11. TROUBLESHOOTING

Display

Name

Definition

 

 

Cause

Action

AL.31

Overspeed

Speed has exceeded

1. Input command pulse frequency

Set command pulses correctly.

 

 

the instantaneous

 

exceeded the permissible

 

 

 

permissible speed.

 

instantaneous speed frequency.

 

 

 

 

2.

Small acceleration/deceleration

Increase acceleration/deceleration time

 

 

 

 

time constant caused overshoot to

constant.

 

 

 

 

be large.

 

 

 

 

3.

Servo system is instable to cause

1. Re-set servo gain to proper value.

 

 

 

 

overshoot.

2. If servo gain cannot be set to proper

 

 

 

 

 

 

 

 

value:

 

 

 

 

 

 

 

 

1) Reduce load inertia moment ratio; or

 

 

 

 

 

 

 

 

2) Reexamine acceleration/

 

 

 

 

 

 

 

 

deceleration time constant.

 

 

 

4.

Electronic gear ratio is large

Set correctly.

 

 

 

 

(parameters No. 4, 5)

 

 

 

 

5.

Encoder faulty.

Change the servo motor.

AL.32

Overcurrent

Current that flew is

1. Short occurred in servo amplifier

Correct the wiring.

 

 

higher than the

 

output phases U, V and W.

 

 

 

permissible current

2. Transistor (IPM) of the servo

Change the servo amplifier.

 

 

of the servo

 

amplifier faulty.

 

 

 

amplifier.

 

 

Checking method

 

 

 

 

 

 

 

 

 

 

 

 

 

Alarm (AL.32) occurs if power is

 

 

 

 

 

 

switched on after U,V and W

 

 

 

 

 

 

are disconnected.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

3.

Ground fault occurred in servo

Correct the wiring.

 

 

 

 

amplifier output phases U, V and

 

 

 

 

 

W.

 

 

 

 

4.

External noise caused the

Take noise suppression measures.

 

 

 

 

overcurrent detection circuit to

 

 

 

 

 

misoperate.

 

AL.33

Overvoltage

Converter bus

1. Lead of built-in regenerative brake

1. Change lead.

 

 

voltage exceeded

 

resistor or regenerative brake

2. Connect correctly.

 

 

400VDC.

 

option is open or disconnected.

 

 

 

 

2.

Regenerative transistor faulty.

Change servo amplifier

 

 

 

3.

Wire breakage of built-in

1. For wire breakage of built-in

 

 

 

 

regenerative brake resistor or

regenerative brake resistor, change

 

 

 

 

regenerative brake option

servo amplifier.

 

 

 

 

 

 

 

 

2. For wire breakage of regenerative brake

 

 

 

 

 

 

 

 

option, change regenerative brake

 

 

 

 

 

 

 

 

option.

 

 

 

4.

Capacity of built-in regenerative

Add regenerative brake option or increase

 

 

 

 

brake resistor or regenerative

capacity.

 

 

 

 

brake option is insufficient.

 

 

 

 

5.

Power supply voltage high.

Review the power supply.

AL.35

Command pulse

Input pulse

1. Pulse frequency of the manual

Change the pulse frequency to a proper

 

frequency error

frequency of the

 

pulse generator is too high.

value.

 

 

command pulse is

2. Noise entered the pulses of the

Take action against noise.

 

 

too high.

 

manual pulse generator.

 

 

 

 

3.

Manual pulse generator failure

Change the manual pulse generator.

11 - 5

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Image 232
Mitsubishi Electronics MR-J2S- CL specifications Reexamine acceleration, Option, change regenerative brake
Page 231 Page 233

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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