同时，由于工业现场对抗电磁干扰和传输距离有比较高的要求，所以本设计采用CAN总线作为各个模块通讯的方式。
At the same time, because of high requirement of anti-electromagnetism interference and long distance this design uses CAN bus as the communication style of every module.
系统压力或差压变送器信号输出采用HART现场总线协议，数字信号传输通过RS485进行MODBUS通讯。
HART field-bus protocol is used in output of system pressure or differential pressure transmitter, digital signals is transmitted with MODBUS via RS485.
现场总线则是衔接智能现场设备和主动化系统地数字式、双向传输、多分支构造地通讯收集，其根底是智能仪表。
Fieldbus intelligent field devices are connected and digital automation system, two-way transmission, multi-branch structure of the communications network, based on smart meters.
使用USB总线传输数据，为数据采集系统与计算机之间的通讯开辟了新的道路。
Using USB bus to transfer data blazed a way in communication between data acquisition system and computer.
概述了该仪表总线的OSI模型及其通讯协议，分析了总线传输机制，介绍了仪表总线的实际应用。 它的应用将简化系统设计、提高性能价格比和运行可靠性。
The OSI model of the M-bus and communication protocol are presented, transmission mechanism is analyzed, and the application in the house-using public business is introduced.
概述了该仪表总线的OSI模型及其通讯协议，分析了总线传输机制，介绍了仪表总线的实际应用。 它的应用将简化系统设计、提高性能价格比和运行可靠性。
The OSI model of the M-bus and communication protocol are presented, transmission mechanism is analyzed, and the application in the house-using public business is introduced.
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