Device Description HG G-71915ZA | English, Revision 01 | Date: 09.09.2021
19
Operating Principle – Chapter 5
The transponder code can be reprogrammed via the antenna for compatible read/
write transponders. The programming process can alternatively be triggered via bus
telegrams (section 10.3 on page 39) or the service interface (section 9.2.5 on page
36).
5.2 Reading Area and LEDs
The reading area comprises the entire area below the reading side of the antenna at
the reading distance.
Figure 7
Reading area
The antenna is designed to be 1-dimensional. It detects a transponder in the reading
range and generates a PosiPulse when the center of the antenna moves over the
transponder. It can also detect under which half of the antenna a transponder is lo
-
cated.
The antenna indicates its operating status via LEDs that illuminate the lane. Thus,
even when the antenna is mounted under a vehicle, one of the following states can
be detected from the outside.
Figure 8
Display of the operating status via LEDs
Ground
Tr
ansponder
Reading area of the antenna
Transponder antenna
Direction of travel
Ground
Tr
ansponder
Tr
ansponder
Tr
ansponder
Tr
ansponder
Transponder antenna
Transponder antenna
Transponder antenna
Transponder antenna
Direction of travel in this example
Transponder under this half of the antenna:
All LEDs light up green
Antenna center axis crosses transponder:
PosiPulse, all LEDs light up white
Transponder under this half of the antenna:
All LEDs light up blue
Error/Note:
All LEDs light up/flash red *)
PosiPulse
À
Á
Â
*) You can find an overview of all possible error codes in section 14.2 on page 57
