Contents

List of Corrections Made to the MR-J2-A Specifications and Installation Guide
Addition to the MR-J2-A Specifications and Installation Guide
Safety Instructions
SAFETY INSTRCUTIONS
COMPLIANCE WITH EC DIRECTIVES
CONFORMANCE WITH UL/C-UL STANDARD
CONTENTS
CHAPTER 1 INTRODUCTION
- 1-1 Inspection at delivery
  - 1-1-1 Packing list
  - 1-1-2 Model definition
  - 1-1-3 Combination with servo motor
- 1-2 Parts identification and applications
  - 1-2-1 Servo amplifier
  - 1-2-2 Servo motor
- 1-3 Function list
- 1-4 Basic configuration
  - 1-4-1 MR-J2-100A or less
  - 1-4-2 MR-J2-200A or more
CHAPTER 2 OPERATION
- 2-1 Standard connection examples
  - 2-1-1 Position control mode
  - 2-1-2 Speed control mode
  - 2-1-3 Torque control mode
- 2-2 Operation
  - 2-2-1 Pre-operation checks
  - 2-2-2 Start-up
- 2-3 Display and operation
  - 2-3-1 Display flowchart
  - 2-3-2 Status display
  - 2-3-3 Diagnostic mode
  - 2-3-4 Alarm mode
  - 2-3-5 Parameter mode
- 2-4 Adjustments
  - 2-4-1 Auto tuning
  - 2-4-2 Manual gain adjustment
  - 2-4-3 Slight vibration suppression control
CHAPTER 3 WIRING
- 3-1 Servo amplifier
  - 3-1-1 Terminal blocks
  - 3-1-2 Signal connectors
  - 3-1-3 Detailed information on I/O signals
  - 3-1-4 Interfaces
- 3-2 Connection of servo amplifier and servo motor
  - 3-2-1 Connection instructions
  - 3-2-2 Connection diagram
  - 3-2-3 I/O terminals
  - 3-2-4 Connectors used for servo motor wiring
- 3-3 Common line
- 3-4 Grounding
- 3-5 Power supply circuit
- 3-6 Alarm occurrence timing chart
- 3-7 Servo motor with electromagnetic brake
CHAPTER 4 INSTALLATION
- 4-1 Servo amplifier
- 4-2 Servo motor
CHAPTER 5 ABSOLUTE POSITION DETECTION SYSTEM
CHAPTER 6 OPTIONS AND AUXILIARY EQUIPMENT
- 6-1 Dedicated options
  - 6-1-1 Regenerative brake options
  - 6-1-2 Cable connectors
  - 6-1-3 Junction terminal block
  - 6-1-4 Maintenance junction card
  - 6-1-5 Set-up software (will be released soon)
- 6-2 Auxiliary equipment
  - 6-2-1 Cables
  - 6-2-2 No-fuse breakers, fuses, magnetic contactors
  - 6-2-3 Power factor improving reactors
  - 6-2-4 Relays
  - 6-2-5 Surge absorbers
  - 6-2-6 Noise reduction techniques
  - 6-2-7 Leakage current breaker
  - 6-2-8 Battery (MR-BAT, A6BAT)
  - 6-2-9 Setting potentiometers for analog inputs
CHAPTER 7 INSPECTION
CHAPTER 8 TROUBLESHOOTING
- 8-1 Troubleshooting at start-up
  - 8-1-1 Position control mode
  - 8-1-2 Speed control mode
  - 8-1-3 Torque control mode
- 8-2 Alarms and warnings
  - 8-2-1 Alarm and warning list
  - 8-2-2 Alarms
  - 8-2-3 Warnings
CHAPTER 9 CHARACTERISTICS
- 9-1 Overload protection characteristics
- 9-2 Losses generated in the servo amplifier
- 9-3 Electromagnetic brake characteristics
- 9-4 Dynamic brake characteristics
- 9-5 Vibration rank
CHAPTER 10 SPECIFICATIONS
- 10-1 Standard specifications
- 10-2 Torque characteristics
- 10-3 Servo motors with reduction gears
- 10-4 Servo motors with special shafts
- 10-5 Outline dimension drawings
  - 10-5-1 Servo amplifiers
  - 10-5-2 Servo motors
  - 10-5-3 Servo motors (in inches)
  - 10-5-4 Cable side plugs
CHAPTER 11 SELECTION
- 11-1 Specification symbol list
- 11-2 Position resolution and electronic gear setting
- 11-3 Speed and command pulse frequency
- 11-4 Stopping characteristics
- 11-5 Capacity selection
- 11-6 Load torque equations
- 11-7 Load inertia moment equations
- 11-8 Precautions for zeroing
- 11-9 Selection example
REVISIONS

