{"id":91548,"date":"2026-08-07T23:41:16","date_gmt":"2026-08-07T15:41:16","guid":{"rendered":"https:\/\/www.wsisp.com\/helps\/91548.html"},"modified":"2026-08-07T23:41:16","modified_gmt":"2026-08-07T15:41:16","slug":"c-%e5%ae%9e%e6%88%98%e3%80%91%e7%94%a8-nmodbus-%e5%bf%ab%e9%80%9f%e6%90%ad%e5%bb%ba-modbus-rtu-%e5%b7%a5%e4%b8%9a%e9%80%9a%e4%bf%a1%e7%b3%bb%e7%bb%9f%ef%bc%88%e5%90%ab%e5%ae%8c%e6%95%b4%e6%ba%90","status":"publish","type":"post","link":"https:\/\/www.wsisp.com\/helps\/91548.html","title":{"rendered":"C# \u5b9e\u6218\u3011\u7528 NModbus \u5feb\u901f\u642d\u5efa Modbus RTU \u5de5\u4e1a\u901a\u4fe1\u7cfb\u7edf\uff08\u542b\u5b8c\u6574\u6e90\u7801\uff09"},"content":{"rendered":"

\u672c\u6587\u5c06\u5e26\u4f60\u4ece\u96f6\u5f00\u59cb，\u4f7f\u7528 C# \u548c NModbus \u5e93\u5b9e\u73b0\u4e00\u4e2a\u5b8c\u6574\u7684 Modbus RTU \u5de5\u4e1a\u901a\u4fe1\u7cfb\u7edf\u3002<\/p>\n

\u7b2c\u4e00\u7ae0：\u9879\u76ee\u80cc\u666f\u4e0e\u9700\u6c42\u5206\u6790<\/h2>\n

1.1 \u4e3a\u4ec0\u4e48\u9009\u62e9 Modbus？<\/h3>\n

Modbus \u662f\u5de5\u4e1a\u9886\u57df\u5e94\u7528\u6700\u5e7f\u6cdb\u7684\u901a\u4fe1\u534f\u8bae\u4e4b\u4e00，\u7531 Modicon（\u73b0 Schneider Electric）\u4e8e 1979 \u5e74\u63a8\u51fa\u3002<\/p>\n

**\u6838\u5fc3\u4f18\u52bf：**
\n– 🔓 **\u5b8c\u5168\u5f00\u653e**：\u514d\u8d39\u4f7f\u7528，\u65e0\u9700\u6388\u6743\u8d39
\n– 🔧 **\u7b80\u5355\u53ef\u9760**：\u4e3b\u7ad9-\u4ece\u7ad9\u67b6\u6784，\u6613\u4e8e\u5b9e\u73b0
\n– 🌐 **\u5e7f\u6cdb\u652f\u6301**：\u51e0\u4e4e\u6240\u6709 PLC\u3001\u4f20\u611f\u5668\u90fd\u652f\u6301
\n– 📡 **\u591a\u79cd\u4ecb\u8d28**：\u652f\u6301 RS-232\u3001RS-485\u3001TCP\/IP<\/p>\n

**\u5e94\u7528\u573a\u666f：**
\n– 🏭 \u5de5\u4e1a\u81ea\u52a8\u5316\u751f\u4ea7\u7ebf
\n– \u26a1 \u7535\u529b\u76d1\u63a7\u7cfb\u7edf
\n– 🌡\ufe0f \u6e29\u6e7f\u5ea6\u4f20\u611f\u5668\u6570\u636e\u91c7\u96c6
\n– 🤖 \u673a\u5668\u4eba\u63a7\u5236\u7cfb\u7edf<\/p>\n

1.2 Modbus RTU vs TCP<\/h3>\n

<\/h3>\n

| \u5bf9\u6bd4\u9879 | Modbus RTU | Modbus TCP |
\n|——–|———–|————|
\n| **\u7269\u7406\u5c42** | RS-232 \/ RS-485 | \u4ee5\u592a\u7f51 |
\n| **\u4f20\u8f93\u4ecb\u8d28** | \u4e32\u53e3\u7ebf | \u7f51\u7ebf |
\n| **\u4f20\u8f93\u901f\u5ea6** | \u6700\u9ad8 115200 bps | 100Mbps+ |
\n| **\u7f51\u7edc\u62d3\u6251** | \u603b\u7ebf\u578b | \u661f\u578b |
\n| **CRC \u6821\u9a8c** | \u9700\u8981 | \u4e0d\u9700\u8981 |
\n| **\u8ddd\u79bb\u9650\u5236** | 1200 \u7c73（RS-485） | 100 \u7c73（\u5355\u6bb5） |
\n| **\u9002\u7528\u573a\u666f** | \u77ed\u8ddd\u79bb\u3001\u5f3a\u5e72\u6270 | \u957f\u8ddd\u79bb\u3001\u5927\u6570\u636e\u91cf |<\/p>\n

\n

1.3 \u672c\u9879\u76ee\u529f\u80fd\u6e05\u5355<\/h3>\n

**\u529f\u80fd\u5217\u8868：**
\n1. \u2705 \u4e32\u53e3\u6253\u5f00\/\u5173\u95ed\u7ba1\u7406
\n2. \u2705 \u8bfb\u53d6\u7ebf\u5708\u72b6\u6001（\u5f00\u5173\u91cf\u8f93\u5165）
\n3. \u2705 \u8bfb\u53d6\u4fdd\u6301\u5bc4\u5b58\u5668（\u6a21\u62df\u91cf）
\n4. \u2705 \u5199\u5165\u5355\u4e2a\u5bc4\u5b58\u5668
\n5. \u2705 \u6279\u91cf\u5199\u5165\u591a\u4e2a\u5bc4\u5b58\u5668
\n6. \u2705 \u5b9e\u65f6\u65e5\u5fd7\u663e\u793a
\n7. \u2705 \u5f02\u5e38\u81ea\u52a8\u5904\u7406<\/p>\n

