Redundant industrial controller storing module and chassis level redundancy status
US5997166A · kind A · utility
23Cited by
10References
5Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jun 18, 1997 |
| Grant date | Dec 7, 1999 |
| Priority date | — |
| Expiry date | Jun 18, 2017 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG05B9/03
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
A redundant controller employs two controller chassis having replaceable functional modules interconnected electrically within the chassis. System back up modules in the chassis coordinate the switching of control from a primary to a secondary chassis according to chassis redundancy state information of the chassis stored in the backup modules and module redundancy state information stored in the modules unique to the modules.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.