$95 HD/LINKer - Invensys Rail

COMMUNICATIONS TIMERS
Document No.: SIG-00-97-08 Version: C
NOTE
The Server and Client Session fields can be viewed
but not edited from the Circuit Timers dialog box.
The Startup Timer parameters can be edited only
from the HD/LINKer INI file. Refer to Section XIII for a
discussion of HD/LINKer file management.
10.1.2.1 Server Session Retry Rate
At startup, and after a Communications Session failure, the Server sends a Server Alive message to
the Client. This message indicates that the Server is present and responding. The Server Session
Retry Rate specifies the interval between Server Alive messages. The default parameter is 2.0
seconds.
10.1.2.2 Client Session Retry Rate
At startup and after a Communications Session failure, the Client sends an Initialize Session message
to the Server. This message requests the start of a Communications Session. The Client Session
Retry Rate field displays the interval between Initialize Session messages. The Initialize Session
message is repeated until the Communications Session is established, or until the interval set by the
Client Session Attempt TO (time out) parameter is exceeded. The Client Session Retry Rate
default parameter is 2.0 seconds.
10.1.2.3 Client Session Attempt Timeout
The Client Session Attempt Time Out parameter sets the length of time that the Initialize Session
messages is transmitted. The default interval is 4.0 hours.
10.1.3 Synchronization Timers
The Server and Client Time Stamp fields can be accessed from the Clocks tab of the Circuit
Timers dialog box, figure 10-3. To see these fields, double-click on a Termination or Cut
Communications icon in the Communications View.
10-4