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5.2 b: Application
n
b3-24: Speed Search Method Selection
Sets the Speed Search method used.
No.
b3-24
Setting 0: Current Detection Speed Search
Speed Search begins by calculating the speed of the motor, then accelerates from the estimated speed to the speed
reference. This method of Speed Search is also capable of detecting motor direction.
Setting 1: Speed Estimation Speed Search
Speed Search begins looking for the motor speed from either the frequency reference at the time of power loss, or from
the maximum frequency reference. Here, the drive detects the speed using the current level while Speed Search is
executed.
Setting 3: Synchronous Operation (V/f)
Speed Search detects the motor speed by measuring the residual voltage from the rotating motor and then accelerates or
decelerates back to frequency reference. This method of Speed Search is also capable of detecting motor direction.
Note: For explanations of the Speed Search methods, see
to Speed Estimation Type Speed Search (b3-24 = 1) on page
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
0: Triggered when a Run command is issued (normal).
1: Triggered when an external baseblock is released.
u b4: Delay Timers
The timer function is independent of drive operation and can be used to delay the switching of a digital output triggered
by a digital input signal. An on-delay and off-delay can be separately set. The delay timer can help to get rid of chattering
switch noise from sensors.
To enable the timer function, a multi-function input must be set to "Timer input" (H1-
output must be set to "Timer output" (H2-
n
b4-01, b4-02: Timer Function On-Delay, Off-Delay Time
b4-01 sets the on-delay time for switching the timer output. b4-02 sets the off-delay time for switching the timer output.
No.
b4-01
b4-02
126
Parameter Name
Speed Search Method Selection
Refer to Current Detection Speed Search (b3-24 = 0) on page 121
Name
Speed Search Wait Time
Name
Start Speed Search Select
=12). One timer can be used only.
Name
Timer Function On-Delay Time
Timer Function Off-Delay Time
YASKAWA ELECTRIC SIEP C710616 30B YASKAWA AC Drive T1000A Technical Manual
Setting Range
122.
Setting Range
Setting Range
Setting Range
0, 1, 3
and
0.0 to 30.0 s
0 or 1
=18) and a multi-function
0.0 to 3000.0 s
0.0 to 3000.0 s
Default
0
Refer
Default
0.5 s
Default
1
Default
0.0 s
0.0 s
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