vb.net以太网通讯 vb以太网通讯程序-重庆大橙子建站

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vb.net以太网通讯 vb以太网通讯程序

用vb.net实现网络通信

用 vb.net socket通信

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Dim th As Threading.Thread

2 Dim tcpl As System.Net.Sockets.TcpListener

4 Private Sub Form1_Load()Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load

5 th = New System.Threading.Thread(New System.Threading.ThreadStart(AddressOf MyListen))

6 th.Start()

7 End Sub

9 Public Sub SendMessage()Sub SendMessage(ByVal IP As String, ByVal SendMsg As String)

10 Try

11 If IP "" Then

12 Dim tcpc As New System.Net.Sockets.TcpClient(IP, 5656)

13 Dim tcpStream As Net.Sockets.NetworkStream = tcpc.GetStream

14 Dim reqStream As New IO.StreamWriter(tcpStream)

15 reqStream.Write(SendMsg)

16 reqStream.Flush()

17 tcpStream.Close()

18 tcpc.Close()

19 End If

20 Catch ex As Exception

21 MsgBox(ex.Message.ToString)

22 End Try

23 End Sub

24 Private Sub MyListen()Sub MyListen()

25 Try

26 Dim ipAddress As System.Net.IPAddress = System.Net.Dns.Resolve(System.Net.Dns.GetHostName).AddressList(0)

27 tcpl = New System.Net.Sockets.TcpListener(ipAddress, 5656)

28 tcpl.Start()

29 While True

30 Dim s As System.Net.Sockets.Socket = tcpl.AcceptSocket()

31 Dim MyBuffer(1024) As Byte

32 Dim i As Integer

33 i = s.Receive(MyBuffer)

34 If i 0 Then

35 Dim lstrRec As String

36 Dim j As Integer

37 For j = 0 To i - 1

38 TextBox1.Text += Chr(MyBuffer(j)) ","

39 Next

40 End If

41 End While

42 Catch ex As Exception

43 MsgBox(ex.Message.ToString)

44 End Try

45 End Sub

47 Private Sub Button1_Click()Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click

48 SendMessage("192.168.0.61", TextBox2.Text)

49 End Sub

如何用vb.net通过以太网使用modulebus协议读写西门子s7-200 smart 能实现吗？

没用过modbus通信写过，但是使用自由通信可以

VB.net带有通信控件，在里面设置波特率、奇偶效验、数据位、COM口

在PLC里做个自由通信就可以

能给我发个VB与三菱PLC通讯的源代码实例吗，非常感谢啊

得说明是什么型号的PLC啊，串口还是网口，VB6还是VB.NET？

算了，写段代码，VB.NET与Q系列以太网通讯的：

Imports System.Net

Imports System.Runtime.InteropServices

Public Class Form1

Dim Handle1 As Int32

Dim EntLink1 As Boolean

Dim ScanCount1 As Long

Dim PLC As New EntQsPlc_Asc.PlcClient'EntQsPlc_ASC.DLL是Q系列以太网通讯组件

Public Declare Function timeGetTime Lib "winmm.dll" () As UInt32

Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load

Me.CenterToScreen()

cmbReadMry.Items.Clear()

cmbReadMry.Items.Add("X")

cmbReadMry.Items.Add("Y")

cmbReadMry.Items.Add("M")

cmbReadMry.Items.Add("D")

cmbReadMry.Items.Add("R")

cmbReadMry.Items.Add("Z")

cmbWriteMry.Items.Clear()

cmbWriteMry.Items.Add("X")

cmbWriteMry.Items.Add("Y")

cmbWriteMry.Items.Add("M")

cmbWriteMry.Items.Add("D")

cmbWriteMry.Items.Add("R")

cmbWriteMry.Items.Add("Z")

cmbBitMry.Items.Clear()

cmbBitMry.Items.Add("X")

cmbBitMry.Items.Add("Y")

cmbBitMry.Items.Add("M")

cmbReadType.Items.Clear()

cmbReadType.Items.Add("INT16")

cmbReadType.Items.Add("UINT16")

cmbReadType.Items.Add("DINT32")

cmbReadType.Items.Add("HEX32")

cmbReadType.Items.Add("REAL32")

cmbReadType.Items.Add("BIN16")

cmbWriteType.Items.Clear()

cmbWriteType.Items.Add("INT16")

cmbWriteType.Items.Add("UINT16")

cmbWriteType.Items.Add("DINT32")

cmbWriteType.Items.Add("HEX32")

cmbWriteType.Items.Add("REAL32")

cmbWriteType.Items.Add("BIN16")

cmbReadMry.SelectedIndex = 3

cmbWriteMry.SelectedIndex = 3

cmbBitMry.SelectedIndex = 2

cmbReadType.SelectedIndex = 0

cmbWriteType.SelectedIndex = 0

lstRead.Items.Clear()

txtWrite.Text = ""

cmbCmdType.SelectedIndex = 0

End Sub

Private Sub butLink_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles butLink.Click

