YASKAWA Z1000U Technical Manual page 105

Setting Description
External Search
61
Command 1
External Search
62
Command 2
To activate Speed Search by a digital input, the input must be set together with the Run command or the Run command must
be entered after giving the Speed Search command.
Method 3. After automatic fault restart.
When the number of maximum fault restarts in parameter L5-01 is set higher than 0, the drive will automatically perform
Speed Search as specified by b3-24 following a fault.
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 b3-03: 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
YASKAWA SIEP YAIZ1D 01C Z1000U HVAC MATRIX Drive Bypass Technical Manual
Table 5.1 Speed Search Activation by Digital Inputs
Closed: Activate Current Detection Speed Search from the
maximum output frequency.
Closed: Activate Current Detection Speed Search from the
frequency reference.
151.
Parameter Name
Speed Search Selection at Start
Name
Speed Search Deceleration Time
Name
V/f Gain during Speed Search
Name
Speed Search Delay Time
b3-24 = 0
Setting Range
0, 1
Setting Range
0.1 to 10.0 s
Setting Range
10 to 100%
Setting Range
0.0 to 100.0 s
5.2 b: Application
b3-24 = 1
Activate Speed Estimation
Speed Search
Refer to L2-01:
Default
0
Default
2.0 s
Default
Determined by
o2-04
Default
0.2 s
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