Fast programmable limit switch

Details Fast programmable limit switch Fast programmable limit switch

1991-03-06

1993-07-13

Smith, Jerry

Boots, shoes, and leggings

36416701, G05B 1918

Patent

active

052279650

ABSTRACT:
A programmable limit switch employs high speed special purpose hardware and a general purpose microcontroller to achieve high speed limit switch operation. A state sequencer controls the high speed special purpose hardware in a fixed sequence. The state sequencer latches position data, and recalls position offsets from a memory. A hardware digital adder sums the position and offset with this summed offset position used as an address in output tables for selecting an output status word. The microcontroller operates asynchronously with respect to the state sequencer. The microcontroller initializes and updates the memories. The microcontroller calculates the velocity from repetitive position signals and writes the corresponding window offsets to memory. A selection circuit picks out the status bit of the particular output circuit. Thus unique ON/OFF offsets can be used for each circuit. The outputs are shifted together and latched to the output drivers. By this method the output update time is dependent on the rate of the state sequencer. Using fast logic the update time is greatly reduced over a software only implementation even by very fast microcontrollers.

REFERENCES:
patent: 3167002 (1965-01-01), Kaneda et al.
patent: 4037216 (1977-07-01), Chang et al.
patent: 4096579 (1978-06-01), Black et al.
patent: 4149235 (1979-04-01), Froyd et al.
patent: 4218754 (1980-08-01), Schaeffer
patent: 4510565 (1985-04-01), Dummermuth
patent: 4578749 (1986-03-01), Kuno et al.
patent: 4744022 (1988-05-01), Kumar et al.
patent: 4835676 (1989-05-01), Kumar et al.
patent: 4839789 (1989-06-01), Kumar et al.
patent: 5014183 (1991-05-01), Carpenter et al.

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