五层电梯的plc控制论文.doc

PIc(PLC)PLCAbstractElevators origin and the development, start from the manpower promotion hoist, afterward is the steam engine for the power guest ladder, the drum wheel type elevator, tows the row type elevator; The modern ten conductors, the thyratron technologys development, causes elevators control system turban mechanical and electrical -like to transit to the electronic formula control. As a result of integrated circuits development, computer technologys application, caused elevators control to present the leap. Thus the escalator, the monolithic integrated circuit, the PIc control, the microcomputer entire computer control, as well as the group control, obtains the widespread application one after another. The automatic even level, the microcomputer examination, the image display, the monitoring as well as the Communications Today slightly obtain the application in the elevator. The elevator technology to the modernization, the network, the intellectualized development, has provided extremely convenient and the comfortable condition to the people.The elevators electrical system is composed of the dragging system and the control system two parts. At present the elevator design uses programmable controller (PLC), the function change is flexible, the programming is simple, the breakdown are few, the noise is low. The service maintenance is convenient, the energy conservation labor saving, antijamming ability, the control box area are few. When the crew member enters the elevator, presses down the floor button, after the elevator door automatic shut-off. The control system carries on the following operation: Locates the position according to the sedan theater box and the crew member locates the layer. The determination sedan theater box movement direction, guarantees the sedan theater box even strata time deceleration. Stops the sedan theater box on the designation floor; At the same time, according to floors call, stops on the way, autoswitch gate. Moreover must have the signal light inside and outside the sedan theater box to demonstrate the elevator movement direction and the floor number.Key word: Elevator, PLC, frequency changer, tractor, electric motor. 11.1 11.2 21.3 PLC21.3.1PLC31.3.2PLC31.3.3PLC31.3.4PLC4 62.1 62.1.162.1.262.1.372.272.3 .7 93.1.93.1.1.93.1.2103.2103.2.1103.2.2103.2.3113.2.4113.2.5123.3123.3.1123.3.2123.3.3133.3.4133.3.5143.4.143.4.1143.4.2143.4.3143.4.416PLC174.1174.1.1174.1.2174.1.3174.1.4184.1.5184.1.6194.1.7204.1.8 214.1.9214.2 224.2.1224.2.2224.2.3224.2.4234.3234.4PLCI/0244.4.1PLC244.4.2 I/0244.5PLC254.626282930 1.1 PLCPLC30%10%2%2001561020%50050200202080%GDP152560%19901990152007 15000200001503530004000200580%12220158001.2 12A30BC1.3 PLC1.3.1PLC,/1.3.2PLC123PLC4PLC5PLC100mm150g1.3.3PLC PLCPLC1PLC6070 PLCPLCI/OPLCPLC2PLC708070PLCPLC(CPU)PLCI/OPLC3PLC8080PLCPLCPLC.1.3.4PLC1PLCPLCPLC0.1ms/kPLC2PLCPLCI/O14336PLC32CPU3PLCI/OCPUI/OPLCPLC4PLCCPU5%I/O15%45%30%5%20%PLCPLC80%PLCPLC5PLCPLCPLCBASICCPLC 2.1 2.1.112