Owner's manual

Section 8 - Description of Serial Server Properties Vlinx VESR4x4 Serial Server

Page 54 of 66 Manual Documentation Number: VESP211-5011m

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The MAC Address is a hardware level address of the serial server that cannot

be changed. It is assigned in the factory. Every Ethernet device manufactured

has its own unique MAC address. The MAC address of each serial server is

printed on the device's label. The MAC address of each device is shown in the

Serial Server Information Table. The MAC address of the currently selected

serial server is also displayed on the Login page of Vlinx Manager.

The Model number of the currently selected serial server is displayed on the

Network Protocols available for use on VESP211 serial servers include TCP,

UDP, VCOM and Paired Mode.

Network Watchdog controls the duration of network inactivity when a

network connection is determined idle and causes the connection to be forced

closed. The range is 1 through 65535 milliseconds.

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 as a TCP

server and the other as a TCP client.

 The serial server configured as the TCP client initiates connections. 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 TCP server waits for connections to be

initiated by another network device. You must set up the TCP port

number on which it will listen for connections and set the maximum (up

to eight) number of simultaneous connections it will accept. You can filter

the connections it will accept based on specific IP addresses or ranges of

IP addresses that you specify.

Password. When you first receive the VESP211 serial server from the factory

the password is blank so that you can initially access the serial server without

entering a value into this field. To ensure security you should create and save

a password the first time you configure the serial server. After a password has

been set up it must be entered each time you login to Vlinx Manager. The

password is used to access the configuration pages from the Vlinx Manager

Serial Interface Modes. Four serial interface modes of operation are:

 RS-232 - Point-to-point serial communications connection used by PC

COM ports and many other systems. Capable of baud rates up to 115.2