Delta VFD022B21A - Deceleration S-Curve

Chapter 5 Parameters_VFD-B Series
5-36
Revision 10/2005, BE13, SW V4.08
01 – 16
Acceleration S-Curve
01 – 17
Deceleration S-Curve
Factory Setting: 00
Settings 00 S-curve disabled
01 to 07 S-curve enabled (07 is smoothest)
This parameter is used to ensure smooth acceleration and deceleration via S-curve.
The S-curve is disabled when set to 00 and enabled when set to 01 to 07.
Setting 01 gives the quickest and setting 07 the longest and smoothest S-curve.
The AC motor drive will not follow the Accel/Decel Times in Pr.01-09 to Pr.01-12 and Pr.01-18 to Pr.01-21
when S-curve is enabled.
The diagram below shows that the original setting of the Accel/Decel Time is only for reference when the S-
curve is enabled. The actual Accel/Decel Time depends on the selected S-curve (01 to 07).
3
1
2
4
1
3
4
2
1 2
3 4
Disable S curve
Enable S curve
Acceleration/deceleration Characteristics