规定了8串保护板对外接设备 (UPS、逆变器或其他设备)的通信协议；
通信链路为RS485，基于Modbus RTU协议。其中外接设备为主机，8串保护板作为从机(地址固定为1)(A communication protocol for 8 series of protective panels (UPS, inverter or other equipment) is provided.
The communication link is RS485, based on the Modbus RTU protocol. The external equipment is the host, and the 8 string protection plate is used as the slave (fixed to 1).)