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
*
0
0
0
1
Unique
None
Select.rsp
Same
as.req
0
Select
status
0
2
Same as.req
None
Deselect.req
*
0
0
0
3
Unique
None
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
