AC800M controllers need periodic application backups or not ?
I have 2 controllers in my plant , one as DCS and the other as ESD/SIS system , one PM861 and the other PM865 , from my experience in CBM , the modifications done on the offline application and then uploaded to the controller , wo I thingk the pplication will exist all the day , so can I take a copy from that application and restore it in case of lost , or how the application backup will be managed in AC800M controllers
There is no direct backup from Controller. You have to take afw import /export backup of control structure manullay where your application and object resides.
Any program lost in the controller, you can load it manullay from control builder.
Another option same program, you can manually load with External memory card and insert inside controller. whenever program is lost , it will be loaded automatically from the memory card
Apart from manual export of applications, you can also trust the System 800xA Full Backup to perform an automated and total backup of all applications. Full Backups can be scheduled with the scheduler in System 800xA.
The benefit of manual export is that you easily can perform manual import of a singular application.
The Full Backup can only be created & restored as a whole.
If you need to perform a partial restore from a full backup I suggest cloning* one of your aspect servers into a virtualized machine, perform a (full) restore there, then perform manual export of the lost application(s) which you then finally can load back into your production system.
*) The VMware Standalone Runtime Converter and VMware Player are freeware. Other options may exist as well (ESXi, Hyper-V, etc).