Digital remote control system

Details Digital remote control system Digital remote control system

1979-07-18

1981-03-17

Yusko, Donald J.

Communications: electrical

Digital comparator systems

340505, 340147MD, H04Q 900, G08B 2300

Patent

active

042570310

ABSTRACT:
First and second redundant command signals are formulated in parallel-by-bit digital format by two ganged wafer switch sets in a control unit. The first redundant command signal is stored in a shift register and subsequently strobed out, by clock pulses received from a remote unit, and transmitted to the remote unit in serial-by-bit format where it is stored and used to control the remote unit. The command signal is subsequently clocked out of the remote unit and returned to the control unit in serial-by-bit format where it is compared against the second redundant command signal to insure that the remote unit has responded to the proper command.
A renewable timer is reset by the clock pulses. If the clock pulses are interrupted for more than a predetermined time the renewable timer times out and indicates a fault.

REFERENCES:
patent: 3577187 (1971-05-01), Benson
patent: 3689887 (1972-09-01), La Falce et al.
patent: 4044351 (1977-08-01), Everson
patent: 4086569 (1978-04-01), Pitches et al.
patent: 4155073 (1979-05-01), Ulch et al.

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