Westermo EDW-100 - Manual (Page 31)

31 6616-2203
Point to point using UDP connection
Communication one to many using TCP
Description
In a point to point application the EDW-100 can be to replace or extend a cable link. The distance
between the EDW-100 units is only limited by the size of the LAN. Data can be sent across
the network using ether UDP or TCP. A typical application would be a SCADA or Data logging
application interrogating a sensor or PLC. To understand the differences between a UDP and TCP
please see page 16–17.
IP address:port = Com X
IP address:port = Com Y
IP address:port = Com Z
Virtual IP
Description
Many legacy software applications do not have any facilities to directly use Ethernet but there is a
requirement to use a newly installed or existing LAN to communication to many serial devices. This
problem is solved by installing a serial port redirection software on the host PC. The redirection
software works by creating virtual serial ports on the computer. The Virtual serial port can be
selected and use in the same way as a hardware based port. The serial redirection software will
encapsulate the serial data in a TCP/IP and send it to the relevant EDW-100 device. The EDW-100
will then strip off the TCP/IP frame and just forward the serial data to the target device. In th e
reverse direction the EDW-100 will encapsulate the data and the serial redirection software will
strip off the TCP/IP frame. The serial redirection software can create up to 255 serial comms ports
on a single computer.
Network
Network