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--- en:lib:mdl:mdl-f-fsbacres-010 [2015/10/20 09:11] – qem207
+++ en:lib:mdl:mdl-f-fsbacres-010 [2019/08/29 17:01] (current) – external edit 127.0.0.1
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+==== Note to system functions Backup and Restore ====
+The use of system functions  [[#Backup to NAND]] and [[#Restore from NAND]] allows to save in backup and restore a QMOVE application.
+The backup and restore operations use the NAND internal memory device.
+The backup procedure creates a file copy of the QCL program, the HMI program (if the controller has a Qem display) and an image of the ritentive data.
+The files created:
+  * **applic.qcy** containing the QCL program (QCL App)
+  * **appdat.qcy** containing the ritentive data image (QCL Dat)
+  * **appqtp.qcy** containing the HMI program (QTP App)
+The files are encrypted and only the controller that generated them can run the Restore procedure so as to safeguard unauthorised data copies.
+The backup file copied to external memory such as MMC/SD or USB card can be carried out with the system function [[#Copy all NAND files -> DEVICE]]. A directory named "**QBK**" is created in the MMC/SD or USB that contains the above files.
+In the same way backup files can be transferred to the controller using the system function  [[#Copy all files DEVICE -> NAND]]. In this case, the files in the MMC/SD or USB must always be contained in the directory "**QBK**".
+Backup/restore is an important function that can be used in the following cases:
+  - to restore the QMOVE application to a known situation (the situation at the time of the backup), if data has been changed by an operator or if the machine data has been altered for any reason.
+  - when testing a new application, a backup can be made of the original, stable version. If the new application being tested is not satisfactory, the restore command will recover the original version.