Application Examples
4.1.1 Encoder Connection
The purpose of this guideline is to ease the set-up of
encoder connection to the frequency converter. Before
setting up the encoder the basic settings for a closed loop
speed control system will be shown.
Encoder Connection to the frequency converter
4
4
12
Illustration 4.2 24 V or 10-30 V Encoder
A
B
A
B
Illustration 4.3 24 V Incremental Encoder. Max. Cable Length 5
m.
62
18
19
27
29
32
33
CW
CCW
MG06B202 - VLT
®
VLT
AutomationDrive FC 360 Design Guide
4.1.2 Encoder Direction
The direction of encoder is determined by which order the
pulses are entering the drive.
Clockwise direction means channel A is 90 electrical
degrees before channel B.
Counter Clockwise direction means channel B is 90
electrical degrees before A.
The direction determined by looking into the shaft end.
4.1.3 Closed Loop Drive System
A drive system consist usually of more elements such as:
20
•
•
•
•
•
•
•
Applications demanding mechanical brake control will
usually need a brake resistor.
Illustration 4.4 Basic Set-up for Closed Loop Speed Control
®
is a registered Danfoss trademark
Motor
Add
(Gearbox)
(Mechanical Brake)
Frequency converter
Encoder as feed-back system
Brake resistor for dynamic braking
Transmission
Load
Brake resistor
Transmission
Motor
Gearbox
Encoder
Mech. brake
Load
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