WB系列智能电量传感器可以对各种交、直流电量参数进行实时采集计算、分析,它具有RS485智能端口，可以同PLC、工控机进行通讯，也可以多个WB智能传感器组成RS485网。本文将详细介绍WB智能电量传感器与西门子PLC S7-200 CPU的通讯方法，包括硬件的连接和软件的编程。(For AC. and DC. Parameters , WB Intelligent Sensor can real-time collect , calculate and analyse. WB Intelligent Sendot's RS485 Port is used to communication with PLC and IPC ,and several WB Intelligent Sensors are used in the RS485 network. Now I will introduce the communication between WB Intelligent Sensor and Siemern PLC or S7-200 CPU, and the connection of hardware and design of software about communication.)