VB Modbus的例子

实现MODEN的串口通信，VC编程比较经典。有一定的实用性，值得大家参考-achieve modem serial communications, more classic VC. A certain degree of practicality, it is worth your consideration

Visual Basic串口通讯调试方法。一个非常简单的方法.-Visual Basic serial communications debugging method. A very simple method.

使用vb编程RS232输出 comboDevice.AddItem "COM1" comboDevice.AddItem "COM2" comboDevice.AddItem "COM3" comboDevice.AddItem "COM4" comboDevice.AddItem "COM5" comboDevice.AddItem "COM6" comboDevice.AddItem "COM7" comboDevice.AddItem "COM8"-use vb programming RS232 output comboDevice.AddItem "COM a "comboDevice.AddItem" COM2 "comboDevice.A ddItem "COM3" comboDevice.AddItem "COM4" com boDevice.AddItem "COM5" comboDevice.AddIte m "COM6" comboDevice.AddItem "COM7" comboDev ice.AddItem "COM8"

本串行通信程序利用汇编语言通过BIOS中断调用和DOS功能调用实现PC机双机串行通信。其中，上位机和下位机串行口均为辅串口COM2（口地址为2FXH），对外用9针连接器与令一台PC机连接；BIOS通过“INT 14H”4个中断服务子程序，分别完成串口初始化编程、发送一帧数据、接受一帧数据以及测试通信线状态。本程序分为PC机串口自动测试程序（目的是测试串口好坏）和PC机全双工双机通信程序两个部分。-the serial communications procedures through the use of assembly language BIOS interrupt calls and function calls DOS PC Dual Serial Communication. Among them, PC and the next crew will be supplemented by serial port Serial COM2 (I address 2FXH) external with 9-pin connectors and enable a PC connection; through the BIOS "INT 14H," four interrupt service routines, complete serial port initialization programming, Send a data receiving a data communications test and the state line. The procedures are divided into PC serial automatic test procedure (for the purpose of testing Serial good or bad) and full-duplex PC-machine communication program two parts.

VC类,标准串口类,无消息类型,用于工业控制中-VC-type, standard serial-type, non-news type, used for industrial control

C51下的 485通讯程序. 包括 主机 和从机的程序. 测试通过了的-C51 under the 485 communications procedures. Including mainframe and from the plane procedures. Pass the test

用串口通信的方式实现双机备份，串口采用了 mscomm控件。-serial communication with the realization of a two-aircraft backup, serial used mscomm controls.

介绍利用VB6串行通信编程的方法，对采用了RS-232接口的仪器进行串行通信的计算机测控软件开发，以及实现仪器功能和指标的验收。-Introduce the use of VB6 programming serial communication method, using the RS-232 interface for serial communication equipment computer monitoring and control software development, as well as functional instruments and indicators to achieve acceptance.

260 ad采样-260 sampling ad

使用标准控件 Microsoft Communications Contro 进行串口设置，串口读写，读写输入输出缓存。-using standard controls for Microsoft Serial Communications Contro set, serial literacy, reading and writing input and output buffers.