Automatic process controller with digital memory

Details Automatic process controller with digital memory Automatic process controller with digital memory

1974-08-13

1976-02-24

Botz, Eugene G.

Registers

Transfer mechanism

Traveling pawl

318591, G05B 0700

Patent

active

039405931

ABSTRACT:
An electronic process controller is disclosed having analog circuitry for generating an analog control signal, a digital memory for generating a manual control signal and digital circuitry for sequencing of the analog functions. This controller provides drift-free manual control in the manual control mode, tracking of the process control signal in the automatic mode to allow bumpless transfer from automatic mode to manual mode and output ramping to allow bumpless transfer to and from direct digital control mode.

REFERENCES:
patent: 3694633 (1972-09-01), Lejon
patent: 3725762 (1973-04-01), Levesque
Figure 15 on p. III-84 of AD Conversion Handbook, published by Analog Devices, Inc. Norwood, Mass. 6-1972.

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