多微机联控系统中通信方式的选择与应用

多微机联控系统应用不同类型的单片机，构成一个主控制器和多个现场控制器，充分发挥不同类型单片机的长处以提高系统的实用性和性价比。主控制器和多个现场控制器之间采用异步串口通信或“软串口”按照“通信协议”实现分支通信，组成多微机联控的“集散式控制”系统。这种多微机联控系统极大地简化了控制电路的连线，简化了电气控制安装工艺与施工，在降低工程费用和后期维修费用的同时，可大幅提高控制系统工程的可靠性、稳定性、性价比。本文重点研究在三种不同的多微机联控应用环境中。串口通信的工作方式、通信的实用性与设计方案的选择。

Multi-computer control system in conjunction with different types of single-chip, which constitute a main controller and multiple-site controller, and give full play to the strengths of different types of single-chip microcomputer system in order to enhance the practicality and cost-effective. Host controller and multiple-site controller using asynchronous serial communication,or ＂soft-serial＂ in accordance with the ＂communication protocols＂ to achieve branch communications, computer controlled multi-component of ＂Distributed Control＂ system, according to three Flop flip side of the control sub-drive motor, to achieve large-scale three sides of the sign face will be over the screen, time, optional flip way, the sign face of an error ＂automatic error correction flip＂ and drive the requirements. Multi-microcomputer controlled system greatly simplifies the control circuit connection, simplifying the installation of electric control technology and construction, reducing construction costs and maintenance costs while the latter can be a substantial increase in the reliability of control systems engineering, stability, letter price value