Peer-to-peer register exchange controller for PLCS
US4897777A · kind A · utility
97Cited by
9References
13Claims
0Family size
Assignee
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Key dates
| Filing date | Apr 11, 1988 |
| Grant date | Jan 30, 1990 |
| Priority date | — |
| Expiry date | Apr 11, 2008 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG05B2219/1208
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
A communication network for programmable logic controllers (PLCs) wherein selected memory means of each PLC have at least two ports directly accessible by other PLCs and certain registers of the PLCs are identical to enable efficient, high-speed transfer of blocks of data between the PLCs.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.