Mazak RPM Spindle readings

Hello;

I have a Mazak VQC 15/40 M32 sat for some time until we got Battery Alarm.
So I Turned on the machine for some hours to charge battery and found alarm # 37 on the Mitsubishi spindle drive display. (Parameter out of range).
So I found that parameters #21-21-23 and 24 was only with dots, so I charged the values acording the Mitsubishi Freqrol Manual setting.
Now my machine turns on without any alarms, but when I put the spindle to spin to 1000 RPM, I read 1000 on the spindle drive,and 1000 in the monitor....but 750 in the front panel display.
Do you know how to adjust or wich parameter need to change to get 1000 in the front panel display?
Thank you.