2.3 b: Application
174 YASKAWA TOEPYAIGA5002A GA500 DRIVE PROGRAMMING
Enter the Run command to do Speed Search. The drive completes Speed Search, then starts to operate the motor.
■ b3-02: SpeedSearch Deactivation Current
No.
(Hex.)
Name Description
Default
(Range)
b3-02
(0192)
SpeedSearch Deactivation
Current
Sets the current level that stops Speed Search as a percentage of the drive rated output current.
Usually it is not necessary to change this setting.
Determined by A1-02
(0 - 200%)
If the drive cannot restart the motor, decrease this setting.
■ b3-03: Speed Search Deceleration Time
No.
(Hex.)
Name Description
Default
(Range)
b3-03
(0193)
Speed Search Deceleration
Time
Sets the deceleration time during Speed Search operation. Set the length of time to decelerate from
the maximum output frequency to the minimum output frequency.
2.0 s
(0.1 - 10.0 s)
This is the output frequency deceleration time used by Current Detection Speed Search and by the Current Injection
Method of Speed Estimation Speed Search.
Note:
• When A1-02 = 8 [Control Method Selection = EZOLV], this parameter takes effect only in Expert Mode.
• If the drive detects oL1 [Motor Overload] during Current Detection Speed Search, decrease the value set in b3-03.
■ b3-04: V/f Gain during Speed Search
No.
(Hex.)
Name Description
Default
(Range)
b3-04
(0194)
V/f Gain during Speed
Search
Sets the ratio used to reduce the V/f during searches to reduce the output current during speed
searches.
Determined by o2-04
(10 - 100)
Use this formula to calculate the output voltage during Speed Search:
Output voltage during Speed Search = Configured V/f × b3-04
When the current detection search operates correctly, this configuration is not necessary.
■ b3-05: Speed Search Delay Time
No.
(Hex.)
Name Description
Default
(Range)
b3-05
(0195)
Speed Search Delay Time
Sets the Speed Search delay time to activate a magnetic contactor installed between the drive and
motor.
0.2 s
(0.0 - 100.0 s)
When you use a magnetic contactor between the drive and motor, you must close the contactor before the drive will
do Speed Search. This parameter sets a delay time to activate the magnetic contactor.
■ b3-06: Speed Estimation Current Level 1
No.
(Hex.)
Name Description
Default
(Range)
b3-06
(0196)
Expert
Speed Estimation Current
Level 1
Sets the level of current that flows to the motor during Speed Estimation Speed Search as a
coefficient of the motor rated current. Usually it is not necessary to change this setting.
Determined by o2-04
(0.0 - 2.0)
When the speed estimation value is the minimum output frequency, increase this setting. You can do this when the
motor coasts at a high speed while the drive estimates the speed during Speed Estimation Speed Search. The limit of
the output current during speed search is automatically the drive rated current.
Note:
When the drive cannot accurately estimate the speed after you adjust this parameter, use Current Detection Speed Search.
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