User's Manual

OPERATION 5
71
HF5x Transponder Reader (SECS1-Protocol), Release 1.4
S18F5: READ REQUEST (RR) (host -> reader, reply)
The host requests the subsystem indicated in TARGETID to read
information. 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.
S18F5 W
L,3
1. <TARGETID>
2. <DATASEG>
3. <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.
S18F6: READ DATA (RD) (reader -> host)
This message is used to return requested information from the
subsystem indicated in TARGETID, or to acknowledge the result of
the request.
S18F6
L,3
1. <TARGETID>
2. <SSACK>
3. <DATA>
If TARGETID is unknown, then a communication error (CE) occurs.