Brooks LF80C - Page 85

Brooks Automation
278580 Revision A 73
LF80C ZeniD RFID Reader 7 Operation
Product Manual 7.3 Operation of SECS Protocol
The system bytes are used to uniquely identify a transaction among the set
of open transactions. The system bytes are also defined as SECS-I-specific.
HSMS message
format summary
* Indicates further specification by subsidiary standards
Value Description Value Description
0 Data message 6 Linktest.rsp
1 Select.req 7 Reject.req
2 Select.rsp 8 Not used
3 Deselect.req 9 Separate.req
4 Deselect.req 10 Not used
5 Linktest.req 11-255 Reserved, not used
Message header
Message type bytes 0 - 1
Session ID
byte 2 byte 3 byte 4
P-type
byte 5
S-type
bytes 6 - 9
System bytes
Message
text
Data
message
*
(no R bit)
W bit and
SECS
stream
SECS
Function
0 0 Primary:
Unique Reply:
Same as
primary
Text
Select req*0001UniqueNone
Select.rsp Same
as.req
0 Select
status
0 2 Same as.req None
Deselect.req*0003UniqueNone
Deselect.rsp Same
as.req
0 Deselect
Status
0 4 Same as.req None
Linktest.req 0xFFFF 0 0 0 5 Unique None
Linktest.rsp 0xFFFF 0 0 0 6 Same as.req None
Reject.req Same as
message
being
rejected
P-type or S-
type of
message
being
rejected
Reason
code
0 7 Same as
message
being
rejected
None
Separate.req * 0 0 0 9 Unique None