Delta Electronics VFD-M manual +10V DC or 4 to 20mA DC. Refer to the following examples

Chapter 4 Parameters

Pr.48 to Pr.51 are used when the source of frequency command is the analog signal (0 to

+10V DC or 4 to 20mA DC). Refer to the following examples.

Example 1:

Set Pr.00=1 to command frequency with the potentiometer on keypad or Pr.00=2 (4 to 20mA current signal) potentiometer/current signal of external terminal.

Max.

Output Pr.03

Freq.

60Hz		Factory Settings		30
		Pr.03=60Hz--Max. output Freq.
		Pr.48=0%--bias adjustment
		Pr.49=0 -- bias polarity
		Pr.50=100% -- pot. freq. gain	0		60
		Pr.51=0 -- REV disable in		Hz
			0V		10V
0Hz		negative bias
			Potentiometer Scale
0V	5V	10V
4mA	12mA	20mA

Example 2:

A Bias Adjustment (16.7% of 60Hz) determines the Output Frequency to be 10 Hz with the potentiometer set at 0V as shown. Notice that the entire V/F is transposed accordingly. An analog input voltage 0-8.33V (or current 4-13.33mA) would set frequency as 0-60Hz.Once the Maximum Output Frequency is reached any further increase on the potentiometer will not increase output frequency (If you want to use the range of 60Hz, please refer to the example 3).

Max.
Output Pr.03
Freq.
60Hz
Bias 10Hz
Adjustment
0Hz 0V	5V
4mA	12mA

Factory Settings

Pr.03=60Hz--Max. output Freq. Pr.48=16.7%-- bias adjustment Pr.49=0 -- bias polarity Pr.50=100% -- pot. freq. gain Pr.51=0 -- REV motion disable in negative bias

10V

20mA

	40
	60	It is
10
	Hz	60Hz
0V	10V	in this

range.

Potentiometer Scale

4-44 Revision May 2008, ME14, SW V3.04