C#使用nmodbus新建客户端详细代码
时间: 2024-09-06 07:03:43 浏览: 74
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在C#中,使用NModbus库创建Modbus TCP/IP客户端的基本步骤包括添加依赖、创建连接、发送请求和处理响应。下面是一个简化的示例代码:
首先,你需要安装NModbus.Net库,如果你还没有,可以使用NuGet包管理器添加:
```powershell
Install-Package NModbus.Net
```
然后,在项目中引用`NModbus4.dll`。
接下来,这是创建客户端的简单代码:
```csharp
using NModbus;
using NModbus.IO;
class ModbusTcpClientExample
{
private TcpMasterSocket _socket;
public void ConnectToServer(string ipAddress, int port)
{
try
{
_socket = new TcpMasterSocket();
_socket.Connect(ipAddress, port);
Console.WriteLine($"Connected to {ipAddress}:{port}");
}
catch (Exception ex)
{
Console.WriteLine("Failed to connect: " + ex.Message);
}
}
public byte[] ReadHoldingRegisters(int_slaveId, uint startRegister, uint numberOfRegisters)
{
using (var master = Master.newForSocket(_socket))
{
RequestMessage request = new FunctionCode.ReadHoldingRegistersRequest(numberOfRegisters, startRegister, slaveId);
ResponseMessage response = master.Request(request);
if (!response.IsError)
{
return response.GetRegisters().ToByteArray();
}
else
{
Console.WriteLine($"Error reading registers: {response(errno => response.ErrorCode(errno))}");
}
}
return null; // Return an empty array or handle error more specifically.
}
public void Disconnect()
{
_socket?.Close();
}
static void Main(string[] args)
{
ModbusTcpClientExample client = new ModbusTcpClientExample();
client.ConnectToServer("192.168.1.100", 502); // Replace with your server IP and port
// Example usage:
byte[] registers = client.ReadHoldingRegisters(1, 0, 10); // Read first 10 holding registers from slave ID 1
if(registers != null)
{
Console.WriteLine(BitConverter.ToString(registers));
// Process the register data here
}
client.Disconnect();
}
}
```
在这个例子中,我们创建了一个`TcpMasterSocket`实例并连接到服务器。然后,我们调用`ReadHoldingRegisters`函数来读取寄存器,并处理返回的结果。记得替换实际的IP地址和端口。
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