How does Siemens PLC communicate with the host computer via the Internet?

You can use the Siemens WINCC software, or use third-party software such as GE's iFIX to establish an OPC server and PLC connection C communication via SIMATIC NET PC SOFTWARE.

Configuration of communication between OPC server and PLC S7

1) Configure the hardware rack of the PC station

Once the SIMATIC NET software is installed, click on the Station Configurator shortcut on the desktop or the icon in the taskbar.

Select the 1# slot, click the Add button, select OPC Server in the Add Components window and click OK.

Select the 3# slot, click the Add button, select IE General in the Add Components window, and click Properties to view the network parameters (double-click IE General in the Station Co nfiguration Editor to set the network parameters).

Click the Station Name button, specify the PC station name, and click OK to complete the hardware configuration of the station.

2) Configuration and use of the configuration console (Co nfiguration Console)

Open the configuration console Start_SITMATIC—SIMATIC NET—Co nfiguration Console

The Co nfiguration Console is the core tool for configuration setup and diagnostics for PC hardware configuration and configuration and diagnostics of PC applications. After correctly completing the hardware configuration of the PC station, you can see that the IE General mode is switched from PG mode to Co nfigured mode, and the slot number (Index) automatically points to 3.

In the Access Points Settings window, point the S7ONLINE double-click setting to PC internal(local). This setting prepares for the download of the PC station configuration.

3) Configuring PC Station in SIMATIC NET due to word limit

4) Configuration download is omitted due to word limit