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Data processor apparatus for multitariff meter

  • US 4,355,361 A
  • Filed: 02/06/1980
  • Issued: 10/19/1982
  • Est. Priority Date: 02/06/1980
  • Status: Expired due to Term
First Claim
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1. In a system for controllably switching a load to and from a source of electrical power according to a predetermined time schedule, the combination comprising:

  • timing means for generating periodic timing signals;

    programmable data processor means including at least first and second signal storage files, and responsive to said timing signals for generating real time clock data stored in said first file;

    readable memory means for storing data representative of a plurality of calendar times for effecting schedule events;

    said data processor means addressing said memory means and being programmed to retrieve said calendar time data stored at a location of said memory means addressed by said data processor means and store the data read-out in said second file;

    said data processor means being further programmed to compare said real time clock data in said first file with said calendar time data in said second file, and, if the real time represented by the real time data exceeds the calendar time represented by the calendar time data, to cyclically increment the calendar time read-out by incrementing addresses of said memory means until the calendar time represented by the calendar time data read out of said memory means and stored in said second file is greater than the real time represented by the real time data stored in said first file.

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