Abstract: The invented controller tuning method relies on the following procedure. To the controlled system with known proportional gain the integral type controller is connected in series. The controller gain kl is increased to get the closed loop system to the stability limit. At this stage the controller ultimate gain ku and the sustained oscillation period period Tosc of the controlled value are assessed. It is assumed that the controlled system dynamics can be approximated by the first order filter with dead time model. The following formulas allow to estimate the first order filter time constant F(1) and the coefficient ?=L/T=(arcctg(?oscT))/(?oscT) where L is the dead time constant of the controlled system model. From the formulas: F(2) the controller model parameters are calculated.