Web Console Configuration
TCP Client ModeTCP alive check time
Setting Factory Default Necessity
0 to 99 min 7 min Optional
0 min: TCP connection is not closed due to an idle TCP connection.
1 to 99 min: NPort automatically closes the TCP connection if there is no TCP activity for the given
time.
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: NPort automatically closes TCP connection, if there is no serial data activity for the
given time.
This parameter defines the maintenances 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. NPort will
then force the existing TCP connection to close.
NPort 5400 Series User’s Manual