Mitsubishi Electric MELSERVO-J2-Super Series, Transition Handbook

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Part 1: Summary of MR-J2S/MR-J2M Replacement
1 - 5
Changes from MR-J2S series to MR-J4 series
POINT
The following table summarizes the changes from MR-J2S series to MR-J4
series.
For details, refer to the reference document/items.
Changes Check items Impact Reference document/items
Servo
amplifier Connector Connector shape, pin arrangement, signal abbreviation, and
location are different. Part 2, Section 3.4
Part 3, Section 3.5
Part 6, Section 3.3
Part 7, Section 1.2.2
Terminal block Terminal block shape, location, and method of drawing out
wires are different. Part 7, Section 1.2.1
P3, P4 terminals MR-J4 servo amplifier has P3 and P4 in the upstream of the
inrush current suppression circuit. Note that the locations of
the P1 and P terminals of MR-J2S-11K_ to MR-J2S-22K_ are
different. Part 7, Section 1.2.1
Z-phase Pulse width and start-up timing of the encoder Z phase pulse
signal (OP) output from the servo amplifier are different. Part 7, Section 1.2.9
Parameter
Parameter numbers and contents are different. In addition,
using the parameter converter function of MR Configurator2,
GX Works2, and MT Developer2, it is possible to transfer the
setup contents of the MR-J2S parameters to MR-J4.
Part 2, Section 3.6
Part 3, Section 3.7
Part 4, Section 3.6
Part 5, Chapter 3
Part 6, Section 3.5
Part 7, Section 2.3
Dimensions The height and width of the MR-J4 is equal to or less than that
of the MR-J2S series. Check regarding room for wiring. (Note
that the depth is larger for 400/600 W.) Part 7, Chapter 2
Interface 24 V DC
power supply For MR-J4, an external 24 V DC power supply is required for
the interface. Part 7, Section 1.2.5
Dynamic brake
coasting distance The servo motor has a different dynamic brake coasting
distance. Part 7, Section 1.2.3
Communication
function MR-J4 has no RS-232C. MR-J4 has the following
communication functions.
MR-J4-_A_: USB, RS-422
MR-J4-_B_: USB Part 7, Section 1.2.7
Forced stop
deceleration When MR-J4 is forcibly stopped in a factory setting and when
an alarm occurs, the servo motor decelerates and stops. The
way the servo motor stops is different from when the MR-J2S
emergency stop or forced stop is effective. Part 7, Section 1.2.4
MR-J4-_A_Servo Amplifier
Instruction Manual
MR-J4-_B_Servo Amplifier
Instruction Manual
Initializing time The time it takes to reach servo-on from power-on is different. Part 7, Section 1.2.8
LED display MR-J2S-_B_ has a 7-segment 2-digit LED display and MR-
J4-_B_ has a 7-segment 3-digit display. MR-J4-_B_Servo Amplifier
Instruction Manual
Built-in regenerative
resistor Note that replacing MR-J2S-60_4 and MR-J2S-100_4 with
MR-J4-60_4 and MR-J4-100_4 respectively changes the
regenerative ability. Part 9, Section 1.1
Options and
peripheral
equipment Molded-case circuit
breaker fuse Those for MR-J2S may not be usable. Select those for MR-
J4. Part 9, Section 4.3
Magnetic contactor Those for MR-J2S may not be usable. Select those for MR-
J4. Part 9, Section 4.3
Power factor improving
AC reactor Those for MR-J2S may not be usable. FR-HAL is
recommended.
Part 9, Section 7.1
Part 9, Section 7.3
Part 9, Section 7.6
Part 9, Section 7.8
Power factor improving
DC reactor Those for MR-J2S may not be usable. FR-HEL is
recommended. Part 9, Section 7.2
Part 9, Section 7.4
Part 9, Section 7.5
Part 9, Section 7.7