u/MarcosViudes

I’m trying to recover a FANUC 0T control on a Schaublin 125 lathe that lost its parameters after a battery failure.

The initial issue was:

• Error 911 (RAM parity high)
• Then 910 (RAM parity low)

The battery was completely dead and the control appears to have lost all data. I have installed new batteries.

Now there are no alarms, but the control is stuck in a NOT READY state:

• Cannot change screens
• Cannot load backup via RS232
• No response from the control

Power supply seems OK and boards are properly seated.
The axis/drives display just shows two dashes (“--”), like the system never fully initializes.

This does not look like an E-stop condition.

Questions:

• Could this be caused by completely missing parameters and/or PMC data?
• Is it possible that the system software is also missing or not initializing?
• Is there any way to force the control into a parameter/system load mode without access to the menus?

I do have a backup of the parameters, but I can’t get the machine into a state where it accepts them.

Any help would be greatly appreciated