IO mapping method and system for realizing software and hardware separation in programmable controller

The invention provides an IO mapping method and system for realizing software and hardware separation in a programmable controller. The IO mapping method comprises the following steps: S1, setting software programming to not support a hardware address and support all-symbol programming; s2, a hardware address is allocated during hardware configuration, and a system identifies and accesses a hardware IO; and S3, before executing the user program task, converting the IO mapping table compiled by the user into an output for refreshing the IO system and an input for reading in the IO system to an associated symbol variable address. According to the programmable controller, an IO mapping method with software and hardware separated is adopted, and the problems of transplantation, integration and testing of PLC control software, online processing of abnormal equipment and the like are solved; and user experience is improved. 本发明提供了一种在可编程控制器中实现软硬件分离的IO映射方法及系统，包括：步骤S1：将软件编程设置为不支持硬件地址，支持全符号编程；步骤S2：令硬件配置时分配硬件地址，系统识别和访问硬