本文设计了一种基于RS485 串行总线的集散式测控系统。本系统主要由以下几个控制器部分组成:上位机、数据采集模块、继电器阵列模块。RS-485 作为一种硬件设计简单、控制方便、成本低廉的通信方式,实现了这些模块的统一协调通信,实现一主(PC 机)多从(多个PIC16F877 子系统)的集散式测控系统。关键字:测控系统;RS-485;串行线路网际协议Abstract: A new distributed control system based on RS485 serial data bus is designed inthis paper. It is consist of several parts as following: Computer, data sampling module, andrecharge machine array module. As a simple designing, convenient controlling, and lowcost communication method, RS485 implements the communication between thesemodules. Finally, the distributed control system with one PC and several PIC16F877systems is implemented.Keywords: Measuring and Controlling System; RS-485; SLIP
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