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:
Nov. 15, 2011
Filed:
Feb. 04, 2010
Hideharu Yajima, Tokyo, JP;
Satoshi Kitamura, Tokyo, JP;
Senji Watanabe, Tokyo, JP;
Masafumi Kisa, Tokyo, JP;
Kazushi Sakamoto, Tokyo, JP;
Hiroyuki Takizawa, Tokyo, JP;
Kuniharu Akabane, Tokyo, JP;
Yoshinori Kobayashi, Tokyo, JP;
Kenji Habaguchi, Tokyo, JP;
Kiyotaka Kozakai, Tokyo, JP;
Mitsuhiro Kurono, Tokyo, JP;
Hiroaki Nakajima, Tokyo, JP;
Hideharu Yajima, Tokyo, JP;
Satoshi Kitamura, Tokyo, JP;
Senji Watanabe, Tokyo, JP;
Masafumi Kisa, Tokyo, JP;
Kazushi Sakamoto, Tokyo, JP;
Hiroyuki Takizawa, Tokyo, JP;
Kuniharu Akabane, Tokyo, JP;
Yoshinori Kobayashi, Tokyo, JP;
Kenji Habaguchi, Tokyo, JP;
Kiyotaka Kozakai, Tokyo, JP;
Mitsuhiro Kurono, Tokyo, JP;
Hiroaki Nakajima, Tokyo, JP;
Yokogawa Electric Corporation, Tokyo, JP;
Abstract
There is provided a duplexed field controller. The duplexed field controller includes: first and second control units between which a control authority is switchable; a first application clock that is updated based on a reference clock so as to define a timing of an application operation of the first control unit; a second application clock that is updated based on the reference clock so as to define a timing of an application operation of the second control unit; and an update control unit that bypasses the first update of the second application clock after switching of the control authority, if the first application clock is ahead of the second application clock when the control authority is switched from the first control unit to the second control unit.