Achieving Lossless Data Streaming in a Scan Based Industrial Process Control System

• US 20120271962A1
• Filed: 10/11/2011
• Published: 10/25/2012
• Est. Priority Date: 10/14/2010
• Status: Abandoned Application

• Current Assignee: Invensys Systems Incorporated (Invensys PLC)
• Original Assignee: Invensys Systems Incorporated (Invensys PLC)
• Inventors: Ivanov, Dimitre Kirilov, Todorov, Ivan Atanassov, Victor, Hendrik Johannes, Xu, Xi
• Application Number:
  US13/270,730
• Publication Number:
  US 20120271962A1
• Time in Patent Office: Days
• US Class Current: 709/231
• CPC Class Codes: G06Q 10/10 Office automation; Time management
• CPC Class Codes: Y02P 90/02 Total factory control, e.g. smart factories, flexible manufacturing systems [FMS] or integrated manufacturing systems [IMS]

Abstract

A system for lossless sequence of events data streaming in a scan based process control system is provided. The system comprises a digital interface component, the digital interface component configured to receive a plurality of sequence of events data collected during one scan period, to produce a sequence of events data buffer comprising a plurality of sequence of events data, and to make the sequence of events data buffer available to at least one system component. The digital interface component comprises a storage component, the storage component configured to store a sequence of events data buffer. The system further comprises a processing component that accesses the sequence of events data from the storage component and processes the sequence of events data.

Claims

1. A system for lossless sequence of events data streaming in a scan based process control system, comprising:

a digital interface component, the digital interface component configured to receive a plurality of sequence of events data collected during one scan period, to produce a sequence of events data buffer comprising a plurality of sequence of events data, and to make the sequence of events data buffer available to at least one system component;

a storage component, the storage component configured to store a sequence of events data buffer, wherein the storage component is a component within the digital interface component; and

a processing component that accesses the sequence of events data from the storage component and processes the sequence of events data.

2. The system of claim 1, wherein the digital interface component comprises a data access server.

3. The system of claim 1, wherein the digital interface component receives at least one sequence of events data from at least one Programmable Logic Controller (PLC) and/or at least one Remote Terminal Units (RTU).

4. The system of claim 1, wherein the digital interface component is further configured to send a custom structure comprising a sequence of events data buffer to at least one system component.

5. The system of claim 1, wherein the sequence of events data comprises a value, time stamp and quality (VTQ).

6. The system of claim 1, wherein the digital interface component is further configured to order the sequence of events data.

7. The system of claim 6, wherein ordering the sequence of events data buffer is based on the arrival times associated with the sequence of events data.

8. The system of claim 6, wherein ordering the sequence of events data buffer is based on the time stamps associated with the sequence of events data.

9. The system of claim 1, wherein a plurality of client applications are configured to receive at least one sequence of events data buffer.

10. A method for lossless data streaming in a scan based process control system, comprising:

receiving at least one data aggregate, wherein each data aggregate comprises a value, time stamp and quality;

producing a buffer comprising at least one data aggregate;

storing the buffer;

producing a custom structure comprising the buffer;

transporting the custom structure; and

clearing the buffer.

11. The method of claim 10, wherein receiving at least one data aggregate comprises receiving at least one data aggregate collected during one scan period from at least one Programmable Logic Controller (PLC) and/or at least one Remote Terminal Unit (RTU).

12. The method of claim 10, wherein the custom structure is transported to at least one system component.

13. The method of claim 10, wherein storing a buffer further comprises ordering the data aggregates comprised in the buffer based on the values of the arrival times associated with the data aggregates comprised in the buffer.

14. The method of claim 10, wherein storing a buffer further comprises ordering the data aggregates comprised in the buffer based on the values of the time stamps associated with the data aggregates comprised in the buffer.

15. The method of claim 10, further comprising associating one buffer with one scan period.

16. A method for streaming data in a scan based process control system, comprising:

subscribing to at least one buffer, the buffer comprising at least one data aggregate, wherein each data aggregate comprises a value, time stamp and quality;

receiving at least one buffer;

storing at least one data aggregate;

extracting at least one data aggregate comprised in a buffer; and

processing at least one data aggregate.

17. The method of claim 16, wherein the at least one buffer is comprised in an ADO.NET Record Set.

18. The method of claim 16, further comprising scripting to access at least one data aggregate comprised in a buffer.

19. The method of claim 16, further comprising historizing data by extracting at least one data aggregate comprised in a buffer and processing at least one data aggregate.

20. The method of claim 16, further comprising logging alarms by extracting at least one data aggregate comprised in a buffer and processing at least one data aggregate.