实例介绍
【实例简介】
【实例截图】
【核心代码】
using System;
using System.Windows.Forms;
using NModbus;
using System.Net.Sockets;
namespace modbus
{
public partial class Form1 : Form
{
private static ModbusFactory modbusFactory;
private static IModbusMaster master;
//写线圈或写寄存器数组
bool[] coilsBuffer;
ushort[] registerBuffer;
//功能码
string functionCode;
//参数(分别为站号,起始地址,长度)
byte slaveAddress;
ushort startAddress;
ushort numberOfPoints;
public Form1()
{
InitializeComponent();
}
private void Form1_Load(object sender, EventArgs e)
{
//初始化modbusmaster
modbusFactory = new ModbusFactory();
//在本地测试 所以使用回环地址,modbus协议规定端口号 502
master = modbusFactory.CreateMaster(new TcpClient(txt_ip.Text, int.Parse(txt_port.Text)));
//设置读取超时时间
master.Transport.ReadTimeout = 2000;
master.Transport.Retries = 2000;
groupBox1.Enabled = false;
groupBox2.Enabled = false;
}
private async void ExecuteFunction()
{
try
{
//重新实例化是为了 modbus slave更换连接时不报错
master = modbusFactory.CreateMaster(new TcpClient(txt_ip.Text, int.Parse(txt_port.Text)));
if (functionCode != null)
{
switch (functionCode)
{
case "01 Read Coils"://读取单个线圈
SetReadParameters();
coilsBuffer = master.ReadCoils(slaveAddress, startAddress, numberOfPoints);
for (int i = 0; i < coilsBuffer.Length; i )
{
SetMsg(coilsBuffer[i] "");
}
break;
case "02 Read DisCrete Inputs"://读取输入线圈/离散量线圈
SetReadParameters();
coilsBuffer = master.ReadInputs(slaveAddress, startAddress, numberOfPoints);
for (int i = 0; i < coilsBuffer.Length; i )
{
SetMsg(coilsBuffer[i] "");
}
break;
case "03 Read Holding Registers"://读取保持寄存器
SetReadParameters();
registerBuffer = master.ReadHoldingRegisters(slaveAddress, startAddress, numberOfPoints);
for (int i = 0; i < registerBuffer.Length; i )
{
SetMsg(registerBuffer[i] "");
}
break;
case "04 Read Input Registers"://读取输入寄存器
SetReadParameters();
registerBuffer = master.ReadInputRegisters(slaveAddress, startAddress, numberOfPoints);
for (int i = 0; i < registerBuffer.Length; i )
{
SetMsg(registerBuffer[i] "");
}
break;
case "05 Write Single Coil"://写单个线圈
SetWriteParametes();
await master.WriteSingleCoilAsync(slaveAddress, startAddress, coilsBuffer[0]);
break;
case "06 Write Single Registers"://写单个输入线圈/离散量线圈
SetWriteParametes();
await master.WriteSingleRegisterAsync(slaveAddress, startAddress, registerBuffer[0]);
break;
case "0F Write Multiple Coils"://写一组线圈
SetWriteParametes();
await master.WriteMultipleCoilsAsync(slaveAddress, startAddress, coilsBuffer);
break;
case "10 Write Multiple Registers"://写一组保持寄存器
SetWriteParametes();
await master.WriteMultipleRegistersAsync(slaveAddress, startAddress, registerBuffer);
break;
default:
break;
}
}
else
{
MessageBox.Show("请选择功能码!");
}
master.Dispose();
}
catch (Exception ex)
{
MessageBox.Show(ex.Message);
}
}
/// <summary>
/// 初始化读参数
/// </summary>
private void SetReadParameters()
{
if (txt_startAddr1.Text == "" || txt_slave1.Text == "" || txt_length.Text == "")
{
MessageBox.Show("请填写读参数!");
}
else
{
slaveAddress = byte.Parse(txt_slave1.Text);
startAddress = ushort.Parse(txt_startAddr1.Text);
numberOfPoints = ushort.Parse(txt_length.Text);
}
}
/// <summary>
/// 初始化写参数
/// </summary>
private void SetWriteParametes()
{
if (txt_startAddr2.Text == "" || txt_slave2.Text == "" || txt_data.Text == "")
{
MessageBox.Show("请填写写参数!");
}
else
{
slaveAddress = byte.Parse(txt_slave2.Text);
startAddress = ushort.Parse(txt_startAddr2.Text);
//判断是否写线圈
if (comboBox1.SelectedIndex == 4 || comboBox1.SelectedIndex == 6)
{
string[] strarr = txt_data.Text.Split(' ');
coilsBuffer = new bool[strarr.Length];
//转化为bool数组
for (int i = 0; i < strarr.Length; i )
{
// strarr[i] == "0" ? coilsBuffer[i] = true : coilsBuffer[i] = false;
if (strarr[i] == "0")
{
coilsBuffer[i] = false;
}
else
{
coilsBuffer[i] = true;
}
}
}
else
{
//转化ushort数组
string[] strarr = txt_data.Text.Split(' ');
registerBuffer = new ushort[strarr.Length];
for (int i = 0; i < strarr.Length; i )
{
registerBuffer[i] = ushort.Parse(strarr[i]);
}
}
}
}
/// <summary>
/// SetMessage
/// </summary>
/// <param name="msg"></param>
public void SetMsg(string msg)
{
richTextBox1.Invoke(new Action(() => { richTextBox1.AppendText(msg "\r\n"); }));
}
private void button2_Click(object sender, EventArgs e)
{
ExecuteFunction();
}
private void button1_Click(object sender, EventArgs e)
{
richTextBox1.Clear();
}
private void comboBox1_SelectedIndexChanged(object sender, EventArgs e)
{
if (comboBox1.SelectedIndex >= 4)
{
groupBox2.Enabled = true;
groupBox1.Enabled = false;
}
else
{
groupBox1.Enabled = true;
groupBox2.Enabled = false;
}
comboBox1.Invoke(new Action(() => { functionCode = comboBox1.SelectedItem.ToString(); }));
}
}
}
标签： Modbus Tcp Modbus master tcp OD
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