User's Manual

Brooks Automation
260301 Revision A 61
ATR60LF RFID Reader CAN Bus 7 Operation
Product Manual 7.5 Operation of the 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