Part 1: Summary of MR-J3/MR-J3W Replacement
1 - 5
3.1.3 Changes from MR-J3 series to MR-J4 series
POINT
The following table summarizes the changes from MR-J3 series to MR-J4 series.
For details, refer to the reference document/items.
For large capacity models of 30 kW or more, Refer to "Part 5: Review on
Replacement of MR-J3-DU_ with MR-J4-DU_"
Changes Check
items
Impact
Reference
document/items
Servo
amplifier
Connector
Connector shape, pin arrangement, signal abbreviation,
and location are different.
Part 2, Section 3.3
Part 3, Section 3.4
Part 6, Section 1.2.2
Terminal block
Terminal block shape, location, and method of drawing out
wires are different.
Part 6, 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-J3-11K_ to MR-
J3-22K_ are different.
Part 6, Section 1.2.1
Z-phase
There is no difference caused by the replacement from the
MR-J3 servo amplifier to the MR-J4 servo amplifier.
Part 6, Section 1.2.7
Parameter
General-purpose interface is upward compatible, but the
parameter needs to be changed. The parameter converter
function of MR Configurator2 can transfer the parameter
setting for MR-J3 to the setting for MR-J4. For SSCNET III
interface, the MR-J3 compatibility mode is available with the
MR-J4 series and the parameter does not need to be
changed.
Part 2, Section 3.5
Part 3, Section 3.6
Part 6, Section 2.2
Part 6, Section 2.3
Dimensions
MR-J3 and MR-J4 have compatibility in mounting.
Note that the positions (clearances) of mounting screws for
the 5 kW (200 V), 3.5 kW (400 V), 11 kW, and 15 kW have
been changed to reduce the size of external dimensions.
Part 6, Section 2.1.1
Part 6, Section 2.1.2
Dynamic brake coasting
distance
The servo motor has a different dynamic brake coasting
distance.
Part 6, Section 1.2.3
Forced stop deceleration
For MR-J4, in the shipping status, the servo motor
decelerates to stop during a forced stop or when an alarm
has occurred. The stop method for MR-J4 is different from
the method of when an emergency stop or a forced stop of
MR-J3 is enabled.
Part 6, 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 6, Section 1.2.6
Options and
peripheral
equipment
Molded-case circuit breaker
Fuse
Those for MR-J3 may not be usable. Select those for MR-
J4.
Part 8, Section 4.3
Magnetic contactor
Those for MR-J3 may not be usable. Select those for MR-
J4.
Part 8, Section 4.3
Power factor improving AC
reactor
Those for MR-J3 may not be usable. FR-HAL is
recommended.
Part 8, Section 7.2
Part 8, Section 7.5
Part 8, Section 7.6
Power factor improving DC
reactor
Those for MR-J3 may not be usable. FR-HEL is
recommended.
Part 8, Section 7.1
Part 8, Section 7.3
Part 8, Section 7.4
Regenerative option
Some regenerative options cannot be used for MR-J4.
Part 8, Chapter 1
Setup software (SETUP221E)
Setup software (SETUP221E) cannot be used for MR-J4.
Use MR Configurator2.
"MR Configurator2" can also be used for MR-J4 series and
MR-J3 series.
Part 8, Chapter 8
Battery
Use MR-BAT6V1SET for MR-J4.
Part 8, Chapter 5
Encoder cable
When more than 15 kW of HG-JR 1000 r/min series or
more than 22 kW of HG-JR 1500 r/min series is used,
setting changes are required for the following encoder
cables.
MR-ENECBL _ M-H-MTH
Part 6, Section 1.2.2
Part 8, Chapter 3
Summary of Contents for Melservo MR-J3-100B
Page 17: ...8 MEMO ...
Page 18: ...Part 1 Summary of MR J3 MR J3W Replacement 1 1 Part 1 Summary of MR J3 MR J3W Replacement ...
Page 145: ...Part 3 Review on Replacement of MR J3 _B_ with MR J4 _B_ 3 48 MEMO ...
Page 195: ...Part 4 Replacement of MR J3W _B with MR J4W2 _B 4 50 MEMO ...
Page 277: ...Part 5 Review on Replacement of MR J3 DU_ with MR J4 DU_ 5 82 MEMO ...
Page 278: ...Part 6 Common Reference Material 6 1 Part 6 Common Reference Material ...
Page 418: ...Part 7 Review on Replacement of Motor 7 1 Part 7 Review on Replacement of Motor ...
Page 564: ...Part 9 Startup Procedure Manual 9 1 Part 9 Startup Procedure Manual ...
Page 567: ...Part 9 Startup Procedure Manual 9 4 MEMO ...
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