Hierarchical-structure plant control system

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

G - Physics

05

B

342/21, 341/38,

G05B 15/02 (2006.01)

Patent

CA 1137194

ABSTRACT OF THE DISCLOSURE Sub-loop controllers arranged around a micro- processor 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.

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