Kübler Limes BA5, Руководство пользователя

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EN 21/38
English
Manual
Limes LA50 / BA5
Absolute Magnetic Length Measurement System
7. Design and Functions
7.1 Connections and Interfaces
The following chapters give detailed informations about connections and interfaces.
7.2 Interface SSI
Principle of the function: If the clock is not interrupted for the time Tm-T/2 (output of further
25 periods), the shift register clocks once again the same data value (error recognition in
evaluation).
Some encoders contain a Power Failure Bit (PFB):
With LA50 the PFB is always „low“.
Not inverted SSI clock
Figure 5: Readout of data (2-time with 25 clocking)
By using the decoding switch, which is located behind a protection cap on the top of the
sensor, the data format of the SSI interface can be changed over with the help of a micro
screwdriver from Binary code to Gray code.
Gray/Binary
Switch
LED
Position Code
1 Binary
0 Gray*
*default
PFB = Power failure bit
T = Cycle duration of clock pulse
Tm = Monoflop time > 15 μs