3
05.01
3.4 Direct position sensing
3-69
©
Siemens AG 2012 All Rights Reserved
SIMODRIVE 611 Configuration Manual (PJU) – 02/2012 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, *B and R, 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
60% of the nominal amplitude and the deviation of the phase shift
from the ideal 90
between track A and B must be
30
.
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)
3 Motor Selection, Position/Speed Sensing
05.08
