AutomationDirect DURAPULSE GS3-2010, User Manual

Page: 122 / 316

Chapter 4: AC Drive Parameters
4–54
Example 8: Trim Mode
This example illustrates using the drive in Trim Mode with a Trim Reference
Frequency
• Minimum Frequency Reference = 0Hz
• Maximum Frequency Reference = 45 Hz
• Output Frequency = Frequency Command - Trim Reference Frequency
Calculations
A) Max Output Frequency = (1750 rpm / 1750 rpm) x 60 Hz = 60 Hz
B) Analog Offset % = (0Hz / 60 Hz) x 100 = 0%
C) Analog Gain % = ((60 Hz – 0Hz) / 60 Hz) x 100 = 100%
D) Mid-point Frequency = ((60 Hz – 0Hz) / 2) + 0Hz = 30 Hz
• Actual Output Frequency
P4.18=04
= Freq Command – Trim Ref Freq
Parameter Settings
P4.01: 00 (default) – Offset disabled
P4.02: 00 (default) – 0% Analog Input Offset
P4.03: 100 (default) – 100% Analog Input Gain
P4.04: 00 (default) – Forward Motion Only
P4.17: 15 – Trim Reference Frequency = 15 Hz
P4.18: 04 – Output Frequency = Frequency Command - Trim Reference Frequency
Results
0Hz
30Hz
60Hz
-15Hz
15Hz
45Hz
Frequency Command
Output Frequency
The drive will not reverse direction unless
the Frequency Command is from an analog input,
and reverse motion is enabled in P4.04.
0V 2.5V 5V 10V
-10V -5V 0V 10V
0mA 5mA 10mA 20mA
4mA 8mA 12mA 20mA
FORWARD
DURA
PULSE AC Drive User Manual 1st Ed. Rev. D 05/2013