Mitsubishi Electric MELSERVO-J4 Series Transition Handbook page 431

Part 7: Common Reference Material
(3) Read the servo parameters.
Click [Parameters] in the menu to display the parameter list screen.
Connect the MR- J3-_A_/MR-J3-_T_ servo amplifier to a personal computer and click the [Read] button.
The following figure shows an example of when "MR-J3-A" is selected for Model.
After reading the parameters is completed, select [Save As] to save the parameter file.
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