YASKAWA Z1000U Technical Manual page 107

n b3-14: Bi-Directional Speed Search Selection (Speed Estimation Type)
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 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.
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 1: Speed Estimation
Setting 2: Current Detection 2
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 SIEP YAIZ1D 01C Z1000U HVAC MATRIX Drive Bypass Technical Manual
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
Name
Speed Search Method Selection
Name
Speed Search Wait Time
Name
Start Speed Search Select
5.2 b: Application
Setting Range
0, 1
Setting Range
0 to 200%
Setting Range
0.00 to 1.00 s
Setting Range
0 to 10
Setting Range
1, 2
Setting Range
0.0 to 30.0 s
Setting Range
0, 1
Default
1
Default
150%
Default
0.10 s
Default
3
5
Default
2
Default
0.5 s
Default
0
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