The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 21, 1988
Filed:
Jun. 10, 1985
Hitachi, Ltd., Tokyo, JP;
Abstract
In a sequence controller, a sequence program store device includes an instruction store unit for writing a specific instruction dedicated to the sequential control and a plurality of latch circuits respectively associated with the outputs from an output unit. The latch circuits are controlled by a signal from a processing device which periodically calls and processes the program from the store device and executes a specific output processing when external input signals satisfy a logical state set by the program; the latch circuits, if a transition condition of the program is satisfied when the specific instruction is processed, retain an output state of the output unit until the next transition condition is satisfied, and release the state retaining the output state before the next transition condition is satisfied.