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Virtual Serial Server

The Virtual Serial Server mode is used to provide a TCP interface to a serial device. The serial device will then appear as an IP server to an IP client.

Virtual Serial Server

The Virtual Serial Server mode does not require the end points to use a request/response protocol. However, there is one exception. When COM2 is used in the RS-485 two-wire mode then a write to the COM2 port must be followed by a read. The COM2 serial port, in that mode, is therefore the recipient of a request from the IP100 and returns a response to the IP100.

The configuration parameters are:

IP Port IP port number. It is best to use 1024 and above since lower numbers are well-known ports.
COM Port Serial port number in the range 0 to 4.

Example #1: Modbus Slave

In this example one modbus slave is connected to the Internet using an IP100 configured as a virtual serial server. Even though modbus is used in this example the Virtual Serial Server mode can use any protocol.

Modbus Slave

Example #2: Serial via IP

In this example the gui is connected indirectly to ip100 #2.

ip100 #1 has the 'serial via ip' checkbox selected and a virtual serial server connection is configured. The gui uses the ip address and port of ip100 #1 in the ethernet connect dialog box. The gui to ip100 #2 transactions are routed through ip100 #1.

Serial via IP

vserver.txt · Last modified: 2023/08/29 13:32 by byee