1.4 \u5f00\u53d1\u73af\u5883<\/p>\n

| \u5de5\u5177 | \u7248\u672c | \u7528\u9014 |
\n|——|——|——|
\n| Rider | 2016 | IDE \u5f00\u53d1\u73af\u5883 |
\n| .NET Framework | 4.8 | \u8fd0\u884c\u65f6\u6846\u67b6 |
\n| NModbus | 3.0.83 | Modbus \u901a\u4fe1\u5e93 |
\n| Modbus Slave | 7.x | \u8c03\u8bd5\u6a21\u62df\u5668 |<\/p>\n

\u7b2c\u4e8c\u7ae0：\u6280\u672f\u9009\u578b\u4e0e\u73af\u5883\u51c6\u5907<\/h2>\n

2.1 NModbus \u5e93\u7b80\u4ecb<\/h3>\n

[NModbus](https:\/\/github.com\/NModbus\/NModbus) \u662f\u4e00\u4e2a\u7eaf\u6258\u7ba1\u7684 .NET Modbus \u5b9e\u73b0，\u652f\u6301 RTU\u3001TCP\u3001UDP \u7b49\u591a\u79cd\u4f20\u8f93\u65b9\u5f0f\u3002<\/p>\n

\u4e3b\u8981\u7279\u6027：
\n\u2728 \u652f\u6301 .NET Framework 4.6+ \/ .NET 6+ \/ .NET Standard 1.3+
\n\u2728 \u5b8c\u6574\u7684 Modbus \u529f\u80fd\u7801\u652f\u6301
\n\u2728 \u5f02\u6b65 API \u652f\u6301
\n \u2728 \u7ebf\u7a0b\u5b89\u5168\u8bbe\u8ba1<\/p>\n

\n2.2 NuGet \u5305\u5b89\u88c5<\/h3>\n

\u5728 Rider \u4e2d\u901a\u8fc7 NuGet \u5305\u7ba1\u7406\u5668\u5b89\u88c5：<\/p>\n

Install-Package NModbus
\nInstall-Package NModbus.Serial<\/p>\n

\n2.3 \u4e32\u53e3\u53c2\u6570\u914d\u7f6e<\/h3>\n

\/\/ 9600：\u6700\u5e38\u7528，\u517c\u5bb9\u6027\u597d
\n\/\/ 19200：\u5de5\u4e1a\u6807\u51c6
\n\/\/ 115200：\u9ad8\u901f\u4f20\u8f93<\/p>\n

\/\/ \u6807\u51c6\u5de5\u4e1a\u4e32\u53e3\u914d\u7f6e：9600-8-N-1
\nserialPort1 = new SerialPort(
\n portName: "COM3", \/\/ \u4e32\u53e3\u53f7
\n baudRate: 9600, \/\/ \u6ce2\u7279\u7387
\n parity: Parity.None, \/\/ \u6821\u9a8c\u4f4d
\n dataBits: 8, \/\/ \u6570\u636e\u4f4d
\n stopBits: StopBits.One \/\/ \u505c\u6b62\u4f4d
\n)
\n{
\n ReadTimeout = 1000, \/\/ \u8bfb\u8d85\u65f6 1 \u79d2
\n WriteTimeout = 1000 \/\/ \u5199\u8d85\u65f6 1 \u79d2
\n};<\/p>\n

\u7b2c\u4e09\u7ae0：\u5de5\u7a0b\u67b6\u6784\u8bbe\u8ba1<\/h2>\n

3.1 \u5173\u952e\u5b57\u6bb5\u8bf4\u660e<\/p>\n

\/\/ \u4e32\u53e3\u5bf9\u8c61：\u8d1f\u8d23\u7269\u7406\u5c42\u901a\u4fe1
\nprivate SerialPort serialPort1;<\/p>\n

\/\/ Modbus \u4e3b\u7ad9：\u8d1f\u8d23\u534f\u8bae\u5c42\u901a\u4fe1
\nprivate IModbusMaster _master;<\/p>\n

\/\/ \u7ebf\u7a0b\u9501：\u9632\u6b62\u591a\u7ebf\u7a0b\u5e76\u53d1\u8bbf\u95ee\u4e32\u53e3
\nprivate readonly object _lockObj = new object();<\/p>\n

\u7b2c\u56db\u7ae0：\u4ee3\u7801<\/h2>\n

\"\"<\/p>\n<\/p>\n<\/p>\n

using System; \/\/ \u7cfb\u7edf\u57fa\u7840\u547d\u540d\u7a7a\u95f4
\nusing System.Collections.Generic; \/\/ \u6cdb\u578b\u96c6\u5408（List\u7b49）
\nusing System.ComponentModel; \/\/ \u7ec4\u4ef6\u6a21\u578b
\nusing System.Data; \/\/ \u6570\u636e\u76f8\u5173
\nusing System.Drawing; \/\/ \u7ed8\u56fe\/\u989c\u8272\/\u5b57\u4f53
\nusing System.IO.Ports; \/\/ \u4e32\u53e3\u901a\u4fe1 SerialPort
\nusing System.Linq; \/\/ LINQ\u67e5\u8be2
\nusing System.Text; \/\/ \u5b57\u7b26\u4e32\/\u7f16\u7801\u5904\u7406
\nusing System.Threading.Tasks; \/\/ \u5f02\u6b65\u4efb\u52a1 Task
\nusing System.Windows.Forms; \/\/ WinForm\u7a97\u4f53\u63a7\u4ef6
\nusing NModbus; \/\/ NModbus \u6838\u5fc3\u5e93
\nusing NModbus.Device;
\nusing NModbus.Message; \/\/ NModbus \u4e3b\u7ad9\/\u4ece\u7ad9\u8bbe\u5907
\nusing NModbus.Serial; \/\/ NModbus \u4e32\u53e3\u5b9e\u73b0（RTU）<\/p>\n

namespace WindowsFormsApp2 \/\/ \u9879\u76ee\u547d\u540d\u7a7a\u95f4
\n{
\n public partial class Form2 : Form \/\/ Form2 \u7a97\u4f53\u7c7b
\n {
\n private SerialPort serialPort1; \/\/ \u4e32\u53e3\u5bf9\u8c61，\u7528\u4e8e485\/232\u7269\u7406\u901a\u4fe1
\n private IModbusMaster _master; \/\/ Modbus RTU \u4e3b\u7ad9\u5bf9\u8c61，\u8d1f\u8d23\u53d1\u6307\u4ee4
\n private readonly object _lockObj = new object(); \/\/ \u9501\u5bf9\u8c61，\u9632\u6b62\u591a\u7ebf\u7a0b\u5e76\u53d1\u8bfb\u4e32\u53e3<\/p>\n

