6.1.1 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 are shown.
130BD366.12
+24
V DC
A
B
GND
12
18
32
27
19
29
33
20
Illustration 6.2 24 V or 10-30 V Encoder
B
A
B
A
130BA646.10
CW
CCW
Illustration 6.3 24 V Incremental Encoder, Maximum Cable
Length 5 m
6.1.2 Encoder Direction
The direction of the encoder is determined by which order
the pulses are entering the frequency converter.
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 is determined by looking into the shaft end.
6.1.3 Closed Loop Drive System
A drive system usually consists of more elements such
as:
•
Motor
•
Brake
(Gearbox)
(Mechanical Brake).
•
Frequency converter.
•
Encoder as feedback system.
•
Brake resistor for dynamic braking.
•
Transmission.
•
Load.
Applications demanding mechanical brake control usually
need a brake resistor.
Motor
Gearbox
Load
Transmission
Encoder
Mech. brake
Brake resistor
130BA120.10
Illustration 6.4 Basic Set-up for Closed-loop Speed Control
Application Examples
Design Guide
MG06B402
Danfoss A/S © 09/2014 All rights reserved.
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