Mitsubishi Electric MRJ2A Instruction Manual

Pages 346

Year 2000

Language(s)

of 346

Mitsubishi Electric MRJ2A Specification

The Mitsubishi Electric MRJ2A is a sophisticated servo amplifier designed to enhance precision and efficiency in industrial automation systems. This device is part of the MELSERVO-J2 series, known for its advanced control features and robust performance in demanding environments. The MRJ2A servo amplifier supports high-speed, high-precision operations with a wide range of compatible motors, making it suitable for various applications in manufacturing and processing industries.

Featuring a compact design, the MRJ2A integrates seamlessly into existing systems, saving space while providing powerful functionality. Its advanced control algorithms enable precise positioning, velocity, and torque control, ensuring smooth and accurate motion. The amplifier includes auto-tuning capabilities, which simplify setup and optimize performance by automatically adjusting control parameters to match the connected servo motor characteristics.

The MRJ2A offers versatile communication options, supporting protocols like RS-232 and RS-422 for easy integration with PLCs and other control devices. This connectivity allows for real-time monitoring and adjustment, enhancing operational flexibility and system responsiveness. Additionally, the servo amplifier is equipped with multiple safety features, including overcurrent, overvoltage, and overheat protection, ensuring reliable operation and reducing maintenance needs.

Temperature and load monitoring functions are built into the MRJ2A, providing users with essential data to prevent downtime and prolong system life. Its energy-efficient design contributes to reduced operational costs while maintaining high performance levels. Overall, the Mitsubishi Electric MRJ2A servo amplifier is a versatile and reliable solution designed to meet the complex demands of modern automated systems, ensuring enhanced productivity and precision across various industrial applications.

Mitsubishi Electric MRJ2A F.A.Q.

How do I reset the Mitsubishi Electric MRJ2A servo amplifier?

To reset the MRJ2A servo amplifier, turn off the power supply, wait for a few moments, and then turn it back on. This should clear most errors.

What is the procedure for connecting the MRJ2A to a PLC?

Connect the MRJ2A to a PLC using compatible communication cables. Refer to the MRJ2A manual for pin configurations and ensure that your PLC is configured to communicate with the MRJ2A via the appropriate protocol.

How can I troubleshoot an overcurrent error on the MRJ2A?

Check for short circuits in the wiring, examine the motor for overload conditions, and ensure that the current limit settings are correct. If the issue persists, inspect the servo amplifier for faults.

What maintenance steps are recommended for the MRJ2A?

Regularly clean the unit to prevent dust accumulation, check and tighten electrical connections, inspect wiring for wear, and ensure proper ventilation around the unit to prevent overheating.

How can I upgrade the firmware on the MRJ2A?

To upgrade the firmware, connect your computer to the MRJ2A using a compatible interface, then use the Mitsubishi Electric firmware upgrade software to upload the new firmware version. Follow all on-screen instructions carefully.

What are common causes of a communication error on the MRJ2A?

Common causes include incorrect baud rate settings, faulty cables, incompatible communication protocols, or incorrect wiring. Double-check all settings and connections.

How can I optimize the performance of the MRJ2A?

Tune the servo amplifier parameters according to the specific load and application requirements. Use Mitsubishi's tuning software to adjust settings for optimal performance.

What should I do if the MRJ2A does not power on?

Check the power supply for proper voltage and current delivery, inspect the main power cable for damage, and verify that all fuses and circuit breakers are functional.

How do I handle a servo motor vibration issue with the MRJ2A?

Check for mechanical misalignments, ensure that the motor is securely mounted, and adjust the servo gain settings to reduce vibrations. Consider using vibration dampening mounts if necessary.

Can I use the MRJ2A in high-temperature environments?

The MRJ2A is designed for operation within specified temperature ranges. Ensure adequate cooling and ventilation to prevent overheating if operating in high-temperature environments.