Automation Direct DURApulse GS4 User Manual page 216

Chapter 4: AC Drive Parameters
a i
nalog nPut
This example illustrates the use of an inverse analog speed reference to the drive. The minimum
analog reference value corresponds to the full forward output frequency of the drive.
• Minimum Frequency Reference = 60Hz
• Maximum Frequency Reference = 0Hz
For AI1, AI2, and AI3: P4.24 (AI V/Hz Calculated Selection) MUST BE SET TO ZERO (All Inputs
Use Bias and Gain) TO ENABLE BIAS AND GAIN CALCULATIONS.
Calculations (see
A) Drive Maximum Output Frequency = P0.04 = (1750 rpm / 1750 rpm) x 60Hz = 60Hz
B) Analog Offset % = [(-60Hz) / (60Hz - 0Hz)] x 100 = -100%
Analog Input (AIx)
AIx Bias Parameter
C) Analog Gain % = [(60Hz - 0Hz) / 60Hz] x 100 = 100% = AIx Input Gain
Analog Input
Polarity
AIx Gain Parameter
D) Mid-point Frequency = [(60Hz - 0Hz) / 2] + 0Hz = 30Hz
Parameter Settings
Analog Input
Polarity
AIx Bias Parameter
AIx Polarity Parameter
AIx Gain Parameter
Reverse Run Parameter
Drive Max Output Freq
Results
Page 4–122
P e 10: i
araMeter xaMPle
page 4–112 for formulas)
AI1
P4�10
AI1
Positive (+)
P4�12
AI1 or
Positive (+) Positive (+)
P4�10
P4�11
P4�12
Maximum
Output
Frequency
DURA
a s r
nverse nalog Peed eFerence
AI2 AI3
P4�15 P4�19
AI2
Positive (+) Positive (+)
P4�17 P4�21
AI2 or AI3
Positive (+) Negative (-)
P4�15 P4�19
P4�16 P4�20
P4�17 P4�21
P4�09
P0�04
60Hz
30Hz
0Hz
0V 5V
-10V 0V
0mA 10mA
4mA 12mA
GS4 AC Drive User Manual – 1st Ed, Rev A - 10/20/2017
pulse
AI3
Negative (-)
P4�22
Parameter Settings
-100�0%
1: Positive Offset
P4�22 100�0%
0: Digital FWD/REV
60Hz
10V
10V
20mA
20mA