水塔水位系统plc硬件设计.doc

目录
摘要……………………………………………………………………...1
Abstract………………………………………………………………….2
1引言……………………………………………………………………3
2设计方案及选择………………………………………………………4
2.1设计方案………………………………………………………………………..4
2.2方案选择………………………………………………………………………..4
3水塔水位系统PLC硬件设计……………………………………………….5
3.1PLC逻辑控制器………………………………………………………………..5
3.1.1可编程控制器的产生及发展………………………………………………5
3.1.2PLC基本结构………………………………………………………………6
3.1. 3LC的特点…………………………………………………………………..8
3.1.4LC工作原理………………………………………………………………..9
3.2要求独立完成水塔水位控制PLC系统设计与调试…………………………11
3.3位系统控制电路……………………………………………………………….12
3.4输入/输出分配…………………………………………………………………12
3.4.1列出水塔水位控制系统PLC的输入/输出接口分配表…………………12
3.4.2系统的输入/输出设备…………………………………………………….13
4塔水位控制系统PLC软件设计……………………………………………13
4.1工作过程……………………………………………………………………….13
4.2程序流程图…………………………………………………………………….14
4.3梯形图………………………………………………………………………….15
4.4 水塔水位控制系统梯形图的对应指令表……………………………………16
5总结……………………………………………………………………17
参考文献、资料……………………………………………………………………..18
致谢…………………………………………………………………………………..19

摘要
在工农业生产过程中，经常需要对水位进行测量和控制。水位控制在日常生活中应用也相当广泛，比如水塔、地下水、水电站等情况下的水位控制。而水位检测可以有多种实现方法，如机械控制、逻辑电路控制、机电控制等。本文采用PLC逻辑控制器进行主控制安装一个自动测水位装置。利用水的导电性连续地全天候地测量水位的变化，把测量到的水位变化转换成相应的电信号，主控台应用MCGS组态软件对接收到的信号进行数据处理，完成相应的水位显示、故障报警信息显示、实时曲线和历史曲线的显示，使水位保持在适当的位置。

[关键词] ： 水位控制、PLC逻辑控制器、菱PLC fx2n

Abstract

In the industrial and agricultural production process, often need to measure and control the water level. Water level control in daily life are very wide application, such as water tower, groundwater, hydropower station of water level control. And the water level detection can have a variety of realization method, such as mechanical control, logic circuit control, mechanical and electrical control, etc. In this paper, the PLC control, the installation of a water tank automatic water level measurement device. The conductivity of the water is used for measuring the change of water level to round-the-clock, to measure the change of water level converted into electrical signal, ZhuKongTai application MCGS software docking received signal data processing, complete the corresponding level display, fault alarm information display, real-time curves and history of the curve shows, to bring the level remain in place.

 [key words] : water level control, mitsubishi PLC fx2n