Installation guide

5-6
Host Based / Driver Mode
Setting Value Notes Necessity
TCP data port 950
The TCP port through which data
is sent.
Required
TCP command
port
966
The TCP port through which
commands are sent.
Required
Delimiter 1
(Hex)
ASCII code for
the 1
st
delimiter
Optional
Delimiter 2
(Hex)
ASCII code for
the 2
nd
delimiter
Once the NPort receives both
delimiters through its serial port,
it immediately packs all data
currently in its buffer and sends
it out the NPort’s Ethernet port.
Note: Delimiter 2 is optional. If
left blank, then Delimiter 1 alone
trips clearing of the buffer.*
Optional
blank (or 0)
Disabled.
Force transmit
(ms)
1 – 65535 ms
Forces the NPort’s TCP/IP
protocol software to try to pack
serial data received during the
specified time into the same data
frame.*
Optional
0
TCP connection is never closed
by this device.
TCP alive check
time
1 – 99 min.
TCP connection is automatically
closed by this device if there is no
TCP activity for the given time.
Optional
*
If the size of the serial data received is greater than 1K, the NPort will
automatically pack the data and send it to the Ethernet.
Pair Connection Mode
Pair Connection Mode employs two 1-port NPorts in tandem, and can be used to
remove the 15-meter distance limitation imposed by the RS-232 interface. One
NPort is connected from its RS-232 port to the COM port of a PC or other type
of computer, such as hand-held PDAs that have a serial port, and the serial
device is connected to the RS-232 port of the other NPort. The two NPorts are
then connected to each other with a cross-over Ethernet cable, both are
connected to the same LAN, or in a more advanced setup, they communicate
with each other over a WAN (i.e., through one or more routers). Pair Connection
Mode transparently transfers both data and modem control signals (although it
cannot transmit the DCD signal) between the two NPorts.