SW5501 – SW5502
Wireless Serial Server
User Manual
Link modes and
Applications
5
Link modes and Applications
5.1
Link Mode Configuration
SW550X Series supports different Link Modes which are TCP Server, TCP Client, and UDP
.
The Link Mode describes
the role of SW550X and the connection between SW550X device and other remote devices in the network
which
would like to communicate with serial devices on SW550X
’
s COM ports
.
Under the three Link Modes, TCP Server
mode can support RAW, Virtual COM, Reverse Telnet, or Pair Connection Master applications, while TCP Client
mode can support RAW, Virtual COM, or Pair Connection Slave applications
.
Note that UDP mode does not have
the same supported applications as the previous two TCP modes
.
Discussion on how to setup different Link Modes properly will be presented in the following sections
.
Figure below
show the Link Mode options for COM 1 port which can be found on COM 1 page
under Serial menu of Web UI
(
See
details on
Serial Settings in Chapter 4.5 above)
.
Figure 5.1
Link Mode Options for COM 1 Port
5.1.1
Link Mode: Configure SW550X as a TCP Server
SW550X Series can be configured as a Transport Control Protocol
(
TCP
)
server in a TCP
/
IP network to listen for an
incoming TCP client connection to a serial device
.
Figure 4
.
2 depicts an example of a PLC
(
serial
)
device which is
connected to SW550X on a serial bus where a remote host computer is sending a request via Ethernet network
.
After the connection is established between the serial device server
(
SW550X
)
and the remote host computer
(
remote TCP client
)
in the figure,
data can be transmitted in both directions
.
This also applies whenever the Virtual
COM
(
VCOM
)
application is running on server mode
.
Please note that this is the SW550X device
’
s default link mode
.
Figure 5.2
An Example of TCP Server Link Mode
