From Start menu of Windows >, click [All Programs] > – [MELSOFT Application] > – [MR Configurator2] > and you can find “MR-J4(W)-B mode selection” under MR Configurator2.
When you use MR-J4(W)-B servo amplifier operated in MR-J3-B compatibility mode with SSCNETIII/H compatible controller, you have to change it to J4 mode using MR-J4(W)-B mode selection application.