YASKAWA AC Drive-A1000 Technical Manual page 139

n b3-02: Speed Search Deactivation Current
Sets the operating current for Speed Search as a percentage of the drive rated current. Normally there is no need to change
this setting. Lower this value if the drive has trouble restarting.
No.
b3-02
Note: When parameter A1-02 = 0 (V/f Control) the factory default setting is 120. When parameter A1-02 = 2 (Open Loop Vector) the factory default
setting is 100.
n b3-03: Speed Search Deceleration Time
Sets the output frequency reduction ramp used by Current Detection Speed Search (b3-24 = 0) and by the Current Injection
Method of Speed Estimation (b3-24 = 1). The time entered into b3-03 will be the time to decelerate from maximum frequency
(E1-04) to minimum frequency (E1-09).
No.
b3-03
n
b3-04: V/f Gain During Speed Search
During Speed Search, the output voltage calculated from the V/f pattern is multiplied with this value. Changing this value can
help reduce the output current during Speed Search.
No.
b3-04
n b3-05: Speed Search Delay Time
In cases where an output contactor is used between the drive and the motor, the contactor must be closed before Speed Search
can be performed. This parameter can be used to delay the Speed Search operation, giving the contactor enough time to close
completely.
No.
b3-05
n b3-06: Output Current 1 During Speed Search
Sets the current injected to the motor at the beginning of Speed Estimation Speed Search as a factor of the motor rated current
set in E2-01 (E4-01 for motor 2). If the motor speed is relatively slow when the drive starts to perform Speed Search after a
long period of baseblock, it may be helpful to increase the setting value. The output current during Speed Search is automatically
limited by the drive rated current.
No.
b3-06
Note: Use Current Detection Speed Search if Speed Estimation is not working correctly even after adjusting b3-06.
n b3-10: Speed Search Detection Compensation Gain
Sets the gain for the detected motor speed of the Speed Estimation Speed Search. Increase the setting only if an overvoltage
fault occurs when the drive restarts the motor.
No.
b3-10
n b3-14: Bi-Directional Speed Search Selection
Sets how the drive determines the motor rotation direction when performing Speed Estimation Speed Search.
No.
b3-14
YASKAWA ELECTRIC SIEP C710616 31B YASKAWA AC Drive – A1000 Technical Manual
Name
Speed Search Deactivation Current
Name
Speed Search Deceleration Time
Name
V/f Gain During Speed Search
Name
Speed Search Delay Time
Name
Output Current 1 during Speed Search
Name
Speed Search Detection Compensation Gain
Parameter Name
Bi-Directional Speed Search Selection
5.2 b: Application
Setting Range
Determined by
0 to 200%
Setting Range
0.1 to 10.0 s
Setting Range
Determined by
10 to 100%
Setting Range
0.0 to 100.0 s
Setting Range
Determined by
0.0 to 2.0
Setting Range
1.00 to 1.20
Setting Range
Determined by
0, 1
Default
A1-02
Default
2.0 s
Default
o2-04
Default
0.2 s
Default
5
o2-04
Default
1.05
Default
A1-02
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