YASKAWA GA700 - Page 207

Startup Procedure and Test Run
3
3.10 Fine Tuning during Test Runs (Adjust the Control Function)
YASKAWA ELECTRIC SIEP C710617 05F YASKAWA AC Drive GA700 Technical Manual 207
Issue Parameter Number Solution Default Setting Recommended
Setting
ov [overvoltage] occurs
when the drive stops
accelerating, starts to
decelerate, or when there
are large changes in the
load.
n2-03
[SpdFeedbackDetCtr
(AFR)TimeConst2]
• If ov occurs, increase
the setting value in
increments of 50 ms
and examine the
response.
• If the response is not
sufficient, decrease the
setting value in
increments of 10 ms
and examine the
response.
Note:
Make sure that this
parameter setting is:
n2-02
[SpdFeedbackDetCtr
(AFR)TimeConst1] ≤
n2-03. When you
adjust n2-03 you must
also increase the C4-06
[Motor 2 Torque Comp
Delay Time] value by
the same ratio.
750 ms 750 - 2000 ms
C4-06 [Motor 2 Torque
Comp Delay Time]
• If ov occurs, increase
the setting value in
increments of 10 ms
and examine the
response.
• If the response is not
sufficient, decrease the
setting value in
increments of 2 ms and
examine the response.
Note:
Make sure that this
parameter setting is:
C4-02 [Torque
Compensation Delay
Time] ≤ C4-06.
When you adjust C4-
06, you must also
increase then2-03
[SpdFeedbackDetCtr
(AFR)TimeConst2]
value by the same
ratio.
150 ms 150 - 750 ms
• Torque or speed
response are slow.
• Hunting or oscillation
C4-02 [Torque
Compensation Delay
Time]
• If torque or speed
response are slow,
decrease the setting
value in increments of 2
ms.
• If hunting or oscillation
occur, increase the
setting value in
increments of 10 ms.
Note:
Make sure that this
parameter setting is:
C4-02 ≤ C4-06 [Motor
2 Torque Comp Delay
Time].
When you adjust C4-
02, you must also
increase the n2-02
[SpdFeedbackDetCtr
(AFR)TimeConst1]
value by the same
ratio.
20 ms
*1
20 - 100 ms
*1