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Self-diagnostic process control loop for a process plant

  • US 8,909,360 B2
  • Filed: 10/18/2012
  • Issued: 12/09/2014
  • Est. Priority Date: 12/05/2005
  • Status: Active Grant
First Claim
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1. A method of diagnosing a process control loop comprising a plurality of process control loop devices, wherein the process control loop is controlled based on adaptive process loop parameters calculated from an adapted model of the process control loop for a plurality of parameters of the process control loop, the method comprising:

  • evaluating on a computer a performance of the process control loop;

    evaluating on the computer a condition of a process control loop device within the process control loop;

    evaluating on the computer a quality of the adapted model of the process control loop;

    evaluating on the computer a stability of the process control loop;

    generating on the computer a diagnostic index from each of the evaluationsevaluating on the computer a condition of the process control loop from one or more of the diagnostic indices; and

    automatically adjusting on the computer a process variable filter based on evaluating on the computer a condition of the process control loop from one or more of the diagnostic indices.

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