User Manual

“Halo” System: Communication Protocol 970-00002-000
EXI Wireless Systems, Confidential Page 16 of 33 July 27, 1999
4.2.2. ID number format
Three ID bytes carry information about 6 ID characters in the BCD format (Hexadecimal numbers 0 – F) as
presented in the Figure 6a. All ID numbers are generated as sequential decimal numbers with the exception
of the first character which is always the same for the particular type of Tag
The format of the ID numbers for different tags is as follows:
P-Tag ⇒ Cxxxxx
A-Tag ⇒ Axxxxx
D-Tag ⇒ Dxxxxx
Where “xxxxx” is a sequential decimal number.
Figure 5 TIC Alarm
850 ms
2 ms
1 ms
ID 1 ID 3ID 2 CHECKSUM
a)
b)
c)
Figure 6. Format of the ID number
1a 1b 1c 1d 2a 2b 2c 2d 3a 3b 3c 3d 4a 4b 4c 4d 5a 5b 5c 5d 6a 6b 6c 6d
ID BYTE 1 ID BYTE 3ID BYTE 2