Multiprocessor supervisory control for an elevator system

Boots – shoes – and leggings

Patent

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

364132, 187 29R, 371 12, 371 14, 371 15, 371 16, G05B 1502, B66B 100, G06F 1116

Patent

active

045675600

ABSTRACT:
An elevator system, and method of monitoring same, which includes a plurality of elevator cars under the group supervisory control of at least first and second processors, which all share a common memory over a system bus. The first processor periodically monitors its own status, and it sets a predetermined location of the shared memory each time it finds its status to be normal. The second processor periodically checks the predetermined location, and upon finding it set, it resets it. The second processor also monitors its own status. The second processor triggers a retriggerable hardware timer each time it determines that the first processor and itself are both operating normally, with the trigger rate preventing the timer from reaching the end of a predetermined timing period. When the second processor finds the status of either processor to be abnormal, it terminates its triggering of the timer. The timer then provides a signal at the end of its timing period, which reinitializes both processors.

REFERENCES:
patent: 3321747 (1967-05-01), Adamson
patent: 3409877 (1968-11-01), Alterman et al.
patent: 3818199 (1974-06-01), Grossmann et al.
patent: 3854554 (1974-12-01), Booker, Jr.
patent: 3875390 (1975-04-01), Eccles et al.
patent: 3904860 (1975-09-01), Huber et al.
patent: 3908117 (1975-09-01), Naruse et al.
patent: 3916178 (1975-10-01), Greenwald
patent: 3959638 (1976-05-01), Blum et al.
patent: 4046227 (1977-09-01), Kirsch et al.
patent: 4114730 (1978-09-01), Means et al.
patent: 4162719 (1979-07-01), Husson et al.
patent: 4200226 (1980-04-01), Piras
patent: 4234920 (1980-11-01), Van Ness et al.
patent: 4248327 (1981-02-01), Mandel et al.
patent: 4307463 (1981-12-01), Sibley
patent: 4350225 (1982-09-01), Sakata et al.
patent: 4473133 (1984-09-01), Enriquez et al.

LandOfFree

Say what you really think

Search LandOfFree.com for the USA inventors and patents. Rate them and share your experience with other people.

Rating

Multiprocessor supervisory control for an elevator system does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Multiprocessor supervisory control for an elevator system, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Multiprocessor supervisory control for an elevator system will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFUS-PAI-O-1310158

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.