C#使用MX Component实现三菱PLC软元件数据采集的完整步骤(仿真)

前言

本文介绍了如何使用三菱提供的MX Component插件实现对三菱PLC软元件数据的读写,记录了使用计算机仿真,模拟PLC,直至完成测试的详细流程,并重点介绍了在这个过程中的易错点,供参考。

用到的软件:

  1. PLC开发编程环境GX Works2,GX Works2下载链接 https://www.mitsubishielectric-fa.cn/site/file-software-detail?id=18

2.实现计算机与可编程控制器通信的软件工具MX Component,MX Component下载链接 https://www.mitsubishielectric-fa.cn/site/file-software-detail?id=27
配置流程:
1.GX Works2的配置流程:
(1)新建工程,选择PLC型号;

(2)修改PLC参数,PLC文件设置=>使用一下文件=>命名,设置合适的容量大小,扩容为了后期测试时使用(该操作可选);

(3)修改软元件设置,使用上一步骤中的扩容操作,三菱PLC设计上位机数据操作区一般选择D区,R区和W区亦可(该操作可选);

(4)调试中选择=>模拟开始,出现Simulator窗口,Mode和RUN绿灯长亮即表示仿真正常;

2.MX Component配置流程:

(1)找到MX Component安装的对应软件,选择"Communication Setup Utility",以管理员身份运行;

(2)添加Logical Station Number(通道号);(这里以99为例)

(3)由于本案例采用的是GX Works2仿真方案,选择GX Simulator2,选择CPU型号,下一步即可;

(4)选择描述,,以Test为例;

(5)配置完成后,进行测试,显示successful表示连接成功;连接成功后可以关掉该软件,不影响正常通讯;

3.C#上位机的程序测试:

复制代码
using ActUtlTypeLib;
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading;
using System.Threading.Tasks;
using System.Windows.Forms;

namespace MELSEC.MX.Test
{
    public partial class Form1 : Form
    {
        private ActUtlType m_plc;
        public Form1()
        {
            InitializeComponent();
            m_plc = new ActUtlType();
        }

        private void Form1_Load(object sender, EventArgs e)
        {
            cmb_LogicalStationNumber.Items.Clear();
            for (int i = 1;i<=256;i++)
            {
                cmb_LogicalStationNumber.Items.Add(i.ToString());
            }
        }
        
        private void btn_Comm_Click(object sender, EventArgs e)
        {
            try
            {
                int logNUM = Convert.ToInt16(cmb_LogicalStationNumber.Text);
                m_plc.ActLogicalStationNumber=logNUM;
                m_plc.ActPassword = "";
                if (m_plc.Open() != 0)
                {
                    btn_Comm.BackColor = Color.Gray;
                    btn_Comm.Text = "未建立链接";
                    m_plc.Close();
                    m_plc = null;
                }
                else
                {
                    btn_Comm.BackColor = Color.Green;
                    btn_Comm.Text = "已连接";
                }
            }
            catch (Exception )
            {
                throw;
            }
        }

        private void btn_Read_Click(object sender, EventArgs e)
        {
            try
            {
                Thread thread = new Thread(() =>
                {
                    while (true)
                    {
                        txb_D0.Invoke(new Action(() =>
                        {
                            txb_D0.Text = ReadDeviceValue("D0", 2)[0].ToString();
                            txb_D1.Text = ReadDeviceValue("D0", 2)[1].ToString();
                            txb_R100.Text = ReadDeviceValue("R100", 1)[0].ToString();
                            txb_W500.Text = ReadDeviceValue("W500", 1)[0].ToString();
                        }));
                        Thread.Sleep(300);
                    }
                });
                thread.IsBackground = true;
                thread.Start();
            }
            catch (Exception)
            {

                throw;
            }
        }

        private string[] ReadDeviceValue(string DeviceName,int NumberOfData)
        {
            int iReturnCode;
            short[] arrDeviceValue;
            string szDeviceName;
            string[] arrData= { };
            int iNumberOfData;
            try
            {
                szDeviceName = string.Join("\n", DeviceName);
                iNumberOfData = Convert.ToInt32(NumberOfData);
                arrDeviceValue = new short[iNumberOfData];
                iReturnCode = m_plc.ReadDeviceBlock2(szDeviceName, iNumberOfData, out arrDeviceValue[0]);
                if (iReturnCode == 0)
                {
                    arrData = new string[iNumberOfData];
                    for (int i = 0; i < iNumberOfData; i++)
                    {
                        arrData[i] = arrDeviceValue[i].ToString();
                    }
                    return arrData;
                }
                return arrData;
            }
            catch (Exception ex)
            {
                MessageBox.Show(ex.Message, Name, MessageBoxButtons.OK, MessageBoxIcon.Error);
                return arrData;
            }
        }
    }
}

Demo演示