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vb.net与三菱plc 三菱plc和labview通讯
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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
相关问答
Q1: vb.net 2010与三菱PLC通讯
为何不使用三菱的MX Component部件呢？在三菱官网可以下载4.08版本，支持VS2010，你可以在MX软件的手册上找到例程。
Q2: VB.net2010 通过三菱MX Componet软件与FX 3u PLC通讯，造成界面卡顿，如何解决？
那个控件好像是阻塞的，可以放在线程里面，或者自己去了解协议，自己写驱动
Q3: vb.net与三菱PLC通讯线通讯代码,急用，能读写IO及数据寄存器即可
PLCvb.net与三菱plc的协议厂家一般都不会公开，不过厂家都有提供高级语言开发的解决方案，百度一下能找到相关资料，三菱的ENTFXPLC，ENTQSPLC,西门子的WINTCPS7，欧姆龙的FINSTCP都有VB.NET和C#的范例的vb.net与三菱plc；
Q4: 大神，你好。我最近在学VB.net,我需要与omron或者三菱PLC进行通讯，有案例嘛？
西门子vb.net与三菱plc：WinTcpS7,三菱vb.net与三菱plc：EntQsPlc,欧姆龙：FinsTCPvb.net与三菱plc，百度都能搜到资源vb.net与三菱plc的vb.net与三菱plc；
Q5: VB和三菱Q系列PLC通信
1.0 通讯组件概述
通讯组件用于PC与可编程控制器(PLC)、智能仪表等进行数据通讯，适用于基于PC高级语言的工业自动化控制系统。组件采用动态链接库文件(*.DLL)的形式，在PC系统的项目工程里引用该组件，调用相应的属性与方法函数，即可快速实现PC与PLC的高效数据交换。
DLL通讯组件无须安装，直接复制到工程文件目录，方便打包安装部署；无须任何配置，直接调用函数，与应用开发无缝衔接；多年工程经验的软件团队开发测试，经过本公司及客户的海量实际工程应用检验，稳定可靠；采用稳定高效的内部协议，无须编写PLC内部程序配合，直接访问PLC的内存，通讯响应快速；内建动态管理的多独立线程连接，同时支持外部应用的多线程结构调用；兼容WINDOWS系统下的所有开发环境，包括各种版本的VB.NET、C#、VC++，以及DEIPHI 、VB、LabView等；支持几乎所有PLC的CPU自带通讯口、通讯扩展模块。
你可以在技成看视频教程，这个案例比较经典，看视频更容易理解。
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