How To Switch J4 Mode/J3 Compatibility Mode - Mitsubishi Electric MELSERVO-J4 series Instruction Manual

17. APPLICATION OF FUNCTIONS

17.1.4 How to switch J4 mode/J3 compatibility mode

There are two ways to switch the J4 mode/J3 compatibility mode with the MR-J4W_-_B servo amplifier and
MR-J4-_B_(-RJ) servo amplifier.
(1) Mode selection by the automatic identification of the servo amplifier
J4 mode/J3 compatibility mode is identified automatically depending on the connected controller.
When the controller make a connection request with SSCNET III/H communication, the mode will be "J4
mode". For SSCNET communication, it will be "J3 compatibility mode".
For the J3 compatibility mode, standard control, linear servo motor control, or direct drive motor control
will be identified automatically with a motor (encoder) connected to the servo amplifier. For the J4 mode,
the operation mode will be the setting of [Pr. PA01].
Factory setting
J4 mode/J3 compatibility
mode automatic
identification
J4 mode
Controller
connection check
J3 compatibility
17 - 5
[Pr. PA01] setting
Connected encoder
check (automatic
mode
identification)
Standard control
(rotary servo motor)
Fully closed
loop control
Linear servo motor
control
Direct drive motor
control
Standard control
(rotary servo motor)
Fully closed
loop control
Linear servo motor
control
Direct drive motor
control