3
05.01
3.4 Direct position sensing
3-73
© Siemens AG 2008 All Rights Reserved
SIMODRIVE 611 Configuration Manual (PJU) – 05/2008 Edition
Incremental signals with two square wave signals A, B offset by 90 de-
grees and reference mark(s) R SIMODRIVE 611 universal HRS/
SIMODRIVE universal HRS E
Transfer: Differential signals
A, *A; B, *B and R, *R
Signal level: According to RS422
Power supply: 5 V
5% (also refer to Chapter 3.4.2
Encoder power supply)
Max. power supply current: Max. 300 mA
Max. encoder signal frequency
that can be evaluated: 420 kHz
Note
For the above specified max. encoder signal frequency, the edge clearance
between track A and B must be ≥ 200 ns.
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. 3-5 Signal characteristic for a clockwise direction of rotation
3 Motor Selection, Position/S
eed Sensin
05.08
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