Industrial automation system and method for efficiently transferring time-sensitive and quality-sensitive data
US6505247B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 2, 1999 |
| Grant date | Jan 7, 2003 |
| Priority date | — |
| Expiry date | Feb 2, 2019 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG05B2219/33149
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
The system and method of industrial automation provides improved network transfer of data between nodes. The system comprises a plurality of computer systems which are interconnected through a network, wherein each of the computer systems executes industrial automation software. One or more of these computer systems interface to various hardware I/O devices for data acquisition. Each computer system is home to one or more client and/or server processes. Before data acquisition begins, every server process registers a plurality of time/quality (TQ) groups, wherein each TQ group is identified by a time/quality identification value (TQID), and wherein each TQ group represents a set of associated data elements. When a hardware I/O device generates data, a server process which is linked to that device through a device driver receives a block of data from the device. The driver assigns to the block a single timestamp and a single quality value. Using a real-time protocol, the server adds one or more blocks of data to a packet and transmits the packet to every client which has subscribed to the data. For increased network and computational efficiency, the real-time protocol includes compr…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.