NPort IA5150/5250 Series User’s Manual
Web Console Configuration
5-21
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 IA5150/5250 should send that series of characters during a time interval less than the Force
transmit timeout for NPort IA5150/5250, and the total length of data must be less than or equal to
NPort IA5150/5250’s internal buffer size. The serial communication buffer size for NPort
IA5150/5250 is 1 KB per port.
Destination IP address 1
Setting
Factory Default
Necessity
IP address or Domain Name
(E.g., 192.168.1.1)
None Required
Allows NPort IA5150/5250 to connect actively to the remote host whose IP address is set by this
parameter.
Destination IP address 2/3/4
Setting
Factory Default
Necessity
IP address or Domain Name
(E.g., 192.168.1.1)
None Required
Allows NPort IA5150/5250 to connect actively to the remote host whose IP address is set by this
parameter.
ATTENTION
Up to 4 connections can be established between NPort IA5150/5250 and hosts. The connection
speed or throughput may be low if one of the four connections is slow, since the 1 slow
connection will slow down the other 3 connections.
ATTENTION
The “Destination IP address” parameter can use both IP address and Domain Name. For some
applications, the user may need to send the data actively to the remote destination domain name.
Designated Local Port 1/2/3/4
Setting
Factory Default
Necessity
TCP Port No.
5011
(Port 1)
5012
(Port 2)
5013
(Port 3)
5014
(Port 4)
Required
