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Chapter 5 Parameters_VFD-B Series

5-54

Revision 10/2005, BE13, SW V4.08

04 - 15

aAUI Analog Input Bias Unit: 0.01

Settings 0.00 to 200.00% Factory Setting: 0.00

04 - 16

AUI Bias Polarity

Factory Setting: 00

Settings 00 Positive Bias

01 Negative Bias

04 - 17

aAUI Input Gain Unit: 1

Settings 01 to 200% Factory Setting: 100

04 - 18

AUI Negative Bias, Reverse Motion Enable/Disable

Factory Setting: 00

Settings 00 No AUI Negative Bias Command

01 Negative Bias: REV Motion Enabled

02 Negative Bias: REV Motion Disabled

In a noisy environment, it is advantageous to use negative bias to provide a noise margin.

Pr.04-00 ~ 04-03, Pr.04-11 ~ 04-18 are used when the source of frequency command is the analog signal.

Refer to the following examples.

Example 1: Standard application

This is the most used setting. The user only needs to set Pr.02-00 to 01, 02 or 03. The frequency command

comes from external potentiometer/current signal on AVI, ACI or AUI.

60Hz

0Hz

12m

10V

20m

Pr.01-00=60Hz--Max. output Freq.

AVI ACI AUI

Pr.04-00 Pr.04-11 Pr.04-15=0%--Bias adjustment

Pr.04-01 Pr.04-12 Pr.04-16=0--Positive bias

Pr.04-02 Pr.04-13 Pr.04-17=100%--Input gain

Pr.04-03 Pr.04-14 Pr.04-18=0No negative bias command

30Hz

Delta VFD-B Series User Manual

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