Field Device with Means for Performing Diagnostic Methods
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Abstract
A field device is able to diagnose a broad spectrum of possible faults and/or states, and includes: structure for performing user defined, diagnostic methods; which has an input circuit, via which at least one input variable is fed to the structure; which has an evaluation unit, which serves for deriving, on the basis of at least one input variable selected by the user and at least one evaluating method selected by the user, at least one characterizing variable; which has a monitoring unit, which monitors the derived characterizing variables on the basis of monitoring criteria selected by the user; and which has an output unit, which, upon the meeting of a monitoring criterion, outputs a diagnosis associated with such monitoring criterion; and an interface, via which a user selects the input variables for each user defined diagnostic method, selects the evaluating methods to apply to the input variables, selects the monitoring criteria, and specifies the diagnosis.
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Citations
20 Claims
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1-10. -10. (canceled)
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11. A field device, comprising:
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means for performing user defined diagnostic methods, said means including; an input circuit, via which said means is fed at least one input variable, an evaluation unit, which serves for deriving, on the basis of at least one input variable selected by the user and at least one evaluating method selected by the user, at least one characterizing variable, a monitoring unit, which monitors derived characterizing variables on the basis of monitoring criteria selected by the user; and
an output unit, which, upon the meeting of a monitoring criterion outputs a diagnosis associated with such monitoring criterion, andan interface, via which a user, for each user defined diagnostic method, selects input variables, selects evaluating methods to apply to the input variables, selects monitoring criteria, and specifies the diagnosis. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19)
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20. A method for implementing a user defined diagnostic method in a field device comprising the steps of:
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the user selects from available input variables the input variables relevant for the diagnostic method and stores such in a field device; the user selects from available evaluating methods the evaluating methods relevant far the diagnostic method and specifies, to which of the selected input variables they should be applied; the user selects from available monitoring criteria the monitoring criteria relevant for the diagnostic method and specifies the characterizing variable, to which they should be applied; and the user specifies for each monitoring criterion an associated diagnosis, which is output by a diagnostic output upon the meeting of such monitoring criterion.
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Specification