27
May ’00
Chapter 2. Commands
to the PC. The meaning of the status characters is:
0
-
The transponder has been correctly programmed.
1
-
The identification received from the transponder is different to
the identification transmitted.
2
-
The TIRIS reader did not receive any identification from the
transponder for comparison.
Because the programming cycle is longer than the normal reading cycle, the TIRIS
reader during programming could interfere with other Readers in the area, even if
they have been synchronized.
The distance over which the transponder can be programmed is less than the read-
ing distance. This is due to the higher power consumption of the transponder's IC
during programming. If the transponder is not sufficiently charged-up, the program-
ming will not take place.
Example: Comment
PC --> Reader:
P
Reader --> PC:
P
PC --> Reader:
FEDCBA9876543210
The hexadecimal number that must be pro-
grammed into the transponder
Reader --> PC:
0<CR><LF>
Successful programming
or
1<CR><LF>
Received identification is different to transmit-
ted identification
or
2<CR><LF>
No read
Note:
If more than one transponder are in the field of the antenna it could
happen that they are all programmed with the same number. If this
happens and more than one transponder return the same identifica-
tion at the same time (or the transmission is corrupted) the TIRIS
reader will indicate that the programming failed even though at least
one transponder was correctly programmed.