Dim re As Short

Dim restr As String = ""

re = PLC.EntLink(Trim(txtLocalIP.Text), Val(txtLocalPort.Text), Trim(txtRemoteIP.Text), Val(txtRemotePort.Text), "DEMO", Handle1, 1000, CBool(cmbCmdType.SelectedIndex))

txtReLink.Text = re.ToString

If re = 0 Then

EntLink1 = True

MsgBox("PLC联接成功! ")

Else

EntLink1 = False

MsgBox("PLC联接失败: " restr)

End If

End Sub

Private Sub butClose_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles butClose.Click

Dim re As Short

If Not EntLink1 Then

MsgBox("还未与PLC建立联接！")

Exit Sub

End If

re = PLC.DeLink(Handle1)

txtReClose.Text = re.ToString

End Sub

Private Sub butRead_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles butRead.Click

Dim re As Short

Dim i As Short

Dim RD() As Object

ReDim RD(Val(txtReadCnt.Text - 1))

If Not EntLink1 Then

MsgBox("还未与PLC建立联接！")

' Exit Sub

End If

Dim mry As EntQsPlc_Asc.PlcClient.PlcMemory = cmbReadMry.SelectedIndex + 1

Dim typ As EntQsPlc_Asc.PlcClient.DataType = cmbReadType.SelectedIndex + 1

re = PLC.CmdRead(Handle1, mry, typ, CInt(txtReadAdd.Text), CUShort(txtReadCnt.Text), RD)

txtReRead.Text = re.ToString

lstRead.Items.Clear()

For i = 0 To UBound(RD) Step 1

If Not IsNothing(RD(i)) Then lstRead.Items.Add(RD(i))

Next i

If re 0 Then

Timer1.Enabled = False

butScan.Text = "Cycle R/W"

End If

End Sub

Private Sub butWrite_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles butWrite.Click

Dim re As Short

Dim i As Short

Dim temp() As String

Dim WD() As Object

If Not EntLink1 Then

MsgBox("还未与PLC建立联接！")

Exit Sub

End If

ReDim WD(Val(txtWriteCnt.Text) - 1)

temp = Split(txtWrite.Text, vbCrLf)

For i = 0 To UBound(WD) Step 1

If i UBound(temp) Then

WD(i) = 0

Else

WD(i) = Trim(temp(i))

End If

Next i

Dim mry As EntQsPlc_Asc.PlcClient.PlcMemory = cmbWriteMry.SelectedIndex + 1

Dim typ As EntQsPlc_Asc.PlcClient.DataType = cmbWriteType.SelectedIndex + 1

re = PLC.CmdWrite(Handle1, mry, typ, CInt(txtWriteAdd.Text), CUShort(txtWriteCnt.Text), WD)

txtReWrite.Text = re.ToString

If re 0 Then

Timer1.Enabled = False

butScan.Text = "Cycle R/W"

End If

End Sub

Private Sub butScan_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles butScan.Click

If Not EntLink1 Then

MsgBox("还未与PLC建立联接！")

Exit Sub

End If

Timer1.Enabled = Not Timer1.Enabled

If Timer1.Enabled Then

ScanCount1 = 0

butScan.Text = "Stop R/W"

Else

butScan.Text = "Cycle R/W"

End If

End Sub

Private Sub Timer1_Tick(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Timer1.Tick

Timer1.Enabled = False

Dim tim As Integer = timeGetTime

If Not EntLink1 Then

MsgBox("还未与PLC建立联接！")

Exit Sub

End If

Call butRead_Click(Nothing, Nothing)

Call butWrite_Click(Nothing, Nothing)

If (Val(txtReRead.Text) 0) Or (Val(txtReWrite.Text) 0) Then

butScan.Text = "Cycle R/W"

Exit Sub

Else

ScanCount1 += 1

txtScanCnt.Text = ScanCount1

txtScanPrd.Text = (timeGetTime - tim) "ms"

End If

Timer1.Enabled = True

End Sub

Private Sub butBitTest_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles butBitTest.Click

If Not EntLink1 Then

MsgBox("还未与PLC建立联接！")

Exit Sub

End If

Dim rd As Boolean

Dim re As Short

Dim mry As EntQsPlc_Asc.PlcClient.PlcMemory = cmbBitMry.SelectedIndex + 1

re = PLC.Bit_Test(Handle1, mry, CUShort(txtBitAdd.Text), rd)

txtBitTest.Text = rd

txtReBit.Text = re

End Sub

Private Sub butBitSet_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles butBitSet.Click

If Not EntLink1 Then

MsgBox("还未与PLC建立联接！")

Exit Sub

End If

Dim re As Short

re = PLC.Bit_Set(Handle1, cmbBitMry.SelectedIndex + 1, Val(txtBitAdd.Text))

txtReBit.Text = re

End Sub

Private Sub butBitRst_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles butBitRst.Click

If Not EntLink1 Then

MsgBox("还未与PLC建立联接！")

