Stored program digital process controller
First Claim
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1. Digital process controlling apparatus comprising:
- a clock generator;
a dwell time code generator connected to said clock generator for providing a plurality of pulse frequencies;
dwell time select decoder connected to said dwell time code generator selecting desired pulse frequencies;
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Abstract
A digital process control function generator wherein a timing clock, in conjunction with programmable read only memories controls variables in a process with respect to time.
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Citations
2 Claims
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1. Digital process controlling apparatus comprising:
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a clock generator; a dwell time code generator connected to said clock generator for providing a plurality of pulse frequencies; dwell time select decoder connected to said dwell time code generator selecting desired pulse frequencies;
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2. memory address counter means in circuit with said dwell time select decoder for converting said pulse frequencies to memory addresses;
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a first programmable read only memory having an input from said memory address counter and an output to said dwell time select decoder for setting dwell times corresponding to memory addresses; a second programmable read only memory having an input from said memory address counter having process variables stored therein at addresses coinciding with the corresponding dwell times stored in said first programmable read only memory; process control means connected to the output of said second programmable read only memory; and
,an auxiliary process control relay connected to the output of said first programmable read only memory.
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Specification