功能的直观监控。通过硬件部分和软件部分的巧妙结合，多次的程序改写调试、设计思路的更新和工艺的完善，实现了对电磁阀耐久性能的测试。综上所述，用PLC控制对电磁阀的使用寿命进行研究有着极其重要的意义。
关键词：
; ; PLC; 上位机
电磁阀耐久性
Abstract
With the rapid development of industrial control area, automation technology in industrial control process has a more and more important position, the electromagnetic valve as automation instrument of a kind of actuators and his system simple, inexpensive, action quick, less power, appearance and the advantages of thorough popular feeling． Electromagnetic valve in the industrial control system of frequently used in the adjustment of the medium, flow rate, and the direction of the parameters of the speed and other．Electromagnetic valve can cooperate with different circuit to achieve the desired control, and control precision and flexibility to be able to guarantee．Electromagnetic valve has a lot of kinds, different electromagnetic valve control system in different positions of the work, the most common is check valve, the relief valve, direction control valves, speed regulator, etc．
With more and more kinds of electromagnetic valve, performance more and more security improved, making in recent years the utilization rate of electromagnetic valve is continue to rise, and the universal high praise by everybody．But with the use of electromagnetic valve field is more and more extensive, electromagnetic valve various performance requirements also gradually increasing, gradually thinning, not only on the function, and in the electromagnetic valve on the service life of also is everyone's attention This topic is for the durability of the electromagnetic valve test
design．The purpose is to solve the electromagnetic valve in the durability test questions．This paper mainly related to PLC to control the core building control circuit, the service life of solenoid valve testing methods and the design of control system process． Use PLC to control the durability test electromagnetic valve circuit improve the reliability of system and automation．Save a lot of activity components, reduced size, lower power consumption and save cost．
This paper is mainly in two parts, hardware and software design．Hardware mainly including electromagnetic valve durability testing platform, monitoring platform and its corresponding distribution system design．Software part includes realize electromagnetic valve testing procedure, test the durability of the state of the real－time monitoring, etc．In the test process, through the constant pressure of water, let the electromagnetic valve opening in certain time, closing time, through the provisions for durability test number． And the PC program design, realize the system function monitoring intuitive． Through the hardware and software of the clever union, in many of the procedures rewrite debugging, design thinking and renew the improvement of the process, realize the electromagnetic valve durability test． To sum up, with PLC to control the use of electromagnetic valve life research has the extremely vital significance．
Key words: Solenoid valve; Durability; PLC; Host
目 录
第一章绪论 ................................................... 1 1．1概述 ................................................. 1 1．2 电磁阀的介绍及其研究意义 ............................. 1 1．2．1 课题背景和意义 ................................. 1 1．2．2 水用电磁阀的发展 ............................... 2 1．3 电磁阀耐久性测试设计特点 ............................. 2 1．4 本次设计的主要工作及论文结构安排 ..................... 2 第二章总体设计方案及思路 ..................................... 4 2． 1 系统设计要求 ........................................ 4 2． 2 控制系统总体方案 .................................... 4 2． 3 基本工作过程 ........................................ 5 第三章控制系统硬件设计 ....................................... 6 3．1 系统元器件选型 ....................................... 6 3．1．1 PLC的选型原则及结果 ........................... 6 3．1．2 S7－200 PLC的介绍 ............................. 6 3．1．3 CPU的选型 ..................................... 7 3．2 控制系统I/O点分配 ................................... 7 3．3 外围元器件介绍 ....................................... 8 3．3．1 固态继电器 ..................................... 8 3．3．2 水泵 .......................................... 11
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