Distributed logic control system and method

Details Distributed logic control system and method Distributed logic control system and method

1990-12-19

1993-02-23

Smith, Jerry

Boots, shoes, and leggings

364141, 364147, 364183, 364184, 364185, G06F 1546

Patent

active

051896044

ABSTRACT:
A system and method for controlling operation of a plurality of elements in an automated process, such as a production process, and indicating error conditions as they occur. Each unique set of input and output conditions of the various system elements defines a unique logic state or zone. Thus, there are defined a multiplicity of valid system logic states or zones, each having a unique input/output image. A predetermined sequence of zones, productive zones representing designed machine operations, is stored in a zone table. All zones not explicitly defined in the zone table are automatically treated as error zones. A zone engine automatically cycles to observe any change in input/output image. Any change in inputs from the various system elements automatically transfer action to the unique zone associated with such inputs, resulting in corresponding changes in control outputs to the system elements and/or display an error message as appropriate.

REFERENCES:
patent: 3795916 (1974-03-01), Wallace et al.
patent: 4314329 (1982-02-01), Crewe et al.
patent: 4608628 (1986-08-01), Saito et al.
patent: 4723219 (1988-02-01), Beyer et al.
patent: 4858102 (1989-08-01), Lovrenich
O'Connor, Alan Joseph, "A CRT-Based State Transition Language for Industrial Sequential Control", Jun. 1981.
Walker, G. R., "The Formal Specification and Control of Sequential Processes Using the State Method", Jun. 1978.
Wolfe, P. P., "A Computer Language for Control of Autonomous Industrial Equipment", Jun. 1973.
"State Transition Synthesis for Sequential Control of Discrete Machines", Hopkins, Jr. et al, '73.

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