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. 11, 2011
Filed:
Jun. 03, 2008
Makoto Itoi, Chiyoda-ku, JP;
Kenichi Iwata, Chiyoda-ku, JP;
Makoto Itoi, Chiyoda-ku, JP;
Kenichi Iwata, Chiyoda-ku, JP;
Mitsubishi Electric Corporation, Tokyo, JP;
Abstract
An input processing unit of safe digital controller includes units for determining ground when a voltage V from an input terminal is equal to or lower than a ground determination value; for outputting a first specified value regardless of the voltage V during a first given period immediately after the controller starts; for outputting a value based on the voltage V when the voltage V is equal to or higher than the ground fault determination value and equal to or lower than a disconnection determination value after the first given period, outputting a third specified value during a second given period after the first given period when the voltage V is lower than the ground fault determination value, and outputting the first specified value when a state in which the voltage V is lower than the ground fault determination value is maintained for the second given period or longer; and for outputting a second specified value during the second given period when the voltage V is higher than the disconnection determination value after the first given period, and outputting the first specified value when a state in which the voltage V is higher than the disconnection determination value is maintained for the second given period or longer.