The Retrofit Of The Old Elevator Based On PLC And Frequency Converter

With the rapid development of China's elevator industry,the elevator is in the high-rise building has the necessary transportation like cars,is widely used by the masses of the people,the security problem of elevator,energy consumption problem has become the common concern of people's topic,has become the object of the government supervision department supervision point.Old elevator technology is backward,poor control level,high energy consumption,components aging,often malfunction,off people,and even cause casualties.It is urgent to solve the problem of the elevator industry to carry out technical transformation on the poor reliability and energy consumption of the old elevator.This topic to a company five five station of the old elevator(assessment is not qualified)for the transformation of the object,put forward the overall transformation program.Using PLC control to improve the safety and reliability of the elevator operation,improve the level of control,and improve the function of the elevator.The use of frequency control to improve the comfort of the elevator operation,energy saving.The installation of the elevator uplink protection facilities protection device,five party intercom and other new,and the elevator system,elevator car,safety switch,overload switch,door baseboard and pit guardrail ladder and other equipment for technological transformation,to meet the requirements of the current national elevator elevator safety inspection specification technology.This paper introduces the PLC control system of the I/O signal selection and circuit design,the parameters of the inverter settings.The design of the elevator control program flow chart,elevator call registration display and eliminate the number,floor display,car running direction,start,slow flat layer parking,door opening and closing operation and maintenance operation of the elevator control ladder diagram.In the elevator car with the installation of a living body detection sensor,automatic alarm system to achieve the elevator,to protect the safety of personnel.The elevator has energy-saving lighting control,with straight,anti nuisance control functions,and fault code display,convenient maintenance personnel to troubleshoot the elevator fault.The elevator is connected by the remote monitoring system and network maintenance units,maintenance personnel can obtain the fault diagnosis information and remote technical guidance,shorten the maintenance time.Elevator remote monitoring system connected through the network and special equipment supervision and inspection center,special equipment supervision department can directly use and maintenance unit for elevator operation service responsibilities for effective supervision.The research results of this paper can be widely used in the elevator transformation,with obvious economic benefits and social benefits.