PROTECTION METHOD FOR SYSTEM DATA IN CONTROL SYSTEM, AND RELATED APPARATUS

The present application discloses a protection method and apparatus for system data in a control system. The method comprises: setting an access permission of a system data area to be a first access permission and an access permission of a user data area to be a second access permission, the first access permission comprising: accessing the system data area, the user data area, an interface data area, and a public data area, and the second access permission comprising: accessing the user data area, the interface data area, and the public data area; in a user mode, before executing a user program, backing up public data and refreshing target system data to the interface data area, and executing the user program on the basis of the interface data area, the target system data, and user data; and after the execution is completed, switching to a system mode, and refreshing current interface data to the system data area and simultaneously recovering the public data. The user program accesses the system data by mean