103IEC标准，主要用于电力系统通讯，为后台计算机通讯所用。-103IEC standards, mainly used in power system communication, computer communication used for the background.

101 IEC标准通信协议，主要用于电力系统主站和设备之间的通讯-101 IEC standard communication protocol, mainly used in power system master station and the communication between devices