YASKAWA GA700 Technical Manual page 166

3.10 Fine Tuning during Test Runs (Adjustment of Control Functionality)
Issue
n2-03 SpdFeedbackDetCtr
(AFR)TimeConst2
ov [overvoltage] occurs at
the completion of
acceleration, the
beginning of deceleration,
or when the load changes
radically.
C4-06 [Motor 2 Torque
Comp Delay Time]
• Torque, speed response
C4-02 [Torque
is slow.
Compensation Delay
Time]
• Hunting, oscillation
C3-02 [Slip
• Speed response is slow.
Compensation Delay
• Speed is not stable.
Time]
166
Parameter Number
• When ov occurs, raise
the value in increments
of 50 ms while
evaluating the response.
• If the response is
deficient, reduce the
value in increments of
10 ms while evaluating
the response.
Note:
Always set this so that
n2-02
[SpdFeedbackDetCtr
(AFR)TimeConst1] ≤
n2-03 holds true.
Whenever n2-03 is
adjusted, the value set
for C4-06 [Motor 2
Torque Comp Delay
Time] must also be
increased according to
the same ratio.
• When ov occurs, raise
the value in increments
of 10 ms while
evaluating the response.
• If the response is
deficient, reduce the
value in increments of 2
ms while evaluating the
response.
Note:
Always set this so that
C4-02 [Torque
Compensation Delay
Time] ≤ C4-06.
Whenever C4-06 is
adjusted, the value set
for n2-03
[SpdFeedbackDetCtr
(AFR)TimeConst2]
must also be increased
according to the same
ratio.
• Reduce setting value in
increments of 2 ms
when torque, speed
response is slow.
• If hunting, oscillation
occurs, increase the
setting value in
increments of 10 ms.
Note:
Always set this so that
C4-02 ≤ C4-06 [Motor
2 Torque Comp Delay
Time].
Whenever C4-02 is
adjusted, the value set
for n2-02
[SpdFeedbackDetCtr
(AFR)TimeConst1]
must also be increased
according to the same
ratio.
• Reduce setting value in
increments of 10 ms
when speed response is
slow.
• Increase setting value in
increments of 10 ms if
speed is not stable.
YASKAWA ELECTRIC SIEP C710617 01B YASKAWA AC Drive GA700 Technical Manual
Solution Default Setting
750 ms
150 ms
20 ms
*1
200 ms
*1
Suggested Setting
750 - 2000 ms
150 - 750 ms
20 - 100 ms
*1
100 - 500 ms