Delta Electronics VFD-VL manual 1st/4th Acceleration/Deceleration Switching

Chapter 4 Parameters

This parameter selects the frequency point for transition from acceleration/deceleration time 1 to acceleration/deceleration time 4.

The transition from acceleration/deceleration time 1 to acceleration/deceleration time 4, may also be enabled by the external terminals (Pr. 02-01 to 02-08). The external terminal has priority over Pr. 01-23.

		Frequency
				1st Acceleration
				Time	1st Deceleration
	01-23				Time
	1st/4th
	Acceleration
	/Deceleration		4th Acceleration Time		4th Deceleration
	Freq.				Time
			1st/4th Acceleration/Deceleration Switching
01-24	S-curve for Acceleration Departure Time S1					Unit: 0.01
01-25	S-curve for Acceleration Arrival Time S2					Unit: 0.01
Control	VF	VFPG	SVC	FOCPG FOCPM		Factory setting: 1.00
mode
	Settings	0.00~25.00 sec
01-26	S-curve for Deceleration Departure Time S3					Unit: 0.01
01-27	S-curve for Deceleration Arrival Time S4					Unit: 0.01
01-30	S-curve for Deceleration Arrival Time S5					Unit: 0.01
Control	VF	VFPG	SVC	FOCPG FOCPM		Factory setting: 1.00
mode
	Settings	0.00~25.00 sec

It is used to give the smoothest transition between speed changes. The accel./decel. curve can adjust the S-curve of the accel./decel. When it is enabled, the drive will have different accel./decel. curve by the accel./decel. time.

The Actual Accel. Time = selected accel. Time + (Pr.01-24 + Pr.01-25)/2

The Actual Decel. Time = selected decel. Time + (Pr.01-26 + Pr.01-27 + Pr.01-30*2)/2

4-34 Revision Nov. 2008, VLE1, SW V1.03