Process device with quiescent current diagnostics
First Claim
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1. A process device for use on an industrial process control system, comprising:
- an electrical connection configured to couple to a process control loop;
output circuitry configured to transmit data on the process control loop;
a quiescent current sensor configured to sense quiescent current draw of the process device; and
diagnostic circuitry configured to determine a diagnostic condition of the process device as a function of the sensed quiescent current.
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Abstract
A process device for use on an industrial process control system includes a quiescent current sensor configured to sense quiescent current draw of the process device. Diagnostic circuitry determines a diagnostic condition of the process device as a function of the sensed quiescent current.
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Citations
42 Claims
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1. A process device for use on an industrial process control system, comprising:
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an electrical connection configured to couple to a process control loop;
output circuitry configured to transmit data on the process control loop;
a quiescent current sensor configured to sense quiescent current draw of the process device; and
diagnostic circuitry configured to determine a diagnostic condition of the process device as a function of the sensed quiescent current. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27)
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28. A method of determining a diagnostic condition of a process device of the type used in industrial process control systems, comprising:
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coupling the process device to a process control loop;
outputting data on the process control loop;
monitoring quiescent current draw of electrical components of the process device; and
diagnosing a condition of the electrical component of the process device based upon the monitored quiescent current. - View Dependent Claims (29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42)
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Specification