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Method and apparatus for checking a speed system of a motor-driven apparatus

  • US 9,093,883 B2
  • Filed: 04/09/2013
  • Issued: 07/28/2015
  • Est. Priority Date: 04/12/2012
  • Status: Active Grant
First Claim
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1. A method for checking a speed system of a motor-driven apparatus, comprising:

  • checking, with a control device, whether a speed signal generated by a speed sensor of the speed system is applied to a first input of the control device;

    outputting a test signal at an output of the control device to the speed system if the control device determines that the speed signal is not applied to the first input of the control device; and

    identifying a fault in the speed system, with the control device, if the outputted test signal is not sensed at the first input of the control device.

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