Brooks LF80C - Page 130

Brooks Automation
118 278580 Revision A
7 Operation LF80C ZeniD RFID Reader
7.3 Operation of SECS Protocol Product Manual
S18F5: READ REQUEST (RR) (host -> reader, reply)
The host requests the subsystem indicated in the 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 all
pages of the data area are requested. If only DATALENGTH is omitted, all
data within the indicated section is requested.
S18F6: READ DATA (RD) (reader -> host)
This message is used to return requested information from the subsystem
indicated in the TARGETID or to acknowledge the result of the request.
S18F6
L,3
1. <TARGETID>
2. <SSACK>
3. <DATA>
If the TARGETID is unknown, a communication error (CE) occurs.
S18F7: WRITE DATA REQUEST (WAR) (host -> reader, reply)
This message requests to write data to the subsystem component indicated
in the TARGETID. DATASEG may be used to indicate a specific section of the
data area to be written or overwritten.
S18F7 W
L,4
1. <TARGETID>
2. <DATASEG>
3. <DATALENGTH
4. <DATA>
If DATASEG and DATALENGTH are both omitted (zero length items), then all
data in the data area are to be overwritten. If only DATALENGTH is omitted
or if DATALENGTH has a value of zero, then all data within the indicated
section are to be written.
If DATASEG is omitted (zero length items), the value of DATALENGTH sets
the length of data that is to be written. If the length of the data that is to be
written is longer than the value of DATALENGTH, a communication error
(CE) occurs.