Delta Electronics VFD-S manual 1-18, Disable S curve, Enable S curve

Chapter 5 ParametersVFD-S Series

1-16Acceleration S-Curve

1-17Deceleration S-Curve

Settings d0 to d7Factory Setting: d0

These two parameters allow you to configure whether the acceleration and/or deceleration ramps are linear or S-shaped. The S-curve is enabled when set at d1-d7. Setting d1 offers the quickest S-curve and d7 offers the longest and smoothest S-curve. The AC drive will not follow the acceleration/deceleration time in Pr.1-09 to Pr.1-12. To Disable the S-curve, set Pr.1-16 and Pr.1-17 to d0.

From the diagram shown below, the original setting acceleration/deceleration time will be for reference when the function of the S-curve is enabled. The actual acceleration/deceleration time will be determined based on the S-curve selected (d1 to d7).

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

1-18	Jog Decelerating Time		Unit: 0.1Sec
	Settings	d0.0 to d600	Factory Setting: d0.0

When Pr.1-18 is set to d0.0 Jog decelerating time determined by the setting of Pr.1-13 0.1 to 600 sec, Jog decelerating time can be set independently, separates from Pr.1-13.

When Pr.1-18 is set to 0.0, Pr.1-13 determines both Jog acceleration and deceleration time. When Pr.1-18 is set between 0.1 to 600 seconds, which will determine Jog Decelerating Time and Pr.1-13 will only determine Jog Accelerating Time.

5-26 Revision August 2008, SE09, SW V2.61