Automation Direct DURApulse GS4 User Manual page 209

a i P
nalog nPut araMeter
In this example, the Analog Input will have a positive offset while still using the full scale of the
potentiometer or other analog signal device. When the analog signal is at its lowest value (-10V,
0V, 0mA, or 4mA), the set-point frequency will be at 10Hz. When analog signal is at its maximum
value (10V or 20mA), the set-point frequency will be 60Hz.
• Minimum Frequency Reference = 10Hz
• Maximum Frequency Reference = 60Hz
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 % = ( 10Hz / 60Hz ) x 100 = 16.7%
Analog Input (AIx)
AIx Bias Parameter
C) Analog Gain % = [(60Hz – 10Hz) / 60Hz] x 100 = 83.3% = AIx Input Gain
Analog Input
Polarity
AIx Gain Parameter
D) Mid-point Frequency = [(60Hz – 10Hz) / 2] + 10Hz = 35Hz
Parameter Settings
Analog Input
Polarity
AIx Bias Parameter
AIx Polarity Parameter
AIx Gain Parameter
Reverse Run Parameter
Drive Max Output Freq
Results
Examples
• Output Freq = [ (Analog_In%) x (Gain%) + (Bias%) ] x Max_Out (Hz)
• For AI1 set to 0~10V, and an analog input of 1 Volt:
Output Freq = [ (1/10) x (0�833) + (0�167) ] x 60Hz = 15Hz
• For analog input of 7 Volts:
Output Freq = [ (7/10) x (0�833) + (0�167) ] x 60Hz = 45Hz
DURA
GS4 AC Drive User Manual – 1st Ed, Rev A - 10/20/2017
pulse
e 3: P
xaMPle ositive
page 4–112 for formulas)
AI1 AI2
P4�10 P4�15
AI1
Positive (+) Positive (+)
P4�12
AI1 or AI2 or
Positive (+) Positive (+)
P4�10 P4�15
P4�11 P4�16
P4�12 P4�17
Maximum Output
Frequency
Positive Offset
Chapter 4: AC Drive Parameters
o
FFset
AI3
P4�19
AI2 AI3
Positive (+) Negative (-)
P4�17 P4�21 P4�22
AI3
Positive (+) Negative (-)
P4�19
P4�20
P4�21 P4�22
P4�09
P0�04
60Hz
35Hz
10Hz
0Hz
0V 5V 10V
-10V 0V 10V
0mA 10mA 20mA
4mA 12mA 20mA
Parameter Settings
16�7%
1: Positive Offset
83�3%
0: Digital FWD/REV
60Hz
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