Annex
English, Revision 09, Date: 13.12.2016
52
A.2
Data direction PLC -> Antenna
In this direction commands are transmitted only when required (by now the command
for starting the monitor program is implemented; see section 4.2.3.1.2 page 20). In or-
der to be visible between the frequent cyclical data output of the antenna, the 3964R
of the antenna has a lower priority (see Figure 23).
Figure 24
Diagram procedure 3964R; PLC —> antenna
B
Procedure „transparent“
For the interconnection antenna <—> PLC a transparent protocol can be used. The fol-
lowing settings have to be observed for the data transmission:
-
1 start bit, 8 data bit, parity even, 1 stop bit, Baudrate 38400 Bd (default) or
19200 Bd.
B.1
Data direction antenna -> PLC
In this direction, cyclical antenna data is transmitted. The duration is parameterize-
able, it should ideally last an integer part of the transponder code transmission or a
plural thereof. The minimum cycle duration depends upon the telegram duration and
thus is defined by the baud rate and the chosen telegram content.
The data sentence always starts with an „=“-character (hex 0x3d). Then the parame-
ters chosen from the respective menu follow. The telegram is to be finished with an 8
bit check sum over all characters including the start character. For the check sum XOR
is performed over all characters. The characters are sent without delay.
