11.3 b: Application
718 YASKAWA ELECTRIC SIEP C710617 05F YASKAWA AC Drive GA700 Technical Manual
■ b3-09: Speed Estimation ACR I Time
No.
(Hex.)
Name Description
Default
(Range)
b3-09
(0199)
Expert
Speed Estimation
ACR I Time
Sets the integral time for the automatic current regulator during Speed
Estimation Speed Search. Also adjusts speed search responsiveness. Usually
it is not necessary to change this setting.
Determined by A1-02
(0.0 - 1000.0 ms)
■ b3-10: Speed Estimation Detection Gain
No.
(Hex.)
Name Description
Default
(Range)
b3-10
(019A)
Expert
Speed Estimation
Detection Gain
Sets the gain to correct estimated frequencies from Speed Estimation Speed
Search.
1.05
(1.00 - 1.20)
If the drive detects ov [DC Bus Overvoltage] when you restart the motor, increase the setting value.
■ b3-14: Bi-directional Speed Search
No.
(Hex.)
Name Description
Default
(Range)
b3-14
(019E)
Bi-directional Speed
Search
Sets the direction of Speed Search to the direction of the frequency
reference or in the motor rotation direction as detected by the drive.
Determined by A1-02
(0, 1)
0 : Disabled
The drive uses the frequency reference to detect the direction of motor rotation.
1 : Enabled
The drive detects the direction of motor rotation during Speed Search.
■ b3-17: Speed Est Retry Current Level
No.
(Hex.)
Name Description
Default
(Range)
b3-17
(01F0)
Expert
Speed Est Retry
Current Level
Sets the current level for the search retry function in Speed Estimation
Speed Search as a percentage where drive rated current is a setting value of
100%.
150%
(0 - 200%)
When a large quantity of current flows during Speed Estimation Speed Search, the drive temporarily stops
operation to prevent overvoltage and overcurrent. When the current is at the level set in b3-17, the drive tries
speed search again.
■ b3-18: Speed Est Retry Detection Time
No.
(Hex.)
Name Description
Default
(Range)
b3-18
(01F1)
Expert
Speed Est Retry
Detection Time
Sets the length of time that the drive will wait to retry Speed Estimation
Speed Search when too much current flow stopped the Speed Search.
0.10 s
(0.00 - 1.00 s)
When the current is more than the level set in b3-17 [Speed Est Retry Current Level] during the time set in b3-18,
the drive tries speed search again.
■ b3-19: Speed Search Restart Attempts
No.
(Hex.)
Name Description
Default
(Range)
b3-19
(01F2)
Speed Search Restart
Attempts
Sets the number of times to restart Speed Search if Speed Search does not
complete.
3 times
(0 - 10 times)
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