Specifications

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MITSUBISHI ELECTRIC
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SYSTEM DESCRIPTIONS
MELSERVO MR-J3 Servo Amplifiers
MELSERVO
The MR-J3 ser vo d r ive systems from
Mitsubishi Electric combine ex t remely
dynamic response with ultra-fast position
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ing. In addition the servo amplifiers are
also very simple to use, and their advanced
functionality make it possible to achieve
maximum performance very quickly,
even for users without special experience
in calibrating drive applications. The sig-
nificantly improved auto-tuning function
reduces the need for the time-consuming
trial-and-error approach. In combination
with the setup sof tware package
(MR-Configurator) the MR-J3 series can be
used to detect application mechanical crit-
ical frequencies. This enables notch filters
to be set to avoid resonant frequencies
enabling vibration- free operation.
When using amplifiers of competitors the
controller response level has to be
reduced for the entire operation range.
The MR-J3 ser vo amplifiers can be used for
global applications with superb operation
in the toughest environments.
Features
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High-performance CPU
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(MR-J3-T only)
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Adaptive vibration supression control
function for compensation for reso
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nance up to two resonance frequencies
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Advanced vibration suppression control
for compensation of motion overshoot
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Separate wiring of the control power
supply
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High responsiveness
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Real-Time Auto-Tuning (RTAT)
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Torque control function (MR-J3-A/B)
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Servo-lock anti-vibration function
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RS-422/USB personal computer inter-
face
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Automatic motor recognition
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Network capability
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Complies with global industrial
standards
Differences Between the Three MR-J3 Servo Amplifier Series
MR-J3-A (standard type)
The MR-J3-A series is ideal for servo applica-
tions using conventional control systems.
The servo amplifiers have two analog inputs
numerous digital inputs for activating inter-
nal application functions (ie. pulse train
positioning). Using the digital pulse train
method eliminates the problems inherent
in analog control, such as offset shifts caused
by temperature fluctuations and drifting
when the system is at rest.
The MR-J3-A series can be used in torque,
speed or position control mode.
Highlights
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2 analog inputs
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1 digital pulse train input
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7 preset speeds
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Supports three different types of pulse
train signals: standard encoder signals
(line driver or open collector); pulse and
direction; pulse train for right and left
rotation
MR-J3-B (SSCNET III bus type)
The MR-J3-B series supports connection to
Mitsubishi motion control and positioning
control systems. The drive systems are con-
nected to these controllers via SSCNET III, a
high-speed motion control enabling high
precision synchronization and advanced
interpolation. The minimum cycle time of
just 0.44 ms increases responsiveness and
reduces tact cycle of machine due to fast
data exchange. Setting up this plug-and-play
network couldn’t be easier; you just have to
select the axis address and connect the
preconfigured bus cable, which also makes
wiring errors impossible.
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Plug-and-play SSCNET III network
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Motor brake can be controlled directly
by the amplifier
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Emulated encoder outputs for connec-
tion of conventional slave drive systems
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Amplifier replacement is fast and simple
because data management is per
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formed by superior controller.
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Automatic position detection on
power-up thanks to absolute position
detection system (multi-turn absolute
positioning is realised by optional
back-up battery).
MR-J3-T (integrated positioning type)
The MR-J3-T ser ies is a compact and cost
effective servo solution with integrated
positioning control func tionality and
CC-Link communications capability. By
setting position and speed data by using
simple point tables in the servo amplifier,
positioning operation is possible with a
simple start signal from t he positioning
controller which is input by any standard
controller.
It is possible to store up to 256 position
steps in the amplifier. The positioning
tasks can be started by simply inputting
digital signals.
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Position and speed data, etc. can be set
via CC-Link or RS422 communication
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CC-Link interface can be also used for
transmitting positioning data to the
amplifier without using the internal
point table. Hence centralised data
management inside of a machine
control can be realised, too.
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Positioning by serial communication
(RS-422) for simple applications without
fieldbus interfaces
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Parameter unit, MR-PRU03 (optional),
makes parameter setting and operation
monitoring easier
CHARGE
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MR-J3-500A
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WARNING
OPEN
CHARGE
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R-J3-40
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SYSTEM DESCRIPTION ///
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