VESR424D Serial Server
17
VESR424D SERIAL SERVER OPERATIONAL CONNECTIONS
The VESR424x Serial ServerD can operate in Direct IP, Virtual COM Port and Paired Modes.
In
Direct IP Mode,
applications can use TCP/IP socket connections or UDP/IP datagrams to
communicate with the COM ports on the serial server. In this type of application, the serial
server is configured as a TCP or UDP server. The socket program running on the PC
establishes a communication connection with the serial server. The data is sent directly to and
from the serial port on the server.
Figure 14. Direct IP and Virtual COM Port Connection
In
Virtual COM
Port Mode,
the serial ports on the serial server appear to applications running
on the host PC as if the serial ports were physically located on the host PC. When a virtual
COM port is configured on the PC (using Vlinx Manager), a new COM port appears in the
Device Manager. Windows programs are able to interface to the virtual COM port using
standard Windows API calls. When a program on the PC opens the new COM port, it
communicates directly with the remote serial device connected to the serial server.
In
Paired Mode
, two serial servers are used to provide a virtual cable connection between two
remote serial devices using the Ethernet network. The end serial devices communicate data
and handshake information directly, as if they were physically connected in a point-to-point
serial connection. Paired Mode devices are set up as shown in the following diagram and
configured using Vlinx Manager Software or web interface.
