NPP APCS diagnostics implementation as a routine task of APCS

In course of works on creation of a perspective NPP (nuclear power plant) APCS (automated process control system) of a new generation, there was developed and is putting in operation a distributed diagnostics system of the NPP APCS. The diagnostic system was unified with regards to its technical solutions including a human-machine interface with the SCADA tools for the APCS. Such a solution enabled one to decrease the APCS time creation, NPP personnel training, and to increase the NPP operation safety. To provide support the unique SCADA in the whole APCS, for the diagnostics purposes there were developed virtual controllers located in NPP APCS LAN (local area network) nodes.There were implemented researches of influence of the active equipment of the NPP APCS LAN on the time of transferring a signal between the source and receiver in the LAN, stability of the time in the APCS. Upon the researches, there were elaborated recommendations on validation of the diagnostic system, algorithms of data processing.