System and method for managing industrial process control data streams over network links
US8055787B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 10, 2004 |
| Grant date | Nov 8, 2011 |
| Priority date | — |
| Expiry date | Dec 20, 2028 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L47/56
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A data acquisition service on a network node is disclosed for forwarding received process data to a process history database over a potentially slow and/or intermittent network connection. A store and forward functionality within the networked node receives incoming process data via a first network interface and forwards outgoing process data via a second network interface. The disclosed store and forward functionality includes an immediate transmission cache and a store and forward storage. The store control enters, in response to detecting an entry condition, an activated mode wherein incoming process data is directed to the store and forward storage. A read control forwards outgoing process data to the second network interface from the immediate transmission cache and store and forward storage. The read control includes at least a first configurable parameter that constrains a rate at which data retrieved from the store and forward storage is forwarded via the second network interface.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.