User's Manual

Product Manual - RFID Reader UF70 Certum 79
Chapter 7
Operation
UAX – Polling Read
Data
The UAX command starts the asynchronous read (polling) of a defined data range
of EPC transponders at the respective antenna port. The polling read data is
executed as long as it is not ended or a reset is executed. Transponder messages
only appear if EPC transponders are actually moved in the field. The polling is
briefly stopped for intermediate read requests and is continued after the action.
1) These data are displayed in the order listed for each identified EPC
transponder.
2) Data of the transponder are optional; they appear only at transponder error
code "00".
Example: Read EPC (memory bank 01, address 02000000, length 06)
>> UAX0100000000010200000006
<< uax000
Polling successfully initiated
<< uax000
<<
uax0FF010106BBCC99AA77885566334411220006112233445566778899AABBC
C
<< uax000010106BBCC99AA77885566334411221100
<<
uax0FF010106BBCC99AA77885566334411220006112233445566778899AABBC
C
Host reader
CMD Reader ID Head ID Access word
Memory
bank
Memory
address
Number of
data words
UAX 1 byte 1 byte 8 bytes 2 bytes 8 bytes 2 bytes
Reader  host (confirmation)
CMD Reader ID Result
uax 1 byte 2 bytes
Reader  host (transponder message)
Overhead response telegram Data of the EPC transponder
CMD Reader ID Direction Ex flag Extensions EPC
Reading
cycles
1)
uax 1 byte 2 bytes 2 bytes 0-12 bytes (2n+1)*
2 bytes
2 bytes