The Siemens company introduced a new type of S7-1200 controllers to the market.The Siemens company introduced a new type of S7-1200 controller to the market. It is a controller family which is supposed to replace its predecessor - the S7-200, but having much more processing power with additional functions and a built in Ethernet (ProfiNet) interface. The main emphasis while designing this system was put on making the communication of SIMATIC HMI operator panels and SIMATIC S7-1200 controllers as efficient as possible, in regard to the efficiency of data transfer as well as the ease and intuitiveness of application design.