Firmware Manual

Chapter 6—Multi-Pump and Fan Control Application
PowerXL DG1 Series Adjustable Frequency Drives MN040004EN—March 2014 www.eaton.com 46
Chapter 6—Multi-Pump and Fan Control Application
Introduction
The Multi-Pump and Fan Control Application is designed to
be used in applications where multiple pumps or fan systems
are used to maintain a desired flow rate, pressure, or
temperature value. It gives the ability to use a single PID loop
to control one drive and have auxiliary motors connected via
drives or contactors start and stop based off the desired
process. It also provides the ability to auto-change between
the multiple motors to keep run times equal. Controlwise it
allows for 2 control and reference place selections with
8 digital inputs and 2 analog inputs that are programmable.
For monitoring the system and turning on aux motors, there
are 3 programmable relay outputs, 1 digital output, and
2 sets of analog outputs that are programmable. The
application allows for full customization of the motor control
scheme with frequency or speed control along with
customizing the V/Hz curve. Drive/Motor protections can be
customized to defined actions. Below is a list of other
features in addition to the Standard Application features that
are available in the Multi-Pump and Fan Control Application.
Select the Multi-Pump and Fan Application in menu P21.1.2.
Multi-Pump and Fan includes all the functions in Standard
Application and Additional functions:
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Damper control
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Fire mode
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Smoke purge mode
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Interlock for motors
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Multi-Pump control
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Auto change function
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Bypass
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Real time clock function—Timer
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Real time clock function—Interval
●
PM setback
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Two independent set of motor Parameter
●
PID
I/O Controls
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“Terminal To Function” (TTF) Programming
The design behind the programming of the digital inputs in
the DG1 drive is to use “Terminal To Function”
programming, which is composed of multiple functions that
get assigned a digital input to that function. The parameters
in the drive are set up with specific functions and by defining
the digital input and slot in some cases, depending on which
options are available. For use of the drives control board
inputs, they will be referred to as DigIN:1 through DigIN:8.
When additional option cards are used, they will be defined
as DigIN:X:IOY:Z. The X indicates the slot that the card is
being installed in, which will be either A or B. The IOY
determines the type of card it is, which would be IO1 or IO5.
The Z indicates which input is being used on that available
option card.
●
“Function To Terminal” (FTT) Programming
The design behind the programming of the relay outputs
and digital output in the DG1 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.
The parameters of the Multi-Pump and Fan Control
Application are explained on Page 130 of this manual,
“Description of Parameters.” The explanations are arranged
according to the parameter