YASKAWA Z1000 Technical Manual page 127

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 (Speed Estimation Type)
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.
b3-17
n b3-18: Speed Search Restart Detection Time (Speed Estimation Type)
Sets the time for which the current must be above the level set in b3-17 before restarting Speed Search.
No.
b3-18
n b3-19: Number of Speed Search Restarts (Speed Estimation Type)
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
n b3-24: Speed Search Method Selection
Sets the Speed Search method.
No.
b3-24
Setting 0: Current Detection
Setting 1: Speed Estimation
Note: Refer to Current Detection Speed Search (b3-24 = 0) on page 122
page 123 for explanations of the Speed Search methods.
n b3-25: Speed Search Wait Time
Sets the wait time between Speed Search restarts. Increase the wait time if problems occur with overcurrent, overvoltage, or
if the SEr fault occurs.
No.
b3-25
n b3-27: Start Speed Search Select
Selects a condition to activate Speed Search Selection at Start (b3-01) or External Speed Search Command 1 or 2 from the
multi-function input.
No.
b3-27
YASKAWA ELECTRIC SIEP YAIZ1B 01E YASKAWA AC Drive – Z1000 Bypass Technical Manual
Name
Speed Search Restart Current Level
Name
Speed Search Restart Detection Time
Name
Number of Speed Search Restarts
Parameter Name
Speed Search Method Selection
Name
Speed Search Wait Time
Name
Start Speed Search Select
Setting Range
0 to 200%
Setting Range
0.00 to 1.00 s
Setting Range
0 to 10
Setting Range
0, 1
and Refer to Speed Estimation Type Speed Search (b3-24 = 1) on
Setting Range
0.0 to 30.0 s
Setting Range
0, 1
5.2 b: Application
Default
110%
Default
0.10 s
Default
3
Default
0
5
Default
0.5 s
Default
0
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