12.10 n: Special Adjustment
1024 YASKAWA SIEPC71061737D GA800 Drive Technical Reference
Note:
• For settings 1 and 2, the adjustment time can cause a delay before startup.
• For settings 1 and 2, the drive can set the line-to-line resistance value of E9-10 [Motor Line-to-Line Resistance].
• When the temperature will change at startup, use setting 2.
• To decrease the startup time, set this parameter to 0, then do line-to-line resistance tuning.
• If you will start from coasting, set this parameter to 0, then do line-to-line resistance tuning.
◆ n8: PM Motor Control Tuning
n8 parameters are used to make adjustments when controlling PM motors.
■ n8-01: Pole Position Detection Current
No.
(Hex.)
Name Description
Default
(Range)
n8-01
(0540)
Pole Position Detection
Current
Sets the Initial Rotor Position Estimated Current as a percentage where E5-03 [PM Motor Rated
Current (FLA)] = 100%. Usually it is not necessary to change this setting.
50%
(0 - 100%)
The drive uses the Initial Rotor Position Estimated Current to detect the initial position of rotors.
Use the "Si" value on the motor nameplate, if available.
Note:
When A1-02 = 7 [CLV/PM], this parameter takes effect only in Expert Mode.
■ n8-02: Pole Alignment Current Level
No.
(Hex.)
Name Description
Default
(Range)
n8-02
(0541)
Expert
Pole Alignment Current
Level
Sets the current at the time of polar attraction as a percentage where E5-03 [PM Motor Rated Current
(FLA)] = 100%. Usually it is not necessary to change this setting.
80%
(0 - 150%)
The drive uses the polar pull-in current to attract the rotor after it detects the initial rotor position. When you increase
the value of n8-02, the starting torque also increases.
• If the motor does not track correctly at the time of the polar attraction, increase the value in 10% increments. If you
set the value too high, the drive will detect oL2 [Drive Overload].
• If the motor oscillates at the time of the polar attraction, decrease the value in 10% increments.
Note:
• When A1-02 = 7 [Control Method Selection = CLV/PM], do Rotational Auto-Tuning or Z Pulse Offset Tuning to enable this function.
• When A1-02 = 7, this parameter takes effect only in Expert Mode.
■ n8-03: Pole Position Detection Time
No.
(Hex.)
Name Description
Default
(Range)
n8-03
(0542)
Pole Position Detection
Time
Sets the length of the Current Starting Time, which is used for Z Pulse Offset Tuning. Usually it is
not necessary to change this setting.
1.5 s
(1.5 - 5.0 s)
Sets the length of time of pull-in current when the drive detects the motor magnetic pole of the rotors.
Note:
If the motor oscillates at the time of the polar attraction, increase the value in 0.5 s increments. If the value is too high, the drive can detect
oL2 [Drive Overload].
■ n8-04: Pole Alignment Time
No.
(Hex.)
Name Description
Default
(Range)
n8-04
(0543)
Expert
Pole Alignment Time
Sets the length of the Polar Attraction Time, which is used for Z Pulse Offset Tuning. Usually it is
not necessary to change this setting.
1.5 s
(1.5 - 5.0 s)
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