Automatic sensor assignment of a supermarket refrigeration system

Wrong sensor assignment is a major source of faults in industrial systems during the commissioning phase. In this paper a method for automatic sensor assignment based on active diagnosis is proposed. The active diagnosis method is developed for diagnosis of linear hybrid systems. It generates the appropriate test signal which can be used for sanity check at the commissioning phase. It could also be used for faster detection of faults during the normal phase of operation or for detection of faults which are impossible to detect by passive methods because of regulatory actions of the controller. The method is tested on a supermarket refrigeration system.