Abstract
Lifts play an important role in human transportation in multi-storage buildings, which experience continuous improvements to their architecture and structure. As a result of these improvements, the development of efficient lift systems with more programs is required to meet these changes. In this work, a lift control system based on a programmable logic controller (PLC) is introduced, elucidating the development of the lift control algorithm and network based on a dispatching algorithm that utilizes a fuzzy system and exploits the traffic situation and condition. The PLC language ladder logic is implemented to facilitate a reduction in the average waiting time of passengers and the power consumption. Ladder diagrams for different scenarios are compared. The analysis of personnel-machine-environment (P-M-E) system conditions was conducted, examining numerous physical factors that could pose health and safety threats to workers. The present study opens doors for future lift systems studies based on PLC and the estimation of a safe workplace for machines and operators.
Highlights
Lifts are essential motor-powered vertical media of transportation in residential, commercial and industrial buildings that play a huge role in the movement of people around these environments
programmable logic controller (PLC) serves as a more enhanced replacement for designing modern lift control systems to circumvent these shortcomings and improve the troubleshooting of the system by allowing for easy monitoring of the inputs and outputs via human-machine interaction (HMI) devices, such as the HMI–LED indicator, better operational speed, reliability and relatively lower costs compared to other programmable control systems [4,5,6,7,8]
PLC has been successfully demonstrated in several control studies, including lift control systems [9,10,11,12,13,14]
Summary
Lifts are essential motor-powered vertical media of transportation in residential, commercial and industrial buildings that play a huge role in the movement of people around these environments. Lifts are used in almost all the multi-storage buildings of metropolitan areas and it is important to replace the traditional relay logic controlled lifts with more programmable technology based lifts for better efficiency, such as PLC [2,3]. These relay controlled systems have several limitations, such as a high fault ratio, difficulty in replacing flawed parts of the automated system and highly complex circuitry. The present study presents a simplified lift control system using a PLC algorithm based on fuzzy logic scheme that can be implemented and adapted to other control system designs
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