1.2 Purpose of the Manual
This manual is intended to provide detailed information for
the installation and start up of the adjustable frequency
drive.
provides requirements for mechanical
and electrical installation, including input, motor, control
and serial communications wiring and control terminal
functions.
3 Start-up and Functional Testing
provides
detailed procedures for start-up, basic operational
programming, and functional testing. The remaining
chapters provide supplementary details. These details
include user interface, detailed programming, application
examples, start-up troubleshooting, and specifications.
1.3 Additional Resources
Other resources are available to understand advanced
adjustable frequency drive functions and programming.
•
The
VLT
®
Programming Guide
provides greater
detail on working with parameters and many
application examples.
•
The
VLT
®
Design Guide
is intended to provide
detailed capabilities and functionality to design
motor control systems.
•
Supplementary publications and manuals are
available from Danfoss.
See
www.danfoss.com/BusinessAreas/DrivesSo-
lutions/Documentations/VLT+Technical
+Documentation.htm
for listings.
•
Optional equipment is available that may change
some of the procedures described. Reference the
instructions supplied with those options for
specific requirements. Contact the local Danfoss
supplier or visit the Danfoss website:
www.danfoss.com/BusinessAreas/DrivesSolutions/
Documentations/VLT+TeDocumen-
tation.htm
, for downloads or additional
information.
1.4 Product Overview
An adjustable frequency drive is an electronic motor
controller that converts AC line power input into a variable
AC waveform output. The frequency and voltage of the
output are regulated to control the motor speed or torque.
The adjustable frequency drive can vary the speed of the
motor in response to system feedback, such as position
sensors on a conveyor belt. The adjustable frequency drive
can also regulate the motor by responding to remote
commands from external controllers.
In addition, the adjustable frequency drive monitors the
system and motor status, issues warnings or alarms for
fault conditions, starts and stops the motor, optimizes
energy efficiency, and offers many more control,
monitoring, and efficiency functions. Operation and
monitoring functions are available as status indications to
an outside control system or serial communication
network.
1.5 Internal Controller Functions
is a block diagram of the adjustable frequency
drive's internal components. See
for their
functions.
Figure 1.3 Adjustable Frequency Drive Block Diagram
Introduction
VLT
®
Refrigeration Drive Instruction Manual
1-2
MG16J122 - VLT
®
is a registered Danfoss trademark
1
1
