User's Manual

OPERATION 5
77
HF5x Transponder Reader (SECS1-Protocol), Release 1.4
S18F67: READ REQUEST UID (RRU) (host -> reader, reply)
The host requests the subsystem indicated in TARGETID to read
information from the transponder indicated in UID. DATASEG may be
used to indicate a specific section of data to be read. DATALENGTH
is used to limit the amount of data for that section.
S18F67 W
L,4
1. <TARGETID>
2. <UID>
3. <DATASEG>
4. <DATALENGTH>
If DATASEG and DATALENGTH are both omitted (zero length
items) then up to 120 bytes of the data area are requested. If only
DATALENGTH is omitted, then all data within the indicated section
are requested.
S18F68: READ DATA UID (RDU) (reader -> host)
This message is used to return requested information from the
subsystem indicated in TARGETID and the transponder indicated in
UID, or to acknowledge the result of the request.
S18F68
L,3
1. <TARGETID>
2. <SSACK>
3. <DATA>
If TARGETID is unknown, then a communication error (CE) occurs.