Download control. 0:Invalidity 1:Download start 2:Download suspend 3:Upload start 4:Upload end 5:Download reset *'0:Invalidity' is used as an initial state. *'5:Download reset' terminates the FTP server(vsftpd) with the deletion processing in the type of the file for all download directory. *The object file name allows only alphanumeric character '0-9', 'a-z', 'A-Z' of ASCII code, and sign '-_.+'. *Pertinent details: ipeSysOpFileDownloadProtocolType *Pertinent details: ipeSysOpFileDownloadModule *Pertinent details: ipeSysOpFileDownloadStatus *Pertinent details: ipeFsUpdateFileStatus *Pertinent details: ipeFsUsbProcStatus [Race condition] *When ipeSysOpFileDownloadStatus is (3:Executing) or (4:Suspending), (1:Download start) is invalid. *When ipeSysOpFileDownloadStatus is (4:Suspending), (2:Download suspend) is invalid. *When ipeSysOpFileDownloadStatus is (0:Invalidity), (1:Download start) is valid, but do nothing. *When ipeFsUpdateFileStatusis(3:Executing), it is invalid. Other one is valid. *When ipeFsUsbProcStatus is (2:Normal:Process executing), it is invalid. Other one is valid. [Indispensable condition] *When it is (1:Download start) or (3:Upload start), (4:Upload end),ipeSysOpFileDownloadProtocolType setup is indispensable.