三菱PLC通讯 基于官方项目Sample2010的借鉴二次开发---C#连接三菱PLC进行IO监控

环境：打开三菱PLC安装目录下，Act>Samples>Vcs.NET>Sample2010>bin>Debug目录下分别加载以下 dll

WinForm前台设计：(图中的两紫色方块控件是从官方提供的Sample2010（在Act>Samples>Vcs.NET目录下）将这两个控件copy到Form1窗口中即可 )

关于三菱PLC的IO监控代码：

 public partial class Form1 : Form{private static string iniPath = Application.StartupPath + "\\IO.ini";//通过读取ini文件动态创建的but集合static List butList = new List();public Form1(){InitializeComponent();}private void Form1_Load(object sender, EventArgs e){{//加载控件if (!File.Exists(iniPath)){MessageBox.Show("系统未找到指定文件：" + iniPath);}}}#region 建立连接//连接private void button1_Click(object sender, EventArgs e){//逻辑站axActUtlType1.ActLogicalStationNumber = int.Parse(this.textBox1.Text);//密码axActUtlType1.ActPassword = this.textBox2.Text;//打开plcint status = axActUtlType1.Open();if (status == 0){LoadInputPage(iniPath, ref butList);LoadOutputPage(iniPath, ref butList);Monitor_IO(butList);MessageBox.Show("连接成功！");}}//断开连接private void button2_Click(object sender, EventArgs e){axActUtlType1.Close();ClearCreatControl();}#endregion#region 读写//读private string btn_ReadDeviceRandom(string text){int iReturnCode;				//Return codeString szDeviceName = text;		//List data for 'DeviceName'int iNumberOfData = 1;			//Data for 'DeviceSize'short[] arrDeviceValue  = new short[iNumberOfData];		    //Data for 'DeviceValueint iNumber;					//Loop counterSystem.String[] arrData;	    //Array for 'Data'try{iReturnCode = axActUtlType1.ReadDeviceRandom2(szDeviceName,iNumberOfData,out arrDeviceValue[0]);}catch (Exception exception){MessageBox.Show(exception.Message, Name,MessageBoxButtons.OK, MessageBoxIcon.Error);return null;}if (iReturnCode == 0){//Assign the array for the read data.arrData = new System.String[iNumberOfData];//Copy the read data to the 'arrData'.for (iNumber = 0; iNumber < iNumberOfData; iNumber++){arrData[iNumber] = arrDeviceValue[iNumber].ToString();}//Set the read data to the 'Data', and display it.return arrData[0];}return null;}//写private void btn_WriteDeviceRandom(object sender, EventArgs e){Button bt = sender as Button;int iReturnCode;				//Return codeString szDeviceName = bt.Name;		//List data for 'DeviceName'int iNumberOfData = 1;			//Data for 'DeviceSize'short[] arrDeviceValue = new short[iNumberOfData];		    //Data for 'DeviceValue'string value = btn_ReadDeviceRandom(bt.Name);value = (value == "1")? value = "0" : value = "1";arrDeviceValue[0] = short.Parse(value);try{//The WriteDeviceRandom2 method is executed.iReturnCode = axActUtlType1.WriteDeviceRandom2(szDeviceName,iNumberOfData,ref arrDeviceValue[0]);}//Exception processing			catch (Exception exception){MessageBox.Show(exception.Message, Name,MessageBoxButtons.OK, MessageBoxIcon.Error);return;}}#endregion#region 控件的动态创建相关private void ClearCreatControl() {this.tabPage1.Controls.Clear();this.tabPage2.Controls.Clear();butList.Clear();}//加载输入IO页private void LoadInputPage(string iniPath, ref List butList) {if (!File.Exists(iniPath)){return;}string section = "Input";Dictionary inputDic = INI.GetINISectionDic(iniPath,section);TableLayoutPanel tlp = Creat_Table(inputDic, section, ref butList);this.tabPage1.Controls.Add(tlp);}//加载输出IO页面private void LoadOutputPage(string iniPath, ref List butList) {if (!File.Exists(iniPath)){return;}string section = "Output";Dictionary ouputDic = INI.GetINISectionDic(iniPath, section);TableLayoutPanel tlp = Creat_Table(ouputDic, section, ref butList);this.tabPage2.Controls.Add(tlp);}//创建button控件的方法private List Creat_Button(Dictionary dic, string section, ref List butList){List listBut = new List();foreach (KeyValuePair kv in dic){Button but = new Button();but.Name = kv.Key;but.Text = kv.Value;but.Size = new Size(200, 60);but.Font = new Font("隶书", 16, FontStyle.Bold);but.TextAlign = ContentAlignment.MiddleCenter;//是否允许绑定按钮事件。由INI_IOItem类中的枚举决定，其中value = 1的被定义为具有点击事件if (section == "Input"){//给button绑定出发事件but.Click += btn_WriteDeviceRandom;}butList.Add(but);listBut.Add(but);}return listBut;}//创建表格控件的方法private TableLayoutPanel Creat_Table(Dictionary dic, string section, ref List butList){//创建一个动态TableLayoutPanel控件TableLayoutPanel table = new TableLayoutPanel();int dataCount = (dic.Count == 0) ? 1:dic.Count ;//获取父节控件的大小int tSize1 = tabControl1.Width - 5;int tSize2 = dataCount * 60 / 5;if (dataCount <= 5){tSize2 = dataCount * 60;}//设置table大小table.Size = new Size(tSize1, tSize2);//显示table边框//table.CellBorderStyle = TableLayoutPanelCellBorderStyle.OutsetPartial;int c = 5, r = dic.Count % c == 0 ? dic.Count / c : dic.Count / c + 1;//动态添加行列table.RowCount = r;//设置行            for (int i = 0; i < r; i++){table.RowStyles.Add(new RowStyle(SizeType.Percent, tSize2 / dataCount));}table.ColumnCount = c;//设置列            for (int i = 0; i < c; i++){table.ColumnStyles.Add(new ColumnStyle(SizeType.Percent, tSize1 / dataCount));}//将创建的button控件添加至表格table.Controls.AddRange(Creat_Button(dic, section, ref butList).ToArray());return table;}#endregion#region 线程相关private void Monitor_IO(List butList) {if ( butList == null){return;}List onList = butList;Thread t = new Thread(delegate () {try{while (true){foreach (Button but in butList){if (btn_ReadDeviceRandom(but.Name) == "0"){but.BackColor = Color.Red;}else if (btn_ReadDeviceRandom(but.Name) == "1"){but.BackColor = Color.Green;}Application.DoEvents();}Thread.Sleep(200);}}catch (Exception){}});t.IsBackground = true;t.Start();}#endregion}

