MELSERVO-JET Servo Amplifier Features | Mitsubishi Electric Automation

Compact Servo Amplifiers with Simple Wiring (200 V)

Simple, Efficient Wiring

The servo amplifier offers simple wiring by having connectors on the top and bottom surfaces, and allows all cables and wires to be routed through wiring ducts. LEDs and switches are located on the front surface of the servo amplifiers for easy operation.

Tuning Functions

Use the tuning methods that are optimal for your machines.

Quick Tuning

This function automatically performs easy-to-use auto tuning that controls vibration and overshoot just by turning on the servo-on command. Before normal operation, the servo amplifier sets control gain and machine resonance suppression filters in 0.3 seconds by inputting torque to the servo motor automatically. After completing the setting, the servo amplifier starts operation normally.

One-Touch Tuning

This function automatically completes servo gain adjustment according to the mechanical characteristics and reduces the settling time just by turning on the one-touch tuning. The servo gain adjustment includes the machine resonance suppression filter, advanced vibration suppression control II, and the robust filter. Controlling overshoot and vibration is improved, maximizing your machine performance.

Advanced Vibration Suppression Control II

This function suppresses two types of low frequency vibrations, owing to vibration suppression algorithm which supports three-inertia system. This function is effective in suppressing residual vibration with relatively low frequency of approximately 100 Hz or less generated at the end of an arm and in a machine, enabling a shorter settling time. Adjustment is easily performed on MR Configurator2.

Command Notch Filter

The frequency can be set close to the machine vibration frequency because the command notch filter has an applicable frequency range between approximately 1 Hz and 2000 Hz.

Machine Resonance Suppression Filter

The expanded applicable frequency range is between 10 Hz and 8000 Hz. Five filters are simultaneously applicable, improving vibration suppression performance of a machine. The machine resonance frequency is detected by the machine analyzer function in MR Configurator2.

Preventive Maintenance

Machine Diagnosis (Mechanical Drive Components)

This function estimates when a machine failure will occur based on the total travel distance of the servo motor and notifies when it is time for replacement if the rated service life of the mechanical drive components is set.

・Machine total travel distance failure prediction

Servo Amplifier Life Diagnosis

This function displays the cumulative energization time and the number of inrush relay on/off times. The data can be used to check the service life of the parts as a rough guide.

Cumulative energization time (Smoothing condenser/cooling fan life span)
The number of inrush relay on/off times (Inrush relay life)

Corrective Maintenance

Drive Recorder

This function continuously monitors the servo status and records the status transition such as a trigger condition before and after an alarm for a fixed period of time. Reading the servo data on MR Configurator2 helps you analyze the cause of the alarm. In addition to the monitor values and the waveform of the past 16-time alarms in the alarm history, the system configuration and the servo parameters are displayed. Alarm occurrence time is also displayed when the servo amplifier and the controller are normally in communication on CC-Link IE TSN.
The data can be outputted to a GX LogViewer format file.

Connection/Communication Diagnosis

Disconnection Detection

The servo amplifiers detect an open phase condition on the output side. The alarm can be distinguished from other alarms such as the overload alarm, reducing the time required to restore the system.

Encoder Communication Diagnosis

The encoder communication diagnosis checks the encoder communication circuit in the servo amplifier. This function is useful for classifying the cause of errors (such as disconnected encoder cables) when the encoder communication alarm occurs.

Path Control

Super Trace Control

This function reduces a position deviation to nearly zero not only during constant-velocity operation, but also during constant acceleration/deceleration.
The path accuracy will be improved in high-rigidity machines.

Lost Motion Compensation

This function suppresses quadrant protrusion caused by friction and torsion generated when the servo motor rotates in a reverse direction.
Therefore, the accuracy of circular path will be improved in path control used in XY table, etc.

Path Tracking Model Adaptive Control

This function reduces path errors which occur when the servo motor reciprocates. Normally, when positioning control is executed, the model adaptive control adjusts the control to shorten a settling time. Instead, this function reduces overshooting to improve path accuracy, which is suitable for machines that require high-accuracy path control such as processing machines.

