User's Manual

Table Of Contents
Product Manual - RFID Reader UF80 45
Chapter 7
Operation
W - Write EPC code The W command starts the writing of the EPC of a present EPC transponder. Only
one EPC transponder may be located in the write area of the antenna when using
this command.
1) The transponder here delivers the EPC code which was previously programmed
as a response.
2) The response of the transponder is optional and only appears at result "00".
Example: Overwrite EPC transponder with a new EPC code
>> M01 (read old EPC code)
<< m000000101060102030405060708090A0BCD
>> W0100000000060102030405060708090A0B0C
<< w000000101060102030405060708090A0BCD8B
>> M01 (read new EPC code)
<< m000000101060102030405060708090A0B0C
Example: Several transponders are in the field; the action is therefore incorrect
>> W0100000000060102030405060708090A0B0C
<< w0000B Result 0x0B
Host reader
CMD Reader ID Head ID Access word EPC
W 1 byte 1 byte 8 bytes (2n+1)*2 bytes
Reader host
Overhead response telegram
Response of the EPC transponder
2)
CMD
Reader
ID
Frame
ID
Result Ex flag Extensions
EPC
1)
Transponder
error code
w 1 byte 2 bytes 2 bytes 2 bytes 0-12 bytes (2n+1)*2 bytes 2 bytes