Yaskawa Z1000U - Manual (Page 147)

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. Name Setting Range Default
b3-03 Speed Search Deceleration Time 0.1 to 10.0 s 2.0 s
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. Name Setting Range Default
b3-04 V/f Gain during Speed Search 10 to 100%
Determined by
o2-04
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. Name Setting Range Default
b3-05 Speed Search Delay Time 0.0 to 100.0 s 0.2 s
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. 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. Name Setting Range Default
b3-06 Output Current 1 during Speed Search 0.0 to 2.0
Determined by
o2-04
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. Name Setting Range Default
b3-10 Speed Search Detection Compensation Gain 1.00 to 1.20 1.05
n b3-14: Bi-Directional Speed Search Selection
Sets how the drive determines the motor rotation direction when performing Speed Estimation Speed Search.
No. Parameter Name Setting Range Default
b3-14 Bi-Directional Speed Search Selection 0, 1 1
Setting 0: Disabled
The drive uses the frequency reference to determine the direction of motor rotation to restart the motor.
Setting 1: Enabled
The drive detects the motor rotation direction to restart the motor.
4.12 Advanced Drive Setup Adjustments
YASKAWA ELECTRIC TOEP C710636 10B Z1000U HVAC MATRIX Drive User Manual 147
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Start-Up Programming & Operation