基于RS485通讯的数据服务器设计

Design of Field Collection Controller based on RS485

本文主要介绍了数据服务器的硬件系统设计及软件系统设计。本数据服务器是上位机与现场仪表进行数据交换的桥梁 ,上下都采用RS4 85接口。数据服务器通过人为设定的采样周期对现场仪表进行采样 ,读回数据并以一定的格式进行存储。数据服务器根据上位机发来的命令进行相应的操作 ,并返回数据给上位机 ,包括读取当前时间、所连仪表起始地址、单台或全部仪表的当前数据、历史数据。

In this paper,the hardware system and software system of Field Collecti on Controller is introduced. The Field Collection Controller is a bridge between Industry Computer and Intelligent Digital Meters,the interface is RS485.It can collect data from Intelligent Digital Meters by certain cycle,and save these data in certain format.Field Collection Controller can communicate with Industry Computer,can send current time,Intellgent digital Meters' addresses,current data,history data,etc.