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Web Console Configuration
Force Transmit
Setting Factory Default Necessity
0 to 65535 ms 0 ms Optional
0: Disable the force transmit timeout.
1 to 65535: Forces the NPort’s TCP/IP protocol software to try to pack serial data received during the
specified time into the same data frame.
This parameter defines the interval during which NPort fetches the serial data from its internal buffer.
If there is incoming data through the serial port, NPort stores the data in the internal buffer. NPort
transmits data stored in the buffer via TCP/IP, but only if the internal buffer is full or if the force
transmit time interval reaches the time specified as Force Transmit timeout.
Optimal force transmit timeout differs according to your application, but it must be at least as large as
one character interval within the specified baud rate. For example, assume that the serial port is set to
1200 bps, 8 data bits, 1 stop bit, and no parity. In this case, the total number of bits required to send a
character is 10 bits and the time required to transfer one character is
10 (bits) / 1200 (bits/s) * 1000 (ms/s) = 8.3 ms.
Therefore, you should set the Force Transmit timeout to be larger than 8.3 ms. Force Transmit timeout
is specified in milliseconds and must be larger than 10 ms.
If the user wants to send a series of characters in a packet, the serial device attached to NPort should
send characters without time delay larger than Force Transmit timeout between characters and the
total length of data must be smaller than or equal to NPort’s internal buffer size. The serial
communication buffer size of NPort is 1 Kbyte per port.
Destination IP address 1
Setting Factory Default Necessity
Begin: Empty
End: Empty
IP address range
E.g., Begin: 192.168.1.1
End: 192.168.1.10
Port: 4001
Required
Destination IP address 2/3/4
Setting Factory Default Necessity
Begin: Empty
End: Empty
IP address range
E.g., Begin: 192.168.1.11
End: 192.168.1.20
Port: 4001
Optional
Local listen port
Setting Factory Default Necessity
1 to 65535 4001 Required
The UDP port that NPort listens to, and that other devices must use to contact NPort. To avoid conflicts
with well known UDP ports, the default is set to 4001.
NPort 5400 Series User’s Manual
5-21