Exit Sub

End If

Dim re As Short

re = PLC.Bit_Reset(Handle1, cmbBitMry.SelectedIndex + 1, Val(txtBitAdd.Text))

txtReBit.Text = re

End Sub

End Class

谁有VB和OMRON PLC 通信例子啊？能否发个原始代码？再次特别感谢！

提供一个VB.NET与OMRON以太网通讯的代码，是我项目里面复制出来的：

Dim Handle1 As Int32 'PLC的连接句柄

Dim EntLink As Boolean '连接标志

Dim PLC As New FinsTcp.PlcClient '引用OMRON的通讯组件

Private Sub butLink_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles butLink.Click

Dim re As Short

Dim restr As String = ""

re = PLC.EntLink(Trim(txtLocalIP.Text), Val(txtLocalPort.Text), Trim(txtRemoteIP.Text), Val(txtRemotePort.Text), "DEMO", Handle1)

txtReLink.Text = re.ToString

If re = 0 Then

EntLink = True

MsgBox("PLC联接成功! ")

Else

EntLink = False

MsgBox("PLC联接失败: " restr)

End If

End Sub

Private Sub butClose_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles butClose.Click

Dim re As Short

EntLink = False

re = PLC.DeLink(Handle1)

txtReClose.Text = re.ToString

End Sub

Private Sub butRead_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles butRead.Click

Dim re As Short

Dim i As Short

Dim RD() As Object

ReDim RD(Val(txtReadCnt.Text - 1))

If Not EntLink Then

MsgBox("还未与PLC建立联接！")

Exit Sub

End If

Dim mry As FinsTcp.PlcClient.PlcMemory = cmbReadMry.SelectedIndex + 1

Dim typ As FinsTcp.PlcClient.DataType = cmbReadType.SelectedIndex + 1

re = PLC.CmdRead(Handle1, mry, typ, CUShort(Val(txtReadAdd.Text)), CUShort(Val(txtReadCnt.Text)), RD)

txtReRead.Text = re.ToString

lstRead.Items.Clear()

For i = 0 To UBound(RD) Step 1

If Not IsNothing(RD(i)) Then lstRead.Items.Add(RD(i))

Next i

If re 0 Then

Timer1.Enabled = False

butScan.Text = "Cycle R/W"

End If

End Sub

Private Sub butWrite_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles butWrite.Click

Dim re As Short

Dim i As Short

Dim temp() As String

Dim WD() As Object

If Not EntLink Then

MsgBox("还未与PLC建立联接！")

Exit Sub

End If

ReDim WD(Val(txtWriteCnt.Text) - 1)

temp = Split(txtWrite.Text, vbCrLf)

For i = 0 To UBound(WD) Step 1

If i UBound(temp) Then

WD(i) = 0

Else

WD(i) = Trim(temp(i))

End If

Next i

Dim mry As FinsTcp.PlcClient.PlcMemory = cmbWriteMry.SelectedIndex + 1

Dim typ As FinsTcp.PlcClient.DataType = cmbWriteType.SelectedIndex + 1

re = PLC.CmdWrite(Handle1, mry, typ, CUShort(Val(txtWriteAdd.Text)), CUShort(Val(txtWriteCnt.Text)), WD)

txtReWrite.Text = re.ToString

If re 0 Then

Timer1.Enabled = False

butScan.Text = "Cycle R/W"

End If

End Sub

使用vb.net将以太网共享给虚拟wifi网络

最简单的办法是用句柄操作窗体，这种方法就好比是计算机在代替你在打开设置窗口，完成设置。

比较难实现的方法是用API，不过我不知道用那些API，而且还要驱动支持

因为vb。net是高级语言，不能直接操作驱动，所以直接写汇编是不可行的

VB与VB.NET串口及以太网通迅

关于串口通讯的问题：

很明显，你还不知道（不会、不习惯）使用事件驱动的方式接收数据。

建议你仔细看看串口组件（无论VB6还是VB.net）的OnComm事件，你的问题很容易解决。

关于以太网通讯：

在TCP通讯中端口确实可以重用，你百度一下“TCP端口重用”能查到很多示例。

但绝大多数情况下不推荐端口重用，而应该采取服务器端建立连接池的方法。

或者，干脆不用TCP，用UDP解决也可以。

网站名称：vb.net以太网通讯 vb以太网通讯程序
网页路径：http://cqwzjz.cn/article/hijhes.html

新闻中心

用vb.net实现网络通信

如何用vb.net通过以太网使用modulebus协议读写西门子s7-200 smart 能实现吗？

能给我发个VB与三菱PLC通讯的源代码实例吗，非常感谢啊

谁有VB和OMRON PLC 通信例子啊？能否发个原始代码？ 再次特别感谢！

使用vb.net将以太网共享给虚拟wifi网络

VB与VB.NET串口及以太网通迅

其他资讯

谁有VB和OMRON PLC 通信例子啊？能否发个原始代码？再次特别感谢！