Rfc2217 Mode; Tcp Server Mode; Tcp Client Mode - Moxa Technologies NPort IA5000A Series User Manual

NPort IA5000A Series
ATTENTION
Real COM Mode allows several hosts to have access control over the same NPort IA5000A. The driver that
comes with your NPort IA5000A controls host access to attached serial devices by checking the host's IP
address. Refer to Accessible IP Settings in Chapter 5 for more details.

RFC2217 Mode

RFC2217 mode is similar to Real COM mode in that a driver is used to establish a transparent connection
between a host computer and a serial device by mapping the serial port on the NPort IA5000A to a local COM
port on the host computer. RFC2217 defines general COM port control options based on the Telnet protocol.
Third party drivers supporting RFC2217 are widely available on the Internet and can be used to implement
Virtual COM mapping to your NPort IA5000A serial port(s).

TCP Server Mode

In TCP Server mode, the NPort IA5000A is configured with a
unique IP:Port address on a TCP/IP network. The NPort
IA5000A waits passively to be contacted by the host
computer, allowing the host computer to establish a
connection with and get data from the serial device. This
operation mode also supports up to eight simultaneous
connections, so that multiple hosts can collect data from the
same serial device—at the same time.
As illustrated in the figure, data transmission proceeds as
follows:
1. The host requests a connection from the NPort IA5000A
configured for TCP Server Mode.
2. Once the connection is established, data can be
transmitted in both directions—from the host to the
NPort IA5000A, and from the NPort IA5000A to the
host.

TCP Client Mode

In TCP Client mode, the NPort IA5000Acan actively establish
a TCP connection to a pre-defined host computer when serial
data arrives.
After the data has been transferred, the NPort can
automatically disconnect from the host computer by using
the TCP alive check time or Inactivity time settings.
Refer to chapter 5 for more details.
As illustrated in the figure, data transmission proceeds as
follows:
1. The NPort IA5000A configured for TCP Client Mode
requests a connection from the host.
2. Once the connection is established, data can be
transmitted in both directions—from the host to the
NPort IA5000A, and from the NPort IA5000A to the
host.
Choosing the Proper Operation Mode
4-3