Parameter Details
11
11.10 n: Special Adjustment
YASKAWA ELECTRIC SIEP C710617 05F YASKAWA AC Drive GA700 Technical Manual 999
10. Set n5-02 to the measured motor acceleration time value.
Reset all of the parameters that you changed to the previous setting values.
■ n5-03: Feed Forward Control Gain
No.
(Hex.)
Name Description
Default
(Range)
n5-03
(05B2)
Feed Forward
Control Gain
Sets the ratio between load inertia and motor inertia. Inertia Tuning
automatically sets the Feedforward Control Gain value.
1.00
(0.00 - 100.00)
When you cannot do Inertia Tuning, use this procedure to set n5-03:
1. Set n5-02 [Motor Inertia Acceleration Time].
2. Connect the motor and load.
3. Set C1-01 [Acceleration Time 1] = 0.
4. Use L7-01 to L7-04 [Torque Limit] to set the expected test run torque limit levels.
5. Set the frequency reference as specified by the high speed range of the machine.
6. Measure the length of time for the motor to reach the command reference speed.
Show U1-05 [Motor Speed] on the keypad and enter the Run command.
7. Stop the motor.
8. Replace the values in the this formula and set n5-03 to the value of the formula.
• t
accel
= Acceleration time (s)
• f
rated
= Motor rated frequency (Hz)
• T
Lim_Test
= Test run torque limit (%)
• f
ref_Test
= Test run frequency reference (Hz)
WARNING! Sudden Movement Hazard. Machinery can accelerate suddenly. Do not use this function with machinery that must
not accelerate suddenly. Failure to obey can cause death or serious injury.
Reset all of the parameters that you changed to the previous setting values.
Note:
• If response to the speed reference is slow, increase the setting value.
• Decrease the setting value in these conditions:
–The speed is overshooting.
–A negative torque reference is output when acceleration ends.
■ n5-04: Speed Response Frequency
No.
(Hex.)
Name Description
Default
(Range)
n5-04
(05B3)
RUN
Expert
Speed Response
Frequency
Sets the response frequency for the speed reference. Usually it is not
necessary to change this setting.
Determined by A1-02
(0.00 - 500.00 Hz)
If you set n5-03 [Feed Forward Control Gain] too high, the motor speed will momentarily increase to more than
the set frequency.
◆ n6: Online Tuning
n6 parameters are used to set the online tuning function for motor line-to-line resistance.
The Online Tuning for motor line-to-line resistance is used to prevent degradation of speed control accuracy due
to motor temperature fluctuation and motor stalls due to insufficient torque.
To Next Page
Loading...
