Importance

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Abstract

A fault diagnostic apparatus for the recognition of defective components of a technical system with fault-relevant process variables contains a diagnostic module which has a checklist and a table of predetermined conditions (in memory). The conditions are determined by a component fault simulation in a generated model of the operation of the system. The checklist provides a primary process variable and secondary process variables affected thereby, and the table of conditions gives for each combination of fault-relevant process variables, the corresponding components suspected of being faulty. During the operation of the system, the diagnostic module detects the condition values of the primary process variables and, upon the occurrence of a fault condition therein, activates a diagnostic process in which it compares the actual condition combination with the one stored in the table of conditions. If upon comparison, the fault conditions are the same, the diagnostic module identifies the correspondingly stored suspected component.

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First Claim