Delta Electronics VFD-EL series User Manual

Chapter 4 Parameters|
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4-32 Revision 2016/03, 6ELE, V1.14
01.16
Auto-Acceleration / Deceleration
Factory Setting: 0
Settings 0 Linear acceleration / deceleration
1 Auto acceleration, linear Deceleration.
2 Linear acceleration, auto Deceleration.
3 Auto acceleration / deceleration (set by load)
4 Auto acceleration / deceleration (set by Accel/Decel Time setting)
 With Auto acceleration / deceleration it is possible to reduce vibration and shocks during starting/stopping the
load.
During Auto acceleration the torque is automatically measured and the drive will accelerate to the set
frequency with the fastest acceleration time and the smoothest starting current.
During Auto deceleration, regenerative energy is measured and the motor is smoothly stopped with the
fastest deceleration time.
But when this parameter is set to 4, the actual accel/decel time will be equal to or more than parameter
Pr.01.09 ~Pr.01.12.
 Auto acceleration/deceleration makes the complicated processes of tuning unnecessary. It makes operation
efficient and saves energy by acceleration without stall and deceleration without brake resistor.
 In applications with brake resistor or brake unit, Auto deceleration shall not be used.

01.17
Acceleration S-Curve Unit: 0.1/0.01
01.18
Deceleration S-Curve 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
3
1
2
4
1
3
4
2
1 2
3
4
Disable S curve
Enable S curve
Acceleration/deceleration Characteristics
01.20
Simple Positioning Stop Frequency 0 Unit: 0.01
Settings 0.00 ~599.00Hz Factory Setting: 0.0
0
01.21
Simple Positioning Stop Frequency 1 Unit: 0.01

Delta Electronics VFD-EL series Specifications

General

Brand	Delta Electronics
Model	VFD-EL series
Category	Media Converter
Language	English