Serial port (com, boudrate, stopbit etc)

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Hi guys, I have C# programming wish to connected to my controller based on RTU Modbus, I wish record temperature in my PC real time using Visual Studio C# my project. Any body help me to solve my problem by received Serial Code Samples of yours. i wishing connected Real Time Controller with PC.

What I have tried:

VB

"Connect!" Then
    scm485.PortName = cbComm0.Text
    scm485.BaudRate = "9600"
    scm485.DataBits = "8"
    scm485.Parity = Parity.None
    scm485.StopBits = StopBits.Two
    scm485.RtsEnable = False
    scm485.DtrEnable = False
    scm485.WriteTimeout = 10000
    scm485.ReadTimeout = 10000
    scm485.Handshake = Handshake.XOnXOff
    scm485.Open()

    if scm485.IsOpen = True Then
        cmdEx.Text = "Disconnect!"

Posted 11-Jun-16 21:42pm

Member 12309874

Updated 11-Jun-16 22:19pm

George Jonsson

v2

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OriginalGriff 12-Jun-16 3:56am

And?
What is the problem?
What help do you need?

George Jonsson 12-Jun-16 4:12am

This is not C# code you are showing, it looks more like VB.
Which language are you really using?

Philippe Mori 12-Jun-16 19:09pm

My vote of 1... You are not even able to tag the proper language!

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Garth J Lancaster · Answer 1 · 2016-06-11T22:19:00

Well, you need to know what registers/coils you need to read - that is, what MODBUS functions, and the register/coil addresses you need to get data from - If you're using the .Net serial port implementation you're already up sh*t creek unfortunately, its DataReceived event may or may not play well with your device on the other end of the serial cable

There's a project set up here Simple Modbus Protocol in C# / .NET 2.0[^] that may help you get started, and a MODBUS protocol manual here http://modbus.org/docs/PI_MBUS_300.pdf[^] that may be useful

since as OG points out, you havnt told us what information/help you need and/or what MODBUS device you're using, thats about as much as one can offer you by way of help

[edit]
this GitHub - NModbus4/NModbus4: NModbus4 is a C# implementation of the Modbus protocol.[^] may also help
[/edit]