本文主要阐述了利用C8051F系列单片机和计算机组成RS-485通信系统，实现对远程供电设备电流、电压、频率、温度进行采样，将结果通过RS485总线发送到计算机并在界面上显示的设计与实现。在介绍分布式供电设备的基本概念和RS485等远程通讯协议的基础上，结合硬件电路，设计和编写下位机软件，实现分布式供电设备的信号采集、数据远程传送和控制命令的接收等功能。同时采用Visual C++ 6.0开发出基于WINDOWS的上位机监控界面，对下位机发送的数据进行处理，完成与下位机的通讯功能并对数据库进行管理。该界面具有良好的人机交互功能，数据越限时能够自动报警。本文还详细给出了利用Visual C++ 6.0读写串口的函数实现、制作界面的具体步骤以及数据存入数据库的具体过程。
关键词： 单片机 串口通信 RS485总线
Remote Monitoring System of Distributed Power Supply
Equipment (Part of Software)
ABSTRACT
This article describes the use of C8051F MCU and computer components RS-485 communication systems mainly, and has achieved current, voltage, frequency, temperature sampling in the long-range power supply equipment, then the results are sent to the computer interface displayed on the Design and implementation through the RS485 bus. On the basis of the basic concept of distributed power supply equipment and the long-distance communications of RS485 and so on, combining hardware, has designed and compile the next-bit software, and has achieved functions of long-distance data transmission,the distributed power supply equipment’s signal acquisition, reception of control orders and so on. At the same time using Visual C + + 6.0 WINDOWS developed based on the PC monitor interface, the data that the crew sent to is took order with, and completes communication with the next crew and database management. The interface has a good interactive features, and the data can be time-limited automatic alarm. This paper also gives Concrete steps of the use of Visual C + + 6.0 to read and write serial port to achieve a function and the production interface, along with the specific process of data in the database.
