Local area network between an elevator system building controller, group controller and car controller, using redundant communication links
US5387769A · kind A · utility
44Cited by
8References
4Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 1, 1993 |
| Grant date | Feb 7, 1995 |
| Priority date | — |
| Expiry date | Jun 1, 2013 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F11/1633
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A LAN elevator network includes (a) a pair of redundant car buses for exchanging signals with car control system elements, (b) a pair of redundant group buses for exchanging signals with the redundant car buses through a car-group bridge, and (c) a pair of redundant building buses, which exchange messages with a building controller, through a group-building bridge. Communication among all nodes on the car bus, group bus, and building bus occurs using a single protocol. Each communications element on a bus communicates with the bus using a communications coprocessor including a transmitter and a receiver.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.