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:
Feb. 16, 1982
Filed:
Sep. 13, 1979
Keiji Hideshima, Fujisawa, JP;
Haruo Koyanagi, Ome, JP;
Hiroharu Suda, Yokohama, JP;
Hirokazu Sawano, Hitachi, JP;
Masaoki Takaki, Hitachi, JP;
Kunio Yamanaka, Hitachi, JP;
Isao Yasuda, Hitachi, JP;
Kazuyoshi Asada, Hitachi, JP;
Hitachi, Ltd., Tokyo, JP;
Nissan Motor Co., Ltd., Tokyo, JP;
Abstract
A programmable sequence controller is provided with a display signal processor for preparing and correcting a sequence program in combination with a CRT (or cathode ray tube) display device. The signal processor simply effects signal processing of branch points and composition points in case where a so-called 'ladder diagram' constituting the sequence diagram with relay symbols is prepared and displayed. Branch information is stored in an FIFO (or first in first out) register. The branch information is sequentially received and stored, and the information thus stored is read out in the order of storage, thus preparing the ladder diagram. There are provided a register for instructing the FI operation and a register for instructing the FO operation. The sequence display controller is applicable to the cases where a new ladder diagram is to be prepared, the diagram once prepared is corrected, and the operation is checked.