Contents

Safety Instructions
About processing of waste
COMPLIANCE WITH EC DIRECTIVES
CONFORMANCE WITH UL/C-UL STANDARD
CONTENTS
1. FUNCTIONS AND CONFIGURATION
- 1.1 Overview
- 1.2 Function block diagram
- 1.3 Unit standard specifications
- 1.4 Function list
- 1.5 Model code definition
- 1.6 Combination with servo motor
- 1.7 Parts identification
- 1.8 Servo system with auxiliary equipment
2. INSTALLATION AND START UP
- 2.1 Environmental conditions
- 2.2 Installation direction and clearances
- 2.3 Keep out foreign materials
- 2.4 Cable stress
- 2.5 Mounting method
- 2.6 When switching power on for the first time
- 2.7 Start up
- 2.8 Control axis selection
3. SIGNALS AND WIRING
- 3.1 Connection example of control signal system
- 3.2 I/O signals of interface unit
  - 3.2.1 Connectors and signal arrangements
  - 3.2.2 Signal explanations
  - 3.2.3 Interfaces
- 3.3 Signals and wiring for extension IO unit
  - 3.3.1 Connection example
  - 3.3.2 Connectors and signal configurations
  - 3.3.3 Output signal explanations
- 3.4 Signals and wiring for base unit
  - 3.4.1 Connection example of power line circuit
  - 3.4.2 Connectors and signal configurations
  - 3.4.3 Terminals
  - 3.4.4 Power-on sequence
- 3.5 Connection of drive unit and servo motor
  - 3.5.1 Connection instructions
  - 3.5.2 Connection diagram
  - 3.5.3 I/O terminals
- 3.6 Alarm occurrence timing chart
- 3.7 Servo motor with electromagnetic brake
- 3.8 Grounding
- 3.9 Instructions for the 3M connector
4. OPERATION AND DISPLAY
- 4.1 Normal indication
  - 4.1.1 Display sequence
  - 4.1.2 If alarm/warning occurs
- 4.2 Status display mode of interface unit
  - 4.2.1 Display flowchart
  - 4.2.2 Status display of interface unit
  - 4.2.3 Diagnostic mode of interface unit
  - 4.2.4 Alarm mode of interface unit
  - 4.2.5 Interface unit parameter mode
  - 4.2.6 Output signal (DO) forced output
5. PARAMETERS
- 5.1 Drive unit
  - 5.1.1 Parameter write inhibit
  - 5.1.2 Lists
- 5.2 Interface unit
  - 5.2.1 IFU parameter write inhibit
  - 5.2.2 Lists
  - 5.2.3 Analog monitor
  - 5.2.4 Test operation mode
6. GENERAL GAIN ADJUSTMENT
- 6.1 Different adjustment methods
  - 6.1.1 Adjustment on a MELSERVO-J2M
  - 6.1.2 Adjustment using MR Configurator (servo configuration software)
- 6.2 Auto tuning
  - 6.2.1 Auto tuning mode
  - 6.2.2 Auto tuning mode operation
  - 6.2.3 Adjustment procedure by auto tuning
  - 6.2.4 Response level setting in auto tuning mode
- 6.3 Manual mode 1 (simple manual adjustment)
  - 6.3.1 Operation of manual mode 1
  - 6.3.2 Adjustment by manual mode 1
- 6.4 Interpolation mode
7. SPECIAL ADJUSTMENT FUNCTIONS
- 7.1 Function block diagram
- 7.2 Machine resonance suppression filter
- 7.3 Adaptive vibration suppression control
- 7.4 Low-pass filter
- 7.5 Gain changing function
  - 7.5.1 Applications
  - 7.5.2 Function block diagram
  - 7.5.3 Parameters
  - 7.5.4 Gain changing operation
8. INSPECTION
9. TROUBLESHOOTING
- 9.1 Alarms and warning list
- 9.2 Remedies for alarms
- 9.3 Remedies for warnings
10. OUTLINE DRAWINGS
- 10.1 MELSERVO-J2M configuration example
- 10.2 Unit outline drawings
  - 10.2.1 Base unit (MR-J2M-BU[ ])
  - 10.2.2 Interface unit (MR-J2M-P8B)
  - 10.2.3 Drive unit (MR-J2M-[ ] DU)
  - 10.2.4 Extension IO unit (MR-J2M-DO1)
  - 10.2.5 Battery unit (MR-J2M-BT)
- 10.3 Connector
11. CHARACTERISTICS
- 11.1 Overload protection characteristics
- 11.2 Power supply equipment capacity and generated loss
- 11.3 Dynamic brake characteristics
- 11.4 Encoder cable flexing life
12. OPTIONS AND AUXILIARY EQUIPMENT
- 12.1 Options
  - 12.1.1 Regenerative brake options
  - 12.1.2 Cables and connectors
  - 12.1.3 Maintenance junction card (MR-J2CN3TM)
  - 12.1.4 MR Configurator (servo configurations software)
- 12.2 Auxiliary equipment
  - 12.2.1 Recommended wires
  - 12.2.2 No-fuse breakers, fuses, magnetic contactors
  - 12.2.3 Power factor improving reactors
  - 12.2.4 Relays
  - 12.2.5 Surge absorbers
  - 12.2.6 Noise reduction techniques
  - 12.2.7 Leakage current breaker
  - 12.2.8 EMC filter
13. ABSOLUTE POSITION DETECTION SYSTEM
- 13.1 Features
- 13.2 Specifications
- 13.3 Confirmation of absolute position detection data
APPENDIX
- App 1. Status indication block diagram
REVISIONS