Safety Sub-FunctionsNEW

Safety Sub-Functions with Built-in Safety Functions

MR-JET-G4-HS has a built-in safety control part, supporting safety sub-functions by functional safety I/O signals or safety communication without a functional safety unit.

The servo amplifiers support the safety sub-functions of STO/SS1/SBC/SLS/SSM/SDI/SLT at a safety level of SIL 2 or SIL 3.

Safety Sub-Functions via Functional Safety I/O Signals

A safety system can be flexibly configured with MR-JET-G4-HS by directly connecting functional safety I/O signals to it without using a safety CPU or a safety remote I/O module.
The servo amplifier supports three points of functional safety I/O signals, enabling execution of multiple safety sub-functions.

Safety Communication Function via CC-Link IE TSN ^*2

CC-Link IE TSN enables building a system where safety and non-safety communications are mixed.
When combined with R_SFCPU-SET safety CPU and RD78G Motion module, MR-JET-G4-HS can receive safety signal data of the safety CPU through CC-Link IE TSN. Wiring the safety signals to the servo amplifiers is not necessary.

*1.Refer to "Safety Sub-Functions" for the compatible servo amplifiers.
*2.MR-JET-G4-HSN1 supports Safety over EtherCAT^® (safety data communication protocol) of EtherCAT^®.

Supporting Flexible Driving System

Fully Closed Loop Control ^*1

Supporting a fully closed loop control system as standard, MR-JET-G servo amplifiers enable further precise positioning.

*1.The servo amplifiers are compatible with two-wire type serial encoders and pulse train interface (A/B/Z-phase differential output type) encoders.
Use the servo amplifier manufactured in July 2022 or later.

Scale Measurement Function

Enhanced
functions

The scale measurement function transmits scale measurement data of a scale measurement encoder to a controller via network when the scale measurement encoder such as an A/B/Z-phase output type linear encoder or a rotary encoder is connected to a servo amplifier. This function enables flexible wiring from the scale measurement encoder.

Touch Probe Function ^*1

When a touch probe (sensor) that detects the position of workpieces is connected to a servo amplifier, the touch probe function latches (stores) the position detected by the touch probe. The controller reads and uses the latched value for position correction. The latch accuracy of this function is 1 μs.

*1.Use the servo amplifier manufactured in July 2022 or later.

Positioning by Using a CC-Link IE TSN Master/Local Module ^*1

A CC-Link IE TSN master/local module^*1 that supports CANopen can control the servo amplifiers.^*2 The servo amplifiers support both the profile mode (position/velocity/torque) and the positioning mode (point table). ^*3
In the profile position mode, for example, the target positions and speeds can be set from the master station. The servo amplifier generates commands to the target positions with a start signal and starts positioning operations.

*1.For details of CC-Link IE TSN master/local modules, refer to the manuals of each module.
*2.RD78G/FX5-SSC-G Motion modules also support CANopen.
*3.For the modes supported by the master station, refer to the master station specifications.

Command Interface

CC-Link IE TSN

MR-JET-G receives commands (position/velocity/torque) from a CC-Link TSN-compatible controller at regular intervals through synchronous communication and drive the servo motors.
When combined with a Motion module or Motion Control Software, the servo amplifiers perform exact synchronous operation of axes and machines through high-speed, high-precision time synchronization.
The servo amplifiers support CiA 402 drive profileand enable the profile mode (position/velocity/torque) and the positioning mode (point table). When combined with the controllers supporting the profile mode, the servo amplifiers generate a positioning command to a target position, reducing loads of the controllers.

CC-Link IE Field Network Basic

CC-Link IE Field Network Basic-compatible master stations such as an FX5U CPU module can control MR-JET-G servo amplifiers. The servo amplifier can be operated as a CANopen device via a link device.
The profile mode (position/velocity/torque) and the positioning mode (point table) are supported.
MR-JET-G servo amplifiers can be connected to existing systems using MR-JE-C.
In addition, MR-JET-G supports the line topology. ^*1

*1.When a device which does not support the line topology is used, the line/star mixed topology is applicable.

EtherCAT^®