誰有VB和OMRON PLC 通信例子?。磕芊癜l(fā)個原始代碼？ 再次特別感謝！

提供一個VB.NET與OMRON以太網通訊的代碼，是我項目里面復制出來的：

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Dim?Handle1?As?Int32?'PLC的連接句柄

Dim?EntLink?As?Boolean?'連接標志

Dim?PLC?As?New?FinsTcp.PlcClient?'引用OMRON的通訊組件

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聯接成功!?")

Else

EntLink?=?False

MsgBox("PLC聯接失敗:?"??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("還未與PLC建立聯接！")

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("還未與PLC建立聯接！")

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

如何用vb.net通過以太網使用modulebus協議讀寫西門子s7-200 smart 能實現嗎？

沒用過modbus通信寫過，但是使用自由通信可以

VB.net帶有通信控件，在里面設置波特率、奇偶效驗、數據位、COM口

在PLC里做個自由通信就可以

用vb.net實現網絡通信

用 vb.net socket通信

Dim th As Threading.Thread

2 Dim tcpl As System.Net.Sockets.TcpListener

3

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

8

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

46

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

本文標題：vb.net以態(tài)網通訊,vbnet tcp通訊
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