Visualization of the control system was created in WinCC 6.2. The application consists of four windows (Fig. 4). An operator can switch over windows by the help in the menu. The main window is divided into four parts, panels. Panel Control is at the top in the middle and allows controlling the tuning procedure. On the right side there is a panel for identification parameters of the controlled system. Visualization of the closed loop values is placed at the bottom panel. There are set point, process value, manipulated value and value in the test and directly mode (manual value). On the left side there is a panel where P, I and D constants and limits for manipulated values for identification are shown.