N6: Online Tuning - YASKAWA GA700 Technical Manual

11.10 n: Special Adjustment
7. Set the frequency reference to the same value as the motor rated speed.
8. Measure the time taken by the motor to reach the rated speed.
Display U1-05 [Motor Speed] on the keypad and enter the Run command (forward run).
9. Stop the motor.
10. Set n5-02 to the actual measured motor acceleration time value.
Reset all parameters changed to measure the motor acceleration time to the previous setting values.
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n5-03: Feed Forward Control Gain
No.
Name
(Hex.)
n5-03 Feedforward Control
Gain
(05B2)
Set this parameter in accordance with the following procedure when Inertia Tuning cannot be performed.
Set n5-02 [Motor Acceleration Time] beforehand.
1. Connect the motor and load.
2. Set C1-01 [Acceleration Time 1] = 0.
3. Set the expected test run torque limit levels using parameters L7-01 through L7-04 [Torque Limit].
4. Set the frequency reference in accordance with the high speed range of the machine.
5. Measure the time taken by the motor to reach the command reference speed.
Display U1-05 [Motor Speed] on the keypad and enter the Run command.
6. Stop the motor.
7. Substitute the retrieved values in the following expression, and set n5-03 to the value derived from the
expression.
• t
= Acceleration time (s)
accel
• f = Motor rated frequency (Hz)
rated
• T = Test run torque limit (%)
Lim_Test
• f
= Test run frequency reference (Hz)
ref_Test
Note:
Machinery accelerates suddenly. This should never be carried out with respect to machinery that must not be suddenly accelerated.
Reset all parameters changed to measure the motor acceleration time to the previous setting values.
Note:
• Increase the value set in n5-03 when response to the speed reference is slow.
• Reduce the value set in n5-03 in the following circumstances.
–The actual speed is overshooting.
–A negative torque reference is output when acceleration ends.
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n5-04: Spd Response F
No.
Name
(Hex.)
n5-04 Spd Response F
(05B3)
RUN
If n5-03 [Feed Forward Control Gain] is set incorrectly, the response will worsen beyond the set frequency.
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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.
886
V/f CL-V/f OLV CLV AOLV
This parameter sets the ratio between load inertia and motor inertia. The
Feedforward Control Gain value is automatically set by Inertia Tuning.
V/f CL-V/f OLV CLV AOLV
Sets the response frequency for the speed reference in increments of 0.01
Hz. Normally there is no need to configure this setting.
YASKAWA ELECTRIC SIEP C710617 01B YASKAWA AC Drive GA700 Technical Manual
Description
OLV/PM AOLV/PM CLV/PM EZOLV OLV/PM
Description
OLV/PM AOLV/PM CLV/PM EZOLV OLV/PM
Default
(Range)
1.00
(0.00 - 100.00)
Default Setting
(Range)
Determined by A1-02
(0.00 - 500.00 Hz)