Modular programmable controller

Details Modular programmable controller Modular programmable controller

1981-10-21

1984-04-10

Heckler, Thomas M.

Boots, shoes, and leggings

G06F 700, G06F 930

Patent

active

044425040

ABSTRACT:
A programmable controller is formed by connecting separate functional modules to a common backplane bus. A bus arbitration scheme and a message handling technique are disclosed to tightly couple the functional modules together to form an efficient programmable controller. A number of improvements to the CPU module and I/O scanner module are disclosed to further improve the performance of the resulting system.

REFERENCES:
patent: 3686639 (1972-08-01), Fletcher et al.
patent: 3921146 (1975-11-01), Danco
patent: 3942158 (1976-03-01), Dummermuth
patent: 4215397 (1980-07-01), Hom
patent: 4217658 (1980-08-01), Henry et al.
patent: 4249248 (1981-02-01), Yomogida et al.
patent: 4266281 (1981-05-01), Struger et al.
patent: 4307447 (1981-12-01), Provanzano et al.

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