User's Manual

Table Of Contents
Product Manual - RFID Reader UF70 Certum 94
Chapter 7
Operation
UCN – Activate
polling NXP-
UCODE-G2X Reset
Read Protect
The UCN command starts the asynchronous transponder function (polling
operation) "ResetReadProtect" of all NXP-UCODE-G2X transponders in the field at
the respective antenna port. The polling "ResetReadProtect" is executed as long
as it is not ended or a reset is executed.
Transponder messages only appear if NXP-UCODE-G2X 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.
Example:
>> UCN0100000000
<< ucn000
<< ucn0FF0101060B0C090A070805060304112200
Host reader
CMD Reader ID Head ID Access word
UCN 1 byte 1 byte 8 bytes
Reader host (confirmation)
CMD Reader ID Result
ucn 1 byte 2 bytes
Reader host (transponder message)
Overhead response telegram
Data of the participating EPC transponders
1)
CMD
Reader
ID
Direction Ex flag Extensions EPC
Transponder
error code
ucn 1 byte 2 bytes 2 bytes 0-12 bytes (2n+1)*2 bytes 2 bytes