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Automatically downloaded link active schedule

  • US 6,915,364 B1
  • Filed: 07/02/1999
  • Issued: 07/05/2005
  • Est. Priority Date: 07/02/1999
  • Status: Expired due to Term
First Claim
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1. A method of providing a backup link active schedule for use in controlling communication in a process control system having a master link active scheduler that controls communication on a databus using a link active schedule and a backup link active scheduler that performs backup control of communication on the databus communicatively coupled directly together via the databus, and further including a controller communicatively connected to the databus, comprising the steps of:

  • providing process control signals to the databus from the controller to perform process control activities;

    storing a link active schedule in a master link active scheduler wherein the link active schedule includes a communication timing schedule for the databus;

    automatically transmitting the link active schedule from the master link active scheduler over the databus to the backup link active scheduler upon receipt of the link active schedule in the master link active scheduler apart from the process control signals; and

    storing the link active schedule in the backup link active scheduler.

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