\/\/ ============================================================
\n \/\/ \u6784\u9020\u51fd\u6570：\u521d\u59cb\u5316\u7a97\u4f53\u3001\u4e32\u53e3\u53c2\u6570\u3001\u6587\u672c\u6846\u6837\u5f0f
\n \/\/ ============================================================
\n public Form2()
\n {
\n InitializeComponent(); \/\/ \u8bbe\u8ba1\u5668\u751f\u6210\u7684\u63a7\u4ef6\u521d\u59cb\u5316（button1\u3001textBox1\u7b49）<\/p>\n

\/\/ ———- \u521d\u59cb\u5316\u4e32\u53e3\u53c2\u6570（COM3, 9600, N, 8, 1）———-
\n serialPort1 = new SerialPort("COM3", 9600, Parity.None, 8, StopBits.One)
\n {
\n ReadTimeout = 1000, \/\/ \u8bfb\u8d85\u65f6 1\u79d2（\u4ece\u7ad9\u6ca1\u54cd\u5e94\u5c31\u629b\u5f02\u5e38，\u907f\u514d\u5361\u6b7b）
\n WriteTimeout = 1000 \/\/ \u5199\u8d85\u65f6 1\u79d2
\n };<\/p>\n

\/\/ ———- \u521d\u59cb\u5316 textBox1 \u4e3a\u591a\u884c\u65e5\u5fd7\u663e\u793a ———-
\n textBox1.Multiline = true; \/\/ \u5141\u8bb8\u591a\u884c
\n textBox1.ScrollBars = ScrollBars.Vertical; \/\/ \u53ea\u663e\u793a\u5782\u76f4\u6eda\u52a8\u6761
\n textBox1.Font = new Font("Consolas", 9f); \/\/ \u7b49\u5bbd\u5b57\u4f53，\u6570\u5b57\u5bf9\u9f50\u597d\u770b
\n textBox1.Size = new Size(337, 300); \/\/ \u6539\u9ad8\u5ea6，\u539f\u8bbe\u8ba1\u5668\u53ea\u670921px\u770b\u4e0d\u5168
\n }<\/p>\n

\/\/ ============================================================
\n \/\/ Log：\u7edf\u4e00\u7684\u65e5\u5fd7\u8f93\u51fa\u65b9\u6cd5
\n \/\/ msg = \u65e5\u5fd7\u5185\u5bb9
\n \/\/ isError = true \u65f6\u7528 [\u9519\u8bef] \u524d\u7f00，\u5426\u5219\u7528 [\u4fe1\u606f]
\n \/\/ \u7279\u70b9：\u81ea\u52a8\u5904\u7406\u8de8\u7ebf\u7a0b\u3001\u81ea\u52a8\u52a0\u65f6\u95f4\u6233\u3001\u81ea\u52a8\u6eda\u5230\u6700\u5e95\u90e8
\n \/\/ ============================================================
\n private void Log(string msg, bool isError = false)
\n {
\n \/\/ \u5982\u679c\u5f53\u524d\u4e0d\u662fUI\u7ebf\u7a0b（\u6bd4\u5982\u4eceTask\u91cc\u8c03\u7528），\u5c31\u5207\u56deUI\u7ebf\u7a0b\u518d\u6267\u884c
\n if (textBox1.InvokeRequired)
\n {
\n textBox1.Invoke(new Action(() => Log(msg, isError)));
\n return;
\n }
\n \/\/ \u524d\u7f00：[\u9519\u8bef] \u6216 [\u4fe1\u606f]
\n string prefix = isError ? "[\u9519\u8bef]" : "[\u4fe1\u606f]";
\n \/\/ \u8ffd\u52a0\u4e00\u884c：\u65f6\u95f4 + \u524d\u7f00 + \u5185\u5bb9 + \u6362\u884c
\n textBox1.AppendText($"{DateTime.Now:HH:mm:ss} {prefix} {msg}{Environment.NewLine}");
\n \/\/ \u5149\u6807\u79fb\u5230\u6700\u540e \u2192 \u81ea\u52a8\u6eda\u52a8\u5230\u5e95\u90e8
\n textBox1.SelectionStart = textBox1.TextLength;
\n textBox1.ScrollToCaret();
\n }<\/p>\n

\/\/ ============================================================
\n \/\/ OpenPort：\u6253\u5f00\u4e32\u53e3\u5e76\u521b\u5efa Modbus \u4e3b\u7ad9
\n \/\/ \u7279\u70b9：\u5df2\u6253\u5f00\u5c31\u76f4\u63a5\u8df3\u8fc7，\u4e0d\u4f1a\u91cd\u590d Open \u629b\u5f02\u5e38
\n \/\/ \u8fd4\u56de\u503c：true=\u6253\u5f00\u6210\u529f，false=\u6253\u5f00\u5931\u8d25
\n \/\/ ============================================================
\n private bool OpenPort()
\n {
\n try
\n {
\n if (!serialPort1.IsOpen)
\n {
\n serialPort1.Open(); \/\/ \u7269\u7406\u6253\u5f00\u4e32\u53e3（\u5360\u7528COM\u53e3）
\n \/\/ \u7528 NModbus \u5de5\u5382\u521b\u5efa RTU \u4e3b\u7ad9，\u7ed1\u5b9a\u5230\u4e32\u53e3
\n _master = new ModbusFactory().CreateRtuMaster(serialPort1);
\n Log($"\u4e32\u53e3 {serialPort1.PortName} \u6253\u5f00\u6210\u529f");
\n }
\n return true;
\n }
\n catch (Exception ex)
\n {
\n Log($"\u4e32\u53e3\u6253\u5f00\u5931\u8d25: {ex.Message}", true); \/\/ COM\u53e3\u4e0d\u5b58\u5728\u6216\u88ab\u5360\u7528\u4f1a\u8d70\u5230\u8fd9\u91cc
\n return false;
\n }
\n }<\/p>\n

\/\/ ============================================================
\n \/\/ ReadCoilsAsync：\u8bfb\u53d6\u7ebf\u5708（Modbus \u529f\u80fd\u7801 0x01）
\n \/\/ slaveId = \u4ece\u7ad9\u5730\u5740（1~247）
\n \/\/ startAddr = \u8d77\u59cb\u5730\u5740（0~65535）
\n \/\/ length = \u8bfb\u53d6\u6570\u91cf（\u5efa\u8bae \u2264125，\u592a\u5927\u5bb9\u6613\u8d85\u65f6）
\n \/\/ \u8fd4\u56de\u503c = \u7ebf\u5708\u72b6\u6001 bool[]，\u5931\u8d25\u8fd4\u56de null
\n \/\/ \u7279\u70b9：\u5f02\u6b65\u4e0d\u5361UI + \u9501\u9632\u5e76\u53d1 + \u5f02\u5e38\u4e0d\u5d29
\n \/\/ ============================================================
\n private async Task<bool[]> ReadCoilsAsync(byte slaveId = 1, ushort startAddr = 0, ushort length = 10)
\n {
\n \/\/ ———- \u7b2c\u4e00\u6b65：\u6253\u5f00\u4e32\u53e3（\u52a0\u9501，\u907f\u514d\u5e76\u53d1\u6253\u5f00）———-
\n lock (_lockObj)
\n {
\n if (!OpenPort()) return null; \/\/ \u6253\u5f00\u5931\u8d25\u76f4\u63a5\u8fd4\u56de
\n }<\/p>\n

try
\n {
\n \/\/ \u8bb0\u5f55\u5f00\u59cb\u65e5\u5fd7
\n Log($"\u8bfb\u7ebf\u5708: \u4ece\u7ad9={slaveId}, \u8d77\u59cb={startAddr}, \u6570\u91cf={length}");<\/p>\n

\/\/ ———- \u7b2c\u4e8c\u6b65：\u8bfb\u53d6\u7ebf\u5708 ———-
\n \/\/ Task.Run：\u628a\u540c\u6b65\u963b\u585e\u7684 ReadCoils \u653e\u5230\u540e\u53f0\u7ebf\u7a0b\u6c60\u6267\u884c，\u4e0d\u5361UI
\n \/\/ \u5185\u5c42\u52a0 lock：\u4fdd\u8bc1\u540c\u4e00\u65f6\u523b\u4e32\u53e3\u53ea\u53d1\u4e00\u6761\u6307\u4ee4（\u5426\u5219485\u603b\u7ebf\u4f1a\u4e71）
\n bool[] coils = await Task.Run(() =>
\n {
\n lock (_lockObj)
\n {
\n \/\/ return _master.ReadCoils(slaveId, startAddr, length);<\/p>\n

return _master.ReadInputs(slaveId, startAddr, length);<\/p>\n

}
\n });<\/p>\n

\/\/ ———- \u7b2c\u4e09\u6b65：\u683c\u5f0f\u5316\u8f93\u51fa\u7ed3\u679c ———-
\n StringBuilder sb = new StringBuilder("\u7ed3\u679c: ");
\n for (int i = 0; i < coils.Length; i++)
\n {
\n \/\/ \u683c\u5f0f\u793a\u4f8b：[0]=True [1]=False …
\n sb.Append($"[{startAddr + i}]={coils[i]} ");
\n }
\n Log(sb.ToString());
\n return coils; \/\/ \u8fd4\u56de\u7ed3\u679c\u6570\u7ec4，\u65b9\u4fbf\u5916\u90e8\u4e1a\u52a1\u903b\u8f91\u4f7f\u7528
\n }
\n catch (Exception ex)
\n {
\n \/\/ \u8d85\u65f6\u3001CRC\u9519\u8bef\u3001\u4ece\u7ad9\u65e0\u54cd\u5e94\u7b49\u5f02\u5e38\u90fd\u4f1a\u8d70\u5230\u8fd9\u91cc
\n Log($"\u8bfb\u7ebf\u5708\u5931\u8d25: {ex.Message}", true);
\n return null;
\n }<\/p>\n

}<\/p>\n

private async Task<ushort[]> ReadRegistersAsync(byte slaveId = 1, ushort startAddr = 0, ushort length = 10)
\n {
\n \/\/ ———- \u7b2c\u4e00\u6b65：\u6253\u5f00\u4e32\u53e3（\u52a0\u9501，\u907f\u514d\u5e76\u53d1\u6253\u5f00）———-
\n lock (_lockObj)
\n {
\n if (!OpenPort()) return null; \/\/ \u6253\u5f00\u5931\u8d25\u76f4\u63a5\u8fd4\u56de
\n }<\/p>\n

try
\n {
\n \/\/ \u8bb0\u5f55\u5f00\u59cb\u65e5\u5fd7
\n Log($"\u8bfb\u7ebf\u5708: \u4ece\u7ad9={slaveId}, \u8d77\u59cb={startAddr}, \u6570\u91cf={length}");<\/p>\n

\/\/ ———- \u7b2c\u4e8c\u6b65：\u8bfb\u53d6\u7ebf\u5708 ———-
\n \/\/ Task.Run：\u628a\u540c\u6b65\u963b\u585e\u7684 ReadCoils \u653e\u5230\u540e\u53f0\u7ebf\u7a0b\u6c60\u6267\u884c，\u4e0d\u5361UI<\/p>\n

