在C＃中读取Modbus串行端口数据 [英] Modbus Serial Port Data Reading in C#
本文介绍了在C＃中读取Modbus串行端口数据的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！
问题描述
您好，我正在尝试读取串行端口数据。我使用NModbus库进行modbus通信。代码适用于读写目的。但有时我有一些未知的错误，我想看看串行端口的活动。我尝试使用 SerialDataReceivedEventHandler ，但我没有从端口获取任何东西，但仍然可以读取保持寄存器的值。这是我的代码。我希望通过串口发送/接收数据包。
namespace ModbusMaster
{
public partial class Form1：Form
{
public Form1（）
{
InitializeComponent（）;
this.Load + = Form1_Load;
$ b void Form1_Load（object sender，EventArgs e）
{
int [] baud = new int [] {4800 ，9600,19200,38400,57600,115200};
int [] databit = new int [] {7，8};
int [] stpBits = new int [] {1，2};
string [] party = new string [] {None，Odd，Even};
string [] Mode =新字符串[] {ASCII，RTU};
ModbusMode.DataSource =模式;
Baud_Rate.DataSource =波特;
Data.DataSource = databit;
Stop.DataSource = stpBits;
Pari.DataSource =派对;
GetPortList（）;
private void button1_Click（object sender，EventArgs e）
{
string ProtocolMode = ModbusMode.GetItemText（ModbusMode.SelectedItem）;
string portName = listBox1.GetItemText（listBox1.SelectedItem）;
if（listBox1.SelectedIndex == -1）
{
MessageBox.Show（请选择串口!!!）;
}
else
{
using（SerialPort port = new SerialPort（portName））
{
if（port！= null& amp; ;& port.IsOpen）
{
port.Close（）;
}
//配置串口
port.BaudRate = int.Parse（Baud_Rate.Text）;
port.DataBits = int.Parse（Data.Text）;
port.Parity =（Parity）Enum.Parse（typeof（Parity），Pari.Text）;
port.StopBits =（StopBits）Enum.Parse（typeof（StopBits），Stop.Text）;
port.DataReceived + = new SerialDataReceivedEventHandler（port_DataReceived）;
port.Open（）;
//创建modbus master
if（ProtocolMode ==RTU）
{
IModbusSerialMaster master = ModbusSerialMaster.CreateRtu（port）;
int temp = ushort.Parse（StrtAdd.Text） - 1;
字节slaveId = byte.Parse（Slave.Text）;
ushort startAddress =（ushort）（temp）;
ushort points = ushort.Parse（regis.Text）;
ushort [] holding_register = new ushort [] {};
holding_register = master.ReadHoldingRegisters（slaveId，startAddress，points）;
string tempString =;
foreach（hold_register中的ushort值）
{
tempString + = value +;
}
val.Text = tempString;
// val.Text = Convert.ToString（hold_register [0] ++ holding_register [1]）;
if（ProtocolMode ==ASCII）
{
IModbusSerialMaster master = ModbusSerialMaster.CreateAscii（port）;
int temp = ushort.Parse（StrtAdd.Text） - 1;
字节slaveId = byte.Parse（Slave.Text）;
ushort startAddress =（ushort）（temp）;
ushort points = ushort.Parse（regis.Text）;
ushort [] holding_register = new ushort [] {};
holding_register = master.ReadHoldingRegisters（slaveId，startAddress，points）;
string tempString =;
foreach（hold_register中的ushort值）
{
tempString + = value +;
$ b private void port_DataReceived（object sender，SerialDataReceivedEventArgs e ）
{
//显示端口缓冲区中的所有输入数据
SerialPort sp =（SerialPort）sender;
string indata = sp.ReadExisting（）;
RcdPacket.Text = indata;
$ b private void GetPortList（）
{
listBox1.Items.Clear（）;
foreach（System.IO.Ports.SerialPort.GetPortNames（）中的字符串项）
{
//将每个检索到的可用prot名称存储到Listbox中...
