Mitsubishi FX3U-20SSC-H Quick Start Manual page 17

Servo /// Motion ///
2) Using GX Developer, write the servo parameters to the F3U-20SSC-H Flash ROM.
Open GX Developer and create a new FX3U project. To access the BFM, open the
Buffer memory batch window by going to [Online → Monitor → Buffer memory
batch].
Access BFM #522 by inputting '0' for the 'Module start address' and '522' for the
'Buffer memory address' as shown below. Note, the 'Module start address' is
different if you have other hardware connected to the FX3U.
1) Module start address: 0
2) Buffer memory address: 522
3) Click on the 'Start monitor' button.
4) Click on the 'Device test' button.
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Servo /// Motion /// Servo /// Motion /// Servo /// Motion /// Servo