As an applications engineer, we happen upon these small tidbits of info now and then that can make life easier for some of us and save huge headaches down the line. The below is valid but I would preface this with a stern test,test,test. Backup your parameters in the normal way first before doing this. One reason for doing this besides it simply being invisible is in case your manual backup files get misplaced or corrupted.
I’ve been informed by Fanuc that the i Series of CNCs, (both 0 and 30) can be set to back up its parameters automatically to a CMOS.
Parameter 10340 bits 0,1,and 2 must be a “1” OiD&F and 30 series
Parameter 10341 is the number of days between backups – i.e. 90, 120, 360, 180, etc. OiD&F and 30 series.
Parameter 10342 is the number of backups saved, such as the last 2, etc. This is usually set to a “2”
In response to an excellent question, should you find it necessary to actually retrieve the data saved, it is done by accessing the machine’s boot menu, hold the two right most soft keys while starting the machine.
Going to “SRAM DATA UTILITY” and then “retrieve backup”.
The data is held in inverse order, so file #1 is the most recent, #2 is the second most, etc.. Not valid for OiD&F
Paul