WO2008045258A3 - Two-wire process control loop diagnostics - Google Patents

Two-wire process control loop diagnostics Download PDF

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Publication number
WO2008045258A3
WO2008045258A3 PCT/US2007/021242 US2007021242W WO2008045258A3 WO 2008045258 A3 WO2008045258 A3 WO 2008045258A3 US 2007021242 W US2007021242 W US 2007021242W WO 2008045258 A3 WO2008045258 A3 WO 2008045258A3
Authority
WO
WIPO (PCT)
Prior art keywords
process control
control loop
wire process
analog signal
digital communication
Prior art date
Application number
PCT/US2007/021242
Other languages
French (fr)
Other versions
WO2008045258A2 (en
WO2008045258B1 (en
Inventor
Garrie D Huisenga
Randy J Longsdorf
Donald R Lattimer
Original Assignee
Rosemount Inc
Garrie D Huisenga
Randy J Longsdorf
Donald R Lattimer
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Rosemount Inc, Garrie D Huisenga, Randy J Longsdorf, Donald R Lattimer filed Critical Rosemount Inc
Priority to EP07852513.6A priority Critical patent/EP2067088B1/en
Priority to JP2009531438A priority patent/JP5068822B2/en
Publication of WO2008045258A2 publication Critical patent/WO2008045258A2/en
Publication of WO2008045258A3 publication Critical patent/WO2008045258A3/en
Publication of WO2008045258B1 publication Critical patent/WO2008045258B1/en

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/24—Testing correct operation
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/24—Testing correct operation
    • H04L1/242—Testing correct operation by comparing a transmitted test signal with a locally generated replica
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/24—Testing correct operation
    • H04L1/245—Testing correct operation by using the properties of transmission codes

Abstract

A diagnostic device (50) for coupling to a process control loop (18) includes digital communication circuitry (52) configured to receive a digital communication signal from the process control loop (18). The digital communication signal is a digitally modulated analog signal on the process control loop (18) which is modulated to a plurality of discrete analog signal levels representative of digital values. Diagnostic circuitry (54) diagnoses operation of the process control loop (18) which may include field devices of the process control loop based upon the digitally modulated analog signal.
PCT/US2007/021242 2006-10-05 2007-10-03 Two-wire process control loop diagnostics WO2008045258A2 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP07852513.6A EP2067088B1 (en) 2006-10-05 2007-10-03 Two-wire process control loop diagnostics
JP2009531438A JP5068822B2 (en) 2006-10-05 2007-10-03 2-wire process control loop diagnostics

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US11/543,349 2006-10-05
US11/543,349 US7321846B1 (en) 2006-10-05 2006-10-05 Two-wire process control loop diagnostics

Publications (3)

Publication Number Publication Date
WO2008045258A2 WO2008045258A2 (en) 2008-04-17
WO2008045258A3 true WO2008045258A3 (en) 2008-05-29
WO2008045258B1 WO2008045258B1 (en) 2008-07-24

Family

ID=38969412

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2007/021242 WO2008045258A2 (en) 2006-10-05 2007-10-03 Two-wire process control loop diagnostics

Country Status (5)

Country Link
US (1) US7321846B1 (en)
EP (1) EP2067088B1 (en)
JP (1) JP5068822B2 (en)
CN (2) CN104618079B (en)
WO (1) WO2008045258A2 (en)

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Also Published As

Publication number Publication date
JP5068822B2 (en) 2012-11-07
EP2067088B1 (en) 2014-07-16
EP2067088A2 (en) 2009-06-10
JP2010506298A (en) 2010-02-25
US7321846B1 (en) 2008-01-22
WO2008045258A2 (en) 2008-04-17
WO2008045258B1 (en) 2008-07-24
CN104618079B (en) 2019-10-22
CN101523318A (en) 2009-09-02
CN104618079A (en) 2015-05-13

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