本规范定义串行现场总线的技术和功能特性。 串行现场总线主要用来连接数字现场设备

或中、低功能的系统，如传感器、执行机构、变送器、可编程序控制器（PLC） 、数控装置

（NC） 、编程设备、本地人机接口等。-This specification defines a serial field bus technology and features. Serial field bus is mainly used to connect digital field devices or medium, and low functionality systems, such as sensors, actuators, transmitters, programmable logic controller (PLC), numerical control device (NC), programming equipment, local machine interfaces.