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:
Oct. 11, 1994
Filed:
Apr. 02, 1991
Akihiro Ohhashi, Hitachi, JP;
Tadashi Okamoto, Hitachi, JP;
Makoto Tachikawa, Hitachi, JP;
Takeshi Katoh, Hitachi, JP;
Noboru Azusawa, Katsuta, JP;
Junichi Hamano, Yokohama, JP;
Hitoshi Saitoh, Hitachi, JP;
Hitachi, Ltd., Tokyo, JP;
Hitachi Information & Control Systems, Inc., Hitachi, JP;
Abstract
A process controlling method uses a flowchart language program and ladder programs with an intermediate register to be accessible with the same name by both the flowchart language program and the ladder programs. Each ladder program defines the operation of a machine, including an interlock condition or the like of the machine operation. The flowchart language program defines an automatic operation flow which sequentially activates the ladder programs using the data in the intermediate register. This arrangement allows the flowchart language program to be separated from the ladder programs, thereby improving productivity, serviceability and security of the programs.