Executing downloaded user programs in a programmable controller

Details Executing downloaded user programs in a programmable controller Executing downloaded user programs in a programmable controller

1989-11-01

1990-11-20

Shaw, Gareth D.

Boots, shoes, and leggings

364136, 364949, 3649491, G06F 906

Patent

active

049723650

ABSTRACT:
A program in a higher-level language for a programmable controller is stored as a hex-coded file in a memory in a main processor unit. The file is downloaded to a processor-based I/O logic module that translates the program into a multi-table data structure for relating the state of output devices on controlled equipment to the state of input devices on the equipment. After translation, an I/O control routine of lower-level, machine-language processor instructions is executed every 500 microseconds to control the output devices in response to changing conditions at the input devices and in response to the output functions embedded in the data structure as a result of translating the downloaded program. In a first embodiment the higher-level language is of the ladder-diagram type, while in a second embodiment the higher-level language incorporates state transition logic.

REFERENCES:
patent: 4176403 (1979-11-01), Suzuki et al.
patent: 4293924 (1981-10-01), Struger et al.
patent: 4413319 (1983-11-01), Schultz et al.
patent: 4442504 (1984-04-01), Dummermuth et al.
patent: 4443865 (1984-04-01), Schultz et al.
patent: 4486830 (1984-12-01), Taylor, Jr. et al.
patent: 4510565 (1985-04-01), Dummermuth
patent: 4566061 (1986-01-01), Ogden et al.
patent: 4608628 (1986-08-01), Saito et al.
patent: 4638452 (1987-01-01), Schultz et al.
patent: 4663704 (1987-05-01), Jones et al.
patent: 4691296 (1987-09-01), Struger
patent: 4716541 (1987-12-01), Quatse
patent: 4742443 (1988-05-01), Rohn et al.
patent: 4751672 (1988-06-01), Yamada
patent: 4802116 (1989-01-01), Ward et al.
patent: 4809217 (1989-02-01), Floro et al.

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