問題是我是一個PLC工程師,想用寫一個上位機程序和三菱FX3U通訊,PLC的IP地址為192.168.0.250,端口號為5551.要求顯示X0到X7,輸出顯示Y0到Y7,還有M0到M9切換按鈕,輸出格式為直接打開的exe文件
以下是使用C#開發的三菱FX3U上位機通信程序實現方案,包含可直接運行的EXE文件生成方法:
一、開發環境配置
開發工具:
Visual Studio 2022 (社區版)
.NET Framework 4.8
通信參數
NuGet包:Mx.Component.Melsec(三菱協議庫)
var config = new MelsecConfiguration {
    ProtocolType = ProtocolType.TCP,
    Host = "192.168.0.250",
    Port = 5551,
    CpuType = CpuType.FX3U,
    ConnectTimeout = 3000
};
二、界面設計(Windows Forms)
<!-- MainForm.Designer.cs -->
this.Controls.AddRange(new Control[] {
    // X0-X7狀態指示燈
    new StatusLight { Name="x0", Location=new Point(20,20) },
    // ...重復創建x1-x7
    
    // Y0-Y7狀態顯示
    new StatusLight { Name="y0", Location=new Point(120,20) },
    // ...重復創建y1-y7
    
    // M0-M9切換按鈕
    new ToggleButton { Name="m0", Text="M0", Location=new Point(220,20) },
    // ...創建m1-m9
    
    // 狀態欄
    new StatusStrip {
        Items = { 
            new ToolStripStatusLabel { Name="lblStatus" }
        }
    }
});
三、核心通信代碼
public partial class MainForm : Form {
    private MelsecFxPLC plc;
    
    // 初始化PLC連接
    private void ConnectPLC() {
        plc = new MelsecFxPLC(config);
        var result = plc.Connect();
        
        if (result.IsSuccess) {
            timer1.Interval = 500;  // 500ms輪詢周期
            timer1.Start();
        }
    }
    // 定時讀取狀態
    private void timer1_Tick(object sender, EventArgs e) {
        // 批量讀取X/Y狀態
        var xStatus = plc.ReadBytes("X0", 1);
        var yStatus = plc.ReadBytes("Y0", 1);
        
        // 更新指示燈
        UpdateLights(xStatus, "x");
        UpdateLights(yStatus, "y");
    }
    // M按鈕點擊事件
    private void mButton_Click(object sender, EventArgs e) {
        var btn = sender as ToggleButton;
        plc.WriteBit($"M{btn.Tag}", btn.Checked);
    }
}
四、可視化組件類
// 狀態指示燈控件
public class StatusLight : PictureBox {
    public StatusLight() {
        Size = new Size(30, 30);
        BackColor = Color.Silver;
    }
    public bool Active {
        set => BackColor = value ? Color.Lime : Color.Red;
    }
}
// 切換按鈕控件
public class ToggleButton : CheckBox {
    public ToggleButton() {
        Appearance = Appearance.Button;
        TextAlign = ContentAlignment.MiddleCenter;
        Size = new Size(50, 30);
    }
}
五、項目打包部署
發布設置:
項目屬性 → 發布 → 選擇"從CD/USB安裝"
包含.NET Framework 4.8運行庫
生成單文件EXE
依賴文件
├── MelsecFx.dll
├── Newtonsoft.Json.dll
└── Mx.Component.Core.dll
六、協議處理流程圖
sequenceDiagram
    participant UI as 上位機
    participant PLC as FX3U PLC
    
    UI->>PLC: TCP Connect(192.168.0.250:5551)
    PLC-->>UI: 連接成功響應
    
    loop 500ms輪詢
        UI->>PLC: 讀取X0-X7(0x00B0命令)
        PLC-->>UI: X狀態數據
        UI->>PLC: 讀取Y0-Y7(0x00B0命令)
        PLC-->>UI: Y狀態數據
    end
    
    UI->>PLC: 寫入M位(0x1401命令)
    PLC-->>UI: 寫入確認
七、測試驗證步驟
PLC準備:
; 測試程序
LD M8000
MOV K85 K1Y0  // Y0-Y7循環顯示
上位機操作檢查表: