plc在智能建筑電梯控制系統(tǒng)中的應(yīng)用中英文翻譯資料-建筑結(jié)構(gòu)(存儲(chǔ)版)
【正文】 of the elevator with safety. This paper mainly discusses the elevator control system’s working principles, the system’s software and hardware realization methods and so on. Ⅱ . The Working Principle of Elevator Control System In Fig. 1 the Hardware Structure Graph of Elevator Control System is presented. Fig. 1 The Hardware Structure Graph of Elevator Control System The Working Principles of Elevator Control System are stated as follows: The spot control information is send into the PLC from the customer input devices firstly, then the PLC control cabi is required to send out the control signal to drive the equipments according to the system demands. The elevator can then perform the homologous action according to the control request. There are velocity feedback devices in system, which adopt measure velocity generators to provide the elevator velocities and generally are installed in the tail of tow motors .So this is a feedback control system, which can improve the system’s control precision. Ⅲ . The Hardware Configuration of Control System It is not necessary to do interface circuit in the elevator’s PLC control we should do is to send the signals to PLC digital input signals include inside and outside calling signals ,floor location inspecting signals , limiting location signals ,opening and shutdown the elevator door signals etc. The DC power which is provided to PLC can be used as indicator light power. The PLC output points can be directly used to control transducers for the purpose of electrical motor’s positive turn and reverse ,stop and control each segment velocity and so on .ＯＭＲＯＮ pany’s Ｃ 200HE series PLC has been selected as major control configuration according to the input/output points and the length of user’s program. On the other hand we also consider that the system’s function can be expanded in the future .Ｃ 200HE series PLC ,whose perfect function and strong reliability, can meet these demands at present. Moreover, input and output devices are needed in elevator control system, besides the PLC, system’s major control device. Part of signal hookups of the elevator electric control system is shown in . The control cabi is the control center, from which we can send out various control mands. The control cabi often was installed in the elevator room .The electric devices and signal systems, for example the contactors, relays, capacitances, resistors,
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