Yaskawa Z1000 AC Drive HVAC User Manual
Page 154
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.
n
b3-17: Speed Search Restart Current Level
Sets the current level at which Speed Estimation is restarted as a percentage of drive rated current to avoid overcurrent and
overvoltage problems since a large current can flow into the drive if the difference between the estimated frequency and the
actual motor speed is too big when performing Speed Estimation.
No.
Name
Setting Range
Default
b3-17
Speed Search Restart Current Level
0 to 200%
150%
n
b3-18: Speed Search Restart Detection Time
Sets the time for which the current must be above the level set in b3-17 before restarting Speed Search.
No.
Name
Setting Range
Default
b3-18
Speed Search Restart Detection Time
0.00 to 1.00 s
0.10 s
n
b3-19: Number of Speed Search Restarts
Sets the number of times the drive should attempt to find the speed and restart the motor. If the number of restart attempts
exceeds the value set to b3-19, the SEr fault will occur and the drive will stop.
No.
Name
Setting Range
Default
b3-19
Number of Speed Search Restarts
0 to 10
3
n
b3-24: Speed Search Method Selection
Sets the Speed Search method.
No.
Parameter Name
Setting Range
Default
b3-24
Speed Search Method Selection
0, 1
0
4.13 Advanced Drive Setup Adjustments
154
YASKAWA ELECTRIC TOEP YAIZ1U 03A YASKAWA AC Drive – Z1000 User Manual