小弟最近做做一个项目，要求用vb做为上位机与plc通信，本人以前只用过HMI,对VB不太孰悉，各位大虾vb与plc如何通信呢．有没有实例程序供小弟参考下．谢谢

    Function NewPLCFXENTE(ByVal PortNum As String) As Object
        Try
            Dim PLCFX As New ActProgTypeLib.ActProgType
            Dim PLCType As Integer = 520
            Dim PLCUnitType As Integer = 74
            Dim PLCUnitNumber As Integer = 0
            Dim PLCPrgType As Integer = 5
            Dim PLCHostAddress As String = ""
            Dim PLCTimeOut = 500


            With PLCFX
                .ActCpuType = PLCType
                .ActUnitType = PLCUnitType
                .ActUnitNumber = PLCUnitNumber
                .ActProtocolType = PLCPrgType
                ' .ActHostAddress = "192.168.1." & PortNum
                .ActHostAddress = PortNum
                .ActTimeOut = PLCTimeOut
            End With

            Return PLCFX
        Catch ex As Exception
            MsgBox(ex.Message)
            MLog.LogErrWrite(ex.ToString)
        End Try

    End Function

  PLC0 = PLCM.NewPLCFXENTE(IPAddress(0))
            PLCConErr(0) = PLC0.Open

是的，适用于FX3U-ENET-ADP 模块；其他端口可能设置参数不一样

你好，我QQ是几个月登录一次的。用问题可以私信给我，大家探讨一下，这段时间我每天会登录一下看看的