1
LCP (Local Control Panel)
9
Relay 2 (04, 05, 06)
2
RS-485 serial bus connector
10
Lifting ring
3
Digital I/O and 24 V power supply
11
Mounting slot
4
Analog I/O connector
12
Cable clamp (PE)
5
USB connector
13
Earth (ground)
6
Serial bus terminal switch
14
Motor output terminals 96 (U), 97 (V), 98 (W)
7
Analog switches (A53), (A54)
15
Mains input terminals 91 (L1), 92 (L2), 93 (L3)
8
Relay 1 (01, 02, 03)
Table 1.1
1.2 Purpose of the Manual
This manual is intended to provide detailed information for
the installation and start up of the frequency converter.
2 Installation
provides requirements for mechanical and
electrical installation, including input, motor, control and
serial communications wiring, and control terminal
functions.
3 Start Up and Commissioning
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
frequency converter 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.
•
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 for
downloads or additional information.
1.4 Product
Overview
A frequency converter is an electronic motor controller
that converts AC mains input into a variable AC waveform
output. The frequency and voltage of the output are
regulated to control the motor speed or torque. The
frequency converter can vary the speed of the motor in
response to system feedback, such as position sensors on a
conveyor belt. The frequency converter can also regulate
the motor by responding to remote commands from
external controllers.
In addition, the frequency converter 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
Figure 1.3
is a block diagram of the frequency converter's
internal components. See
Table 1.2
for their functions.
Figure 1.3 Frequency Converter Block Diagram
Area
Title
Functions
1
Mains input
•
Three-phase AC mains power
supply to the frequency
converter
2
Rectifier
•
The rectifier bridge converts
the AC input to DC current to
supply inverter power
3
DC bus
•
Intermediate DC-bus circuit
handles the DC current
Introduction
VLT® Automation VT Drive FC 322 D-Frame Instruction Manual
1-2
MG21E122 - VLT® is a registered Danfoss trademark
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1
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