Method for continuous analysis of the transmission quality in fieldbus networks

• US 20080065797A1
• Filed: 09/11/2007
• Published: 03/13/2008
• Est. Priority Date: 09/12/2006
• Status: Active Grant

• Current Assignee: ABB AG (ABB Limited)
• Original Assignee: ABB Patent GmbH (ABB Limited)
• Inventors: Merlin, Tilo, Ude, Peter
• Granted Patent: US 7,953,570 B2
• Time in Patent Office: Days
• US Class Current: 710/100
• CPC Class Codes: H04L 12/40 Bus networks
• CPC Class Codes: H04L 12/403 with centralised control, e.g. polling
• CPC Class Codes: H04L 2012/40208 characterized by the use of a particular bus standard
• CPC Class Codes: H04L 43/0847 Transmission error

Abstract

A method is disclosed for continuous analysis of the transmission quality in fieldbus networks in automation systems with a plurality of fieldbus participants, which communicate with one another over the fieldbus network. Directly measurable logical and physical bus parameters are recorded from the line signal transmitted over the fieldbus network, and are stored with a predefinable retrospectivity. Operational parameters are derived from the measured bus parameters, these being weighted and the weighted bus parameters being linked together to form the operational parameter. The quantitative weighting of a bus parameter is functionally determined by at least one other bus parameter.

Claims

1. A method for continuous analysis of the transmission quality in fieldbus networks in automation systems with a plurality of fieldbus participants, which communicate with one another over the fieldbus network,

wherein

directly measurable logical and physical bus parameters are recorded from the line signal transmitted over the fieldbus network, and are stored with a predefinable retrospectivity,

that operational parameters are derived from the measured bus parameters, these being weighted and the weighted bus parameters being linked together to form the operational parameter and

that the quantitative weighting of a bus parameter is functionally dynamically determined by at least one other bus parameter.

2. The method as claimed in claim 1,

wherein

further operational parameters are formed from the operational parameters by weighted linking with at least one further operational parameter and/or at least one further bus parameter.

3. The method as claimed in claim 1,

wherein

at least one operational parameter is determined from the bus parameters by a fuzzy method.

4. The method as claimed in claim 1,

wherein

the weighting bus parameter is determined by means of a statistical method from its time series.

5. The method as claimed in claim 1,

wherein

the bus parameter to be weighted is determined by means of a statistical method from its time series.

6. The method as claimed in claim 1,

wherein

the operational parameters which are determined are recorded.

7. The method as claimed in claim 6,

wherein

the operational parameters which are determined are recorded as a time series.

8. The method as claimed in claim 2,

wherein

at least one operational parameter is determined from the bus parameters by a fuzzy method.

9. The method as claimed in claim 3,

wherein

the weighting bus parameter is determined by means of a statistical method from its time series.

10. The method as claimed in claims 3,

wherein

the bus parameter to be weighted is determined by means of a statistical method from its time series.

11. The method as claimed in claim 5,

wherein

the operational parameters which are determined are recorded.

12. A method for continuous analysis of a transmission quality over a fieldbus network, comprising:

measuring logical and physical bus parameters from a line signal transmitted over the fieldbus network, and storing with a predefinable retrospectivity,

deriving operational parameters from the measured bus parameters based on weighted bus parameters, the weighted bus parameters being linked together to form the operational parameter, and

functionally dynamically determining quantitative weighting of a bus parameter by at least one other bus parameter.