YASKAWA GA700 Technical Manual page 206

3.10 Fine Tuning during Test Runs (Adjust the Control Function)
Table 3.18 Parameters for Fine Tuning the Drive (Open Loop Vector Control Method)
Issue
n2-01
[SpdFeedbackDetectCtr
(AFR) Gain]
• Torque or speed
response are slow.
• Hunting or oscillation
at mid-range speeds (10
Hz to 40 Hz)
n2-02
[SpdFeedbackDetCtr
(AFR)TimeConst1]
206
Parameter Number
• To increase the speed of
torque or speed
response, decrease the
setting value in
increments of 0.05.
• If hunting or oscillation
occur, decrease the
setting value in
increments of 0.05.
• To increase the speed of
torque or speed
response, decrease the
setting value in
increments of 10 ms
and examine the
response.
• If hunting or oscillation
occur or if the load
inertia is too much,
increase the setting
value in increments of
50 ms and examine the
response.
Note:
Make sure that this
parameter setting is:
n2-02 ≤ n2-03
[SpdFeedbackDetCtr
(AFR)TimeConst2]
holds true.
When you adjust n2-
02, you must also
increase theC4-02
[Torque Compensation
Delay Time] value by
the same ratio.
YASKAWA ELECTRIC SIEP C710617 05F YASKAWA AC Drive GA700 Technical Manual
Solution Default Setting
1.00
50 ms
Recommended
Setting
0.50 - 2.00
50 - 2000 ms