Commissioning
English, Revision 09, Date: 13.12.2016
13
Figure 9
The same driving situation as shown in Figure 7, this time with high noise lev-
el
When comparing the diagrams one can see that the wrong calibration shown in Figure
8 on page 12 makes the sum voltage drop and thus the reception periods for
Code_OK
and
POSI
decrease. This can lead to decoding problems for higher crossing speeds.
In Figure 9 on page 13 the code of the weaker transponder is read correctly however
the position measuring can no longer be performed correctly.
NOTE!
Although sum and difference are called voltages those two val-
ues are in fact no voltages but logarithmic derivations of the
actual voltages.
For the test runs two transponders with different signal strengths have been crossed
shortly one after the other. The settings were:
Variable
Set value
Level to Noise Error
250
Number of equal Codes
2
Threshold for Decoding
256
Level for Positioning/Calculation
256
Table 1
Reference values for the commissioning runs
Transponderdecodierung mit Störspannung
0
100
200
300
400
500
600
700
800
900
1000
0
0
0
0
16
32
16
32
16
32
16
32
16
32
16
32
16
32
16
32
16
32
16
32
16
32
16
32
16
32
16
32
16
32
16
32
16
32
16
32
16
32
16
32
16
32
16
32
16
32
16
32
16
32
16
32
16
32
16
32
16
32
16
32
16
32
16
32
16
32
16
32
16
32
16
32
16
32
16
32
16
32
16
32
16
32
16
32
16
32
20
49
20
49
20
49
20
49
20
49
20
49
20
49
20
49
Us
CODE_OK
code_count
err_count
POSI