Title :
Communication and synchronization aspects of a mixed hardware control and data acquisition system
Author :
Schmidt, V. ; Flor, G. ; Hemming, O.N. ; Luchetta, A. ; Manduchi, G. ; Piacentini, I.E. ; Vitturi, S.
Author_Institution :
Istituto Gas Ionizzati, Padova, Italy
fDate :
10/1/1989 12:00:00 AM
Abstract :
Aspects of the control and data acquisition system of the RFX nuclear fusion experiment are dealt with. The system is built around a local area network that connects programmable controllers, minicomputers with CAMAC front-end, and personal computes as operator consoles. These three types of nodes use compatible software that contains a set of low-level routines corresponding to levels one to four of the ISO OSI (Open Systems Interconnection) recommendations. A detailed description is provided of how the overall system synchronization is achieved. All subsystems (computer and programmable-controller based) follow the same state transition diagram (scheduler) and are coordinated by a supervisor system based on a programmable controller. The solution proposed for the precision timing and waveform generation and its integration with the overall system synchronization are described
Keywords :
computerised control; data acquisition; local area networks; nuclear engineering computing; open systems; programmable controllers; synchronisation; CAMAC front-end; ISO OSI; Open Systems Interconnection; RFX nuclear fusion experiment; communication; local area network; low-level routines; minicomputers; mixed hardware control and data acquisition system; programmable controllers; scheduler; software; state transition diagram; synchronization; timing; waveform generation; CAMAC; Communication system control; Control systems; Data acquisition; Fusion reactors; Hardware; Local area networks; Microcomputers; Open systems; Programmable control;
Journal_Title :
Nuclear Science, IEEE Transactions on
