plc建筑電梯控制系統(tǒng)中英文資料外文翻譯文獻(編輯修改稿)
2025-01-11 12:46 本頁面
【文章內(nèi)容簡介】 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, rectifiers and transformers etc., are centralized in the control cabi. The Power of the control cabi was imported from the chief power of the elevator room. This power was also introduced into control panel by soft cables and was linked with each control buttons. The power lines which was derived from control cabi was delivered to tow electric motors. Others control lines and signal lines were separately sent to each floor junction Ⅳ . Program design The design includes two parts: hardware and hardware design is the base of software. Considering that the control demands are relatively plex, we design the programs separately according to the control function. Furthermore, we follow the principle as follows: When the elevator is ascending, the ascending demands are prior to other demands。 When the elevator is descending, the descending demands are prior to other demands. The Sequential Function Chart (SFC) is adopted during the boxes to form elevator’s executive circuitry design. It is a method specially used in industrial sequential control. The SFC method can describe the system’s working procedure in great detail. For example there is a three layers intelligence building. A subprogram, the calling from the third floor as elevator in the first floor, is shown in Fig. 3 with SFC. When all SFC are drawn an
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