YASKAWA T1000V Technical Manual page 119

b3-04: V/f Gain During Speed Search
■
In order to lower the output current when performing Speed Search, this parameter determines what percentage the V/f
ratio should be reduced. The output voltage during Speed Search becomes V/f x b3-04.
No.
b3-04
■ 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. For Speed Search after a momentary power loss, parameter b3-05 can be used to delay the
Speed Search start providing enough time to operate the contactor.
When Speed Search at start is used, b3-05 will serve as the lower limit of the minimum baseblock time (L2-03).
No.
b3-05
b3-06: Output Current 1 During Speed Search
■
Sets the current injected to the motor at the beginning of Estimation Type Speed Search as a factor related to motor rated
current set in E2-01 and E4-01. 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. This function has no influence when Current Detection Speed Search is
used (b3-24 = 0).
No.
b3-06
Note: If Speed Estimation is not working correctly even after adjusting b3-06, try using Current Detection Speed Search instead.
b3-10: Speed Search Detection Compensation Gain
■
This parameter sets the gain for the detected motor speed of the Speed Estimation Speed Search. The drive will start the
motor at the estimated speed multiplied by b3-10. The setting should be increased if an overvoltage fault occurs when the
drive restarts the motor. This function has no influence when Current Detection Speed Search is used (b3-24 = 0).
No.
b3-10 Speed Search Detection Compensation Gain
Note: Increase this value if overvoltage occurs when performing Speed Search at start after a relatively long period of baseblock.
b3-14: Bi-Directional Speed Search Selection
■
Sets how the drive determines the motor rotation direction when performing Speed Estimation Speed Search. The setting
has no influence on Current Detection Speed Search (b3-24 = 0).
No.
b3-14
Setting 0: Disabled
The drive uses the frequency reference to determine the direction of motor rotation in order to restart the motor.
Setting 1: Enabled
The drive detects the motor rotation direction in order to restart the motor.
YASKAWA ELECTRIC SIEP C710606 44B YASKAWA AC Drive T1000V Technical Manual
Name
V/f Gain During Speed Search
Name
Speed Search Delay Time
Name
Output Current 1 during Speed Search
Name
Parameter Name
Bi-Directional Speed Search Selection
5.2 b: Application
Setting Range
10 to 100%
Setting Range
0.0 to 100.0 s
Setting Range
Determined by
0.0 to 2.0
o2-04 and C6-01
Setting Range
1.00 to 1.20
Setting Range
0 or 1
Default
100%
Default
0.2 s
Default
Default
1.05
5
Default
0
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