listBox1 .Items.Add（项目）;
$ b private void WriteData_Click（object sender，EventArgs e）
{
string ProtocolMode = ModbusMode。 GetItemText（ModbusMode.SelectedItem）;
string portName1 = listBox1.GetItemText（listBox1.SelectedItem）;
if（listBox1.SelectedIndex == -1）
{
MessageBox.Show（请选择串口!!!）;
}
else
{
using（SerialPort port1 = new SerialPort（portName1））
{
if（port1！= null& amp; amp; ;& port1.IsOpen）
{
port1.Close（）;
}
port1.BaudRate = int.Parse（Baud_Rate.Text）;
port1.DataBits = int.Parse（Data.Text）;
port1.Parity =（Parity）Enum.Parse（typeof（Parity），Pari.Text）;
port1.StopBits =（StopBits）Enum.Parse（typeof（StopBits），Stop.Text）;
$ b if（ProtocolMode ==RTU）
{
port1.Open（）;
IModbusSerialMaster master1 = ModbusSerialMaster.CreateRtu（port1）;
int temp = ushort.Parse（WriteAdd.Text） - 1;
字节slaveId = byte.Parse（SlvIdd.Text）;
ushort startAdd =（ushort）（temp）;
ushort WrValue = ushort.Parse（WriteVal.Text）;
master1.WriteSingleRegister（slaveId，startAdd，WrValue）;
if（ProtocolMode ==ASCII）
{
port1.Open（）;
IModbusSerialMaster master1 = ModbusSerialMaster.CreateAscii（port1）;
int temp = ushort.Parse（WriteAdd.Text） - 1;
字节slaveId = byte.Parse（SlvIdd.Text）;
ushort startAdd =（ushort）（temp）;
ushort WrValue = ushort.Parse（WriteVal.Text）;
master1.WriteSingleRegister（slaveId，startAdd，WrValue）;
}
}
}
}
}
}
：//technet.microsoft.com/en-us/sysinternals/bb896644.aspxrel =nofollow> Portmon 来自Sysinternals。这也保证你所看到的实际上是港口上收到的货物
Hi I am trying to read the Serial Port Data. I used NModbus library for the modbus communication. Code works fine for read and write purpose. But sometimes i am having some unknown errors and i wanted to see the serial port activity. I tried using the SerialDataReceivedEventHandler but i am not getting anything from the port but still i am able to read the value of the holding registers. Here is my code. All i want to see the data packet being sent / received over the serial port.
namespace ModbusMaster
{
public partial class Form1 : Form
{
public Form1()
{
InitializeComponent();
this.Load += Form1_Load;
}
void Form1_Load(object sender, EventArgs e)
{
int[] baud = new int[] {4800,9600,19200,38400,57600,115200};
int[] databit = new int[] { 7, 8 };
int[] stpBits = new int[] { 1, 2 };
string[] party = new string[] { "None", "Odd", "Even" };
string[] Mode = new string[] { "ASCII", "RTU" };
ModbusMode.DataSource = Mode;
Baud_Rate.DataSource = baud;
Data.DataSource = databit;
Stop.DataSource = stpBits;
Pari.DataSource = party;
GetPortList();
}
private void button1_Click(object sender, EventArgs e)
{
string ProtocolMode = ModbusMode.GetItemText(ModbusMode.SelectedItem);
string portName = listBox1.GetItemText(listBox1.SelectedItem);
if (listBox1.SelectedIndex == -1)
{
MessageBox.Show("Please select Serial Port!!!");
}
else
{
using ( SerialPort port = new SerialPort(portName))
{
if (port != null && port.IsOpen)
{
port.Close();
}
// configure serial port
port.BaudRate = int.Parse(Baud_Rate.Text);
port.DataBits = int.Parse(Data.Text);
port.Parity = (Parity)Enum.Parse(typeof(Parity), Pari.Text);
port.StopBits = (StopBits)Enum.Parse(typeof(StopBits), Stop.Text);
port.DataReceived += new SerialDataReceivedEventHandler(port_DataReceived);
