11. TROUBLESHOOTING

Display

Name

Definition

 

 

Cause

 

Action

AL.50

Overload 1

Load exceeded

1. Servo amplifier is used in excess of

1.

Reduce load.

 

 

overload protection

 

its continuous output current.

2.

Review operation pattern.

 

 

characteristic of

 

 

 

 

 

3.

Use servo motor that provides larger

 

 

servo amplifier.

 

 

 

 

 

 

output.

 

 

 

2. Servo system is instable and

1.

Repeat acceleration/

 

 

 

 

hunting.

 

deceleration to execute auto tuning.

 

 

 

 

 

 

 

 

2.

Change auto tuning response setting.

 

 

 

 

 

 

 

 

3.

Set auto tuning to OFF and make gain

 

 

 

 

 

 

 

 

 

adjustment manually.

 

 

 

3. Machine struck something.

1.

Review operation pattern.

 

 

 

 

 

 

 

 

2.

Install limit switches.

 

 

 

4. Wrong connection of servo motor.

Connect correctly.

 

 

 

 

Servo amplifier's output terminals

 

 

 

 

 

 

U, V, W do not match servo motor's

 

 

 

 

 

 

input terminals U, V, W.

 

 

 

 

 

5. Encoder faulty.

Change the servo motor.

 

 

 

 

 

Checking method

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

When the servo motor shaft is

 

 

 

 

 

 

 

rotated with the servo off, the

 

 

 

 

 

 

 

cumulative feedback pulses do

 

 

 

 

 

 

 

not vary in proportion to the

 

 

 

 

 

 

 

rotary angle of the shaft but the

 

 

 

 

 

 

 

indication skips or returns midway.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

AL.51

Overload 2

Machine collision or

1. Machine struck something.

1.

Review operation pattern.

 

 

the like caused max.

 

 

 

 

 

2.

Install limit switches.

 

 

output current to

2. Wrong connection of servo motor.

Connect correctly.

 

 

flow successively for

 

Servo amplifier's output terminals

 

 

 

 

several seconds.

 

U, V, W do not match servo motor's

 

 

 

 

Servo motor locked:

 

input terminals U, V, W.

 

 

 

 

1s or more

3. Servo system is instable and

1.

Repeat acceleration/deceleration to

 

 

During rotation: 2.5s

 

hunting.

 

execute auto tuning.

 

 

or more

 

 

 

 

 

 

 

 

 

2.

Change auto tuning response setting.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

3.

Set auto tuning to OFF and make gain

 

 

 

 

 

 

 

 

 

adjustment manually.

 

 

 

4. Encoder faulty.

Change the servo motor.

 

 

 

 

 

Checking method

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

When the servo motor shaft is

 

 

 

 

 

 

 

rotated with the servo off, the

 

 

 

 

 

 

 

cumulative feedback pulses do

 

 

 

 

 

 

 

not vary in proportion to the

 

 

 

 

 

 

 

rotary angle of the shaft but the

 

 

 

 

 

 

 

indication skips or returns midway.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

AL.52

Error excessive

The droop pulse

1. Acceleration/deceleration time

Increase the acceleration/deceleration

 

 

value of the

 

constant is too small.

time constant.

 

 

deviation counter

2. Internal torque limit 1 (parameter

Increase the torque limit value.

 

 

exceeded 2.5

 

No.28) is too small.

 

 

 

 

rotations.

3. Motor cannot be started due to

1.

Review the power supply capacity.

 

 

 

 

torque shortage caused by power

2.

Use servo motor which provides larger

 

 

 

 

supply voltage drop.

 

output.

 

 

 

4. Position control gain 1 (parameter

Increase set value and adjust to ensure

 

 

 

 

No.7) value is small.

proper operation.

 

 

 

5. Servo motor shaft was rotated by

1.

When torque is limited, increase the

 

 

 

 

external force.

 

limit value.

 

 

 

 

 

 

 

 

2.

Reduce load.

 

 

 

 

 

 

 

 

3.

Use servo motor that provides larger

 

 

 

 

 

 

 

 

 

output.

 

 

 

6. Machine struck something.

1.

Review operation pattern.

 

 

 

 

 

 

 

 

2.

Install limit switches.

 

 

 

7. Encoder faulty

Change the servo motor.

 

 

 

8. Wrong connection of servo motor.

Connect correctly.

 

 

 

 

Servo amplifier's output terminals

 

 

 

 

 

 

U, V, W do not match servo

 

 

 

 

 

 

motor's input terminals U, V, W.

 

 

11 - 7

Page 233 Page 235
Page 234
Image 234
Mitsubishi Electronics MR-J2S- CL specifications AL.50 Overload Load exceeded, Servo motor locked Input terminals U, V, W
Page 233 Page 235

MR-J2S- CL specifications

Mitsubishi Electronics has long been a pioneer in automation and control technology, and one of its prominent offerings is the MR-J2S-CL servo amplifier. Designed to enhance the performance of servo motors, the MR-J2S-CL is a critical component in various applications, ranging from industrial machinery to robotics.

One of the standout features of the MR-J2S-CL is its high-performance control capabilities. This servo amplifier supports both position and speed control, enabling precise movement and responsiveness in dynamic applications. The MR-J2S-CL boasts a sophisticated control algorithm that ensures superior torque response, making it ideal for applications that require quick and accurate motion control.

The MR-J2S-CL employs advanced features such as the Auto-Tuning function, which automatically adjusts the servo settings to optimize performance for the specific load conditions. This automation simplifies setup processes and reduces downtime, allowing users to quickly configure the system to their needs.

In terms of connectivity, the MR-J2S-CL is equipped with various communication options, including the CC-Link and Mitsubishi's own MELSEC communications. These options facilitate seamless integration with other devices and control systems, enhancing the overall interoperability of factory automation setups.

Another critical aspect of the MR-J2S-CL is its built-in safety features. The amplifier includes functionalities like safe torque off (STO) and overcurrent protection, which contribute to the overall safety of the operation. These safety measures are essential in reducing the risk of accidents in environments where human interaction occurs alongside machinery.

The MR-J2S-CL is designed with durability and reliability in mind. It has a robust construction that is capable of withstanding harsh industrial environments, including high temperatures and dust exposure. This resilience ensures a long service life, reducing maintenance needs and operational costs.

Furthermore, the MR-J2S-CL is compatible with a wide range of Mitsubishi servo motors, making it a versatile choice for various applications. Its comprehensive capabilities, combined with user-friendly interface options, allow for easy programming and monitoring of performance.

In summary, the Mitsubishi Electronics MR-J2S-CL servo amplifier stands out for its high-performance control, advanced safety features, and robust design. It effectively meets the demands of various industrial applications, making it a valuable asset in modern automation and manufacturing environments. With its blend of precision, reliability, and flexibility, the MR-J2S-CL continues to be a preferred choice for engineers and manufacturers alike.
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