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:
Jan. 29, 1991
Filed:
Sep. 09, 1988
Applicant:
Inventors:
Setsuo Arita, Hitachiota, JP;
Tetsuo Ito, Hitachi, JP;
Satoshi Suzuki, Mito, JP;
Atomi Noguchi, Hitachi, JP;
Assignee:
Hitachi, Ltd., Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G05B / ;
U.S. Cl.
CPC ...
364187 ; 376215 ; 371 24 ;
Abstract
A multiplex control system has a plurality of control apparatuses, test signal generators provided, respectively, for the control apparatuses for the purpose of internal diagnosis thereof, signal selectors each for selecting a signal to operate a device under control form the signals produced by the control apparatuses, and diagnosis unit each for deciding presence or absence of abnormality in the associated signal selector with the aid of the signals inputted to the signal selector and the output signal therefrom.