Abstract: With people security , improvement that dependability require in lift , can programme controller (PLC ) control system complies with the era demand, develop rapidly. Because electrical machinery exchange frequency conversion transfer development , speed of technology , to pull way transfer from original direct current speed is it exchange frequency conversion transfer the speed to carry out the transition to gradually already lift.
System this exchange with one lift as target of accusing of , study on the basis of structure of control system of control method of PLC, make lift can give consideration to fast and comfortableness two major respect in the course of operating, and accurate flat storey while reaching and wanting to go the floor. That is to say , in the course of designing , we should be according to the rational establishment frequency converter parameter of best speed curve which the lift operate, is it is it guide motor realize level and smooth to transfer the speed , finish the control on sedan-chair railway carriage or compartment to drag to let. Meanwhile, we utilize the photoelectric encoder to cooperate with the counting in the end at a high speed of PLC, calculate the floor position in the well one of railway carriage or compartment of sedan-chair accurately, control the operation of the lift rationally. System adopt MCGS interface control configuration software, make one interface realize operation procedure control , simulation of lift, observe the dynamic operation information of the lift ocularly .
With the rise and completion of the intelligence, information-based building, the lift operates and controls towards intelligent development.
Keyword: Elevator, photoelectric colorimeter, varisweep technique,PLC control,intellectuality