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Method and system of obtaining data from field devices

  • US 20060168396A1
  • Filed: 01/24/2005
  • Published: 07/27/2006
  • Est. Priority Date: 01/24/2005
  • Status: Active Grant
First Claim
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1. A method comprising:

  • obtaining data regarding a field parameter from a field device by a field controller;

    sending the data from the field controller to a data cache only if the data is different by a predetermined amount than previous data sent to the data cache; and

    operating a data acquisition system, wherein the data acquisition system polls the data cache at a polling frequency to obtain the data from the data cache.

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