\/\/ \u5185\u5c42\u52a0 lock：\u4fdd\u8bc1\u540c\u4e00\u65f6\u523b\u4e32\u53e3\u53ea\u53d1\u4e00\u6761\u6307\u4ee4（\u5426\u5219485\u603b\u7ebf\u4f1a\u4e71）
\n ushort[] coils = await Task.Run(() =>
\n {
\n lock (_lockObj)
\n {<\/p>\n

return _master.ReadHoldingRegisters(slaveId, startAddr, length);
\n \/\/ return _master.ReadInputRegisters(slaveId, startAddr, length);<\/p>\n

}
\n });<\/p>\n

\/\/ ———- \u7b2c\u4e09\u6b65：\u683c\u5f0f\u5316\u8f93\u51fa\u7ed3\u679c ———-
\n StringBuilder sb = new StringBuilder("\u7ed3\u679c: ");
\n for (int i = 0; i < coils.Length; i++)
\n {
\n \/\/ \u683c\u5f0f\u793a\u4f8b：[0]=True [1]=False …
\n sb.Append($"[{startAddr + i}]={coils[i]} ");
\n if ( i==1 ){
\n label1.Text=coils[i].ToString();<\/p>\n

if (coils[i] == 22)
\n {
\n \/\/ \u5199\u5165\u5bc4\u5b58\u5668\u793a\u4f8b：\u5411\u5730\u5740 2 \u5199\u5165\u503c 99（\u6709\u6548\u8303\u56f4 0-9）
\n Log("\u68c0\u6d4b\u5230\u5bc4\u5b58\u5668[1]\u503c\u4e3a22，\u51c6\u5907\u5199\u5165\u5bc4\u5b58\u5668…");
\n \/\/ \u4f7f\u7528 Task.Run \u5728\u540e\u53f0\u7ebf\u7a0b\u6267\u884c\u5199\u64cd\u4f5c，\u907f\u514d\u963b\u585e UI
\n Task.Run(async () =>
\n {
\n \/\/ \u5199\u5355\u4e2a\u5bc4\u5b58\u5668：\u5411\u5730\u5740 2 \u5199\u5165\u503c 99
\n \/\/ await WriteRegisterAsync(slaveId: 1, addr: 2, value: 99);
\n \/\/ \u5199\u591a\u4e2a\u5bc4\u5b58\u5668：\u5411\u5730\u5740 2 \u5f00\u59cb\u5199\u5165 3 \u4e2a\u503c
\n await WriteRegistersAsync(slaveId: 1, startAddr: 2, values: new ushort[] { 99, 98, 97 });
\n });
\n }
\n }<\/p>\n

}
\n Log(sb.ToString());
\n return coils; \/\/ \u8fd4\u56de\u7ed3\u679c\u6570\u7ec4，\u65b9\u4fbf\u5916\u90e8\u4e1a\u52a1\u903b\u8f91\u4f7f\u7528
\n }
\n catch (Exception ex)
\n {
\n \/\/ \u8d85\u65f6\u3001CRC\u9519\u8bef\u3001\u4ece\u7ad9\u65e0\u54cd\u5e94\u7b49\u5f02\u5e38\u90fd\u4f1a\u8d70\u5230\u8fd9\u91cc
\n Log($"\u8bfb\u7ebf\u5708\u5931\u8d25: {ex.Message}", true);
\n return null;
\n }
\n }
\n \/\/ ============================================================
\n \/\/ WriteRegisterAsync：\u5199\u5355\u4e2a\u4fdd\u6301\u5bc4\u5b58\u5668（Modbus \u529f\u80fd\u7801 0x06）
\n \/\/ slaveId = \u4ece\u7ad9\u5730\u5740（1~247）
\n \/\/ addr = \u5bc4\u5b58\u5668\u5730\u5740（0~65535）
\n \/\/ value = \u8981\u5199\u5165\u7684\u503c（ushort，0~65535）
\n \/\/ \u8fd4\u56de\u503c = true=\u5199\u5165\u6210\u529f，false=\u5199\u5165\u5931\u8d25
\n \/\/ \u7279\u70b9：\u5f02\u6b65\u4e0d\u5361UI + \u9501\u9632\u5e76\u53d1 + \u5f02\u5e38\u4e0d\u5d29
\n \/\/ ============================================================
\n private async Task<bool> WriteRegisterAsync(byte slaveId = 1, ushort addr = 0, ushort value = 0)
\n {
\n \/\/ ———- \u7b2c\u4e00\u6b65：\u6253\u5f00\u4e32\u53e3（\u52a0\u9501，\u907f\u514d\u5e76\u53d1\u6253\u5f00）———-
\n lock (_lockObj)
\n {
\n if (!OpenPort()) return false; \/\/ \u6253\u5f00\u5931\u8d25\u76f4\u63a5\u8fd4\u56de
\n }<\/p>\n

try
\n {
\n \/\/ \u8bb0\u5f55\u5f00\u59cb\u65e5\u5fd7
\n Log($"\u5199\u5355\u4e2a\u5bc4\u5b58\u5668: \u4ece\u7ad9={slaveId}, \u5730\u5740={addr}, \u503c={value}");<\/p>\n

\/\/ ———- \u7b2c\u4e8c\u6b65：\u5199\u5355\u4e2a\u5bc4\u5b58\u5668 ———-
\n \/\/ Task.Run：\u628a\u540c\u6b65\u963b\u585e\u7684 WriteSingleRegister \u653e\u5230\u540e\u53f0\u7ebf\u7a0b\u6c60\u6267\u884c，\u4e0d\u5361UI
\n \/\/ \u5185\u5c42\u52a0 lock：\u4fdd\u8bc1\u540c\u4e00\u65f6\u523b\u4e32\u53e3\u53ea\u53d1\u4e00\u6761\u6307\u4ee4（\u5426\u5219485\u603b\u7ebf\u4f1a\u4e71）
\n await Task.Run(() =>
\n {
\n lock (_lockObj)
\n {
\n _master.WriteSingleRegister(slaveId, addr, value);
\n }
\n });<\/p>\n

