Fault tolerant control system

Error detection/correction and fault detection/recovery – Data processing system error or fault handling – Reliability and availability

Reexamination Certificate

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C714S001000, C714S038110

Reexamination Certificate

active

07840832

ABSTRACT:
A fault tolerant data processing system for controlling a real time process. The system is tolerant to systematic faults in its software. The system includes a data processor unit with a program memory and a data memory and input and output units where program software residing in the program memory can be executed on the data processor unit. The system includes a normal-mode software program residing in the program memory, and a backup-mode software program also residing in the program memory arranged to perform the same or similar function of the normal mode software program but being differently implemented than the normal-mode software program, and where a trigger signal received by the data processor unit can switch execution control such that the normal-mode software program stops executing and the backup-mode software program starts executing.

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Hecht et al; A Distributed Fault Tolerant Architurecture for Nuclear Reactor and Other Critical Process Control Applications; IEEE; 1991; pp. 462-469.
S. Murugesan; Dependable Software Through Fault Tolerance; IEEE; 1989; pp. 391-399.

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