Device Description HG G-71912-A | English, Revision 03 | Date: 28.03.2018
49
Appendix – Chapter 9
Figure 26
Status diagram procedure 3964R; Antenna –> PLC
B.2 Data direction PLC -> Antenna
In this direction, commands are transmitted only when required (e. g. when the reference
transponder is activated). To overcome the frequent cyclical data output of the antenna, the
3964R of the antenna has a lower priority.
.
Figure 27
Status diagram procedure 3964R; PLC –> Antenna
C Procedure "transparent"
For the interconnection antenna <–> PLC a transparent protocol can be used. The following
settings have to be observed for the data transmission:
–
1 start bit, 8 data bit, parity even, 1 stop bit, Baudrate 9600 Baud (default) or
19200 Baud.
Program For Interpreting, Positioning And Decoding
wait
wait for sign
wait for sign
send all signs
Receiving mode
incoming
data
send NAK
send STX
send NAK
receive sign
!=NAK
receive STX
receive DLE
or receive
sign
Cyclical d
a
ta reception
(low p
rio
rity)
or sign !=
LE or STX)
or
Program For Interpreting, Positioning And Decoding
send NAK
send DLE
send NAK
receive
STX
receive
other
sign
wait for sign
wait
Transfer values &
send DLE
received, but
or BCC oder parity
wrong
received. n=N and
BCC correct
Receivin
g
mode
(command
mode
, r
eceives
c
o
mmand
s
if
re
qui
red
