基于MCGS的PLC液体混合控制系统设计

摘要

本组课题是对液体自动混合装置的模拟控制，实现液体混合装置的自动添加液体、自动混合等自动控制功能。在本设计的梯形图设计中是大量运用计时器和顺序控制继电器指令来完成的。在PLC程序设计的基础上结合有关的外围设备形成一个易于工业控制的系统整体，在易于扩展其功能的原则而设计。本监控系统采用PLC为控制核心，具备自动混合两种液体的功能，由传感器检测储藏罐中的液面高度，按顺序加入A和B两种液体，搅拌40s后放出混合液体。过程监控上，我们采用的是MCGS组态软件，这是我国自主研发的组态软件，适用于各品牌的PLC。

在课程设计中主要进行的是设备的基本机构图，混合装置控制的模拟实验面板图，PLC 的选型，外部硬件接线图，以及绘制所要实现的功能图，进而在GX_Developer与GX.Simulator中仿真调试，输出对应的指令表；在MCGS中设计监控的人机界面，对于储藏罐以及传感器和电磁阀和流动块的属性设置，同时绘制历史报表，最后将PLC中的程序同步到MCGS中，进行仿真调试，实现界面的实时监控，以及历史数据和曲线的实时监测。关键词：液体自动混合，可编程控制器PLC，MCGS组态软件

Abstract

This topic is for liquid automatically mixing device simulation control，the fulfilling liquid mixing device automatically add liquid，automatic mixing automatic control function.In this design ladder diagram design is application of a timer and sequence control relay instructions to finish. On the basis of the PLC program design combined with related peripheral devices formed an easy to industrial control of the whole system，easy to expand its function in the principle of design. The monitor system adopts PLC as control core，with automatic mixing two liquids function by the tanks sensor test highly liquid surface，in order to join A and B two liquids，stirring 3min after release mixture liquid. Process monitoring, we use is MCGS software，this is our country self-developed configuration software，applicable to the brand of PLC.

In the course design of main equipment of the basic organization chart is mixing device control simulation experiments of panel figure，PLC selection，external hardware hookup and mapping to achieve the functional diagram，and in the GX_Developer GX. With weathering steel during commissioning，output of simulation corresponding instruction form；In the MCGS in design human-machine interface，for monitoring and tanks sensor and solenoid and flow pieces of attribute to set，while drawing history statements and will last a program in a PLC synchronization to MCGS，debugging realize simulation，real-time monitoring of the interface and the history data and curve of real-time monitoring.

Keywords:liquid automatically mixing，PLC programmable controller，MCGS

目录

前言 (5)

1 PLC及液体混合机的PLC控制 (6)

1.1 PLC的由来及其定义 (6)

1.2 PLC的发展历程 (6)

1.3 PLC与MCGS通讯要求 (7)

1.4 MCGS运行环境 (8)

2基于FX2N的液体混合实际控制系统设计 (9)

2.1 选择PLC型号 (9)

2.2 I/O分配表 (9)

2.3 外部接线图以及控制要求 (10)

3工作过程分析 (11)

3.1 工作过程分析 (11)

3.2 详细过程分析 (12)

4软件设计 (14)

4.1 手动部分软件设计 (14)

4.2自动部分软件设计 (16)

4.3 指令表 (18)

5基于MCGS的虚拟混合液位控制系统设计 (19)

5.1组建系统工程 (19)

5.2液体自动混合画面中构件的属性设置 (20)

6. MCGS与PLC通讯与工程模拟 (22)