Delta Electronics VFD-EL manual Disable S curve, Enable S curve

Chapter 4 Parameters

01.17 Acceleration S-Curve

01.18 Deceleration S-Curve

Unit: 0.1/0.01

Unit: 0.1/0.01

Factory Setting: 0

Settings	0.0	S-curve disabled
	0.1 to 10.0/0.01 to 10.00	S-curve enabled (10.0/10.00 is the smoothest)

This parameter is used to ensure smooth acceleration and deceleration via S-curve.

The S-curve is disabled when set to 0.0 and enabled when set to 0.1 to 10.0/0.01 to 10.00. Setting 0.1/0.01 gives the quickest and setting 10.0/10.00 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.

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 (0.1 to 10.0).

The total Accel. Time=Pr.01.09 + Pr.01.17 or Pr.01.11 + Pr.01.17

The total Decel. Time=Pr.01.10 + Pr.01.18 or Pr.01.12 + Pr.01.18

	1			2
		3		4
	1			2
		3		4
1	2		3	4
Disable S curve
			Enable S curve
		Acceleration/deceleration Characteristics

4-36 Revision August 2008, 2ELE, V1.02