3
05.01
3.4 Direct position sensing
3-71
© Siemens AG 2008 All Rights Reserved
SIMODRIVE 611 Configuration Manual (PJU) -- 05/2008 Edition
Incremental systems with two sinusoidal voltage signals A, B offset by
90 degrees (several, for distance--coded systems) reference mark(s) R.
Transfer: Differential signals
A,*A;B,*BandR,R*
Amplitude A -- *A 1 Vpp + +20% --25%
Amplitude B -- *B 1 Vpp + 20% --25%
Amplitude R -- *R 0.2 Vpp ... 1 Vpp
Power supply: 5 V ± 5% (also refer to Chapter 3.4.2
Encoder power supply)
Max. power supply current: 300 mA
Max. processable enc. signal frequency: 200 kHz standard module/
420 kHz (as of SW 5.1.14)
1)
350 kHz
Note
For the above specified max. encoder signal frequency, the signal amplitude
must be
² 60% of the nominal amplitude and the deviation of the phase shift
from the ideal 90
d
between track A and B must be ±¦30
d
.
Observe the frequency characteristic of the encoder signals.
A-- *A
B-- *B
R-- *R
0
0
0
90_ el.
360_ el.
Range of uniqueness
Fig. 3-3 Signal characteristic for a clockwise direction of rotation
1) Refer to parameterizable encoder limit frequency (as of SW 5.1.14)
Mo
o
Selec
on
Po
on
S
ee
Sen
n
05.08
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