Safety controller providing rapid recovery of safety program data
US7027880B2 · kind B2 · utility
14Cited by
5References
21Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 30, 2003 |
| Grant date | Apr 11, 2006 |
| Priority date | — |
| Expiry date | Sep 7, 2024 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F11/1629
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
Re-certification of a control program loaded in a safety controller is avoided through the use of a digital snapshot and digital signature, the snapshot providing a rapidly loadable memory image file and the signature providing a confirmation that the file loaded matches a previously certified copy so as to avoid the need for time consuming re-certification.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.