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US 2008/0211660 A1Published application
Field device system and field device system diagnosing method
AssigneeYokogawa Electric Corporation
InventorMakoto Takeuchi
Life of this patent
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Abstract
A field device system having a transmission line, includes a diagnostic module that detects whether or not a failure of the transmission line is present. Also, the diagnostic module has at least one measuring portion for measuring electric characteristics of the transmission line, and the like.
Claims13
A field device system comprising:
- a transmission line;
- and
- a diagnostic module for detecting whether or not a failure of the transmission line is present.
A diagnostic method of detecting a failure of a transmission line of a field device system, comprising:
- a step of measuring electric characteristics of the transmission line by a measuring portion;
- a step of calculating a threshold based on an initial measured value of the measuring portion;
- a step of comparing a measured value of the measuring portion with the threshold;
- a step of outputting an alarm based on a compared result;
- a step of storing the measured value of the measuring portion together with time information;
- and
- a step of holding communication with an external device.
4 more elements
Dependencies are inferred from the claim text.