User Manual

Medio P101-Ethernet
32/41 Revision 2.2 April 2008
Table 4: Customized ASCII Message Format (TAGSYS RFID Tag is read)
Start of Text
Header
String
Chip
Description
String
ID
End of
Message
String
End of Text
Description
<STX>
(0x02)
“TAGSYS-“
(Default)
Chip name
<CR/LF>
(Default)
<ETX>
(0x03)
C210 2 to 16 characters
C240 2 to 16 characters
C220 2 to 10 characters
C270 2 to 16 characters
C320 2 to 16 characters
C370 (ISO
15693)
2 to 16 characters
ePC 2 to 24 characters
Size
1
character
0 to 16
characters
0 to 16
characters
UID 2 to 10 characters
0 to 16
characters
1
character
TR-P101 Optional Optional Optional Required Optional Optional
Medio P101-Ethernet reader can decode all chips in Stand-alone mode. Only the ID field is
retrieved in the return ASCII message. All other fields are optional. The ID field length is
programmable; the default lengths are given in Table 5.
Table 5: Default ID Field Lengths
Chip Type Default ID Field Length
C210 chip 16 (Total memory)
C240 chip 16 (Block 0 Page 0)
C220 chip 10 (Lockable memory)
C270 chip 16 (Block 0 and Block 1)
C320 chip 16 (Block 0)
C370 chip (ISO 15693) 16 (UID)
ePC 24 (Block 0 to 11)
UID 10 (UID block 14 to 18)
6.1.2 Repetition Option
The reader constantly attempts to read any chips present in the field. When a chip ID is detected,
the reader can send the information to the host in one of 2 modes:
1. In “Repeated Read” mode, the reader returns a chip’s ID to the host with each successful
read operation.
2. In “Read Once” mode, the reader only returns the ID of a chip if the previous read
corresponds to a different chip, or if all reading attempts have failed 4 times (this feature
makes it possible to detect a chip’s potential exit out of the field).