基于S7-200的温度控制系统设计论文.doc

毕 业 论 文题 目：  摘 要 温度是各种工业生产和科学实验中最普遍、也是最重要的热工参数之一。温度控制的精度对产品或实验结果会产生重大的影响。温度控制的模式多样，而PLC可靠性高，抗干扰能力强易学易用系统的采用PID算法脉宽调制。；；； Abstract Temperature is the most universal and important industrial parameter in all kinds of technical produce and scientific experiment. The manipulative precision of temperature will take a great effect on production or experimental result. In many cases，we need to control the temperature of various types of furnace, heat treatment furnaces, reactors .But they are complex and changing .As a result, its control over demand regulator .The mode of temperature control is various. The programmable logic controller(PLC) is Reliable、not easily to be jamming and easily to be learned and used , welcomed by workers and widely used in industry. Programmable controller (PLC) is a digital electronic computing operating system, designed for applications in industrial environments designed. It uses a programmable memory for storage in its internal implementation of logic operations, sequence control, timing, calculation and arithmetic operations, such as operating instructions, and through digital and analog input and output, control of various types of machinery or the production process. Configuration is to use application software to provide the tools, methods, and to complete the works in the course of a specific task. Configuration software applications is broad, it can be applied to power systems, water supply systems, petroleum, chemical and other fields of data acquisition and supervisory control and process control and many other fields. Before the concept of the configuration, in order to achieve a particular task, using the preparation process is achieved. Programming is not only a heavy workload, long and easy to make mistakes, can not guarantee period. The emergence of the configuration software can solve the problem. The Kingview can help complete the task in a few days. This thesis mainly introduces a design of temperature control system wi