Industrial Automatic Control Systems and Controllers Annotation << Back Self-diagnostic Three-channel Programmable Logical Controller with Hybrid Reservation V.N. Rusanov The achievement of a fundamentally high level of reliability, fault tolerance and radiation resistance of on-board computers depends largely on the principle of construction and technical solutions in a part of a structural and algorithmic organization. This article discusses a three-channel self-identifi ed programmable logic controller with hybrid reservation and shows the technical possibility of its creation on a modern domestic element base. The controller is able to provide at the same time qualitatively high reliability, increased fault tolerance, radiation resistance, as well as the short-range connection of the backup channel compared to the “cold” reservation. Keywords: reserved logical controller; nuclear power plant; reservation; reliability; fault tolerance; radiation resistance; self-diagnosis. DOI: 10.25791/asu.3.2022.1353 Pp. 18-24.