一种新颖的仪表总线从机通信方案  

A Novel M-Bus Slave Communication Scheme

作　　者：陈富光 谭龙 汪芳君 封小刚 毛德兴 CHEN Fuguang;TAN Long;WANG Fangjun;FENG Xiaogang;MAO Dexing(Ningbo Water Meter(Group)Co.,Ltd.,Ningbo 315032,China)

机构地区：[1]宁波水表(集团)股份有限公司,浙江宁波315032

出　　处：《仪表技术》2022年第4期26-29,36,共5页Instrumentation Technology

摘　　要：仪表总线(M-Bus)是一种新型的总线结构,它采用两条无极性的传输线为从机设备提供电源,同时为主从设备传递通信信号。由于M-Bus结构简单,造价便宜,安全可靠,利用M-Bus主站对各类智能化仪表进行总线制控制和管理,成为当前智慧城市建设的首选方案。根据M-Bus的电气标准,仪表总线电压的同一逻辑电平存在一个较宽范围的浮动,并且主机的通信方式也会经常变化。详细分析了从机M-Bus的设计标准,并从硬件原理及软件方案上实现了一种低成本的新型的从机通信方案,既能匹配电气标准中的电压范围,又能自动识别主机通信方式,满足了传统生产行业的要求。最后还列出了设备的通信监控数据,验证了从机设备的可靠性。Meter Bus(M-Bus) is a new type of bus structure.Two non-polar lines are used to provide power for the slave equipments and transmit information between the master and slave devices.M-Bus is simple,cheap and reliable,so applying M-Bus master station to control and manage all kinds of intelligent instruments has become the first choice for the construction of smart city.According to the electrical standard of M-Bus,the same logic level of M-Bus voltage fluctuates in a wide range,and the communication mode of the host often changes.This paper analyzes the design standard of slave M-Bus in detail,and realizes a cheap and novel slave communication scheme including the hardware and software,which can not only match the voltage range in the electrical standard,but also automatically identify the host communication mode.Finally,the communication monitoring data of the device is listed to verify the reliability of the slave device.

关 键 词：仪表总线 自适应 模拟电路 

分 类 号：TP274[自动化与计算机技术—检测技术与自动化装置]