Log($"\u5199\u5bc4\u5b58\u5668\u6210\u529f: [{addr}]={value}");
\n return true;
\n }
\n catch (Exception ex)
\n {
\n \/\/ \u8d85\u65f6\u3001CRC\u9519\u8bef\u3001\u4ece\u7ad9\u65e0\u54cd\u5e94\u7b49\u5f02\u5e38\u90fd\u4f1a\u8d70\u5230\u8fd9\u91cc
\n Log($"\u5199\u5bc4\u5b58\u5668\u5931\u8d25: {ex.Message}", true);
\n return false;
\n }
\n }<\/p>\n

\/\/ ============================================================
\n \/\/ WriteRegistersAsync：\u5199\u591a\u4e2a\u4fdd\u6301\u5bc4\u5b58\u5668（Modbus \u529f\u80fd\u7801 0x10）
\n \/\/ slaveId = \u4ece\u7ad9\u5730\u5740（1~247）
\n \/\/ startAddr = \u8d77\u59cb\u5730\u5740（0~65535）
\n \/\/ values = \u8981\u5199\u5165\u7684\u503c\u6570\u7ec4（\u5efa\u8bae \u2264125，\u592a\u5927\u5bb9\u6613\u8d85\u65f6）
\n \/\/ \u8fd4\u56de\u503c = true=\u5199\u5165\u6210\u529f，false=\u5199\u5165\u5931\u8d25
\n \/\/ \u7279\u70b9：\u5f02\u6b65\u4e0d\u5361UI + \u9501\u9632\u5e76\u53d1 + \u5f02\u5e38\u4e0d\u5d29
\n \/\/ ============================================================
\n private async Task<bool> WriteRegistersAsync(byte slaveId = 1, ushort startAddr = 0, ushort[] values = null)
\n {
\n \/\/ \u53c2\u6570\u68c0\u67e5：values \u4e3a\u7a7a\u6216\u957f\u5ea6\u4e3a 0 \u76f4\u63a5\u8fd4\u56de
\n if (values == null || values.Length == 0)
\n {
\n Log("\u5199\u591a\u4e2a\u5bc4\u5b58\u5668\u5931\u8d25: \u5199\u5165\u6570\u636e\u4e3a\u7a7a", true);
\n return false;
\n }<\/p>\n

\/\/ ———- \u7b2c\u4e00\u6b65：\u6253\u5f00\u4e32\u53e3（\u52a0\u9501，\u907f\u514d\u5e76\u53d1\u6253\u5f00）———-
\n lock (_lockObj)
\n {
\n if (!OpenPort()) return false; \/\/ \u6253\u5f00\u5931\u8d25\u76f4\u63a5\u8fd4\u56de
\n }<\/p>\n

try
\n {
\n \/\/ \u8bb0\u5f55\u5f00\u59cb\u65e5\u5fd7
\n Log($"\u5199\u591a\u4e2a\u5bc4\u5b58\u5668: \u4ece\u7ad9={slaveId}, \u8d77\u59cb={startAddr}, \u6570\u91cf={values.Length}");<\/p>\n

\/\/ ———- \u7b2c\u4e8c\u6b65：\u5199\u591a\u4e2a\u5bc4\u5b58\u5668 ———-
\n \/\/ Task.Run：\u628a\u540c\u6b65\u963b\u585e\u7684 WriteMultipleRegisters \u653e\u5230\u540e\u53f0\u7ebf\u7a0b\u6c60\u6267\u884c，\u4e0d\u5361UI
\n \/\/ \u5185\u5c42\u52a0 lock：\u4fdd\u8bc1\u540c\u4e00\u65f6\u523b\u4e32\u53e3\u53ea\u53d1\u4e00\u6761\u6307\u4ee4（\u5426\u5219485\u603b\u7ebf\u4f1a\u4e71）
\n await Task.Run(() =>
\n {
\n lock (_lockObj)
\n {
\n _master.WriteMultipleRegisters(slaveId, startAddr, values);
\n }
\n });<\/p>\n

\/\/ ———- \u7b2c\u4e09\u6b65：\u683c\u5f0f\u5316\u8f93\u51fa\u7ed3\u679c ———-
\n StringBuilder sb = new StringBuilder("\u5199\u5165\u6210\u529f: ");
\n for (int i = 0; i < values.Length; i++)
\n {
\n sb.Append($"[{startAddr + i}]={values[i]} ");
\n }
\n Log(sb.ToString());
\n return true;
\n }
\n catch (Exception ex)
\n {
\n \/\/ \u8d85\u65f6\u3001CRC\u9519\u8bef\u3001\u4ece\u7ad9\u65e0\u54cd\u5e94\u7b49\u5f02\u5e38\u90fd\u4f1a\u8d70\u5230\u8fd9\u91cc
\n Log($"\u5199\u591a\u4e2a\u5bc4\u5b58\u5668\u5931\u8d25: {ex.Message}", true);
\n return false;
\n }
\n }<\/p>\n

\/\/ ============================================================
\n \/\/ button1 \u70b9\u51fb\u4e8b\u4ef6：\u89e6\u53d1\u8bfb\u7ebf\u5708
\n \/\/ ============================================================
\n private async void button1_Click(object sender, EventArgs e)
\n {
\n button1.Enabled = false; \/\/ \u6309\u94ae\u7f6e\u7070，\u9632\u6b62\u7528\u6237\u5feb\u901f\u8fde\u70b9\u89e6\u53d1\u591a\u6b21
\n try
\n {
\n \/\/ \u4ece\u7ad91，\u5730\u57400\u5f00\u59cb，\u8bfb10\u4e2a\u7ebf\u5708
\n \/\/ await ReadCoilsAsync(slaveId: 1, startAddr: 0, length: 10);
\n await ReadRegistersAsync(slaveId: 1, startAddr: 0, length: 10);<\/p>\n

