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:
Apr. 30, 2002
Filed:
May. 24, 2001
Applicant:
Inventor:
Hiroki Sone, Kagamigahara, JP;
Assignee:
Murata Kikai Kabushiki Kaisha, Kyoto, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G05D 1/00 ;
U.S. Cl.
CPC ...
G05D 1/00 ;
Abstract
A distribution computer and a plurality of controllers are connected together via a LAN. One of the controllers acts as a main controller to transmit control from the distribution controller to the controllers . The controllers are duplicated so as to back up one another, and a main programmable controller monitors the controllers to to detect defects. Arc nets are connected together via an RS232C line to communicate the passage of a travelling vehicle between themselves. Even with an extended running path, the present invention hinders a delay in communication and thus a delay in control, thereby preventing system down caused by a defect in a controller.