YASKAWA T1000A - Page 125

5.2 b: Application
YASKAWA ELECTRIC SIEP C710616 30B YASKAWA AC Drive T1000A Technical Manual 125
Parameter Details
5
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.
Note: If Speed Estimation is not working correctly even after adjusting b3-06, try using Current Detection Speed Search instead.
n b3-10: Speed Search Detection Compensation Gain
This parameter sets the gain for the detected motor speed of the Speed Estimation Speed Search. The setting should be
increased only if an overvoltage fault occurs when the drive restarts the motor.
n
b3-14: Bi-Directional Speed Search Selection
Sets how the drive determines the motor rotation direction when performing Speed Estimation Speed Search.
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.
n
b3-17: Speed Search Restart Current Level
A large current can flow into the drive if there is a fairly large difference between the estimated frequency and the actual
motor speed when performing Speed Estimation. This parameter sets the current level at which Speed Estimation is
restarted, thus avoiding overcurrent and overvoltage problems. Set as a percentage of the drive rated current.
n
b3-18: Speed Search Restart Detection Time
Sets the time that the current must be greater than the level set in b3-17 before Speed Search can be restarted.
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
b3-06 Output Current 1 during Speed Search 0.0 to 2.0 Determined by o2-04
No. Name Setting Range Default
b3-10 Speed Search Detection Compensation Gain 1.00 to 1.20 1.05
No. Parameter Name Setting Range Default
b3-14 Bi-Directional Speed Search Selection 0 or 1 Determined by A1-02
No. Name Setting Range Default
b3-17 Speed Search Restart Current Level 0 to 200% 150%
No. Name Setting Range Default
b3-18 Speed Search Restart Detection Time 0.00 to 1.00 s 0.10 s
No. Name Setting Range Default
b3-19 Number of Speed Search Restarts 0 to 10 3