YASKAWA GA700 Technical Manual page 165

Table 3.17 Parameters for Fine Tuning the Drive (Open Loop Vector Control Method)
Issue Parameter Number
n2-01
[SpdFeedbackDetectCtr
(AFR) Gain]
• Torque, speed response
is slow.
• Hunting, oscillation at
middle-range speeds
(10 Hz to 40 Hz)
n2-02
[SpdFeedbackDetCtr
(AFR)TimeConst1]
YASKAWA ELECTRIC SIEP C710617 01B YASKAWA AC Drive GA700 Technical Manual
3.10 Fine Tuning during Test Runs (Adjustment of Control Functionality)
Solution
• To improve the torque,
speed responsiveness,
reduce the setting value
in increments of 0.05.
• If hunting, oscillation
occurs, increase the
setting value in
increments of 0.05.
• To improve the torque,
speed responsiveness,
reduce the value in
increments of 10 ms
while evaluating the
response.
• If hunting, oscillation
occurs, or if load inertia
is excessive, raise the
value in increments of
50 ms while evaluating
the response.
Note:
Always set this so that
n2-02 ≤ n2-03
[SpdFeedbackDetCtr
(AFR)TimeConst2]
holds true.
Whenever n2-02 is
adjusted, the value set
for C4-02 [Torque
Compensation Delay
Time] must also be
increased according to
the same ratio.
Default Setting Suggested Setting
1.00 0.50 - 2.00
50 ms 50 - 2000 ms
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