Programmable controller with function chart interpreter

Details Programmable controller with function chart interpreter Programmable controller with function chart interpreter

1985-03-28

1988-05-03

Shaw, Gareth D.

Boots, shoes, and leggings

G05B 1900

Patent

active

047424435

ABSTRACT:
A programmable controller stores a user control program which is comprised of a plurality of conventional ladder programs and a structure chart program. A microprocessor executes a structure chart interpreter routine to interpret the structure chart program and to thereby create an active state list which indicates the ladder programs that are to be executed. The same microprocessor with the assistance of a bit processor also executes the ladder programs which are indicated on the active state list to control a machine connected to the programmable controller.

REFERENCES:
patent: 3810104 (1974-05-01), Markley
patent: 4038533 (1977-07-01), Dummermuth et al.
patent: 4149235 (1979-04-01), Froyd
patent: 4162536 (1979-07-01), Morley
patent: 4228495 (1980-10-01), Bernhard et al.
Draft of Approved French Standard--Sep., 1981.
International Electrotechnical Commission--Preparation of Function Charts for Control Systems--Jan., 1982.
International Electrotechnical Commission--Standard for Programmable Controllers--Part 3: Programming Languages--Nov. 1984.
"Programmable Controller Functions are Enhanced by Structural Programming", Control Engineering, Feb., 1984.
"A Program Development Tool for the Entire Automation Staff", published by Siemens, date unknown.
"Controller Combines Computer and Programmable Control Functions", Control Engineering, Nov. 1984.
"Data PCs From Maxitron--Conceptual and Technical Perspectives", brochure published in 1985.

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