Process control system with backup process controller

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

1977-09-13

1979-01-02

Ruggiero, Joseph F.

Boots, shoes, and leggings

2353033, 364200, G06F 1546, G06F 1100

Patent

active

041330277

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 signals 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 controllers whereby the backup controller is directed by the backup director to assume the address of the failed controller. 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.

REFERENCES:
patent: 3303474 (1967-02-01), Moore et al.
patent: 3377623 (1968-04-01), Reut et al.
patent: 3444528 (1969-05-01), Lovell et al.
patent: 3636331 (1972-01-01), Amrehn
patent: 3786433 (1974-01-01), Notley et al.

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