A method and device for the programming and configuration of a programmable logic controller are disclosed. The method can include: locating a configuration tool in a programming tool, wherein the configuration tool includes a module in an IEC61131 language; integrating at least one further module into the configuration tool, and executing the programming and configuration of the programmable logic controller in a high-level language using a C-Code editor, and wherein the at least one further module is configured to provide a definition of interfaces between an IEC61131 code and a high-level language code, and provide a configuration of the high-level language code.