Distributed processing in a cluster of industrial controls linked by a communications network
US4888726A · kind A · utility
71Cited by
17References
11Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 22, 1987 |
| Grant date | Dec 19, 1989 |
| Priority date | — |
| Expiry date | Apr 22, 2007 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02P90/02
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
A cluster of control processors are interconnected by a local area network and exchange data to carry out their control functions. Each controller executes a control program containing both conventional instructions and T-instructions which call for an operation on data maintained by another controller in the cluster. All data required to execute T-instructions is stored in a virtual I/O image table and each controller is responsible for keeping its section of this table up-to-date by periodically broadcasting its data on the local area network.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.