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Industrial equipment operating status scanner

  • US 5,586,057 A
  • Filed: 10/04/1994
  • Issued: 12/17/1996
  • Est. Priority Date: 10/04/1993
  • Status: Expired due to Fees
First Claim
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1. A fault status scanner for detecting fault conditions at any of a plurality of control circuit contacts and switches of an electric machine, comprising:

  • a) a plurality of inputs predetermined ones of which are connected in succession to respective ones of said contacts and switches, and a last one of said predetermined inputs in said succession being connected to a configuration point of said electric machine having a known predetermined voltage;

    b) means for scanning said plurality of inputs for said known predetermined voltage thereby identifying said last one of said inputs in said succession;

    c) means for scanning said predetermined ones of said inputs connected in said succession for occurrences of open circuit conditions, andi) in the event of detection of no open circuit conditions then displaying a message indicating that said machine is operational;

    ii) in the event of detection of an intermittent open circuit condition on one of said predetermined ones of said inputs displaying a message indicating that said machine is operational and that said intermittent open circuit condition has occurred on said one of said predetermined ones of said inputs; and

    iii) in the event of a non-intermittent open circuit condition on one of said predetermined ones of said inputs displaying a message indicating that said machine is not operational due to a non-intermittent open circuit condition on said one of said predetermined ones of said inputs and displaying any other open circuit conditions on any other of said predetermined ones of said inputs in ascending order of said inputs.

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