User`s manual

NPort 6000 Series User’s Manual Introducing Serial Port Operation Modes
4-5
UDP Mode
Compared to TCP communication, UDP is faster
and more efficient. In UDP mode, you can unicast
or multi-unicast data from a serial device to one or
multiple host computers and the serial device can
receive data from one or multiple host computers.
These traits make UDP mode especially suited for
message display applications.
UDP
Ethernet
Directly proceed with
data transmission
(no connection required)
RS-232/422/485
Device
Pair Connection and Secure Pair Connection Modes
In Pair Connection mode, two NPort 6000 servers
work together to remove the 15-meter distance
limitation imposed by the RS-232 interface. One server
is arbitrarily designated the “master” and the other as
the “slave”—it does not matter which is which as long
as there is one of each. One server is connected from
its RS-232 port to the COM port of a PC or another
type of computer, such as a hand-held PDA that has a
serial port; the other server is connected to the serial
device through its RS-232 port.
The two servers are then connected to each other over
the network.
TCP/IP
Ethernet
RS-232/422/485
Device
RS-232/422/485
Device
NPort 6000
Series Slave
NPort 6000
Series Master
Ethernet Modem Mode
Ethernet Modem mode is designed for use with legacy
operating systems, such as MS-DOS, that do not
support TCP/IP Ethernet. By connecting the properly
configured NPort 6000 serial port to the MS-DOS
computer’s serial port, it is possible to use legacy
software to transmit data over the Ethernet when the
software was originally designed to transmit data over
a modem.
TCP/IP
Ethernet
RS-232/422/485
Device
RS-232/422/485
PC
Ethernet Modem
Ethernet Modem