PLC在热轧钢卷步进运输机控制中的应用.doc

摘 要 随着现代企业生产规模的不断扩大与自动化程度的不断加深，使得生产过程中的物料运输环节成为一个企业发展至关重要的命脉。步进运输机正是用来控制生产物运输的自动控制系统，随着计算机技术的发展，运用PLC来实现步进运输机的控制已成为国内外生产线的主流控制系统。如何让PLC更好的与自动化技术相结合，充分的应用到国内的工控企业生产线上，已成为我国工控企业面临的首要任务。传统的钢卷步进运输机大都是继电器控制，而继电器控制有着接线繁多，故障率高，维修不易等缺点。作为目前国内控制市场上的主流控制器，PLC在市场、技术、行业影响等方面 ABSTRACT Modern enterprises continue to expand the scale of production and automation degree unceasing deepening, the material transport links in the production process become lifeline is crucial to the development of an enterprise. Stepping transport is the automatic control system used to control the production of material transportation, with the development of computer technology, control the use of PLC to achieve stepping transport has become the mainstream of domestic and foreign production line control system. Combined to make PLC better and automation technology, fully applied in the production line of domestic industrial enterprises has become the primary task facing Chinas industrial enterprises The traditional steel coil stepping transport is mostly the relay control, relay control wiring, high fault rate, defect repair is not easy. As the main controller to control the domestic market, has an important role in the market, PLC technology, industry influence, use the PLC control to replace the relay control has is to represent the general trend. The application of PLC to stepping conveyor electric control system, can realize the conveyor automation control, reduce the operation cost of the system. Application of PLC step in steel conveyor control system, has been applied in engineering at home and abroad, the factory, and has huge economic and social value, the automation and intelligent ideas worthy of further research and extension. Key words Stepping conveyor，Control，PLC，automatic control 目 录 摘 要 I ABSTRACT II 1 绪论 1 1.1 课题提出的背景 1 1.2 步进运输机的发展状况 1 1.3 本课题研究的主要内容 2 2 步进运输机的控制要求 2 2.1 步进运输机的控制工艺简介 2 2.2 步进运输机控制的主要设备 2 2.3 控制要求 3 3 控制方案设计 6 3.1 控制目标的确定 6 3.2 控制系统 6 3.3 控制方案的实现 6 4 测控元件选择