP C710617 05F YASKAWA AC Drive GA700 Technical Manual 717
■ b3-04: V/f Gain during Speed Search
No.
(Hex.)
Name Description
Default
(Range)
b3-04
(0194)
V/f Gain during
Speed Search
Sets the ratio used to reduce the V/f during searches to reduce the output
current during speed searches.
Determined by o2-04
(10 - 100)
Use the this formula to calculate the output voltage during Speed Search:
Output voltage during Speed Search = Configured V/f × b3-04
When the current detection search operates correctly, this configuration is not necessary.
■ b3-05: Speed Search Delay Time
No.
(Hex.)
Name Description
Default
(Range)
b3-05
(0195)
Speed Search Delay
Time
Sets the Speed Search delay time to activate a magnetic contactor installed
between the drive and motor.
0.2 s
(0.0 - 100.0 s)
When you use a magnetic contactor between the drive and motor, you must close the contactor before the drive
will do Speed Search. This parameter sets a delay time to activate the magnetic contactor.
■ b3-06: Speed Estimation Current Level 1
No.
(Hex.)
Name Description
Default
(Range)
b3-06
(0196)
Expert
Speed Estimation
Current Level 1
Sets the level of current that flows to the motor during Speed Estimation
Speed Search as a coefficient of the motor rated current. Usually it is not
necessary to change this setting.
Determined by o2-04
(0.0 - 2.0)
When the speed estimation value is the minimum output frequency, increase this setting. You can do this when the
motor coasts at a high speed while the drive estimates the speed during Speed Estimation Speed Search. The limit
of the output current during speed search is automatically the drive rated current.
Note:
When the drive cannot accurately estimate the speed after you adjust this parameter, use Current Detection Speed Search.
■ b3-07: Speed Estimation Current Level 2
No.
(Hex.)
Name Description
Default
(Range)
b3-07
(0197)
Expert
Speed Estimation
Current Level 2
Sets the level of current that flows to the motor during Speed Estimation
Speed Search as a coefficient of E2-03 [Motor No-Load Current] or E4-03
[Motor 2 Rated No-Load Current]. Usually it is not necessary to change this
setting.
1.0
(0.0 - 3.0)
During Speed Estimation Speed Searches, when the speed estimation value aligns with the minimum output
frequency, increase the setting value in 0.1-unit increments. The limit of the output current during speed search is
automatically the drive rated current.
■ b3-08: Speed Estimation ACR P Gain
No.
(Hex.)
Name Description
Default
(Range)
b3-08
(0198)
Expert
Speed Estimation
ACR P Gain
Sets the proportional gain for the automatic current regulator during Speed
Estimation Speed Search. Also adjusts speed search responsiveness. Usually
it is not necessary to change this setting.
A1-02 = 0 through 4:
Determined by o2-04
, A1-02 = 5, 6, or 8:
Determined by A1-02
(0.00 - 6.00)
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