11.10 n: Special Adjustment
1008 YASKAWA ELECTRIC SIEP C710617 05F YASKAWA AC Drive GA700 Technical Manual
■ n8-75: Medium Load Iq Level (low)
No.
(Hex.)
Name Description
Default
(Range)
n8-75
(05C4)
Expert
Medium Load Iq
Level (low)
Set n8-78 [Medium Load Id Current] to the level of the load current (q-axis
current) to be applied.
50%
(0 - 255%)
Note:
• If n8-74 [Light Load Iq Level] > n8-75, the drive will detect oPE08 [Parameter Selection Error].
• The change is linear between n8-74 and n8-75 and the level of the pull-in current from n8-48 to n8-78 [Medium Load Id Current].
■ n8-77: Heavy Load Iq Level
No.
(Hex.)
Name Description
Default
(Range)
n8-77
(05CE)
Expert
Heavy Load Iq Level
Set n8-49 [Heavy Load Id Current] to the level of the load current (q-axis
current) to be applied.
90%
(0 - 255%)
Note:
The change is linear between n8-75 [Medium Load Iq Level (low)] and n8-77 and the level of the pull-in current from n8-78 [Medium
Load Id Current] to n8-49 [Heavy Load Id Current].
■ n8-78: Medium Load Id Current
No.
(Hex.)
Name Description
Default
(Range)
n8-78
(05F4)
Expert
Medium Load Id
Current
Sets the level of the pull-in current for mid-range loads.
0%
(0 - 255%)
■ n8-79: Pull-in Current @ Deceleration
No.
(Hex.)
Name Description
Default
(Range)
n8-79
(05FE)
Pull-in Current @
Deceleration
Sets, the pull-in current allowed to flow during deceleration as a percentage
of the motor rated current.
0%
(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 that the drive uses to estimate the initial motor magnetic
pole as a percentage where E5-03 [PM Motor Rated Current (FLA)] =
100%.
100%
(0 - 150%)
If you use a Yaskawa motor, and the motor nameplate has an “Si” item, set this parameter to a value equivalent to
Si × 2.
Find the Polarity of Magnetic Poles
When you start operation (only the first time when A1-02 = 7 [Control Method Selection = PM Closed Loop
Vector], the drive estimates the magnetic poles and finds the polarity of the magnetic poles.
Check monitor U6-57 [PolePolarityDeterVal] to make sure that the drive correctly estimated the polarity of the
magnetic poles.
When you do Stationary Auto-Tuning or Rotational Auto-Tuning, the drive automatically sets this parameter.
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