Device Description HG G-71915ZA | English, Revision 01 | Date: 09.09.2021
38
Chapter 10 – Interfaces
10
Interfaces
10.1 PosiPulse (Positioning Pulse)
After crossing the center of the antenna, a 20 mA current limited output is switched
to +UB, available at pin 2 of the POWER connector. The duration of the PosiPulse can
be set via the service interface (see section 9.2.2 on page 33).
The following applies to the PosiPulse:
A positioning pulse is generated only after prior decoding of a transponder.
Exactly one PosiPulse is triggered for a transponder crossing.
For a PosiPulse to be triggered again for a transponder that has already been
read, the transponder must have left the read range in the meantime.
The PosiPuls is transmitted alternatively to the way described here in the status of
the CAN telegram. However, the latency time of the data output period must be tak
-
en into account. In addition, a CAN telegram without data content can also be trig
-
gered directly by the positioning pulse, see section 10.3.2.2 on page 40.
The positioning pulse output is internally connected to +UB (no potential separation).
For safety reasons, a 20 mA current limit is implemented in the antenna for this out
-
put. If, for example, a +UB voltage output is required, pin 2 can be connected to GND
via a resistor of 1 kOhm as shown in the following figure.
Figure 23
Connection options positioning pulse
10.2 System States Status 1 and Status 2
The system can output several states or also error messages via the bus interface.
Table 9
Status 1: Possible systems states / error messages (part 1 of 2)
Bit
Meaning
0
Error internal time base
1
Error CRC transponder code
2
Error USB interface
Pin
HG G-71915
2
5
Posi
Pulse
Posi
+UB
GND
Connection to a relay
Connection to a PLC
Pin
HG G-71915
2
5
Posi
Pulse
Posi
+UB
GND
SPS