Mitsubishi Electric MRJ2MP8B, MRJ2M DU, MRJ2MBU Instruction Manual

Mitsubishi Electric MRJ2MP8B, MRJ2M DU, MRJ2MBU manual cover

Pages 195

Year 2005

Language(s)

of 195

Mitsubishi Electric MRJ2MP8B, MRJ2M DU, MRJ2MBU Specification

The Mitsubishi Electric MRJ2MP8B, MRJ2M DU, and MRJ2MBU are advanced servo drive components designed for high-performance industrial applications. The MRJ2MP8B is a compact, versatile servo amplifier known for its precision and reliability in controlling servo motors. It supports a wide range of motor capacities and offers features such as real-time auto-tuning, vibration suppression, and rapid-response frequency for enhanced operational efficiency. The MRJ2M DU, serving as the drive unit, integrates seamlessly with the MRJ2MP8B, providing robust control and communication capabilities. It is equipped with advanced diagnostic functions and a user-friendly interface, facilitating easy installation and maintenance. The MRJ2M DU supports various communication protocols, ensuring compatibility with diverse industrial systems and enabling real-time data exchange for improved process control. The MRJ2MBU serves as the base unit, housing essential components and ensuring secure connections between the drive and other system elements. Its design emphasizes durability and ease of integration, featuring compact dimensions and standardized interfaces to streamline assembly processes. Together, these components form a cohesive servo system engineered to deliver exceptional performance in precision applications, such as robotics, CNC machinery, and automated manufacturing systems. Their modular architecture allows for flexible configurations, adapting to specific operational requirements while maintaining high standards of energy efficiency and system reliability. Mitsubishi Electric’s commitment to innovation and quality is reflected in these components, offering users a comprehensive solution for advanced motion control applications.

Mitsubishi Electric MRJ2MP8B, MRJ2M DU, MRJ2MBU F.A.Q.

How do I initialize the MRJ2MP8B servo amplifier?

To initialize the MRJ2MP8B servo amplifier, ensure that all connections are properly made. Power on the unit and use the parameter unit or software to set the initial parameters such as servo gains, speed, and torque limits according to your application requirements.

What are the common troubleshooting steps if the MRJ2M DU is not powering on?

Check the power supply connections to ensure they are secure and providing the correct voltage. Inspect fuses and circuit breakers for any faults. Verify that the main power switch is on and that there are no external alarms or interlocks preventing power-up.

How can I reset alarms on the MRJ2MBU servo drive?

To reset alarms on the MRJ2MBU, first address the root cause of the alarm condition. Once resolved, you can reset the alarms by using the control panel or software interface, often through a reset button or command. Ensure the servo is powered off and on if necessary.

What maintenance procedures are recommended for the MRJ2MP8B servo system?

Regularly inspect and clean the servo system, checking for dust build-up and ensuring cooling vents are unobstructed. Verify cable connections, inspect for wear or damage, and periodically check the servo motor bearings and lubricate as needed following the manufacturer's guidelines.

How do I configure the communication settings for MRJ2M DU with a PLC?

To configure communication settings, connect the MRJ2M DU to the PLC using the appropriate communication interface (e.g., RS-485, Ethernet). Set the communication parameters such as baud rate, parity, and stop bits to match the PLC settings using the parameter unit or setup software.

What should I do if the MRJ2MBU is overheating?

Ensure adequate ventilation around the servo drive and check for obstructions in the cooling vents. Verify that the ambient temperature is within the specified operating range. Inspect for signs of internal component failure, such as burnt smells or discoloration, and consider reducing the load if overheating persists.

How can I optimize the servo tuning for the MRJ2MP8B?

Use the auto-tuning function available in the setup software to automatically adjust servo gains for optimal performance. Fine-tune manually if necessary by adjusting parameters such as proportional, integral, and derivative gains to achieve desired responsiveness and stability.

What is the procedure to replace the encoder on the MRJ2M DU motor?

First, power down and safely disconnect the motor from the drive. Remove the motor's protective cover to access the encoder. Carefully disconnect the encoder wiring and mounting screws, then remove the encoder. Install the new encoder by reversing these steps and recalibrate if necessary.

How do I perform a factory reset on the MRJ2MBU drive?

To perform a factory reset, navigate to the reset options in the drive's interface or setup software. Select the factory reset option and confirm your choice. Be aware that this will erase all user settings and restore the drive to its default state.

Can I use regenerative braking with the MRJ2MP8B, and how?

Yes, the MRJ2MP8B supports regenerative braking. Ensure that the regenerative unit is properly connected to the drive. Configure the braking settings in the drive's setup software, adjusting parameters such as braking torque and deceleration rates to match your application needs.