i have a problem with our machine, control :
Mitsubishi Meldas 300 (LATHE)
battery is empty , and i need to exchange the battery, (how, and how many batteries ??)
i need to know the procedure of reload the PLC and NC parameters to run the machine again. is it able to reloaded from itself or i have to enter it manually from the screen
i have no operating manuals , no alarm list, no parameters. also appears the following alarms

Z07 CRC ERROR 00F0
502 INIT PARAM ERR-9
405 INIT PARAM ERR-2
EMG STOP B020

((( MITSUBISHI NUMERICAL CONTROL SYSTEM MODEL: FCA C3-S)))

any help would be much appreciated