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AV131 MAINTENANCE MANUAL 4.1 Cont rol Syst e m Confi guration D79MEC- 14-020-A0 4.1- 8 Func ti on Error code N o. Cause Co untermeasu re * Over heat 15 Tem peratur e o f the radiat or or pow er elem ents in the serv o am…

AV131

MAINTENANCE MANUAL

4.1 Control System Configuration

D79MEC-14-020-A0

4.1-7

Function

Error

code No.

Cause Countermeasure

Insufficient

main power

voltage

Instantaneous stop between L1-L3

lasted longer than the time set by the

SV.Pr6D (main power off detection

time) when the SV.Pr65 (LV when

main power off) was set at 1. Or

voltage between P and N of the main

power converter dropped to below

the rated value when the servo

amplifier was ON.

1. Low power supply voltage.

2. Instantaneous power failure

occurred.

3. Insufficient power capacity:

Voltage dropped due to rush

current at power ON.

4. Open phase: Servo amplifier with

3-phase input spec. was operated

with single-phase power.

5. Faulty servo amplifier (circuit).

Measure the line voltage of the main power

input terminal ‘connector or terminal block

(L1, L2, L3)’.

1. Change the power supply. Eliminate the

cause of failed electromagnetic contactor

and turn power back ON.

2. Increase the setting time of SV.Pr6D

(Main power OFF detection time).

Set each phase of the power supply

correctly.

3. Increase the power capacity.

4. Connect each phase (L1, L2, L3) of the

power supply correctly.

Use L1 and L3 for a single phase

100/200V.

5. Replace the servo amplifier.

* Overcurrent 14

Current exceeding rated value of the

converter flowed.

1. Faulty servo amplifier (Defective

parts in the circuit or IGBT)

2. Short-circuit occurred in the motor

wire terminals U, V and W.

3. Ground fault occurred in the motor

wire.

4. The motor burnt out.

5. The motor wire in poor contact.

6. The relay of the dynamic of brake

welded by frequent ON/OFF of the

servo amplifier.

7. Mismatch between the motor and

servo amplifier.

1. Disconnect the motor cable and turn ON

the servomotor. If the same error

reoccurs immediately, replace the servo

amplifier with a new one (or the one that

is running properly).

2. Check the motor wires U, V and W for

short circuit.

Check for any whiskers on the connector

leads.

Make sure the motor wires are connected

properly

3. Check the insulation resistance between

the motor wire terminals U/V/W and the

grounding wire.

In case of an insulation failure, replace

the motor.

4. Check the resistance of the motor

between the lines for proper balance. If

not balanced, replace the motor.

5. Check the connector pins U, V and W at

the motor terminal. If loose or missing,

secure them in place.

6. Replace the servo amplifier. Do not turn

ON/OFF the servo to start/stop the

amplifier.

7. Check the product number (capacity) of

the motor/servo amplifier on the

nameplate and change to the motor

applicable to the servo amplifier.

AV131

MAINTENANCE MANUAL

4.1 Control System Configuration

D79MEC-14-020-A0

4.1-8

Function

Error

code No.

Cause Countermeasure

* Overheat 15

Temperature of the radiator or power

elements in the servo amplifier

exceeded the rated values.

1. Ambient temperature of servo

amplifier is over the rated value.

2. Overloaded

1. Check the ambient temperature of the

servo amplifier and remedy the cooling

conditions.

2. Increase the servo amplifier/motor

capacity.

Increase the acceleration/deceleration

time.

Reduce load.

Overload 16

If the torque command value

exceeds the overload level set by

SV.Pr72 (overload level setting),

overload will result based on the time

limit characteristics to be described

later.

1. The unit was activated for a long

time with heavy load and the

effective torque exceeded the

rated torque.

2. Oscillation or hunting occurred due

to improper adjustment of gain.

3. Improper or broken motor wiring

4. Collided with the mechanical unit

or the mechanical unit was

sluggish suddenly. The mechanical

unit became complicated.

