12.9 n: SPECIAL
818 SIEPYEUOQ2A01G AC Drive Q2A Technical Manual
■ n7-11 DrvModeSwitchHysteresis Band
No.
(Hex.)
Name Description
Default
(Range)
n7-11
(311B)
Expert
DrvModeSwitchHysteresis
Band
Usually it is not necessary to change this setting. Sets the hysteresis level for Switching Speed set
in n7-10 [Pull-in Current Switching Speed].
5.0%
(1.0 - 20.0%)
When the speed is lower than n7-10 + n7-11 during acceleration, the drive enables pull-in current.
Note:
• When the drive accelerates, it enables these settings:
–Motor speed ≤ n7-10 + n7-11: n8-51 [Ac/Dec Pull-In Current]
–Motor speed > n7-10 + n7-11: b8-01 [eSave Ctrl Selection]
• If there is a large quantity of oscillation when you operate in the low speed range, increase the setting value.
• When it is most important to save energy in the low speed range, decrease the setting value.
■ n7-13 DrvMethSwitchTime
No.
(Hex.)
Name Description
Default
(Range)
n7-13
(311D)
Expert
DrvMethSwitchTime
Sets a time to enable the pull-in current commands.
100 ms
(0 - 1000 ms)
If the motor oscillates near the speed set in n7-10 [Pull-in SwitchSpeed], decrease the setting value by 20 ms.
■ n7-17 Resist.Temp.Compensation
No.
(Hex.)
Name Description
Default
(Range)
n7-17
(3122)
Resist.Temp.Compensation
Sets the function to adjust for changes in the motor resistance value caused by changes in the
temperature.
2
(1 - 3)
1 : Invalid
2 : Valid (1 Time)
3 : Valid (Every Time)
Note:
• For settings 2 and 3, the adjustment time can cause a delay before startup.
• For settings 2 and 3, the drive can set the line-to-line resistance value of E9-10 [Motor L-L Resistance].
• When the temperature will change at startup, use setting 3.
• To decrease the startup time, set this parameter to 1, then do line-to-line resistance tuning.
• If you will start from coasting, set this parameter to 1, 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 PolPos Detection Current
No.
(Hex.)
Name Description
Default
(Range)
n8-01
(0540)
Expert
PolPos Detection Current
Sets the Initial Rotor Position Estimated Current as a percentage where E5-03 [PM Mot 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.
If the motor nameplate has an “Si” item, use that value.
■ n8-02 Pole Align Current Level
No.
(Hex.)
Name Description
Default
(Range)
n8-02
(0541)
Expert
Pole Align Current Level
Sets the current at the time of polar attraction as a percentage where motor rated current = 100%.
Usually it is not necessary to change this setting.
80%
(0 - 150%)
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