User's Manual

Product Manual - RFID Reader UF70 Certum 49
Chapter 7
Operation
The filter bits required for the development of a filter are defined in HEX format in
a filter mask. That is, two ASCII characters in the message equal one byte of data
in HEX format. The LSB byte of the filter mask is transmitted first.
Example: N=3
Number of mask bits: 18
Filter mask: "0x03FEFE"
Transmission: "FEFE03"
The filters defined for filtering are numbered consecutively from 0 to 31.
Values:
"00" – Filter 0
…
"1F" – Filter 31
The response of the reader can be accomplished in several frames (e.g. if many
transponders were scanned). The frame ID that is sent indicates how many
response messages follow. Short responses that consist only of a single frame
then always have the frame ID "00". Messages consisting of multiple frames
should be fully received and assembled by the host before they are processed.
The data are interpreted in HEX format. That is, two ASCII characters in the
message equal one byte of data in HEX format.
Number of the antenna port (0 – 4).
"0" read on all antenna ports
"1"-"4" single antenna port
Filter mask N* 2 bytes
Filter number 2 bytes
Frame ID 2 bytes
Head ID 1 byte