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:
Mar. 14, 2000
Filed:
Mar. 17, 1998
Kotaro Shimamura, Hitachi, JP;
Yuuichiro Morita, Hitachi, JP;
Yoshitaka Takahashi, Hitachi, JP;
Takashi Hotta, Hitachi, JP;
Hiroyasu Satou, Hitachi, JP;
Shigeta Ueda, Hitachi, JP;
Akira Bando, Hitachi, JP;
Hirokazu Suzuki, Yokohama, JP;
Koji Sakamoto, Kawasaki, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
A replicated controller and a fault recovery method therefor which can restore a faulty system to a normal state without interrupting operation of an equipment, even in an equipment controller performing processing with short operating periods. In a fault recovery method for a replicated controller, control data is divided into a plurality of blocks on the basis of dependency of the blocks, and a plurality of blocks are transferred in a sequential order of superiority of the dependency from the normally operating system to the faulty system in a period over a plurality of operating periods. BY this, even in an equipment controller performing processing at a short operating period, the system, in which failure is caused, can be restored into normal state without interrupting operation of the equipment.