#Region "傳送>讀>雙字浮點"
    Public Function fun讀雙字浮點_MITSUBISHI_PLC_FN2N(ByVal strAdrRead As String) As String
        '----------------------------------------------------------------------------------------------------
        '傳送報文>Chr(2)   00     00     00     00     Chr(3)   YY
        '含    義>起始字元 命令碼 地址高 地址低 位陣列 結尾字元 校驗
        '----------------------------------------------------------------------------------------------------
        '返回報文>Chr(2)   00     00     00    00      Chr(3)   00
        '含    義>起始字元 資料高 資料低 資料高 資料低 結尾字元 校驗
        '----------------------------------------------------------------------------------------------------
        On Error Resume Next
        If strAdrRead = Nothing Then Return Nothing

        '轉換地址
        Dim strAdrFx2n As String = fun地址_MITSUBISHI_FN2N(strAdrRead)

        Dim fxCmd As String
        Dim fxReadCmd As String '報文 

        fxCmd = "0" + strAdrFx2n + "04"

        fxReadCmd = fxCmd + Chr(3)
        fxReadCmd = Chr(2) + fxReadCmd + funCheckSum(fxReadCmd)

        '清除緩衝區
        Dim strReStr As String = Me.comRS232.ReadExisting()

        '發出報文
        Me.comRS232.Write(fxReadCmd) '發出報文

        '返回資料
        Return fun讀雙字浮點返回_MITSUBISHI_PLC_FN2N(12, intTimeWait)
    End Function
#End Region

#Region "返回>讀>雙字浮點"
    Private Function fun讀雙字浮點返回_MITSUBISHI_PLC_FN2N(ByVal intStrLen As Integer, ByVal DT As Integer) As String
        'On Error Resume Next

        Dim TT As Integer
        TT = Environment.TickCount() '取得系統毫秒數

        '設定時間內結束迴圈
        '接收數量達到後跌出迴圈
        Do Until Environment.TickCount() - TT > DT
            System.Windows.Forms.Application.DoEvents()
            If Me.comRS232.BytesToRead >= intStrLen Then Exit Do '
        Loop

        If Me.comRS232.BytesToRead <> intStrLen Then Return Nothing

        '提取資料
        Dim strReData As String = Me.comRS232.ReadExisting()

        '校驗位對比
        If Not strReData.Substring(10, 2) = funCheckSum(strReData.Substring(1, 9)) Then Return Nothing
        '----------------------------------------------------------------------------------------------------

        '整理資料
        Dim strIntD(3) As Byte
        strIntD(0) = Val("&H" & (strReData.Substring(1, 2)))
        strIntD(1) = Val("&H" & (strReData.Substring(3, 2)))
        strIntD(2) = Val("&H" & (strReData.Substring(5, 2)))
        strIntD(3) = Val("&H" & (strReData.Substring(7, 2)))

        '返回
        Return BitConverter.ToSingle(strIntD, 0)
    End Function
#End Region