User's Manual

Product Manual - RFID Reader UF70 Certum 61
Chapter 7
Operation
W – Write EPC code The W command starts the description of the EPC of a present EPC transponder.
Only one EPC transponder should be located in the write area of the antenna
when using this command.
1) The transponder here delivers as a response the EPC code which was
previously programmed.
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
Data of the participating EPC transponders
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