Appendix
English, Revision 04, Date: 19.01.2015
50
9
Appendix
A
Procedure 3964R
For the computer interconnection between antenna <—> SPS a 3964R-Protocol may be
used. As the antenna outputs data cyclical, this results in some simplifications during
implementation of the 3964R. The following diagrams describe the procedure.
The following settings need to be observed:
-
Transponder system has lower priority
-
Data transfer is set to 1 start bit, 8 Data bit, parity even, 1 stop bit, Baudrate
19200 Bd (default) or 38400 Bd.
A.1
Data direction antenna -> SPS
In this direction the antenna data is transmitted cyclically. The data sentence always
starts with an „=“-character (hex 0x3d). The cycle time is parameterizeable and should
take a complete part, or multiple thereof, of the transponder code´s transmission line.
In the present system, the duration for the transponder code transmission is 32 ms.
The minimum cycle duration depends upon the telegram length, the Baudrate and the
chosen telegram content.
In the diagram
T_ZVZ
stands for the programmable character delay and
T_QVZ
for the programmable acknowledgement delay.
Figure 28
Diagram procedure 3964R; antenna —> SPS
