NPort 5600 Series User’s Manual
Web Console Configuration
5-19
TCP Client Mode
TCP 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 unless there’s
no 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.
