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. 08, 1997
Filed:
Apr. 01, 1994
Tatsumi Yabusaki, Aichi, JP;
Mitsubishi Denki Kabushiki Kaisha, Tokyo, JP;
Abstract
A programmable controller apparatus, and a method for operating a programmable controller apparatus, which does not require a sequence program to initialize the device memory at the start of operation of the programmable controller apparatus. Further, the apparatus and method both allow the contents of the device memory of the programmable controller to be changed at a specified time, during a simulation operation, or when data at a predetermined address of the device memory represents a predetermined value. The programmable controller operates based on the contents of the device memory, and comprises a second memory for sequentially storing data including address data indicating a first address of the device memory and write data to be written to a predetermined number of addresses of the device memory beginning at the first address, and a memory changing device for changing the contents of the device memory in accordance with the data stored in the second memory. The memory changing device changes the contents of the device memory when operation of the programmable controller begins, at a predetermined time, or when a predetermined address of the device memory represents a predetermined value.