Sometimes there is a need to access a remote PLC or other equipment with an RS-485 or RS-232 interface. To solve this problem, you can use the Virtual UART function which is built into WebHMI.

Suppose that we need to update the program in the controller Delta DVP-10SX. It is connected to WebHMI using RS-485.

1. Open the connection settings and change Mode from Normal to Virtual UART.

2. Save changes

After saving, you will see that the specified connection is disabled due to Virtual UART. This means that WebHMI will not work with it until Virtual UART mode is enabled. If this UART is used for other PLCs, they will also be disabled and WebHMI will not be able to work with them. </ P> <p> Also in the list of connections you will see the column Virtual UART. It shows the TCP port number of this UART by which to connect.