Distributed programmable control system

Details Distributed programmable control system Distributed programmable control system

1975-06-25

1977-04-05

Sprague, Kenneth W.

Furnaces

Fuel feeders

Feeder responsive to fuel bed height

236 14, 431 24, 122448R, F23K 300, F23N 100

Patent

active

040155480

ABSTRACT:
A plurality of first logic processors are interconnected in a "ring" type network and individually exercise control over similar equipment group subsystems which individually contribute to the operation of an overall system. Each of the interconnected processors, in addition to its primary control function, monitors the safety of operation of the equipment group with which associated and the safety of operation of a "neighboring" equipment group. Redundant safety checks are thus performed on each equipment group and any discrepancies in the results of such safety checks are enunciated. A pair of further logic processors, in addition to performing other control functions including scheduling the operation of the individual equipment groups, redundantly check the safety of operation of the overall system.

REFERENCES:
patent: 3244898 (1966-04-01), Hickox
patent: 3258053 (1966-06-01), Schuss
patent: 3395657 (1968-08-01), Schuss
patent: 3684423 (1972-08-01), Bryant
patent: 3849056 (1974-11-01), Schuss

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