Mitsubishi Electric MELSERVO-J2S Series Transition Handbook page 324

Part 7: Common Reference Material
(6) Execute servo parameter conversion.
Select the target servo amplifier setting and click the [OK] button.
The servo parameters are converted as follows depending on the target servo amplifier setting.
When "SSCNET III / H" is selected, MR-J2S-_B_ is converted to MR-J4-_B_.
When "SSCNET III" is selected, MR-J2S-_B_ is converted to MR-J3-_B_.
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