Hierarchical-structure plant control system

Details Hierarchical-structure plant control system Hierarchical-structure plant control system

1980-06-25

1982-08-31

Ruggiero, Joseph F.

Boots, shoes, and leggings

364187, 371 9, G06F 1546, G06F 1516, G06F 1116

Patent

active

043475647

ABSTRACT:
Sub-loop controllers arranged around a microprocessor are assigned to operation terminals to be controlled, and connected to a master controller and a host computer through a system bus to be supplied with a control command therefrom. Analog memories for manual control of the operation terminals are connected to the host computer through a special, common wiring. If one of the sub-loop controllers breaks down, the host computer directly controls the operation terminal by use of this analog memory thereby to back up the sub-loop controller.

REFERENCES:
patent: 3377623 (1968-04-01), Reut et al.
patent: 3636331 (1972-01-01), Amrehn
patent: 3786433 (1974-01-01), Notley et al.
patent: 4123794 (1978-10-01), Matsumoto
patent: 4133027 (1979-01-01), Hogan
patent: 4141066 (1979-02-01), Keiles

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