IE-CS(T)-2TX-xRS232/485
Choosing the Proper Operation Mode
4-3
ATTENTION
Real COM Mode allows several hosts to have access control over the same IE-CS(T)-2TX-xRS232/485. The
driver that comes with your IE-CS(T)-2TX-xRS232/485 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 IE-CS(T)-2TX-xRS232/485 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 IE-CS(T)-2TX-xRS232/485 serial port(s).
TCP Server Mode
In TCP Server mode, the IE-CS(T)-2TX-xRS232/485 is configured
with a unique IP:Port address on a TCP/IP network. The
IE-CS(T)-2TX-xRS232/485 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
IE-CS(T)-2TX-xRS232/485 configured for TCP Server Mode.
2.
Once the connection is established, data can be transmitted
in both directions—from the host to the
IE-CS(T)-2TX-xRS232/485, and from the
IE-CS(T)-2TX-xRS232/485 to the host.
TCP Client Mode
In TCP Client mode, the IE-CS(T)-2TX-xRS232/485 can
actively establish a TCP connection to a pre-defined host
computer when serial data arrives.
After the data has been transferred, the
IE-CS(T)-2TX-xRS232/485 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 IE-CS(T)-2TX-xRS232/485 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
IE-CS(T)-2TX-xRS232/485, and from the
IE-CS(T)-2TX-xRS232/485 to the host.
