基于PLC的加热炉自动上料控制系统.docVIP

基于PLC的加热炉自动上料控制系统 摘 要 可编程逻辑控制器是集微处理器，存储器，输入输出接口与中断系统于一体的器件，已经被广泛应用于机械制造，冶金，化工，能源，交通等各个行业。PLC具有较强的逻辑运算能力，可以实现各种开关量从简单到复杂的逻辑控制，在现代工业生产过程中，有许多连续变化的模拟量，如温度，压力，流量，液位等，可编程逻辑控制器可实现对模拟量的控制。 本次设计针对加热炉自动上料控制系统，考虑到生产实际工程，以工业生产中常见的加热炉为主体，分析并设计它的自动上料控制系统。控制运料小车在生产轨道上的动作，生产轨道上设有行程开关，可以让小车自动发出信号，控制炉门的开闭，同时小车前进后退与卸料过程都可以自动实现。这次设计完成了主电路，辅助电路的设计。另外设计出了控制系统对应的梯形图，通过PLC编程程序，用STEP-7软件和S7-200联机调试，成功地仿真了整个生产工程，运行良好，达到了设计的目标。通过组态王软件和S7-200联机调试，模拟加热炉自动上料控制系统的生产现场，也取得了很好的效果。 关键词：S7-200PLC，加热炉，自动上料，STEP-7 PLC-BASED AUTOMATIC FEEDING OF THE FURANCE CONTROL SYSTEM ABSTRACT Programmable logic controller is a microprocessor, memory, input-output interface with the interruption of the system in one device, has been widely used in machine building, metallurgy, chemical industry, energy, transportation and other industries. PLC logic with strong computing power, can achieve a variety of switch from the simple to the complex logic control, in the process of modern industrial production, there are many analog continuous change, such as temperature, pressure, flow, level, etc., Programmable logic controller can be realized on the analog control. The design for the furnace control system for automatic feeding, taking into account the production of the actual works to the common industrial production for the main furnace, analysis and design of its control system for automatic feeding. The controlled car track in the production of the action, the production on track with trip switch, so that cars can automatically send a signal to control the opening and closing door, at the same time discharging car forward and backward process can be self-fulfilling. The design is completed the main circuit, auxiliary circuit design. In addition to design a control system corresponds to the ladder, through the PLC programming procedures, the STEP-7 software and S7-200 online debugging, the successful simulation of the entire production engineering, a good run, reaching the design goals. King view through S7-200 sof