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NPort 5110 Series User’s Manual Web Console Configuration
5-19
internal buffer. NPort 5110 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 under Force transmit
timeout.
The optimal Force transmit timeout depends on your application, but it must be at least larger than
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 needed 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 Force transmit timeout to be larger than 8.3 ms, so in this case, it must
be greater than or equal to 10 ms.
If the user wants to send a series of characters in the same packet, the serial device attached to
NPort 5110 should send that series of characters during a time interval less than the Force transmit
timeout for NPort 5110, and the total length of data must be less than or equal to NPort 5110’s
internal buffer size. The serial communication buffer size for NPort 5110 is 1 KB 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 5110 listens to, and that other devices must use to contact NPort 5110. To
avoid conflicts with well known UDP ports, the default is set to 4001.