The present invention discloses a simplified solid state controller for flexible use in controlling many individual watering stations that make up an automatic irrigation system. The operator input panel provides switches the operator can use to initiate a number of parameterization logic sequences for the controller system. Through the input panel, the operator can cause the stored information data to be displayed and to be selectively advanced to a new desired value on a step-by-step basis. When the newly displayed value equals the value desired by the operator, the operator signals the logic of the controller through the input panel and the current, stored value is updated to the displayed value. Once entered, the signals are stored in memory and acted upon automatically at the times specified to activate various individual irrigation valves at the times, and on the days, and for the duration, so stored.