Hitachi Seiki HT20-300 restore parameters

I have trouble with lathe Hitachi Seiki HT20-300 (1986year) with FANUC 10t. The NC battery was disconnected while machine power was off. So all NC data was lost and now restore NC data (SRAM, NC parameters, programs and etc) is reqired. I need to get backup data for this control.
Does anybody have backup data for this FANUC control?
Any help greatly appreciated.