Process control system with backup process controller

Details Process control system with backup process controller Process control system with backup process controller

G - Physics

06

F

341/112, 354/225

G06F 11/00 (2006.01) G05B 9/02 (2006.01) G05B 15/02 (2006.01)

Patent

CA 1114514

ABSTRACT A process control system having a plurality of process controllers each connected to a data highway to receive and send process control data is controlled by a backup director receiving input signal from each of the plurality of process controllers to sense the operability thereof. A backup controller is also connected to the data highway and has its highway address controlled by the backup director in response to a failure of one of the regular process con- trollers whereby the backup controller is directed by the backup director to assume the address of the failed con- troller. The data highway interface circuits of the failed controller are concurrently disabled whereby the backup controller provides a substitute for the full operation of the failed controller.

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