User`s manual

NPort S8000 Series Basic Settings and Device Server Configuration
5-18
TCP Client Mode
Port Settings
Inactivity time
Setting Factory Default Necessity
0 to 65535 ms 0 ms Optional
0 ms: TCP connection is not closed due to an idle serial line.
0-65535 ms: The NPort automatically closes TCP connection, if there is no serial data activity for the given
time.
This parameter defines the maintenance status as Closed or Listen on the TCP connection. The connection is
closed if there is no incoming or outgoing data through the serial port during the specific Inactivity time.
If the value of inactivity time is set to 0, the current TCP connection is maintained until there’s connection close
request. Although the inactivity time is disabled, the NPort will check the connection status between the NPort
and remote host by sending “keep alive” packets periodically. If the remote host does not respond to the
packets, it treats the connection as being down unintentionally. The NPort will then force the existing TCP
connection to close.
ATTENTION
T
he Inactivity time should at least be set larger than that of Force t
ransmit timeout. To prevent the unintended
loss of data due to the session
being disconnected, it is highly recommended that this value is
set large enough
so that the intended data transfer is completed.