Delta Electronics VFD-M manual Max Output Pr.03 Freq 60Hz Bias 10Hz Pr =

Chapter 4 Parameters

Example 3:

The whole scale of the potentiometer may be used as desired. In addition to the signals 0 to 10V and 4 to 20mA, other popular voltage signals include 0 to 5V, 20 to 4mA or that under 10V.

Max.
Output Pr.03
Freq.		60Hz					35
Bias		10Hz				0	Hz	60
						0V
					Pr. 50 = 10V			10V
Adjustment						X 100% = 83.3%
-2V 0Hz 0V					12V	Potentiometer Scale
				10V	Negative bias:
	XV		4mA	20mA	60-10Hz = 10-0Hz
					10V	XV

XV = 10050 = 2V

Pr.48 = 102 X 100%

Example 4:

This example shows how to use Gain to set a potentiometer range of 0 to 5 Volts for 0-60 Hz. As an option, you also could set Pr. 03 =120Hz.

Max.

Output Pr.03

Freq.

60Hz

30Hz

0Hz 0V

Gain adjustment

Factory Settings

Pr.03=60Hz--Max. output Freq. Pr.48=0.0% bias adjustment Pr.49=0 -- bias polarity Pr.50=200% -- pot. freq. gain Pr.51=0 -- REV motion disable in negative bias

5V	Calculation of gain
	10V	)X100% = 200%
	5V

30

0Hz 60

0V 5V

Potentiometer Scale

Revision May 2008, ME14, SW V3.04 4-45