关于欧姆龙HOSTLINK的通讯

[Z343012090]

一，ReceiveFromPLCdata = SerialPort1.ReadExisting()读取的数据就这样直接给变量了，也不知道这些数据前面是否带有格式，之类的数据，？
二， If Mid(Strings.Right(ReceiveFromPLCdata, 4), 1, 2) = FCSresult(Mid(ReceiveFromPLCdata, 1, Len(ReceiveFromPLCdata) - 4)) Then这一段比较干嘛要用到呢？
三，TextBox17.Text = Val("&H" + Mid(ReceiveFromPLCdata, 156, 4))
TextBox22.Text = Val("&H" + Mid(ReceiveFromPLCdata, 160, 4))
TextBox27.Text = Val("&H" + Mid(ReceiveFromPLCdata, 164, 4))
TextBox28.Text = Val("&H" + Mid(ReceiveFromPLCdata, 168, 4))
TextBox29.Text = Val("&H" + Mid(ReceiveFromPLCdata, 172, 4))
TextBox30.Text = Val("&H" + Mid(ReceiveFromPLCdata, 176, 4))
TextBox31.Text = Val("&H" + Mid(ReceiveFromPLCdata, 180, 4))
TextBox32.Text = Val("&H" + Mid(ReceiveFromPLCdata, 184, 4))
TextBox33.Text = Val("&H" + Mid(ReceiveFrom

FOMR上根本没有这么多的TEXTBOX，它来这么多
还有156，160，168，这些是怎么算出来的？
呼唤大神

[threenewbee]

http://download.csdn.net/download/qq_20170283/9687490

[Z343012090]

引用 1 楼 caozhy 的回复:

http://download.csdn.net/download/qq_20170283/9687490

请版主帮我解释一下，我用的是VB。NET。可是源码是用C#,源码最多只传送二个字节，不一样，我走的是HOSTLINK的FA模式，只要读取50个字节，