FlexPendant Operators Manual 3HAC16590 ... - Technology

10 Systems10.4.4. Important when performing backups!10.4.4. Important when performing backups!GeneralWhen performing backups or restoring previously made backups, there are several things tokeep in mind. Some of these are listed below.BACKUP directoryA local default backup directory, BACKUP, is automatically created by the system. Werecommend using this directory for saving backups! Such backups are not copied to thedirectory HOME in following backups.Never change the name of the BACKUP directory.Also, never change the name of the actual backup to BACKUP, since this would causeinterference with this directory.When is backup possible?A backup of a system may be performed during program execution. When doing so, a fewlimitations apply:• Start program, load program, load module, close program and erase module can notbe done during backup in executing state. The RAPID instructions Load andStartLoad can, however, be used.What happens during backup?Beside the obvious, a backup being made, a few thing happen during backup:• Background tasks continue to execute during a backup.Duplicated modules?No save operation is performed in the backup command. This implies that two revisions ofthe same modules can exist in the backup, one from the program memory saved inRapid\Task\Progmod\ directory and one from the HOME directory copied to the Backup’sHome directory.Large data amountToo many files in the HOME directory can result in a very large backup directory. Theunnecessary files in the Home directory can then be deleted without any problems.Fault during backupIf a fault occurs during the backup, e.g. full disk or power failure, the whole backup structureis deleted.3HAC 16590-1 Revision: B269