INI读取类：

 class INI{/// 
/// 获取某个指定节点(Section)中所有KEY和Value/// 
/// 节点名称/// 返回值的内存地址,每个之间用\0分隔/// 内存大小(characters)/// Ini文件/// 内容的实际长度,为0表示没有内容,为nSize-2表示内存大小不够[System.Runtime.InteropServices.DllImport("kernel32.dll", CharSet = System.Runtime.InteropServices.CharSet.Auto)]private static extern uint GetPrivateProfileSection(string lpAppName, IntPtr lpReturnedString, uint nSize, string lpFileName);public static Dictionary GetINISectionDic(string iniFile, string section){uint MAX_BUFFER = 32767;string[] items = null;//分配内存IntPtr pReturnedString = System.Runtime.InteropServices.Marshal.AllocCoTaskMem((int)MAX_BUFFER * sizeof(char));uint bytesReturned = GetPrivateProfileSection(section, pReturnedString, MAX_BUFFER, iniFile);if (!(bytesReturned == MAX_BUFFER - 2) || (bytesReturned == 0)){string returnedString = System.Runtime.InteropServices.Marshal.PtrToStringAuto(pReturnedString, (int)bytesReturned);items = returnedString.Split(new char[] { '\0' }, StringSplitOptions.RemoveEmptyEntries);}System.Runtime.InteropServices.Marshal.FreeCoTaskMem(pReturnedString);     //释放内存//无结果返回空if (items == null){return null;}Dictionary dic = new Dictionary();foreach (string item in items){if (!item.Contains("=")){continue;}string[] part = item.Split('=');dic.Add(part[0], part[1]);}return dic;}}

INI文件内容（IO点位）

效果展示：（注意，关闭窗口时需要断开连接）

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