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System for processing HVAC control information

  • US 5,751,948 A
  • Filed: 12/26/1995
  • Issued: 05/12/1998
  • Est. Priority Date: 12/26/1995
  • Status: Expired due to Term
First Claim
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1. A process for writing control parameter information to addressable memory locations of a memory associated with a programmed processor wherein the control parameter information is used by the processor to control a unit that provides conditioned air to a space to be heated or cooled, said process comprising the steps of:

  • receiving the value of a control parameter that is to be used by the processor to control the unit providing conditioned air;

    associating the control parameter that is to be used by the processor to control the unit providing conditioned air with at least one addressable memory location;

    writing the value of the control parameter to a first portion of each addressable memory location associated with the control parameter;

    transforming the value of the control parameter in accordance with a particular mathematical transformation that is not to be used to transform values received for any other control parameters so as to produce a verification image having a unique mathematical relationship with respect to the value of the control parameter; and

    writing the verification image of the value of the particular control parameter to a second portion of each addressable memory location associated with the control parameter.

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