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
(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:
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