【正文】 PLC 開放實(shí)驗(yàn)設(shè)計 PLC（可編程序控制器）是以微控制器為核心，把計算機(jī)技術(shù)、自動控制技術(shù)、通信網(wǎng)絡(luò)技術(shù)融合在一起的一種先進(jìn)的自動控制裝置。s new generation of text Display, is a simple manmachine interface device, no special configuration of HMI software, the use of Micro / WIN SP4 to On the version of Chinese language interface in the configuration wizard to TD [5] . The configuration opening in TD400C experiments, show the user through the configuration Menu, the alarm menu, and interact with S7200 CPU, CPU storage area for data access and editing, enabling small Type of humanputer interaction function with the control system, such as basic experiments with automatic round trip transportation control program can be realized Through the control panel to control the car motion state, and in position to reach both ends of the alarm screen limit, while TD400C modify the car to stay at the ends of time, so that the experimental effect is more rich and vivid, but also to enable students to understand the master Production site using the actual control equipment. (2) Highspeed counter, highspeed output, internal and external interrupts and other useful special features, through an open experiment Learn and master, such as the first highspeed output by PTO (pulse train) output, and achieve the highspeed counter Highspeed output of the PTO HSC0 count, the interrupt function by repeated HSC0 count, a programming Adjust the PWM (pulse width modulation) highspeed output, the timer interrupt to implement a second counter, and the current count value, PWM output duty cycle and other related content displayed on the TD 400C. (3) The main module with the PT100 temperature transmitter will be converted from 0 to 100 degrees C 0 ~ 10V analog input received as Into the CPU, the heater, fan and other physical control objects connected to the digital output on the CPU can be realized on analog Data transformation, manual PID control programming, using the configuration wizard to plete the PID, PID parameter selftuning function of the experiment, so that Students deeply understand and master the industrial field of analog PID control knowledge and implementation. (4)Two S7200 series PLC via RS232 munication cable, you can use the PPI protocol to form a Single master station munication work, can be PPI point to point munication experiment, to achieve data exchange between the two PLC, such as the ~ master map to the slave state of the ~ , from the station ~ of the state map to the main station ~ , the work will allow students to experience the simple wizard to use reading and writing instruction, and extended through the formation of PPI works can be implemented Control functions are more plex. 4 (5) S7200 CPU39。 1 S7200 based modular training facilities open to experimental designPLC PLC (programmable logic controller) is a microcontroller core, the puter technology, automatic control technology。 munication work together work technology is an advanced automatic control device. The current PLC has bee the three major branch of modern industrial automation Column (PLC, robotics, CAD / CAM), widely used in various fields of automation and control systems, various types of enterprises Industry require a certain amount of practical experience with such talent. Thus, PLC application technology has bee the industrial automation technology relevant professional technical personnel and university students to learn important lessons. Siemens SIMATIC S7200 series are small PLC, its high price in