User manual

Section 4 - Configuring the Serial Server Vlinx VESR4x4 Serial Server
Page 39 of 70 Manual Documentation Number: VESR4x4-0712m
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Figure 34. VCOM Configuration
Note: Both the serial server and the computer must be configured for VCOM operation. To set up a virtual
COM port on the computer, refer to the section on Adding Virtual COM Ports (see page 47).
1. To enable VCOM operation, select VCOM protocol.
2. Click Save
Setting up Paired Mode Operation
Paired Mode enables two serial servers to operate across the network like a
"wire replacement" between two serial devices. (Paired Mode is also called
serial tunneling.) Serial devices connected to serial servers on each end of the
link can communicate as it they were connected by a serial cable.
For Paired Mode to work one serial server must be configured “to initiate
connections (client)” and the other must be configured “to wait for
connections (server)”
The serial server configured as the client initiates the connection. You must
set up the IP address and port number of the server that you want the client
(serial server) to communicate with. You also select whether you want the
serial server to connect at power up or only when it receives data from the
device connected to its serial port.
The serial server configured as a server waits for a connection to be initiated
by the remote client. You must set up the TCP port number on which it will
listen for connections and set the maximum (up to four) number of
simultaneous connections it will accept. The maximum number of connections
should be set to at least two (2) to allow the unit to recover if the connection
is terminated abnormally. You can filter the connections it will accept based on
specific IP addresses or ranges of IP addresses that you specify.