Method for detecting a fault on a data line
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United States of America Patent
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Nov 1, 2011
Grant Date -
Jan 21, 2010
app pub date -
Jul 14, 2009
filing date -
Jul 16, 2008
priority date (Note) -
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status (Latency Note)
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Abstract
Multiple embodiments relate to a method for detecting a fault on a data line in a bus system in a two-line data network having at least two control units. A data signal is emitted by a transmitter-receiver unit on the two data lines as a differential voltage signal that includes a defined quiescent current. The data lines are mutually connected through a resistance bridge for detecting the middle voltage. The middle voltage is detected directly by a microcontroller after a low-pass filter or as a digital value after an analog-to-digital conversion. The result is displayed and/or stored. A circuit arrangement for implementing the method is also provided.
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