}
\n finally
\n {
\n button1.Enabled = true; \/\/ \u65e0\u8bba\u6210\u529f\u5931\u8d25，\u6700\u540e\u90fd\u6062\u590d\u6309\u94ae\u53ef\u70b9\u51fb
\n }
\n }<\/p>\n

\/\/ ============================================================
\n \/\/ \u7a97\u4f53\u52a0\u8f7d\u4e8b\u4ef6
\n \/\/ ============================================================
\n private void Form2_Load(object sender, EventArgs e)
\n {
\n Log("\u521d\u59cb\u5316\u5b8c\u6210");
\n }<\/p>\n

\/\/ ============================================================
\n \/\/ \u7a97\u4f53\u5173\u95ed\u4e8b\u4ef6：\u91ca\u653e\u4e32\u53e3\u8d44\u6e90
\n \/\/ \u5fc5\u987b\u91ca\u653e！\u5426\u5219\u4e0b\u6b21\u6253\u5f00\u4f1a\u62a5"COM\u53e3\u5df2\u88ab\u5360\u7528"
\n \/\/ ============================================================
\n protected override void OnFormClosing(FormClosingEventArgs e)
\n {
\n try
\n {
\n _master?.Dispose(); \/\/ \u91ca\u653e Modbus \u4e3b\u7ad9
\n if (serialPort1 != null && serialPort1.IsOpen)
\n serialPort1.Close(); \/\/ \u5173\u95ed\u4e32\u53e3
\n }
\n catch { } \/\/ \u5173\u95ed\u65f6\u5f02\u5e38\u76f4\u63a5\u5ffd\u7565，\u4e0d\u5f71\u54cd\u7a97\u4f53\u5173\u95ed
\n base.OnFormClosing(e);
\n }
\n }
\n}<\/p>\n

\u7b2c\u4e94\u7ae0：\u5de5\u7a0b\u5316\u4eae\u70b9\u6df1\u5ea6\u89e3\u6790<\/h2>\n

5.1 \u5f02\u6b65\u7f16\u7a0b：async\/await<\/h3>\n

\/\/ \u274c \u4f20\u7edf\u540c\u6b65\u65b9\u5f0f：\u963b\u585e UI \u7ebf\u7a0b
\nprivate void SyncMethod()
\n{
\n \/\/ \u8fd9\u91cc\u4f1a\u963b\u585e\u754c\u9762 ~1 \u79d2
\n var data = _master.ReadRegisters(1, 0, 10);
\n textBox1.Text = $"\u8bfb\u53d6\u5b8c\u6210"; \/\/ \u8981\u7b49\u4e0a\u9762\u5b8c\u6210\u624d\u6267\u884c
\n}<\/p>\n

\/\/ \u2705 \u5f02\u6b65\u65b9\u5f0f：\u4e0d\u963b\u585e UI
\nprivate async Task AsyncMethod()
\n{
\n \/\/ \u8fd9\u91cc\u4e0d\u4f1a\u963b\u585e\u754c\u9762
\n var data = await ReadRegistersAsync(1, 0, 10);
\n textBox1.Text = $"\u8bfb\u53d6\u5b8c\u6210"; \/\/ \u8bfb\u53d6\u5b8c\u6210\u540e\u81ea\u52a8\u6267\u884c
\n}<\/p>\n

async\/await \u539f\u7406：<\/p>\n

UI \u7ebf\u7a0b: [\u7b49\u5f85 async \u5b8c\u6210] \u2190\u2192 [\u7ee7\u7eed\u6267\u884c\u5176\u4ed6 UI \u64cd\u4f5c]
\n \u2198
\n\u540e\u53f0\u7ebf\u7a0b: [Task.Run \u6267\u884c Modbus \u64cd\u4f5c]
\n \u2197
\nUI \u7ebf\u7a0b: [await \u8fd4\u56de\u7ed3\u679c] \u2190 [\u6062\u590d\u6267\u884c\u540e\u7eed\u4ee3\u7801]<\/p>\n

5.2 Task.Run \u7ebf\u7a0b\u6c60<\/h3>\n

\/\/ Task.Run \u5c06\u5de5\u4f5c\u653e\u5230\u7ebf\u7a0b\u6c60\u6267\u884c
\nawait Task.Run(() =>
\n{
\n \/\/ \u8fd9\u91cc\u7684\u4ee3\u7801\u5728\u7ebf\u7a0b\u6c60\u6267\u884c，\u4e0d\u5360\u7528 UI \u7ebf\u7a0b
\n bool result = _master.WriteSingleRegister(1, 0, 100);
\n return result;
\n});
\n\/\/ await \u5b8c\u6210\u540e\u56de\u5230 UI \u7ebf\u7a0b<\/p>\n

\u4e3a\u4ec0\u4e48\u8981\u7528 Task.Run？
\n– `_master.WriteSingleRegister()` \u662f\u540c\u6b65\u963b\u585e\u65b9\u6cd5
\n– \u76f4\u63a5\u8c03\u7528\u4f1a\u5361\u4f4f UI \u7ebf\u7a0b
\n– Task.Run \u5c06\u5176\u653e\u5230\u540e\u53f0\u7ebf\u7a0b\u6267\u884c<\/p>\n

5.3 lock \u9501：485 \u603b\u7ebf\u5e76\u53d1\u4fdd\u62a4<\/h3>\n

private readonly object _lockObj = new object();<\/p>\n

\/\/ \u4e24\u4e2a\u5730\u65b9\u90fd\u8981\u52a0\u9501：\u6253\u5f00\u4e32\u53e3\u548c Modbus \u64cd\u4f5c
\nlock (_lockObj)
\n{
\n if (!OpenPort()) return false; \/\/ \u7b2c\u4e00\u6b65：\u6253\u5f00\u4e32\u53e3
\n}<\/p>\n

\/\/ \u7b2c\u4e8c\u6b65：\u5f02\u6b65\u6267\u884c Modbus \u64cd\u4f5c
\nawait Task.Run(() =>
\n{
\n lock (_lockObj) \/\/ \u5185\u5c42\u5fc5\u987b\u518d\u52a0\u9501！
\n {
\n _master.WriteSingleRegister(slaveId, addr, value);
\n }
\n});<\/p>\n

