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Control device in a system and method for monitoring a controller

  • US 6,604,006 B2
  • Filed: 12/11/2000
  • Issued: 08/05/2003
  • Est. Priority Date: 06/10/1998
  • Status: Expired due to Fees
First Claim
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1. A method for monitoring a controller, comprising:

  • processing input signals from peripheral elements identically in first and second control units;

    determining output signals in parallel for the peripheral elements, in the first and second control units;

    comparing states of the first control unit and states of the second control unit;

    sending a trigger signal to a disconnection component only upon identity between the states;

    sending the trigger signal from the second control unit to the first control unit if the identity between the states has been established in the second control unit;

    maintaining sequence functions of the controller only if the disconnection component is triggered regularly.

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