I work with crane gantries as an electrical technician and meet ;one is of this kind;The system uses fuji drives and the plc programme used to run it is on Micrex F and the plc is fuji F70 S.I do believe that when the plc power goes off the running programme on RAM can be lost but at the same time I do believe it has an Eprom which has its programme.How do i retrieve this and move it to the Ram instead of always copying a programme from other gantries then reinstalling it.This happens on only particular cranes whos retentive batteries I believe are poor.Atthe same time when I make a rectification on the programme whats the procedure used to make sure the changes go to the Eprom pls advice.