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System and method for controlling redundant communication links in networked safety systems

  • US 20040153701A1
  • Filed: 12/31/2002
  • Published: 08/05/2004
  • Est. Priority Date: 12/31/2002
  • Status: Active Grant
First Claim
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1. A method for maintaining communications on a safety system network connection, comprising:

  • communicating a link integrity signal indicative of a communication state on a first network communication link;

    generating a control signal having characteristics corresponding to the communication state of the first network communication link;

    controlling a communication link switch coupled to the first network communication link and one or more second network communication links in response to the control signal characteristics; and

    switching from the first network communication link to one of the second network communication links at the communication link switch if the control signal characteristics indicate a failure affecting any one or more signals associated with the first network communication link.

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