The Design Of Control System Of Hydraulic Construction Hoist Based On PLC And Touch Screen

The construction hoist is an inevitable tool for up and down transportation. But until now.the most used construction hoists are those of motor-mechanical transmission inland.The controlling unit of such kind of mechanical-electronic hoist is via contacting device,thus it's automation is not high,and it exists lots of unsafe troubles in the process of working.Furthermore,the traditional controlling way contains the disadvantage of the single speed controlling,great shock while start and stop,uncomfortable feeling for passengers.Because of these,the traditional controlling way for hoist couldn't meet the demand of tall building construction.So.research on the controlling way of construction hoist is meaningful.It can not only improve the constructing efficiency,but also eliminate the unsafe trouble and bring more economic benefits.The speed of hydraulic construction hoist is high and stepless.The start and break of this kind of hoist is very smooth.Based on the hydraulic construction hoist,this paper designs its controlling system via PLC.On the basis of well known all aspects of the construction hoist,I designs the controlling system for thirty floors hydraulic construction hoist.The system includes two main parts: the main controlling system and the display system.The communication method between the two parts is through series transmission.The controlling of construction hoist is by these two systems' corporate.The core of the main controlling system is the FX_2N48MR-001PLC.With the analogue output module FX_2N-2DA,this paper figures out the ideal working speed curves.The PLC system completes the entire I/O signals and communicates with the upper device.The PLC processes the concentrated data according to its inner programs,and carries out the controlling of hydraulic construction hoist.Meanwhile.this paper designs the main circuits,safety working circuit and the electronic-hydraulic proportional controlling circuit of the controlling system.The selected type of the display supervision is the touch-screen PWS1711-STN programmable controlling terminal.With its GUI software HITECH_ADP.this thesis designs friendly interface to complete the working condition and input the floor selecting number.By the display controlling system,we achieve the well humanness on the controlling of the construction hoist.The design of this controlling system greatly improves level of the construction hoist automation.The PLC and touch-screen work together to raise the maneuverability and safety of the controlling system.