\u4e3a\u4ec0\u4e48\u9700\u8981\u53cc\u5c42\u9501？
\n\u65f6\u95f4\u7ebf:
\n T1: \u7ebf\u7a0bA lock(_lockObj) \u2192 OpenPort() [\u5360\u7528\u9501]
\n T2: \u7ebf\u7a0bB lock(_lockObj) \u2192 \u7b49\u5f85… [\u7b49\u5f85\u9501\u91ca\u653e]
\n T3: \u7ebf\u7a0bA OpenPort() \u5b8c\u6210 \u2192 \u91ca\u653e\u9501
\n T4: \u7ebf\u7a0bB \u83b7\u5f97\u9501 \u2192 OpenPort() [\u5b89\u5168\u6267\u884c]
\n T5: \u7ebf\u7a0bA lock(_lockObj) \u2192 Write… [\u5360\u7528\u9501]
\n T6: \u7ebf\u7a0bB lock(_lockObj) \u2192 \u7b49\u5f85… [\u7b49\u5f85\u9501\u91ca\u653e]<\/p>\n

RS-485 \u603b\u7ebf\u89c4\u5219：
\n– RS-485 \u662f\u534a\u53cc\u5de5\u603b\u7ebf
\n– \u540c\u4e00\u65f6\u523b\u53ea\u80fd\u6709\u4e00\u4e2a\u8bbe\u5907\u53d1\u9001
\n– \u5982\u679c\u591a\u4e2a\u6307\u4ee4\u540c\u65f6\u53d1\u9001，\u4f1a\u5bfc\u81f4\u6570\u636e\u51b2\u7a81<\/p>\n

5.4 Invoke \u673a\u5236：\u8de8\u7ebf\u7a0b UI \u64cd\u4f5c<\/h3>\n

private void Log(string msg, bool isError = false)
\n{
\n \/\/ \u68c0\u67e5\u662f\u5426\u8de8\u7ebf\u7a0b
\n if (textBox1.InvokeRequired)
\n {
\n \/\/ \u8de8\u7ebf\u7a0b：\u4f7f\u7528 Invoke \u5207\u6362\u5230 UI \u7ebf\u7a0b
\n \/\/ Invoke \u662f\u540c\u6b65\u65b9\u6cd5，\u4f1a\u963b\u585e\u5f53\u524d\u7ebf\u7a0b\u76f4\u5230 UI \u7ebf\u7a0b\u6267\u884c\u5b8c\u6210
\n textBox1.Invoke(new Action(() => Log(msg, isError)));
\n return;
\n }<\/p>\n

\/\/ UI \u7ebf\u7a0b：\u76f4\u63a5\u64cd\u4f5c\u63a7\u4ef6
\n textBox1.AppendText(msg);
\n}<\/p>\n

\u4e3a\u4ec0\u4e48\u9700\u8981 Invoke？
\n– WinForm \u63a7\u4ef6\u53ea\u80fd\u5728 UI \u7ebf\u7a0b\u64cd\u4f5c
\n– Task.Run \u4e2d\u7684\u4ee3\u7801\u5728\u7ebf\u7a0b\u6c60\u6267\u884c
\n– \u76f4\u63a5\u64cd\u4f5c\u63a7\u4ef6\u4f1a\u629b\u5f02\u5e38：`Cross-thread operation not valid`
\nInvoke vs BeginInvoke：
\n– `Invoke`：\u540c\u6b65，\u7b49\u5f85 UI \u7ebf\u7a0b\u5b8c\u6210
\n– `BeginInvoke`：\u5f02\u6b65，\u7acb\u5373\u8fd4\u56de<\/p>\n","protected":false},"excerpt":{"rendered":"

\u672c\u6587\u5c06\u5e26\u4f60\u4ece\u96f6\u5f00\u59cb，\u4f7f\u7528 C# \u548c NModbus \u5e93\u5b9e\u73b0\u4e00\u4e2a\u5b8c\u6574\u7684 Modbus RTU \u5de5\u4e1a\u901a\u4fe1\u7cfb\u7edf\u3002\u7b2c\u4e00\u7ae0：\u9879\u76ee\u80cc\u666f\u4e0e\u9700\u6c42\u5206\u67901.1 \u4e3a\u4ec0\u4e48\u9009\u62e9 Modbus？Modbus \u662f\u5de5\u4e1a\u9886\u57df\u5e94\u7528\u6700\u5e7f\u6cdb\u7684\u901a\u4fe1\u534f\u8bae\u4e4b\u4e00，\u7531 Modicon（\u73b0 Schneider Electric）\u4e8e 1979 \u5e74\u63a8\u51fa\u3002**\u6838\u5fc3\u4f18\u52bf：**
\n– 🔓 **\u5b8c\u5168\u5f00\u653e**：\u514d\u8d39\u4f7f<\/p>\n","protected":false},"author":2,"featured_media":91547,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[55,190],"topic":[],"class_list":["post-91548","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-server","tag-c","tag-190"],"yoast_head":"\nC# \u5b9e\u6218\u3011\u7528 NModbus \u5feb\u901f\u642d\u5efa Modbus RTU \u5de5\u4e1a\u901a\u4fe1\u7cfb\u7edf\uff08\u542b\u5b8c\u6574\u6e90\u7801\uff09 - \u7f51\u7855\u4e92\u8054\u5e2e\u52a9\u4e2d\u5fc3<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.wsisp.com\/helps\/91548.html\" \/>\n<meta property=\"og:locale\" content=\"zh_CN\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"C# \u5b9e\u6218\u3011\u7528 NModbus \u5feb\u901f\u642d\u5efa Modbus RTU \u5de5\u4e1a\u901a\u4fe1\u7cfb\u7edf\uff08\u542b\u5b8c\u6574\u6e90\u7801\uff09 - 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