Mitsubishi Electric MELSERVO-J2S Series Transition Handbook page 22

Part 1: Summary of MR-J2S/MR-J2M Replacement
Changes from MR-J2S series to MR-J4 series
Changes Check items
Servo Connector
amplifier
Terminal block
P3, P4 terminals
Z-phase
Parameter
Dimensions
Interface 24 V DC
power supply
Dynamic brake
coasting distance
Communication
function
Forced stop
deceleration
Initializing time
LED display
Built-in regenerative
resistor
Options and Molded-case circuit
peripheral breaker fuse
equipment
Magnetic contactor
Power factor improving
AC reactor
Power factor improving
DC reactor
POINT
The following table summarizes the changes from MR-J2S series to MR-J4
series.
For details, refer to the reference document/items.
Connector shape, pin arrangement, signal abbreviation, and
location are different.
Terminal block shape, location, and method of drawing out
wires are different.
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.
Pulse width and start-up timing of the encoder Z phase pulse
signal (OP) output from the servo amplifier are different.
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.
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.)
For MR-J4, an external 24 V DC power supply is required for
the interface.
The servo motor has a different dynamic brake coasting
distance.
MR-J4 has no RS-232C. MR-J4 has the following
communication functions.
MR-J4-_A_: USB, RS-422
MR-J4-_B_: USB
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.
The time it takes to reach servo-on from power-on is different.
MR-J2S-_B_ has a 7-segment 2-digit LED display and MR-
J4-_B_ has a 7-segment 3-digit display.
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.
Those for MR-J2S may not be usable. Select those for MR-
J4.
Those for MR-J2S may not be usable. Select those for MR-
J4.
Those for MR-J2S may not be usable. FR-HAL is
recommended.
Those for MR-J2S may not be usable. FR-HEL is
recommended.
Impact
1 - 5
Reference document/items
Part 2, Section 3.4
Part 3, Section 3.5
Part 6, Section 3.3
Part 7, Section 1.2.2
Part 7, Section 1.2.1
Part 7, Section 1.2.1
Part 7, Section 1.2.9
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
Part 7, Chapter 2
Part 7, Section 1.2.5
Part 7, Section 1.2.3
Part 7, Section 1.2.7
Part 7, Section 1.2.4
MR-J4-_A_Servo Amplifier
Instruction Manual
MR-J4-_B_Servo Amplifier
Instruction Manual
Part 7, Section 1.2.8
MR-J4-_B_Servo Amplifier
Instruction Manual
Part 9, Section 1.1
Part 9, Section 4.3
Part 9, Section 4.3
Part 9, Section 7.1
Part 9, Section 7.3
Part 9, Section 7.6
Part 9, Section 7.8
Part 9, Section 7.2
Part 9, Section 7.4
Part 9, Section 7.5
Part 9, Section 7.7