MEC-CP842-1.0E.pdf - 第208页

Troubleshooting >> Servo Syst em Troubleshooting 8-18 MEC-CP842-1.0E AC Servopack Check List for Troubleshooting Alarm Alarm Name Status Cause Check Item Remedy A.51 Overspeed • Occurs at control power ON. • Occurs…

Troubleshooting >> Servo System Troubleshooting

MEC-CP842-1.0E 8-17

AC Servopack Check List for Troubleshooting

Alarm Alarm Name Status Cause Check Item

Remedy

A.30 Regenerative

Error Detected

· Occurs at control power ON.

· Occurs at main power ON.

· Servopack defective.

· Wiring to regenerative resistor

defective.

· Servopack defective.

· Incorrect regenerative resistor

wiring.

· Regenerative resistor

disconnected.

· Check the wiring to regenerative

resistor.

· Servopack defective.

· Check that wiring to the

regenerative resistor is proper.

· Check the regenerative

resistance value.

· Replace the Servopack.

· Check the regenerative value

and correct the wiring.

· Replace the Servopack.

· Manually correct the wiring of the

external regenerative resistor.

· Replace the external

regenerative resistor.

A.32 Regenerative

overload

· Occurs at control power ON.

· Occurs at normal operation.

· Servopack defective.

· Parameter Pn600 set value is

not correct when a regenerative

resistor is mounted externally.

· Servopack defective.

· Check that parameter Pn600 set

value is correct.

· Servopack defective.

· Replace the Servopack.

· Set parameter Pn600 correctly.

· Replace the Servopack.

C746M5T14

A.40 Overvoltage · Occurs at control power ON.

· Occurs at main power ON

or when motor is in operation.

· Servopack defective.

· Excessive power supply voltage.

· Servopack defective.

· Check the AC power supply

voltage. (Is there excessive

voltage variation?)

· Servopack defective.

· Replace the Servopack.

· Set the AC power supply voltage

to a value in the normal setting

range.

· Replace the Servopack.

A.41 Undervoltage · Occurs at control power ON.

· Occurs at main power ON

or when motor is in operation.

· Servopack defective.

· Power supply voltage is

excessively small.

· Servopack defective.

· Power supply variation is large

and power supply is reduced.

· Check the AC power supply

voltage. (Pay attention to

different power supply applied.)

· Servopack defective.

· Check that a momentary power

failure has not occurred.

· Replace the Servopack.

· Set the AC power supply voltage

to a value in the normal setting

range.

· Replace the Servopack.

Troubleshooting >> Servo System Troubleshooting

8-18 MEC-CP842-1.0E

AC Servopack Check List for Troubleshooting

Alarm Alarm Name Status Cause Check Item

Remedy

A.51 Overspeed • Occurs at control power ON.

• Occurs at main power ON

or when motor is in

operation.

• Servopack defective.

• Incorrect motor wiring.

• Incorrect encoder wiring.

• Servopack defective.

• Check that the motor rotating

direction is correct (phases U, V

and W wiring).

• Servopack defective.

• Replace the Servopack.

• Manually correct the motor

wiring.

• Manually correct the encoder

wiring.

• Replace the Servopack.

A.71

A.72

Overload for

Instantaneous

Maximum Load

Overload for

Continuous

Minimum Load

• Occurs at control power ON.

• Occurs at main power ON

or when motor is in

operation.

• Servopack defective.

• Incorrect motor wiring.

(imperfect wiring or connection)

• Incorrect encoder wiring.

(imperfect wiring or connection)

• Servopack defective.

• Check that the connnection is

correct and that the motor wiring

does not have an open phase.

• Servopack defective.

• Excessive load on servo.

• Replace the Servopack.

• Manually correct the motor

wiring.

• Manually correct the encoder

wiring.

• Replace the Servopack.

• Check for excessive load on

components driven by the servo.

C746M5T15

A.73 Dynamic Brake

Overload

• Servopack defective. • Replace the Servopack.

A.74 Overload of

in-rush Current

Limit Resistor

• Occurs at control power ON.

• Occurs at main circuit

power supply ON/OFF.

• Servopack defective.

• The allowable frequency of

in-rush current limit resistor at

power ON/OFF is exceeded.

• Servopack defective.

• Check that the allowable

frequency of in-rush current limit

resistor (5 times/min) is not

exceeded.

• Check that the Servopack fan is

operating.

• Check that the fan for the control

board is operating.

• Check the ambient temperature

of the Servopack exceeds 35 °C.

• Excessive load on servo.

• Replace the Servopack.

• Reduce the main circuit power

supply ON/OFF frequency to

5 times/min.

• Replace the Servopack.

A.7A Heat Sink

Overheated

• Occurs at main power ON

or when motor is in

operation.

• Servopack defective.

• Ambient temperature of the

Servopack exceeds 35 °C.

• Replace the Servopack.

• Set the ambient temperature of

the Servopack to 35 °C or less.

• Check for excessive load on

components driven by the servo.

Troubleshooting >> Servo System Troubleshooting

MEC-CP842-1.0E 8-19

AC Servopack Check List for Troubleshooting

Alarm Alarm Name Status Cause Check Item

Remedy

A.81 Absolute Encoder

Backup Error

· Occurs at power ON.

(Pn002.2 = 0)

When used as absolute

encoder.

· Occurs at power ON.

(Pn002.2=1)

· Turn ON the power supply to the

absolute encoder for the first

time.

· Both PG power supply (+5V)

from the Servopack and the

battery power supply are failed.

· Absolute encoder defective.

· Servopack defective.

· Servopack defective when used

as incremental encoder.

· Check that the absolute encoder

has been set up.

· Check that the power is supplied

to the encoder side.

· Encoder defective at alarm

occurrence even by setting up

the absolute encoder again.

· Servopack defective if nothing is

wrong in the above check.

· Check that the battery is

connected correctly.

· Check that the battery voltage is

not reduced to 2.7 V or less.

· Servopack defective if nothing is

wrong in the above check.

· Set up the encoder.

· Set up the encoder after

restoring the power supply to

the encoder (by replacing the

battery, etc.).

· Replace the encoder.

· Replace the Servopack.

C746M5T16

A.82 Encoder

Checksum Error

· Occurs at power ON or

when motor is in

operation.

· Encoder defective.

· Servopack defective.

· Set up the encoder. Replace

the motor if the alarm occurs

frequently.

· Replace the Servopack.

A.83 Absolute Encoder

Battery Error

· Occurs at power ON.

(Pn002.2=0)

When used as absolute

encoder.

· Imperfect connection or

disconnection of battery.

· Battery voltage is reduced to the

specified value (2.7 V) or less.

· Servopack defective.

· Connect the battery properly.

· Replace the battery and turn

ON the encoder power supply again.

· Replace the Servopack.

A.84 Encoder Data

Error

· Occurs at power ON or

when motor is in

operation.

· Sensor in the encoder reads the

data improperly.

· Encoder malfunctions.

· Servopack defective.

· Turn ON the encoder power

supply again.

Replace the motor if the alarm

occurs frequently.

· Correct the wiring processing

around the encoder.

· Replace the motor if the alarm

occurs frequently.

· Replace the Servopack.

· Servopack defective when used

as incremental encoder.

· Occurs at power ON.

(Pn002.2=1)