4.10.
Error cases
The following table summarizes error cases and the corresponding functions.
Table 15 - Error cases
Error case
Application to
modes
Output value
LED signalization
Detection below sensors
minimum range (50 cm)
Mode 1 to 6
0x0000
Th1 LED blinks RED until
the read distance reaches
background threshold
again
No LED signalization in
operating mode 6
Detection beyond sensors
maximum range (12.5 m)
Mode 1 to 6
0xFFFF
Th2 LED blinks RED until
the read distance reaches
background threshold
again
No LED signalization in
operating mode 6
Invalid reading
-
Ambient light too high
-
Target surface too
reflective
-
Object closer than 50
cm (min. range)
-
Object too far (beyond
12.5 m)
Mode 1 to 5
0x0001
Th1 LED stays continuously
ON (RED);
Th2 LED blinks RED until
the read distance reaches
background threshold
again
Invalid reading applicable only
for Mode 6
-
Ambient light too high
-
Target surface too
reflective
-
Object closer than 50
cm (min. range)
-
Object too far (beyond
12.5 m)
Mode 6
0x0001
Th1 LED stays continuously
ON (ORANGE)
Th2 LED stays continuously
ON (GREEN)
In Operating Mode 6, the only error which is indicated by sensors LED is the
“Invalid reading” message. LED indicator, Th1, will stay continuously ON (ORANGE)
and Th2 will remain GREEN.
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