Mitsubishi Electric MELSERVO-J3W Series Instruction Manual page 356

14. USING A DIRECT DRIVE MOTOR
2) Initialization of the servo parameter at the startup of direct drive servo
a) Before turning the power of servo amplifier on, write the servo parameter default value, which is
unique to the direct drive servo, to the flash ROM of QD75MH
program example shown in (2) (b) of this section.
b) After completion of writing to the flash ROM, turn the power of servo amplifier on.
POINT
Once the default values are written to the flash ROM at startup, servo parameters
are not required to be written at next power on or later. If the module write with GX
Configurator-QP has been performed using QD75MH , however, initialize the
servo parameters again.
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referring to the sequence