11.TROUBLESHOOTING

11.TROUBLESHOOTING

11.1 Trouble at start-up

CAUTION

Excessive adjustment or change of parameter setting must not be made as it will

make operation instable.

 

POINT

Using the optional servo configuration software, you can refer to unrotated servo motor reasons, etc.

The following faults may occur at start-up. If any of such faults occurs, take the corresponding action.

11.1.1 Position control mode

(1) Troubleshooting

No.

Start-up sequence

Fault

Investigation

Possible cause

Reference

1

Power on

LED is not lit.

Not improved if connectors

1. Power supply voltage fault

 

 

 

LED flickers.

CN1A, CN1B, CN2 and CN3

2. Servo amplifier is faulty.

 

 

 

 

are disconnected.

 

 

 

 

 

Improved when connectors

Power supply of CNP1 cabling

 

 

 

 

CN1A and CN1B are

is shorted.

 

 

 

 

disconnected.

 

 

 

 

 

Improved when connector

1. Power supply of encoder

 

 

 

 

CN2 is disconnected.

cabling is shorted.

 

 

 

 

 

2. Encoder is faulty.

 

 

 

 

Improved when connector

Power supply of CN3 cabling is

 

 

 

 

CN3 is disconnected.

shorted.

 

 

 

Alarm occurs.

Refer to Section 11.2 and remove cause.

Section 11.2

2

Switch on servo-on

Alarm occurs.

Refer to Section 11.2 and remove cause.

Section 11.2

 

signal.

Servo motor shaft is

1. Check the display to see if

1. Servo-on signal is not input.

Section 7.3.2

 

 

not servo-locked

the servo amplifier is

(Wiring mistake)

 

 

 

(is free).

ready to operate.

2. 24VDC power is not

 

 

 

 

2. Check the external I/O

supplied to COM.

 

 

 

 

signal indication to see if

 

 

 

 

 

the servo-on (SON) signal

 

 

 

 

 

is ON.

 

 

3

Gain adjustment

Rotation ripples

Make gain adjustment in the

Gain adjustment fault

Chapter 7

 

 

(speed fluctuations)

following procedure:

 

 

 

 

are large at low

1. Increase the auto tuning

 

 

 

 

speed.

response level.

 

 

 

 

 

2. Repeat acceleration and

 

 

 

 

 

deceleration several times

 

 

 

 

 

to complete auto tuning.

 

 

 

 

Large load inertia

If the servo motor may be

Gain adjustment fault

Chapter 7

 

 

moment causes the

run with safety, repeat

 

 

 

 

servo motor shaft to

acceleration and

 

 

 

 

oscillate side to side.

deceleration several times to

 

 

 

 

 

complete auto tuning.

 

 

4

Cyclic operation

Position shift occurs

Confirm the cumulative

Pulse counting error, etc.

 

 

 

 

command pulses, cumulative

due to noise.

 

 

 

 

feedback pulses and actual

 

 

 

 

 

servo motor position.

 

 

11 - 1

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Mitsubishi Electronics MR-J2S- CL specifications Troubleshooting, Trouble at start-up, Make operation instable
Page 227 Page 229

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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