Protocol for extended data transfer in scan-based industrial controller I/O system
US6662247B1 · kind B1 · utility
17Cited by
5References
13Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 27, 2000 |
| Grant date | Dec 9, 2003 |
| Priority date | — |
| Expiry date | Nov 27, 2021 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG05B2219/1149
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
Extended low priority data is integrated into high priority I/O data in a scanned data transfer protocol using regular transmission fixed data blocks by allocating as little as a single word of the data block to the sequential transmission of this low priority data. Low priority data is buffered on both sides of this transmission to allow it to be transmitted over the course of many data block. As a result, the regular and predictable transfer of input and output data is not upset while allowing arbitrarily large low priority data to be sent at a relatively low data rate.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.