This Bachelor´s thesis deals with web server which is integrated in the new control units Simatic S7-1200 and S7-1500. Due to this web server it is possible to access PLC through a device with an usual connection to the Internet. Besides standard net pages, which are included in each device from series S7-1200 and S7-1500, there is a possibility for user-defined pages. The goal of this bachelor´s thesis is to create these user-defined web pages and vizualization of a demonstration process. In the first part, there are described generally problems about web server and user-defined pages and possibilities of solution for setting in TIA Portal and for creating web pages with vizualization. In second part, there is shown the realization of web ...