Use Negative Slope; Avi, Aci, Aui Analog Input Delay; Analog Input Frequency Resolution - Delta VFD-B User Manual

Chapter 5 Parameters|VFD-B Series
Example 8: Use negative slope
In this example, the use of negative slope is shown. Negative slopes are used in applications for
control of pressure, temperature or flow. The sensor that is connected to the input generates a
large signal (10V or 20mA) at high pressure or flow. With negative slope settings, the AC motor
drive will slow stop the motor. With these settings the AC motor drive will always run in only one
direction (reverse). This can only be changed by exchanging 2 wires to the motor.
60Hz
negative slope
0Hz
0V
4mA
04 - 19
AVI Analog Input Delay
Settings
04 - 20 ACI Analog Input Delay
Settings
04 - 21 AUI Analog Input Delay
Settings
These input delays can be used to filter noisy analog signals.
04 - 22

Analog Input Frequency Resolution

Settings
It is used to set the unit of the resolution of frequency command when the input source is an
analog signal.
5-52
Pr.01-00=60Hz--Max. output Freq.
AVI ACI
Pr.04-00 Pr.04-11 Pr.04-15=100%--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=1--Negative bias: REV motion enabled
Gain:(10V/10V)*100%=100%
10V
Bias adjustment:((60Hz/60Hz)/(Gain/100%))*100%=100%
20mA
0.00 to 10.00 sec
0.00 to 10.00 sec
0.00 to 10.00 sec
00 0.01Hz
01 0.1Hz
AUI
Revision July 2008, BE16, SW V4.08 & V5.00
Unit: 0.01
Factory Setting: 0.05
Unit: 0.01
Factory Setting: 0.05
Unit: 0.01
Factory Setting: 0.05
Factory Setting: 01