Parameter Details
2
2.10 n: Special Adjustment
YASKAWA TOEPYAIGA8002B GA800 Drive Programming 509
■ n8-79: Pull-in Current @ Deceleration
No.
(Hex.)
Name Description
Default
(Range)
n8-79
(05FE)
Pull-in Current @
Deceleration
Sets the pull-in current that can flow during deceleration as a percentage of the E5-03 [PM Motor
Rated Current (FLA)].
50%
(0 - 200%)
If overcurrent occurs during deceleration, slowly decrease the setting in 5% increments.
Note:
When n8-79 = 0, the drive will use the value set in n8-51 [Pull-in Current @ Acceleration].
■ n8-84: Polarity Detection Current
No.
(Hex.)
Name Description
Default
(Range)
n8-84
(02D3)
Expert
Polarity Detection Current
Sets the current for processing an estimation of the initial motor magnetic pole as a percentage,
where E5-03 [PM Motor Rated Current] is the 100% value.
100%
(0 - 150%)
WARNING! Sudden Movement Hazard. Make sure that the polarity is correct before you send a Run command. If the drive
incorrectly detects the polarity, the drive can rotate in the direction opposite of the Run command and cause serious injury or death.
If you use a Yaskawa motor and the motor nameplate has an “Si” item, set this parameter to a value equal to or more
than "Si x 2". Consult the motor manufacturer to determine the maximum setting values.
Find the Polarity of Magnetic Poles
At start, the drive estimates the magnetic poles and finds the polarity of the magnetic poles. When A1-02 = 7 [Control
Method Selection = CLV/PM], the drive finds the polarity of the magnetic poles only at the first startup.
Check monitor U6-57 [PolePolarityDeterVal] to make sure that the drive correctly estimated the polarity of the
magnetic poles.
The drive automatically calculates n8-84 when High Frequency Injection Auto-Tuning completes successfully.
■ n8-94: Flux Position Estimation Method
No.
(Hex.)
Name Description
Default
(Range)
n8-94
(012D)
Expert
Flux Position Estimation
Method
Sets the criteria that the drive uses to find changes in speed or load. Usually it is not necessary to
change this setting.
Determined by d5-01
(0, 1)
0 : Softstarter
1 : Speed Feedback
Set n8-57 = 1 [HFI Overlap Selection = Enabled] to enable this parameter. Increases the stability when the speed or
load suddenly change, for example with rapid acceleration/deceleration or impact loads.
■ n8-95: Flux Position Est Filter Time
No.
(Hex.)
Name Description
Default
(Range)
n8-95
(012E)
Expert
Flux Position Est Filter Time
Sets the time constant of the filter used for the recognition criteria value for speed and load changes.
Usually it is not necessary to change this setting.
30 ms
(0 - 100 ms)
Note:
Enabled when n8-94 = 1 [Flux Position Estimation Method = Speed Feedback].
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