User's Manual

Brooks Automation
56 260301 Revision A
7 Operation ATR60LF RFID Reader CAN Bus
7.5 Operation of the SECS Protocol Product Manual
7.5.3 HSMS Option
The hardware version with an Ethernet interface uses the HSMS protocol. It
works as a HSMS server. That means that it waits for a connection inquiry
of any HOST PC.
TCP/IP: IP address xxx.xxx.xxx.xxx Port 3241
If a connection inquiry of any HOST takes place, the reader initializes the
HSMS connection, and the SECS-II messages defined in the message set
are forwarded from the reader to the respective HOST and vice versa.
It is possible to operate all readers connected to the network via one or
several HOST PCs.
But one HSMS reader can only be connected to one HOST at a time.
Use the Brooks Device Discoverer to change the TCP/IP settings.
7.5.4 HSMS Implementation
HSMS defines the procedure for all message exchanges between entities
across the TCP/IP. The HSMS Connection Status Diagram - The HSMS
status machine is illustrated in the diagram below. The behavior described
in this diagram defines the basic requirements of HSMS:
A - NOT CONNECTED
The entity is ready to listen for or to initiate TCP/IP connections, but either
has not yet established any connections or all previously established TCP/IP
connections have been terminated.
CONNECTED
A TCP/IP connection has been established. This status has two sub-
statuses, NOT SELECTED and SELECTED.
B - NOT SELECTED
A sub-status of CONNECTED in which no HSMS session has been
established or any previously established HSMS sessions have ended.