Yaskawa Z1000U HVAC Matrix Bypass - Manual (Page 138)

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 b3-07: Output Current 2 during Speed Search (Speed Estimation Type)
Sets the amount of output current during Speed Estimation Speed Search as a coefficient for the no-load current (output current
during Speed Search is automatically limited by the drive rated current).
Increase this setting value in increments of 0.1 if the drive fails to perform Speed Estimation.
No. Name Setting Range Default
b3-07 Output Current 2 during Speed Search (Speed Estimation Type) 0.0 to 5.0 1.0
n b3-08: Current Control Gain during Speed Search (Speed Estimation Type)
Sets the proportional gain for the current controller during Speed Search.
No. Name Setting Range Default
b3-08 Current Control Gain during Speed Search (Speed Estimation Type) 0.00 to 6.00
Determined by
o2-04
n b3-09: Current Control Integral Time during Speed Search (Speed Estimation Type)
Sets the Integral Time for the current controller during Speed Search.
No. Name Setting Range Default
b3-09
Current Control Integral Time during Speed Search (Speed
Estimation Type)
0.0 to 1000.0 ms 2.0 ms
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 b3-11: Speed Search Method Switching Level (Speed Estimation Type)
Within the type of the speed measurement, the search method can be switched automatically by the amount of remaining
voltage in the motor. This parameter sets the switching level. (208 Vac at 100% = 208 V, and 480 Vac at 100% = 480 V).
No. Name Setting Range Default
b3-11 Speed Search Method Switching Level (Speed Estimation Type) 0.5 to 100.0% 5.0%
n b3-12: Minimum Current Detection Level during Speed Search
Sets the minimum current detection level during Speed Search. Increase this setting value in increments of 0.1 if the drive
fails to perform Speed Estimation.
No. Name Setting Range Default
b3-12 Minimum Current Detection Level during Speed Search 2.0 to 10.0
Determined by
o2-04
5.2 b: Application
138 YASKAWA SIEP YAIZ1D 01A Z1000U HVAC MATRIX Drive Bypass Technical Manual