Citizen L5 20 replace spindle drive

Good day everyone,
I have to ask you this:

Citizen L5 20 with Mitsubishi CNC (M600 series with Win 95)
Alarm 32 on the spindle drive when the motor decelerate.

I want to replace the drive but they tell me that only Citizen can replace them,
because they have a software different from the standard Mitsubishi.
It is true?

SPINDLE DRIVE UNIT
MDS-B-SPJ2-22
S/W BND527W000A7 H/W VER. E
SERIAL J7AR5G7Z6HN DATE 99/12

The motor parameters are stored in the cnc control or in the drive?

Thanks for your collaboration.
Angelo