3
05.01
3.4 Direct position sensing
3-70
©
Siemens AG 2012 All Rights Reserved
SIMODRIVE 611 Configuration Manual (PJU) – 02/2012 Edition
Singleturn, multiturn and linear absolute systems with two sinusoidal volt-
age signals A, B offset by 90 degrees and EnDat interface
Transfer, incremental signals:
Differential signals
A, *A and B, *B
Amplitude A – *A
1 Vpp + +20% –25%
Amplitude B – *B
1 Vpp + 20% –25%
Transfer, serial signals:
Differential signals
data, *data and clock, *clock
Signal level:
acc. to EIA 485
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
0
0
90
el.
360
el.
Fig. 3-4
Signal curve of incremental tracks for clockwise rotation
1) Refer to parameterizable encoder limit frequency (as of SW 5.1.14)
3 Motor Selection, Position/Speed Sensing
05.08