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Sequence controller with microprocessor

  • US 4,328,539 A
  • Filed: 12/10/1979
  • Issued: 05/04/1982
  • Est. Priority Date: 07/28/1978
  • Status: Expired due to Term
First Claim
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1. A sequence controller for producing a plurality of signals at programmable times, comprising, in combination:

  • first and second storage means,said first storage means being non-alterable and storing representations of a plurality of programmed operations to be preformed in sequence,said second storage means being alterable and storing representatives of a plurality of programmable start and stop times, at which selected ones of plural operations are to be started or stopped,timing means for timing a cycle of operation of said sequence controller, and for producing signals corresponding to time intervals within such cycle of operation,coincidence determining means responsive to signals from said first storage means for comparing signals of said timing means with all of the signals of said second storage means and for determining a coincidence between said timing signals and each of said programmable times,and output means responsive to said coincidence determining means for producing a plurality of output signals and for changing the levels of said output signals at times corresponding to said programmable start and stop times, said coincidence determing means performing said comparing independently of said output signals.

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