Method and apparatus for converting multichannel messages into a single-channel safe message
US7945818B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 18, 2007 |
| Grant date | May 17, 2011 |
| Priority date | — |
| Expiry date | Nov 23, 2028 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L12/4625
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A method and an apparatus are disclosed for the coupling of a safety-critical process from a safe environment to an environment that is not safe or to an environment that is safe but has fewer processing channels. To this end, provision is made of a method which processes a data record that is relevant to the safety-critical process to form a respective safe protocol using at least two redundant processing channels in accordance with identical laws, and forms a common safe protocol taking into account at least two redundant safe coupling protocols. When writing at least elements of the common safety-based protocol using a processing channel with write authorization, another processing channel is used to check whether these elements are identical to one another. Access to a common buffer register for the purpose of storing these elements is enabled only when they are identical to one another.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.