IMPULSE•G+/VG+ Series 4 Technical Manual
November 2022
Page 122
5.3.7 S-Curve Acceleration/Deceleration
An S-Curve pattern is used to reduce shock and provide smooth transitions during machine acceleration and
deceleration. S-Curve characteristic time is the time from the output frequency to the set accel/decel time.
Table 5-52: S-Curve Acceleration/Deceleration Parameter Settings
* Initial value is determined by X-Press Programming (
,
).
Time to accelerate from the minimum frequency to the maximum frequency (total acceleration) is:
Time to decelerate from the maximum frequency to the minimum frequency (total deceleration) is:
Figure 5-23: S-Curve Characteristic-FWD/REV Operation
Parameter
Display
Function
Range
Default
D09-01
SCrv Acc @ Start
S-Curve at the beginning of the Accel time.
0.00–10.00 sec
0.50*
D09-02
SCrv Acc @ End
S-Curve at the end of the Accel time.
0.00–10.00 sec
0.50*
D09-03
SCrv Dec @ Start
S-Curve at the beginning of the Decel time.
0.00–10.00 sec
0.50*
D09-04
SCrv Dec @ End
S-Curve at the end of the Decel time.
0.00–10.00 sec
0.20
Total Acceleration = B05-01 +
D09-01 + D09-02
2
Total Deceleration = B05-02 +
D09-03 + D09-04
2
CAUTION
Acceleration and deceleration times will be extended.
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