Programmable controller unit and method of automatically restoring memory
US7243260B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Dec 26, 2003 |
| Grant date | Jul 10, 2007 |
| Priority date | — |
| Expiry date | Apr 27, 2025 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG05B2219/14085
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
A unit for a programmable controller includes a user program memory storing a user program to be read out for carrying out a calculation process and a backup memory storing data with the same contents as the user program stored in the user program memory. An abnormality detector is provided for detecting a memory abnormality by comparing user data stored in the user memory and the backup memory while the programmable controller is operated. If a memory abnormality is detected, a restoration device repairs the data at the position where the abnormality was detected with the data at the corresponding position of the backup memory and the cyclic operation of the programmable controller is continued thereafter.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.