User's Manual

Brooks Automation
260301 Revision A 57
ATR60LF RFID Reader CAN Bus 7 Operation
Product Manual 7.5 Operation of the SECS Protocol
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.