nulizhang

You have 840D --what exactly?  840D powerline or 840D Solution line. need picture the NCU system and drive I will know. for Back up, you did NCK, PLC, MMC and Drive archive , that is already good enough.

only risk is if you MMC103  (or PCU50) HDD failed, then all your back up will be useless.

the better way is take out the HDD from MMC, using adaptor interface connecting to normal PC, making HDD image by ghost or other tools, save image on PC HDD or making a CD rom.

PS: further more, after making image find a same size HDD with PCU you using, restore image to it and try to run PCU with this new HDD, and put it in the safety place--that will 100% save your down time--Which  is I did in my company shop for our 840D PL m/c.---services companies may hate me, if all customers doing like this they will loss some business :-)

Sir, I am new to siemens sinumerik controller field. I don't know what is ghost back. Or what is the difference between normal backup and ghost back up. And how to do normal backup and ghost backup , can any one explain it.

                               Thankyou

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Split from 840D System Backup.