Option Explicit

Option Base 1

Const ServerName = "OPCServer.WinCC"

Dim WithEvents MyOPCServer As OPCServer

Dim WithEvents MyOPCGroup As OPCGroup

Dim MyOPCGroupColl As OPCGroups

Dim MyOPCItemColl As OPCItems

Dim MyOPCItems As OPCItems

Dim MyOPCItem As OPCItem

Dim ClientHandles(6) As Long

Dim ServerHandles() As Long

Dim Values(1) As Variant

Dim Errors() As Long

Dim ItemIDs(6) As String

Dim GroupName As String

Dim NodeName As String

Dim itemv(6) As Variant

Dim ii As Integer



'---------------------------------------------------------------------

' Sub StartClient()



' 目的：连接至OPC_server，创建组和添加条目



'---------------------------------------------------------------------

Sub StartClient()

' On Error GoTo ErrorHandler



'----------- 可以自由选择ClientHandle和GroupName

For ii = 1 To 6

ClientHandles(ii) = ii

Next ii

GroupName = "MyGroup"



'----------- 从单元“A1”得到ItemID



NodeName = Range("c2").Value

ItemIDs(1) = Range("c3").Value

ItemIDs(2) = Range("c4").Value

ItemIDs(3) = Range("c5").Value

ItemIDs(4) = Range("c6").Value

ItemIDs(5) = Range("c7").Value

ItemIDs(6) = Range("c8").Value



'----------- 得到一个OPC服务器的实例



Set MyOPCServer = New OPCServer

MyOPCServer.Connect ServerName, NodeName

Set MyOPCGroupColl = MyOPCServer.OPCGroups

'----------- 为添加组设置缺省的激活状态

MyOPCGroupColl.DefaultGroupIsActive = True



'----------- 添加组至收集

Set MyOPCGroup = MyOPCGroupColl.Add(GroupName)

Set MyOPCItemColl = MyOPCGroup.OPCItems



'----------- 添加一个条目、返回ServerHandles

MyOPCItemColl.AddItems 6, ItemIDs(), ClientHandles(), ServerHandles(), Errors



'----------- 用于接受不同的信息组

MyOPCGroup.IsSubscribed = True

Exit Sub

ErrorHandler:

MsgBox "Error: " & Err.Des cription, vbCritical, "ERROR"

End Sub

'---------------------------------------------------------------------

' Sub StopClient()

' 目的：从服务器释放对象并且断开连接

'---------------------------------------------------------------------

Sub StopClient()

'----------- 释放组和服务器对象

MyOPCGroupColl.RemoveAll



'----------- 与服务器断开连接并且清除



MyOPCServer.Disconnect

Set MyOPCItemColl = Nothing

Set MyOPCGroup = Nothing

Set MyOPCGroupColl = Nothing

Set MyOPCServer = Nothing

End Sub

'---------------------------------------------------------------------

' Sub MyOPCGroup_DataChange()



' 目的：组中的数值、质量或时间标志改变时，该事件激活



'---------------------------------------------------------------------



'----------- 如果OPC-DA Automation 2.1被安装，使用：



Private Sub MyOPCGroup_DataChange(ByVal TransactionID As Long, ByVal NumItems As Long, ClientHandles() As Long, itemvalues() As Variant, Qualities() As Long, TimeStamps() As Date)

'----------- 设置数据表单元值为数值读

For ii = 1 To NumItems

itemv(ClientHandles(ii)) = itemvalues(ii)

Next ii

Range("d3").Value = CStr(itemv(1))

Range("d4").Value = CStr(itemv(2))

Range("d5").Value = CStr(itemv(3))

Range("d6").Value = CStr(itemv(4))

Range("d7").Value = CStr(itemv(5))

Range("d8").Value = CStr(itemv(6))

End Sub

//------------------------------------
我如果只是改成这样的话，就出错了。
Const ServerName = "\\MYCOMPUTER\OPCServer.WinCC"
\\MYCOMPUTER\为局域网其他计算机名称。

其他OPC客户端也不能访问