用串行通讯构成工业控制小型集散系统

DCS for Industry Controlling Based on the Serial Communication

以串行通讯为基础 ,由一台 PC机和几台 Intel 51单片机构成的小型集散控制系统 ,使用自定义的简单通讯协议 .上位机分时、循环向各下位机发送信息 ,被点名的下位机在规定时间内作出应答 .传送的信息中 ,每一字节都包含地址信息 .

Using the serial communication we have constructed a DCS with a PC and a sets of Intel 51 single chip computer. The communication agreement in which is defined by ourselves.That is: upper computer send messages to lower computers in turn; named lower computer must replay in time; in sending messages, every byte contains the address.