Brooks Automation
278580 Revision A
69
LF80C ZeniD RFID Reader
7 Operation
Product Manual
7.3 Operation of SECS Protocol
B - NOT SELECTED
A sub-status of CONNECTED in which no HSMS session has been
established or any previously established HSMS sessions have ended.
C - SELECTED
A sub-status of CONNECTED in which at least one HSMS session has been
established. This is the normal "operating" status of HSMS: data messages
may be exchanged in this status.
The specification of a required TCP Application Program Interface (API) for
use in implementations is outside the scope of HSMS. An HSMS
implementation may use any TCP/IP API sockets, TLI (Transport Layer
Interface), etc.
#
Current
status
Trigger
New
status
Comment
1
...
Local entity-specific
preparation for TCP/
IP communication
Not
connected
Action depends on connection
procedure to be used: active or
passive.
2
Not connected
A TCP/IP connection
is established for
HSMS
communication.
Connected -
Not selected
None
3
Connected
Breaking of TCP
connection
Not
connected
HSMS only permits termination of
the connection when the connection
is in the Not selected sub-status.
4
Not selected
Successful
completion of HSMS
Select procedure.
Selected
HSMS communication is now fully
established: data message
exchange is permitted.
5
Selected
Successful
completion of HSMS
Deselect or
Separate.
Not selected
This transition normally indicates
the end of HSMS communication;
an entity would immediately
proceed to break the TCP/IP
connection.
6
Not selected
T7 connection
timeout
Not
connected
There is a time limit on how long an
entity is required to remain in the
Not selected status before either
entering in Selected status or
returning to Not connected status.
