本文設計了一種基于RS485 串行總線的集散式測控系統(tǒng)。本系統(tǒng)主要由以下幾個控
制器部分組成：上位機、數(shù)據(jù)采集模塊、繼電器陣列模塊。RS-485 作為一種硬件設計簡單、控制方便、成本低廉的通信方式，實現(xiàn)了這些模塊的統(tǒng)一協(xié)調通信，實現(xiàn)一主(PC 機)多從(多個PIC16F877 子系統(tǒng))的集散式測控系統(tǒng)。
關鍵字：測控系統(tǒng)；RS-485；串行線路網(wǎng)際協(xié)議

Abstract: A new distributed control system based on RS485 serial data bus is designed in
this paper. It is consist of several parts as following: Computer, data sampling module, and
recharge machine array module. As a simple designing, convenient controlling, and low
cost communication method, RS485 implements the communication between these
modules. Finally, the distributed control system with one PC and several PIC16F877
systems is implemented.
Keywords: Measuring and Controlling System; RS-485; SLIP