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Chapter 7- Multi-purpose application
POWERXL DM1 SERIES VARIABLE FREQUENCY DRIVES MN040049EN—September 2021 www.eaton.com
Chapter 7- Multi-purpose application
Introduction
The multi-purpose application is designed for a large set
of applications with the ability to have advanced motor
control systems. It takes the same functions provided in
the standard, fan, and multi-pump applications and adds
in some additional control techniques. The application is
designed with two control places that use eight digital
inputs, two analog inputs, three relay outputs, one digital
output, and two analog outputs that are programmable.
Motor control-wise, it provides the ability to do frequency
and speed control and adds open loop speed control as
well as torque control. For tuning the V/Hz curve, it has the
ability to go out and ID the motor characteristic and enters
those specific measurements into its parameters for better
control. Drive/motor protections are programmable for
desired actions depending on the application. Below is a list
of additional features available in addition to the standard,
fan, and multi-pump application features that are available in
the multi-purpose application.
•
Motor potentiometer reference control;
•
External brake control;
•
Droop function with multiple loads;
•
Motor identification;
•
Motor control modes; and
I/O controls
“Function to Terminal” (FTT) programming
The design behind the programming of the relay outputs
and digital output in the DM1 drive is to use “function to
terminal” programming. It is composed of a terminal be it a
relay output or a digital output that is assigned a parameter.
Within that parameter, it has different functions that can be
set.
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