User's Manual

Table Of Contents
Product Manual - RFID Reader UF80 36
Chapter 7
Operation
If and which extensions are transmitted for each detected EPC transponder is
defined by the Ex flag. The data are interpreted in HEX format. This means that
two ASCII characters in the message equal one byte of data in HEX format. The
activated extensions are transferred in the following order:
2 ASCII characters antenna port
2 ASCII characters RSSI value
8 ASCII characters time stamp (number of ms that have passed since
the start of the reader, the LSB byte is transferred
first)
4 ASCII characters protocol word PC of the transponder
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. This means that two ASCII characters in
the message equal one byte of data in HEX format.
Gateway address of the network setting with a size of 4 bytes.
The data are in HEX format. This means that two ASCII characters in the message
equal one byte of data in HEX format.
Example:
Subnet address 255.255.254.0
0xFF 0xFF 0xFE 0x00
ASCII string "FFFFFE00"
Number of the antenna port (always 1 for this device). The Head ID is part of the
protocol, because it is also used for other devices with several antenna ports.
Extensions 0 to 12 bytes
Frame ID 2 bytes
GW-ADR 8 bytes
Head ID 1 byte