YASKAWA GA700 Series Technical Manual page 661

1 : Enabled
Enter the Run command to do Speed Search. The drive completes Speed Search, then starts to operate the motor.
Note:
If you set b3-01 = 1 when b3-24 = 2 [Speed Search Method Selection = Current Detection 2], too much current flows at start. Too
much current at start will decrease the service life of the drive IGBT.
■
b3-02: SpeedSearch Deactivation Current
No.
Name
(Hex.)
b3-02 SpeedSearch Deactivation
Current
(0192)
If the drive cannot restart the motor, decrease this setting.
■
b3-03: Speed Search Deceleration Time
No.
Name
(Hex.)
b3-03 Speed Search Deceleration
Time
(0193)
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.
Name
(Hex.)
b3-04 V/f Gain during Speed
Search
(0194)
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.
Name
(Hex.)
b3-05 Speed Search Delay Time
(0195)
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.
Name
(Hex.)
b3-06 Speed Estimation Current
Level 1
(0196)
Expert
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.
YASKAWA SIEPC71061705H GA700 Series Technical Manual
V/f CL-V/f OLV CLV AOLV
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.
V/f CL-V/f OLV CLV AOLV
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.
V/f CL-V/f OLV CLV AOLV
Sets the ratio used to reduce the V/f during searches to reduce the output current during speed
searches.
V/f CL-V/f OLV CLV AOLV
Sets the Speed Search delay time to activate a magnetic contactor installed between the drive and
motor.
V/f CL-V/f OLV CLV AOLV
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.
Description
OLV/PM AOLV/PM CLV/PM EZOLV OLV/PM
Description
OLV/PM AOLV/PM CLV/PM EZOLV OLV/PM
Description
OLV/PM AOLV/PM CLV/PM EZOLV OLV/PM
Description
OLV/PM AOLV/PM CLV/PM EZOLV OLV/PM
Description
OLV/PM AOLV/PM CLV/PM EZOLV OLV/PM
12.3 b: Application
Default
(Range)
Determined by A1-02
(0 - 200%)
Default
(Range)
2.0 s
(0.1 - 10.0 s)
Default
(Range)
Determined by o2-04
(10 - 100)
Default
(Range)
0.2 s
(0.0 - 100.0 s)
Default
(Range)
Determined by o2-04
(0.0 - 2.0)
12
661