Method and system for diagnosing a fault or open circuit in a network

A fault injection circuit (34) injects a test signal into a data bus (17) with a normal high logic level and a normal low logic level. The test signal has a greater logic level greater than the normal high logic level of the data bus (17) or a lower logic level lower than the normal low logic level...

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Bibliographic Details
Main Authors SMART, DAVID C, SCHLICHTMANN, MICHAEL R, LANDMAN, RONALD G
Format Patent
LanguageEnglish
Published 24.12.2015
Subjects
ELECTRIC COMMUNICATION TECHNIQUE
ELECTRICITY
MEASURING
MEASURING ELECTRIC VARIABLES
MEASURING MAGNETIC VARIABLES
PHYSICS
TESTING
TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHICCOMMUNICATION
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Summary:A fault injection circuit (34) injects a test signal into a data bus (17) with a normal high logic level and a normal low logic level. The test signal has a greater logic level greater than the normal high logic level of the data bus (17) or a lower logic level lower than the normal low logic level of the data bus (17). An analog-to- digital converter (36) is coupled to a voltage level detector (35) for sensing an aggregate level of an aggregate signal on the data bus (17). The aggregate signal is composed of the termination circuit signal and the test signal. A diagnostic tool (10) determines whether a faulty connection between the data bus (17) and a network device (44, 144, 244) exists, where the sensed aggregate level exceeds at least one of the normal high logic level and the normal low logic level.
Bibliography:Application Number: AU20110349611