[英]Automatically execute a macro when a cell value is changed by a DDE/OPC link
当单元值由外部DDE / OPC链接更改时,我需要执行宏。 我已经使用Worksheet_Change函数尝试了几个示例,但这似乎仅在用户键入一个值时才起作用(即使那样,它也只能起作用一次)。
这是完整的代码(更改为“ Calculate”方法之后):
Private Sub Worksheet_Calculate() 'Calculate command will execute the macro when any value change the spreadsheet to recalculate
Dim ctr As Integer, n1 As String, v1 As Single, trigger As Long
'Application.EnableEvents = False
'Workbooks("Data Save.xls").Select
Sheets("Sheet1").Select
trigger = Range("b5").Value 'data save trigger cell linked to PLC
If trigger = 1 Then
Dim fn1 As String
fn1 = "C:\11047 RR\" & Range("B4") & ".csv" 'build a filename
Open fn1 For Output As 1
Print #1, Range("a1"); ","; Range("B1") 'batch number
Print #1, Range("a2"); ","; Range("B2") 'part number
Print #1, Range("a3"); ","; Range("B3") 'pass number
Print #1, Range("a4"); ","; Range("B4") 'filename
Print #1, "Date & Time:,"; Date$; ","; Time$
For ctr = 7 To 69
n1 = Sheets("Sheet1").Cells(ctr, 2).Value
v1 = Sheets("Sheet1").Cells(ctr, 3).Value
Print #1, ctr; ","; n1; ","; v1
Next ctr
Close 1
Sheets("Sheet1").Cells(5, 4) = 0 'put a zero into cell D5 in the spreadsheet
RSIchan = DDEInitiate("RSLinx", "Upsetter_11047")
DDEPoke RSIchan, "DataSaveFlag", Range("D5") 'write cell D5 out to the trigger word
DDETerminate (RSIchan)
MsgBox "Data saved"
Application.EnableEvents = True
End If
End Sub
您可以使用Calculate事件。 说单元格A1通过DDE刷新。 在另一个单元格中(例如B1),输入:
= A1
当刷新A1时,B1将重新计算,并且Calculate事件将被触发。
编辑#1 :
打开工作簿后,便立即计算该工作簿。 这意味着在打开工作簿时也会触发事件宏。 现在,如果B5最初包含文本而不是数字或为空,那么您将收到看到的错误消息。
例如,从一个空白工作表开始,在B5中放置一个空格并运行:
Sub dural()
Dim t As Long
t = Range("B5").Value
End Sub
您应该看到错误13。
编辑#2 :
在您发布的代码中,替换为:
trigger = Range("b5").Value
有:
Dim V As Variant
V = Range("B5").Value
If IsNumeric(V) Then
trigger = CLng(V)
Else
Application.EnableEvents = True
Exit Sub
End If
声明:本站的技术帖子网页,遵循CC BY-SA 4.0协议,如果您需要转载,请注明本站网址或者原文地址。任何问题请咨询:yoyou2525@163.com.