X2Modbus相当于一座通信桥梁，将其它非标准通信协议网关转化成Modbus标准通讯协议和OPC DA规范，使得支持Modbus协议的上位机软件-X2Modbus equivalent to a communication bridge to other non-standard communication protocol gateway into standard Modbus protocol and OPC DA specification supports Modbus protoc