Delta Electronics VFD-E manual Example 3 Use of bias and gain for use of full range

Chapter 4 Parameters
60Hz			Pr.01.00=60Hz--Max. output Freq.
			Potentiometer
40Hz			Pr.04.00	=16.7%--Bias adjustment
			Pr.04.01	=0--Positive bias
			Pr.04.02	=100%--Input gain
Bias 10Hz			Pr.04.03 =0--No negative bias command
			Gain:100%
Adjustment
0Hz 0V	5V	10V Bias adjustment:((10Hz/60Hz)/(Gain/100%))*100%=16.7%

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			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
	10Hz			Pr.04.03 =0--No negative bias command
Bias				Gain:(10V/(10V+2V))*100%=83.3%
Adjustment
	-2V0Hz0V	5V	10V Bias adjustment:((10Hz/60Hz)/(Gain/100%))*100%=20.0%
	XV

Example 4: Use of 0-5V potentiometer range via gain adjustment

This example shows a potentiometer range of 0 to 5 Volts. Instead of adjusting gain as example

below, you can set Pr. 01.00 to 120Hz to achieve the same results.

Gain adjustment

60Hz

30Hz

0Hz 0V 5V 10V

Pr.01.00=60Hz--Max. output Freq. Potentiometer

Pr.04.00 =0.0%--Bias adjustment Pr.04.01 =0--Positive bias Pr.04.02 =200%--Input gain

Pr.04.03 =0--No negative bias command Gain:(10V/5V)*100%=200%

4-70 Revision June 2008, 04EE, SW--PW V1.11/CTL V2.11