Security system
US7096380B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 11, 2002 |
| Grant date | Aug 22, 2006 |
| Priority date | — |
| Expiry date | Feb 28, 2024 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG05B9/03
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
The present invention relates to a programmable safety system intended to be used for safety functions, in which a fault in a control circuit does not lead to a safety function being disabled, which system comprises monitoring functions containing at least two control units, input terminals separately coupled to both control units, whereby each control unit executes its own instruction set and continuously compares a result from the execution with each other. At least one control unit can access the in and output terminal status of a second control unit and/or a number of flags, and the control units are arranged to monitor the result of respectively executed instruction sets and control that the results of the executions are substantially equivalent.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.