Chapter 4: AC Drive Parameters
4–46
Analog Input Parameter Examples
Refer to the following equations and examples for changing the ratio of the analog
input signal relative to the output frequency of the drive.
Use the equations below when calculating the values for the Maximum Output
Frequency, Analog Input Offset, Analog Input Gain, and the Mid-point Frequency.
A) Maximum Output Frequency =
(P0.04 Maximum Speed / P0.03 Base Speed) x P0.02 Base Frequency
B) Analog Offset % =
(Minimum Frequency Reference / Maximum Output Frequency) x 100
C) Analog Gain % =
((Max Freq Reference - Min Freq Reference) / Max Output Frequency) x 100
D) Mid-point Frequency =
((Max Freq Reference - Min Freq Reference) / 2) + Min Freq Reference
The Mid-point Frequency calculation shows the frequency reference of the drive when
the potentiometer or other analog input device is at its mid-point.
The Maximum Output Frequency is not a parameter setting, but is needed in order to
calculate the Analog Gain. The default Maximum Output Frequency for the DURA
PULSE
drive is 60Hz. If parameters P0.02, P0.03, or P0.04 are changed, then the Maximum
Output Frequency will change.
DURAPULSE AC Drive User Manual
1st Ed. Rev. D 05/2013
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