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Industrial Ethernet and other TCP communication protocols have become a standard in the industry. Their adoption offers great flexibility when choosing equipment and dramatically facilitates communication between several different devices. It has never been easier to communicate with PLCs or other industrial devices.If you wantwould like to develop a solution to communicate with a Siemens PLC, Snap7 is the ideal tool. It is an open-source package (or library) developed for several languages , such as VB, C++, Java, Python...etc, which allows us to communicate inherently via the S7 protocol (GET/PUT access).In this tutorial, you will learn how to use Snap7 to communicate with an S7 PLC. For this example, we will use Python codes to communicate with a virtual PLC (PLCSim Advanced). Note that the package's operation of the package is the same regardless of the language used. The only difference will be a syntax specific to each language. You can consult the official documentation to see the different syntaxes. The logic, however, will remain the same.

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