Troubleshooting of an industrial control program

A system for troubleshooting control programs employs an event log that captures the values of inputs to outputs from the control program only at event times determined by changes in input or output data. The program allows the event log to be reviewed in jumps to only events which cause a change in...

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Bibliographische Detailangaben
Hauptverfasser:	Guenther, Robert, Zuponcic, Steven A, Hall, Kenwood H
Format:	Patent
Sprache:	eng ; fre ; ger
Schlagworte:	CONTROL OR REGULATING SYSTEMS IN GENERAL CONTROLLING FUNCTIONAL ELEMENTS OF SUCH SYSTEMS MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS ORELEMENTS PHYSICS REGULATING
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Beschreibung
Zusammenfassung:	A system for troubleshooting control programs employs an event log that captures the values of inputs to outputs from the control program only at event times determined by changes in input or output data. The program allows the event log to be reviewed in jumps to only events which cause a change in output value of an instruction or particular change in output value of a particular instruction, greatly simplifying the troubleshooting process. The event log records a particular instruction instance associated with the event permitting the operation of the program to be studied in reverse order. The event log may also record a timestamp of the event allowing time stamped data from different devices to be synchronized with the review of the events.