FAIL-SAFE COUNTER EVALUATOR TO INSURE PROPER COUNTING BY A COUNTER

A fail-safe counter evaluator is provided to insure proper counting operations by fail-safe counters. The failsafe counter evaluator comprises a first microprocessor, a first counter, a second counter, a second microprocessor and a test channel. The first counter is configured as a counter in operat...

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Bibliographische Detailangaben
Hauptverfasser:	HAUSMAN, Steven M, PARFITT, Steven Perry
Format:	Patent
Sprache:	eng ; fre ; ger
Schlagworte:	BASIC ELECTRONIC CIRCUITRY ELECTRICITY MEASURING MEASURING ELECTRIC VARIABLES MEASURING MAGNETIC VARIABLES PHYSICS PULSE TECHNIQUE TESTING
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Beschreibung
Zusammenfassung:	A fail-safe counter evaluator is provided to insure proper counting operations by fail-safe counters. The failsafe counter evaluator comprises a first microprocessor, a first counter, a second counter, a second microprocessor and a test channel. The first counter is configured as a counter in operation and disposed in the first microprocessor to receive externally generated count pulses. The second counter is disposed in the first microprocessor and configured to undergo a test. The test channel is configured to send an input test signal to the second counter based on test pulses from the second microprocessor. The first microprocessor and the second microprocessor are synchronized so that to coordinate a start and an end of the test. The second counter is evaluated after the test pulses have been sent to determine if the second counter is operating properly.