Balluff BIR 01 K15SL 000S15-Serie Betriebsanleitung Seite 46

BIR 01- _ _ _ _ -K15SL _-000S15
Inductive Rapid Positioning System
7
SSI interface (continued)
Asynchronous operation
Asynchronous operation means that the external sampling
frequency is independent of the internal sampling
frequency of the BIR. Depending on the external query
point, the position is more or less current and the position
delay t is not constant. In the worst case, it is equal to the
D
internal sampling period. The BIR always works with the
maximum possible internal sampling frequency.
The following graphic shows the behavior of internal and
external sampling in asynchronous operation:
Clk
Data
External
sampling point
Internal sampling
point + processing
New value available
Position delay
Fig. 7-2: Behaviour in asynchronous operation
The sampling frequency is the reciprocal value
of the time between two clock packages and
may not be confused with the SSI clock
frequency.
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