NPort 5200 Series User’s Manual
Web Console Configuration
5-14
If the user wants to send a series of characters in the same packet, the serial device attached to
NPort 5200 should send that series of characters during a time interval less than the Force transmit
timeout for NPort 5200, and the total length of data must be less than or equal to NPort 5200’s
internal buffer size. The serial communication buffer size for NPort 5200 is 1 KB per port.
TCP Server 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 5200 automatically closes the TCP connection if there is no TCP activity for
the given time. After the connection is closed, NPort 5200 starts listening for another host’s TCP
connection.
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.
1-65535 ms: NPort 5200 automatically closes the TCP connection if there is no serial data activity
for the given time. After the connection is closed, NPort 5200 starts listening for another host’s
TCP connection.
This parameter defines the maintenance status as Closed or Listen for the TCP connection. The
connection is closed if data is not incoming or outgoing through the serial port during the specific
Inactivity time.
If the Inactivity time is set to 0, the current TCP connection is kept active until a connection close
request is received. Although Inactivity time is disabled, the NPort 5200 will check the connection
