YASKAWA A1000 Technical Manual page 165


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.
No.
b3-10

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.
Note: This parameter is available in models CIMR-A4A0930 and 4A1200.
No.
b3-12

b3-14: Bi-Directional Speed Search Selection
Sets how the drive determines the motor rotation direction when performing Speed Estimation Speed Search.
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.

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.
No.
b3-17

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.
No.
b3-18

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.
b3-19

b3-24: Speed Search Method Selection
Sets the Speed Search method used.
No.
b3-24
Setting 0: Current Detection Speed Search
Setting 1: Speed Estimation Speed Search
Note: For explanations of the Speed Search methods,
Speed Estimation Type Speed Search (b3-24 = 1) on page
YASKAWA ELECTRIC SIEP C710616 27G YASKAWA AC Drive A1000 Technical Manual
Name
Speed Search Detection Compensation Gain
Name
Minimum Current Detection Level during Speed Search
Parameter Name
Bi-Directional Speed Search Selection
Name
Speed Search Restart Current Level
Name
Speed Search Restart Detection Time
Name
Number of Speed Search Restarts
Parameter Name
Speed Search Method Selection
Refer to Current Detection Speed Search (b3-24 = 0) on page 160
161.
5.2 b: Application
Setting Range Default
1.00 to 1.20
Setting Range Default
2.0 to 10.0
Setting Range Default
0 or 1 Determined by A1-02
Setting Range Default
0 to 200%
Setting Range Default
0.00 to 1.00 s
Setting Range Default
0 to 10
Setting Range Default
0 or 1
and Refer to
1.05
6.0
150%
0.10 s
5
3
0
165