The Realization of a Control Algorithm and its PLC Based Program Able to Authorize Four Different Ranks of Priority to Elevator Users

Year 2016, Special Issue (2016), 416 - 420, 01.12.2016

Mümine Yıldız Coşkun Mehmet Karalı

Abstract

Elevator software programs are currently unable to meet the required
demand regarding elevator services of high-rise community and government
buildings such as hospitals and social centers. Administrators, emergency room
doctors and nurses in hospitals; authorities in public or governmental
buildings (such as ministers, governors, rectors, deans); or managers, and
staff working in community buildings wish privileged use of existing elevators.
This isn’t only a personal privileged, but an institutional necessity;
resulting in a second elevator assigned to VIP use. Regrettably, while such
elevators are empty, others become too crowded and queues form up, resulting in
frequent breakdowns. Not to mention the unauthorized use of said elevators
causing problems in instances where an emergency is at hand. The solution of
card and/or key systems on the other hand has become tedious and inefficient.
In this project, authorization rankings were assigned and special usage
privileges given. Thus, in cases where VIP usage is needed, the elevator
temporarily cancels out either totally or partially all other calls according
to VIP ranking, resulting in the efficient use of elevators by preventing them
from being inactive when there is no ongoing VIP usage. Algorithms have been
written for authorized use and have been designed for flexible response using
PLCs. This project utilizes a model encompassing a four rank authorization
system (three VIP, and one normal) which, after a number of simulations, has
been tested on a servomotor-powered mechanism. The project is planned to be
expanded to incorporate up to a ten rank authorization system.

Keywords

Elevator Control, PLC (Programmable Logic Controller), Privileged Use of Elevators

References

• [1] E. İmrak and İ. Gerdemeli, Asansörler ve Yürüyen Merdivenler, Birsen Yayınevi, İstanbul, 2000.