"STM32. Net MF Development Board Learning-05" PC Remote control Development Board via Modbus protocol

Source: Internet
Author: User

Since 2002 began to contact the Modbus agreement, in the future in the PLC, DOS, Windows,. Net Micro framework, such as the use of the Protocol, in my previous blog to write a detailed record of this experience, interested friends can look at the " My Modbus slave/client development process (RTU/ASCII/TCP). The protocol is open, concise and reliable, at present most intelligent instruments, intelligent modules and some PLC have adopted the protocol, some time ago, a netizen asked about the relevant Modbus problem, so here on the implementation of the Modbus as a. Net MF Development Board example serial port.

This example consists of two parts, one running on the development Board, as the Modbus RTU slave service, and the other part of the typical. Net framework code that implements the Modbus RTU client-side functionality, You can use the Slave service on the Development Board to control the LED lights on the development Board and get the button status.

The implementation of the Slave class is as follows (see sample source code for specific implementation):

namespace YFSoft.Modbus
    public class Slave
        public event ReadDataEventHandler ReadData;
        public event WriteDataEventHandler WriteData;
        public void Start(string portName, int baudRate, Parity parity);
        public void Stop();

The call is relatively simple and the code is as follows:

public static void Main()
            Graphics.Print("Modbus Rtu Test\r\n");
            … …
            RtuSlave.ReadData += new ReadDataEventHandler(RtuSlave_ReadData);
            RtuSlave.WriteData += new WriteDataEventHandler(RtuSlave_WriteData);
            RtuSlave.Start("COM2", 19200, System.IO.Ports.Parity.None);
            int index = 0;
            while (true)
                Graphics.FillRectangle(0, 305, 240, 15, Color.White);
                Graphics.DrawString(5, 306, (index++).ToString(), Color.Blue);

Contact Us

The content source of this page is from Internet, which doesn't represent Alibaba Cloud's opinion; products and services mentioned on that page don't have any relationship with Alibaba Cloud. If the content of the page makes you feel confusing, please write us an email, we will handle the problem within 5 days after receiving your email.

If you find any instances of plagiarism from the community, please send an email to: info-contact@alibabacloud.com and provide relevant evidence. A staff member will contact you within 5 working days.

A Free Trial That Lets You Build Big!

Start building with 50+ products and up to 12 months usage for Elastic Compute Service

  • Sales Support

    1 on 1 presale consultation

  • After-Sales Support

    24/7 Technical Support 6 Free Tickets per Quarter Faster Response

  • Alibaba Cloud offers highly flexible support services tailored to meet your exact needs.