User's Manual

IPICO Spider User Manual V1.0 draft 20071123 RWD .doc 12/12/2007 Page 17
How to know from which antenna the tag was read:
Record
ID
Receiver
ID Tag ID I-Count Q-Count
Date
(YYMMDD)
Time
(HHMMSS)
100ths
(in Hex) LRC
aa 00 058000add0fa 01 00 070202 115001 12 aa
aa 00 058000abc5a3 01 00 070202 115001 13 e1
aa 00 058000abd035 01 00 070202 115002 00 17
aa 00 058000abbaa6 01 00 070202 115002 01 41
aa 00 058000add984 00 01 070202 115002 01 5d
aa 00
058000abbe87 00 01 070202 115002 02 86
aa 00 058000abf4aa 01 00 070202 115002 02 19
The receiver ID is always 00 for a spider reader. However if desired this can be changed.
The I and Q counts are used to determine which antenna that tag was seen on.
I-Count: If > 0 the Tag is seen on channel 1 of the receiver (top plug)
Q-Count: If > 0 the Tag is seen on channel 2 of the receiver (bottom plug)
Example: The highlighted tag ID “058000abbe87” was read on the Q-channel. This corresponds to the
antenna connected on the bottom plug of the receiver.
On the application software, all the lines that are not starting with “aa” must be ignored. They correspond to
maintenance data.
Further details can be obtained from the iPico Reader Serial Protocol document.
5.6 Date/Time stamp data
When you connect an external switch on the Time stamp input on “Comms & control” connector on the back
plane, the action on the switch will add the following line on the raw data port and in the data files:
ab000a2c070301041413513bd102d0
red is yymmdd (year month day) – i.e. 070301 (1
st
of March 2007)
green is dow e.g. 04 is Thursday
blue is hhmmss (hour minute second) i.e.141351 (14h13mins51s)
pink is 100ths in hex i.e. 3b (in hex) = 59ths (in decimal)