基于RS-485的税控收款机多机联网设计

The Design of Multi-FCR Network Based on RS-485 Bus

本文简要地介绍了一种基于RS-485总线的税控收款机联网方案,通过一个RS-232/RS-485串口转换器,实现PC机与多台税控收款机之间长距离相互通讯。重点研究了基于RS-485总线的终端设备联网系统的组建、接口电路的优化设计、RS-485串行通信协议的设计和实现。

This article gives brief introduction about the intranet draft for fiscal cash register based on RS - 485 bus, through one serial port convertor of RS - 232/RS - 485, realize the long distance communication between PC and the many fiscal cash registers. It emphasizes the research of the establishment of RS - 485 bus terminal equipment intranet system and the optimum design of interface circuit and the design ＆ realization of RS - 485 Protocols for serial communications.