1、欧姆龙plc编程软件
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欧姆龙plc编程软件集成了CX-ProgrammerV9.5，能够为欧姆龙PLC编程提供全面的软件支持，本版本为最新版，全面支持32/64位WIN8系统，为多国语言版，支持简体中文。能为网络、可编程终端及伺服系统、电子温度控制等进行设置。适用于已具有电气系统知识（电气工程师或等同者）的负责安装FA系统者、负责设计FA系统者和负责管理和维护FA系统者使用。
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3、西门子step7
STEP7是西门子的最经典的编程软件，其中对应着西门子S7-300/400系列，属于西门子旧款PLC的代表作。STEP7具有以下功能:硬件配置和参数设置、通讯组态、编程、测试、启动和维护、文件建档、运行和诊断功能等。STEP7的所有功能均有大量的在线帮助，用鼠标打开或选中某一对象，按F1可以得到该对象的相关帮助。
在STEP7中，用项目来管理一个自动化系统的硬件和软件。STEP7用SIMATIC管理器对项目进行集中管理，它可以方便地浏览SIMATICS7、M7、C7和WinAC的数据。实现STEP7各种功能所需的SIMATIC软件工具都集成在STEP7中。
4、西门子博途
TIA博途是全集成自动化软件TIAportal的简称，是西门子工业自动化集团发布的一款全新的全集成自动化软件。它是业内首个采用统一的工程组态和软件项目环境的自动化软件，几乎适用于所有自动化任务。借助该全新的工程技术软件平台，用户能够快速、直观地开发和调试自动化系统。
5施耐德编程软件
UnityProXL是施耐德电气自动化的核心产品，它是新一代软硬件自动化平台。其全新的独创设计缩短了开发时间，处理器的灵活性可以实现更高的性能。基于开放性以及对工具的协同式应用，Unity在软件开发和控制系统运行上达到了更高水平，它将生产率的提高放在首位。
6、松下plc编程软件
松下FP系列PLC编
a = (":010612000020C70D0A")'这里肯定有问题
括号必须在引号里面，不然编译不过的
你的问题是没有发送确认符，一般串口指令末尾都有换行确认符vbCr，下位机接收到vbCr后才认为是一条完整指令，改成下面的试验
Dim a As String = ":010612000020C70D0A" vbCr
松下不是有PC通讯解决方案吗？
我之前用的VB.NET的代码：
Imports System.Net
Imports System.Runtime.InteropServices
Public Class Form1
Dim Handle1 As Int32
Dim EntLink As Boolean
Dim ScanCount As Long
Dim PLC As New NaisTcpFp.PlcClient 'TCP:NaisTcpFp.DLL/COM:NaisComFP.DLL
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
Dim i As Short
Me.CenterToScreen()
cmbReadMry.Items.Clear()
cmbReadMry.Items.Add("WX")
cmbReadMry.Items.Add("WY")
cmbReadMry.Items.Add("WR")
cmbReadMry.Items.Add("DT")
'
cmbWriteMry.Items.Clear()
cmbWriteMry.Items.Add("WX")
cmbWriteMry.Items.Add("WY")
cmbWriteMry.Items.Add("WR")
cmbWriteMry.Items.Add("DT")
'
cmbBitMry.Items.Clear()
cmbBitMry.Items.Add("X")
cmbBitMry.Items.Add("Y")
cmbBitMry.Items.Add("R")
cmbBitMry.Items.Add("D")
'
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")
For i = 0 To 15 Step 1
cmbBit.Items.Add("Bit" i)
Next i
cmbReadMry.SelectedIndex = 3
cmbWriteMry.SelectedIndex = 3
cmbBitMry.SelectedIndex = 1
cmbBit.SelectedIndex = 0
cmbReadType.SelectedIndex = 0
cmbWriteType.SelectedIndex = 0
lstRead.Items.Clear()
txtWrite.Text = ""
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)
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
If Not EntLink 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 EntLink Then
MsgBox("还未与PLC建立联接！")
Exit Sub
End If
re = PLC.CmdRead(Handle1, 1, cmbReadMry.SelectedIndex + 1, cmbReadType.SelectedIndex + 1, Val(txtReadAdd.Text), 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
re = PLC.CmdWrite(Handle1, 1, cmbWriteMry.SelectedIndex + 1, cmbWriteType.SelectedIndex + 1, Val(txtWriteAdd.Text), Val(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 EntLink Then
MsgBox("还未与PLC建立联接！")
Exit Sub
End If
Timer1.Enabled = Not Timer1.Enabled
If Timer1.Enabled Then
ScanCount = 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 EntLink 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
ScanCount += 1
txtScanCnt.Text = ScanCount
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 EntLink Then
MsgBox("还未与PLC建立联接！")
Exit Sub
End If
Dim rd As Boolean
Dim re As Short
re = PLC.Bit_Test(Handle1, 1, cmbBitMry.SelectedIndex + 1, Val(txtBitAdd.Text), cmbBit.SelectedIndex, 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 EntLink Then
MsgBox("还未与PLC建立联接！")
Exit Sub
End If
Dim re As Short
re = PLC.Bit_Set(Handle1, 1, cmbBitMry.SelectedIndex + 1, Val(txtBitAdd.Text), cmbBit.SelectedIndex)
txtReBit.Text = re
End Sub
Private Sub butBitRst_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles butBitRst.Click
If Not EntLink Then
MsgBox("还未与PLC建立联接！")
Exit Sub
End If
Dim re As Short
re = PLC.Bit_Reset(Handle1, 1, cmbBitMry.SelectedIndex + 1, Val(txtBitAdd.Text), cmbBit.SelectedIndex)
txtReBit.Text = re
End Sub
End Class
自然是选个PLC以太网模块，用网线和个人电脑的网卡链接（有的型号需要专用网卡）。1、需要熟悉你所用的PLC程序、功能、控制工艺。2、需要知道VB转换成以太网通讯的编程关系。3、不是触摸屏是 鼠标点击屏。4、有点难度和门槛。祝成功！！！
