Chapter 2
Multidrop Communications
2-10
MS-5000 Multidrop Concentrator User’s Manual
2-
M
ul
tidro
p Comm
.
Multiple Select Sequence
When sending a select command (figure 2-5 on page 2-8) to Decoder 01
through Concentrator X and Concentrator 02, for example the Trigger Count
request <T>, the host transmits:
0201<T>CR
It does not address Concentrator X because it is communicating with Con-
centrator X in an unpolled mode.
First Select Sequence.
When concentrator X receives the command, it
strips away the 02, substitutes 1F hex as the select address, and forwards
the remaining command, 01<T>, to Concentrator 02, shown in figure 2-8.
Figure 2-8 Concentrator to Concentrator Select Sequence
Second Select Sequence.
Concentrator 02 then relays the command to
Decoder 01 in a typical select sequence as shown earlier in figure 2-3 on
page 2-4. It strips off the 01 from the command, substitutes 1D hex as the
select address, and transmits the remaining data, <T>, to Decoder 01, shown
in figure 2-9.
Figure 2-9 Concentrator to Decoder Select Sequence
RES 1F REQ
1F ACK
STX 01<T> ETX LRC
1F ACK
RES
Concentrator 02
Concentrator X
Start of Sequence
End of Sequence
R ES 1F R EQ
1F AC K
STX 01< T> ETX LR C
1F AC K
R E S
Concentrator 02
Concentrator X
Start of Sequence
End of Sequence
Summary of Contents for MS-5000
Page 1: ...MS 5000 Multidrop Concentrator User s Manual P N 83 005000 REV J...
Page 8: ...viii MS 5000 Multidrop Concentrator User s Manual...
Page 52: ...Chapter 3 Menu Configuration 3 18 MS 5000 Multidrop Concentrator User s Manual 3 Serial Config...
Page 66: ...Chapter 4 Serial Commands 4 14 MS 5000 Multidrop Concentrator User s Manual 4 Operations...
Page 90: ...A 14 MS 5000 Multidrop Concentrator User s Manual Appendices...