5. Motor is driven with the

electromagnetic brake.

6. Motor cable misconnected to

another axis when multiple units

are connected.

7. The value of SV.Pr.72 is too small.

Check the torque (current) waveform for

oscillation or large vertical swing on the

graphic display of the PANATERM®.

Check the warning message for overload

and load factor with the PANATERM®.

1. Increase the servo amplifier/motor

capacity. Increase the capacity of the

Increase the acceleration/ deceleration

time or reduce the load.

2. Readjust the gain.

3. Connect the wiring of the motor

according to the wiring diagrams.

Replace the cable.

For CN X2, connect the cables in the

order of black (W), white (V) and red (U)

from the bottom.

4. Correct the distortion of machine.

Reduce load.

5. Measure the voltage at the

electromagnetic brake terminal.

Release the electromagnetic brake.

6. Perform wiring properly so that the motor

cable and encoder cable may be

connected one-one-one to the amplifier.

7. Reset the SV.Pr72 value (reset to the

default setting).

AV131

MAINTENANCE MANUAL

4.1 Control System Configuration

D79MEC-14-020-A0

4.1-9

Function

Error

code No.

Cause Countermeasure

The regenerative energy exceeded

the processing capacity of the

regenerative resistor.

1. Regenerative in deceleration due

to large inertia caused the

converter voltage to rise. Also,

insufficient absorption of

regenerative resistance energy

further raised the voltage.

2. The regenerative energy cannot be

absorbed within the prescribed

deceleration time because of high

number of motor rotations.

3. Operating limit of the external

resistor has been limited to 10%

duty.

Check the load factor of the regenerative

resistor on the monitor of the

PANATERM®. This cannot be used with

sequential regenerative control.

1. Increase the regenerative processing

capacity, by changing to a motor/

amplifier of larger capacity or by

providing an external regenerative

resistor.

2. Reduce the regenerative energy during

deceleration, by decreasing the motor

rotations or by prolonging the

deceleration time, etc.

3. When the SV.Pr6C (external

regenerative resistor selection) is 0 and

the built-in regenerative resistor is used,

and the SV.Pr6C is 3 and no external

regenerative resistor is used, use one

and set the SV.Pr6C to 1.

When the external regenerative resistor

is used and the SV.Pr6C is 1, secure the

regenerative overload protective

measures externally and set the

SV.Pr.6C to 2.

=REMARKS=

Before setting the SV.Pr.6C to 2, be sure to provide external protection, such

as temperature fuse.

Otherwise, the protection for regenerative resistor is lost and the regenerative

resistor generates heat abnormally, resulting in burnout.

Regeneration

overload

Encoder

communi-

cation error

Communication between the encoder

and servo amplifier was interrupted

at a certain count and breaking

detection function activated.

* Encoder

communi-

cation data

error

Data from the encoder caused

communication error. (Mainly due to

noise in the data) Although the data

was received successfully, the

contents of data were abnormal.

Connect the encoder cable according to the

wiring diagram.

Reconnect the connector pins correctly.

Connect the encoder cable to the CN X6

connector. (Check if the connector is not

connected to the CNX7 connector for the

external scale.)

Secure the power supply voltage 5V

DC±5% (4.75 to 5.25V) of the encoder. Use

care especially when the encoder cable is

long.

Separate the motor cable from the encoder

cable if connected together.

Excessive

positional

deviation

Positional deviation pulse exceeded

the set value of SV.Pr.70 (Excessive

positional deviation).

1. The motor failed to follow the

movement of command.

2. The value of SV.Pr.70 (Excessive

positional deviation) is small.

1. Check if the motor rotates according to

the position command.

Check the torque monitor for saturated

output torque. Adjust the gain. Set

SV.Pr5E (1st torque limit setting) to the

maximum value. Connect the encoder

according to the wiring diagram. Increase

the acceleration/ deceleration time and

lighten the load to decrease the speed.

2. Increase the set value of SV.Pr70.