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

能不能具体一点呢
譬如 Lcpu WindowsXP 32 以太网口...

vb可以用MX ComponentV4，里面的控件编写比较容易，不用了解通讯协议，软件里有例程。

论坛上已经有大师发表过的，找找

新项目用vb的应该属于比较奇葩的。不过vb确实挺好用的。

求教 假如我用FX3U-ENET-ADP 与VB连接呢 ，可否做一个简单一点的程序给我们看看（强调简单一点不然对初学者来说看不懂）望各位前辈赐教，感激不尽

为什么不用LABVIEW呢？新手用VB估计要写死人。。。

引用

引用第7楼liuqiang2012于2016-04-25 10:40发表的  :
为什么不用LABVIEW呢？新手用VB估计要写死人。。。

LABVIEW可以做一个程序看看不

    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

引用

引用第9楼shuangyu于2016-04-25 15:05发表的  :
    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
.......

你这行代码是以太网的吗

是的，适用于FX3U-ENET-ADP 模块；其他端口可能设置参数不一样