NPort IA5150A/IA5250A Series Web Console Configuration
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: The NPort IA5150A/IA5250A will automatically close the TCP connection if there is no TCP activity
during this given time. After the connection has closed, the NPort IA5150A/IA5250A will start “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.
0-65535 ms: The NPort IA5150A/IA5250A automatically closes the TCP connection if there is no serial data
activity during this given time. After the connection has closed, the NPort IA5150A/IA5250A will start “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 there is no incoming or outgoing data 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 IA5150A/IA5250A will check the connection status
between the NPort IA5150A/IA5250A and remote host by sending “keep alive” packets periodically. If the
remote host does not respond to the packet, the NPort IA5150A/IA5250A assumes that the connection was
closed unintentionally, the NPort IA5150A/IA5250A will then force the existing TCP connection to close.
he Inactivity time should be larger than that of the Force transmit timeout. To prevent unintended
disconnection, it is highly recommended that this value is set l
arge enough so that the intended
data transfer
can be completed.
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