YASKAWA Z1000 Technical Manual page 125

Method 4. After momentary power loss.
This mode requires that the Power Loss Ride-Thru function is enabled during CPU operation (L2-01 = 1 or 2).
Momentary Power Loss Operation Selection on page
Method 5. After external baseblock is released.
The drive will resume the operation starting with Speed Search if the Run command is present and the output frequency is
above the minimum frequency when the Baseblock command (H1-oo = 8 or 9) is released.
n b3-01: Speed Search Selection at Start
Determines if Speed Search is automatically performed when a Run command is issued.
No.
b3-01
Setting 0: Disabled
This setting starts operating the drive at the minimum output frequency when the Run command is entered. If external Speed
Search 1 or 2 is already enabled by a digital input, the drive will start operating with Speed Search.
Setting 1: Enabled
This setting performs Speed Search when the Run command is entered. The drive begins running the motor once Speed Search
is complete.
n b3-02: Speed Search Deactivation Current
Sets the operating current for Speed Search as a percentage of the drive rated current. Normally there is no need to change
this setting. Lower this value if the drive has trouble restarting.
No.
b3-02
n b3-03: Speed Search Deceleration Time
Sets the output frequency reduction ramp used by the Current Injection Method of Speed Estimation (b3-24 = 1). The time
entered into b3-03 will be the time to decelerate from maximum frequency (E1-04) to minimum frequency (E1-09).
No.
b3-03
n b3-04: V/f Gain during Speed Search (Speed Estimation Type)
During Speed Search, the output voltage calculated from the V/f pattern is multiplied with this value. Changing this value can
help reduce the output current during Speed Search.
No.
b3-04
n b3-05: Speed Search Delay Time
In cases where an output contactor is used between the drive and the motor, the contactor must be closed before Speed Search
can be performed. This parameter can be used to delay the Speed Search operation, giving the contactor enough time to close
completely.
No.
b3-05
n b3-06: Output Current 1 during Speed Search (Speed Estimation Type)
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.
YASKAWA ELECTRIC SIEP YAIZ1B 01E YASKAWA AC Drive – Z1000 Bypass Technical Manual
169.
Parameter Name
Speed Search Selection at Start
Name
Speed Search Deactivation Current
Name
Speed Search Deceleration Time
Name
V/f Gain during Speed Search
Name
Speed Search Delay Time
5.2 b: Application
Refer to L2-01:
Setting Range
0, 1
Setting Range
0 to 200%
Setting Range
0.1 to 10.0 s
Setting Range
Determined by
10 to 100%
Setting Range
0.0 to 100.0 s
Default
0
Default
120%
Default
2.0 s
5
Default
o2-04
Default
0.2 s
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