Mitsubishi Electric MELSERVO-J2S Series Transition Handbook page 505

[Appendix 1] Summary of MR-J4_B_-RJ020 + MR-J4-T20
12.2 Mode Switching Method from J4 Mode to J2S Compatibility Mode
(1) Turn on the servo amplifier with MR-J4-T20 mounted.
(2) Run the application of "MR-J4(W)-B Change mode" or "MR Mode Change" and verify that "J2S
Compatibility mode" is displayed in "Compatibility Mode". If not, try again from (1) of this section.
(3) Select "Switch mode" and then choose "J2S compatibility mode". Only standard control mode can be
selected for the operation mode.
(4) Click the "Write" button.
(5) By cycling the power supply of the servo amplifier, the mode will switch to J2S compatibility mode.
POINT
For the details of the parameters, refer to "MR-J4-_B_-RJ020 Servo Amplifier
Instruction Manual (SH(NA)030125)".
Appendix 1-42