Control system for inhibiting processing communications

Details Control system for inhibiting processing communications Control system for inhibiting processing communications

1981-04-30

1983-08-16

Atkinson, Charles E.

Excavating

340663, 371 4, G06F 1130

Patent

active

043995381

ABSTRACT:
A control system is employed to selectively inhibit false signal transmissions between a communications processor and a plurality of peripheral devices during transient power states. The control system includes a comparator which detects a decrease in the unregulated power supply voltage as compared to the regulated voltage to anticipate an impending loss in regulated voltage. In response to a detected drop in unregulated voltage, a transistor interrupts the power supply to communications lines. Simultaneously, the transistor interrupts the power supply to a light source of an optically coupled relay which is employed to actuate a peripheral such as a mailing machine. In order to assure that the communications processor will initiallize after a transitory drop and a recovery in line voltage, a processor reset signal is also generated by the control system as a function of a detected decrease in unregulated voltage.

REFERENCES:
patent: 3286239 (1966-11-01), Thompson et al.
patent: 3321747 (1967-05-01), Adamson
patent: 3890494 (1975-06-01), Meshek et al.
patent: 4004283 (1977-01-01), Bennett et al.
patent: 4084232 (1978-04-01), Woods et al.
patent: 4307455 (1981-12-01), Juhasz et al.
Rayside et al., A Minicomputer Power Fail Detection System, Chemical Instrumentation, vol. 7, No. 3, 1976, pp. 211-218.

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