Programmable sequence controller

Details Programmable sequence controller Programmable sequence controller

1978-06-20

1979-11-27

Springborn, Harvey E.

Boots, shoes, and leggings

G06F 700, G06F 702

Patent

active

041764030

ABSTRACT:
A programmable sequence controller wherein in accordance with a sequence program read out from a memory, a logic operation circuit tests a logical value supplied from an input converter connected to an external input element and generates an output command signal based upon the result of the test. The output command signal is stored in an output memory which has two storage addresses for each external output element, each storage address corresponding to a particular memory storage element addressed by the sequence program. A gate circuit is connected to these two memory storage elements and inhibits the application of an output command signal from one of the memory storage elements to an output converter when the gate circuit receives a logical value from the input converter. When receiving an output command signal from the other of the two memory storage elements the gate circuit then applies this signal to the output converter. Thus, an output element connected to the output converter is energized immediately in response to the operation of an input element.

REFERENCES:
patent: 3701113 (1972-10-01), Chace et al.
patent: 3810104 (1974-05-01), Markley
patent: 4011544 (1977-03-01), Cherrey

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