Delta Electronics VFD-EL series User Manual

Chapter 4 Parameters|
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4-48 Revision 2016/03, 6ELE, V1.14
Group 4: Input Function Parameters
04.00
Keypad Potentiometer Bias Unit: 0. 1
Settings 0.0 to 100.0% Factory Setting: 0.0
04.01
Keypad Potentiometer Bias Polarity
Factory Setting: 0
Settings 0 Positive Bias
1 Negative Bias
04.02
Keypad Potentiometer Gain Unit: 0.1
Settings 0.1 to 200.0% Factory Setting: 100.0
04.03
Keypad Potentiometer Negative Bias, Reverse Motion
Enable/Disable
Factory Setting: 0
Settings 0 No Negative Bias Command
1 Negative Bias: REV Motion Enabled
Example 1: Standard application
This is the most used setting. The user only needs to set Pr.02.00 to 04. The frequency command comes from
keypad potentiometer.
60Hz
0Hz
0V
5V
10V
Pr.01.00=60Hz--Max. output Freq.
Potentiometer
Pr.04.00 =0%--Bias adjustment
Pr.04.01 =0--Positive bias
Pr.04.02 =100%--Input gain
Pr.04.03 =0--No negative bias command
30Hz
Example 2: Use of bias
This example shows the influence of changing the bias. When the input is 0V the output frequency is 10 Hz. At mid-
point a potentiometer will give 40 Hz. Once the Maximum Output Frequency is reached, any further increase of the
potentiometer or signal will not increase the output frequency. (To use the full potentiometer range, please refer to
Example 3.) The value of external input voltage/current 0-8.33V corresponds to the setting frequency 10-60Hz.
60Hz
0Hz
0V
5V
10V
Pr.01.00=60Hz--Max. output Freq.
Potentiometer
Pr.04.00 =16.7%--Bias adjustment
Pr.04.01 =0--Positive bias
Pr.04.02 =100%--Input gain
Pr.04.03 =0--No negative bias command
Gain:100%
Bias adjustment:((10Hz/60Hz)/(Gain/100%))*100%=16.7%
10Hz
Bias
Adjustment
40Hz
Example 3: Use of bias and gain for use of full range
This example also shows a popular method. The whole scale of the potentiometer can be used as desired. In
addition to signals of 0 to 10V, the popular voltage signals also include signals of 0 to 5V, or any value under 10V.
Regarding the setting, please refer to the following examples.
60Hz
0Hz
0V
5V
10V
Pr.01.00=60Hz--Max. output Freq.
Potentiometer
Pr.04.00 =20.0%--Bias adjustment
Pr.04.01 =0--Positive bias
Pr.04.02 =83.3%--Input gain
Pr.04.03 =0--No negative bias command
Gain:(10V/(10V+2V))*100%=83.3%
Bias adjustment:((10Hz/60Hz)/(Gain/100%))*100%=20.0%
10Hz
Bias
Adjustment
-2V
XV

Delta Electronics VFD-EL series Specifications

General

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