Yokogawa JUXTA M Series Digital Limit Alarms MVTK Manual do Utilizador descarregar pdf (Página 37)

3-23

IM 77J04J11-01E 1st Edition : 2006.08.25-00

'Initialize label control that displays character strings sent and received

Label1.Caption = ""

Label2.Caption = ""

End Sub

--------------------------------------------------------------------------------

'This processing starts each time 1 byte is received

Private Sub MSComm1_OnComm()

Dim strBuf0 As String

Select Case MSComm1.CommEvent

Case comEvReceive

strBuf0 = MSComm1.Input '

Select Case strBuf0 'Case classification based on 1 byte received

Case Chr(2) 'When it is stx

strBuf1 = "[stx]"

Case Chr(3) 'When it is etx

strBuf1 = strBuf1 & "[etx]"

Case Chr(13) 'When it is cr

strBuf1 = strBuf1 & "[cr]"

'This is provided as a measure against the fact that a command sent may

'be seen as response depending on a combination with communication

'converter.

If strBuf1 = Label1.Caption Then

strBuf1 = ""

Else

strReceive = strBuf1 'Completion of character string received

fSend = False 'Receiving is regarded as being ended

End If

Case Else 'When it is not stx, etx, or cr

strBuf1 = strBuf1 & strBuf0

End Select

Case Else

End Select

End Sub

--------------------------------------------------------------------------------

'Timeout

Private Sub Timer1_Timer()

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Yokogawa JUXTA M Series Digital Limit Alarms MVTK Manual do Utilizador Página 37