Field device for digital process control loop diagnostics
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United States of America Patent
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Sep 15, 2009
Grant Date -
Mar 26, 2009
app pub date -
Sep 25, 2007
filing date -
Sep 25, 2007
priority date (Note) -
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Abstract
A diagnostic field device for coupling to a two-wire process control loop of an industrial process control or monitoring system includes digital communication monitoring circuitry which is configured to couple to a two-wire process control loop. The digital communication monitoring circuitry is configured to receive a digital communication signal from the two-wire process control loop. Timing circuitry in the diagnostic field device provides a timing output. Diagnostic circuitry provides a diagnostic output based upon the digital communication signal and the timing output.
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