port.Open();
// create modbus master
if (ProtocolMode == "RTU")
{
IModbusSerialMaster master = ModbusSerialMaster.CreateRtu(port);
int temp = ushort.Parse(StrtAdd.Text)- 1;
byte slaveId = byte.Parse(Slave.Text);
ushort startAddress = (ushort)(temp);
ushort points = ushort.Parse(regis.Text);
ushort[] holding_register = new ushort[] { };
holding_register = master.ReadHoldingRegisters(slaveId, startAddress, points);
string tempString = " ";
foreach (ushort value in holding_register)
{
tempString += value + " ";
}
val.Text = tempString;
// val.Text = Convert.ToString(holding_register[0] + " " + holding_register[1]);
}
if (ProtocolMode == "ASCII")
{
IModbusSerialMaster master = ModbusSerialMaster.CreateAscii(port);
int temp = ushort.Parse(StrtAdd.Text)- 1;
byte slaveId = byte.Parse(Slave.Text);
ushort startAddress = (ushort)(temp);
ushort points = ushort.Parse(regis.Text);
ushort[] holding_register = new ushort[] { };
holding_register = master.ReadHoldingRegisters(slaveId, startAddress, points);
string tempString = " ";
foreach (ushort value in holding_register)
{
tempString += value + " ";
}
}
}
}
}
private void port_DataReceived(object sender, SerialDataReceivedEventArgs e)
{
// Show all the incoming data in the port's buffer
SerialPort sp = (SerialPort)sender;
string indata = sp.ReadExisting();
RcdPacket.Text = indata;
}
private void GetPortList()
{
listBox1.Items.Clear();
foreach (string item in System.IO.Ports.SerialPort.GetPortNames())
{
//store the each retrieved available prot names into the Listbox...
listBox1.Items.Add(item);
}
}
private void WriteData_Click(object sender, EventArgs e)
{
string ProtocolMode = ModbusMode.GetItemText(ModbusMode.SelectedItem);
string portName1 = listBox1.GetItemText(listBox1.SelectedItem);
if (listBox1.SelectedIndex == -1)
{
MessageBox.Show("Please select Serial Port!!!");
}
else
{
using (SerialPort port1 = new SerialPort(portName1))
{
if (port1 != null && port1.IsOpen)
{
port1.Close();
}
port1.BaudRate = int.Parse(Baud_Rate.Text);
port1.DataBits = int.Parse(Data.Text);
port1.Parity = (Parity)Enum.Parse(typeof(Parity), Pari.Text);
port1.StopBits = (StopBits)Enum.Parse(typeof(StopBits), Stop.Text);
if (ProtocolMode == "RTU")
{
port1.Open();
IModbusSerialMaster master1 = ModbusSerialMaster.CreateRtu(port1);
int temp = ushort.Parse(WriteAdd.Text) - 1;
byte slaveId = byte.Parse(SlvIdd.Text);
ushort startAdd = (ushort)(temp);
ushort WrValue = ushort.Parse(WriteVal.Text);
master1.WriteSingleRegister(slaveId, startAdd, WrValue);
}
if (ProtocolMode == "ASCII")
{
port1.Open();
IModbusSerialMaster master1 = ModbusSerialMaster.CreateAscii(port1);
int temp = ushort.Parse(WriteAdd.Text) - 1;
byte slaveId = byte.Parse(SlvIdd.Text);
ushort startAdd = (ushort)(temp);
ushort WrValue = ushort.Parse(WriteVal.Text);
master1.WriteSingleRegister(slaveId, startAdd, WrValue);
}
}
}
}
}
}
解决方案 If you just want to see the traffic that flows i recommend using Portmon from Sysinternals. This also guaranties that what you see is actually what was received on the port
这篇关于在C＃中读取Modbus串行端口数据的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！
查看全文
