【摘要】 介绍了利用RS485总线为大型粮食仓库构建的主从式网络监控系统结构,及相关的软硬件设计。制订了上位机PC与下位机单片机之间的通信协议,从而使上位机能够发送命令至下位机并自动采集下位机数据,并且利用了ADO访问了Ac-cess数据库,实现了对采集来的数据进行存储、查询、打印等。更多还原

【Abstract】 The monitor system of master/slave communication network based on RS485 and its hardware and software design has is introduced.The protocol of communication between PC and MCU is made.The order can be send and data can also be collected automatically.Those collected datum are stored,inquired and printed by Access database and ADO.更多还原