6
9
KEB COMBIVERT F4-F
8
Name: Basis
09.08.00
Chapter
Section
Page
Date
©
KEB Antriebstechnik, 1999
All Rights reserved
Functional Description
Encoder Interface
The encoder interfaces support following input signals:
Encoder interface 1 (X4)
Encoder interface 2 (X5)
Rectangular signal with 2…5 V
Rectangular signal with 2…5 V
sine-wave signal with 1 Vss
The max. signal frequency, which is given out by the encoder, is calculated as follows:
Input signals
n
max
[min
-1
] x z
60000
f
max
[kHz] =
f
max
:
max. signal frequency
n
max
: max. speed
z:
encoder line number
TTL-voltage differential levels according
to TIA/EIA-RS422-B
Sine-wave signal U
ss
=1 Vss; U
0
=2,5 V;
(only for X4)
6.9.4.a Input signals
The following condition must be met:
f
max
< max. operating frequency of encoder < max. operating frequency of interface
The two, by 90° electrical out of phase signals, A and B as well as their inverted signals are
generally evaluated. The zero track is needed for the reference point approach in the
positioning module. Zero track (also reference marking channel) gives out 1 signal per
revolution.
0° 90° 360°
A
A
B
B
N
N
A
U
0
A
U
0
B
U
0
B
U
0
N
U
0
N
U
0
90°
U
ss
U
ss
U
ss
U
ss
0,5 V
ss
0,5 V
ss