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8.4 AC Servomotor Drivers SERVICE MANUAL RH5 8.4−5 DA3SEC−85−480−A0 Digital Operator Indication for Troubleshooting Digital Operator Indication (=NOTE=1) (T raceback Monitor) Lighting Condition Probable Causes Countermea…

RH5

8.4 AC Servomotor Drivers

SERVICE MANUAL

8.4−4

DA3SEC−85−480−A0

Digital Operator Indication for Troubleshooting

Digital Operator

Indication (=NOTE=1)

(Traceback Monitor)

Lighting Condition Probable Causes Countermeasures

Lights up when power is

supplied to the control

circuit.

Defective control circuit

board (1PWB)

Replace the

SERVOPACK.

Overcurrent

Lights up when power is

supplied to the main

circuit and servo power

is turned ON.

Defective current

feedback circuit

Defective main circuit

transistor module

Replace the

SERVOPACK.

Remains ON during

operation.

Lights up even after

turning power OFF and

then turning back ON.

Operation can be

resumed after a certain

period of time by

pressing <RESET> key.

Ambient temperature

near the SERVOPACK is

over 55qC.

Adjust the ambient

temperature of the

SERVOPACK for 55qC

or lower. (Heatsink

overheat)

Overvoltage

Lights up when the

motor accelerates or

decelerates.

Load CD

is too large.

x Check the inertia of the

machine with the value

converted to the motor

shaft.

x Connect the

regenerative unit.

Defective control circuit

board

Replace the

SERVOPACK.

Overspeed

When the reference is

input, the motor runs fast

and LED comes ON.

x Motor connection error

x Optical encoder

connection error

x Correct the motor

connection.

x Check pulses in phases

A, B and C on 2CN and

correct wiring.

(Instantaneous

overload)

Lights up during

operation.

Turning OFF power to

the control circuit and

then turning back ON

starts operation.

Operation is continued

for several seconds to

several tens of seconds

at a torque exceeding

the rating.

Check for overload and

adjust as necessary.

(Continuous overload)

Lights up during

operation.

Turning OFF power to

the control circuit and

then turning back ON

starts operation.

Operation is continued

for several tens of

seconds to several

hundreds of seconds at

a torque exceeding the

rating.

Check for overload and

adjust as necessary.

8.4 AC Servomotor Drivers

SERVICE MANUAL

RH5

8.4−5

DA3SEC−85−480−A0

Digital Operator Indication for Troubleshooting

Digital Operator

Indication (=NOTE=1)

(Traceback Monitor)

Lighting Condition Probable Causes Countermeasures

Encoder

error

Lights up during

operation.

Erroneous wiring or

incomplete contact of the

absolute encoder.

Check and correct signal

cables of phases A, B

and C of 2CN.

nco

er error

Malfunction of the

SERVOPACK pulse

counter.

x Turn OFF the SEN

signal, reset the alarm

and then turn the SEN

signal back ON.

x Take noise−control

measures.

Encoder backup error

Lights up after SEN

signal is input.

Absolute encoder battery

voltage dropped.

Set up the absolute

encoder.

Encoder checksum

error

Lights up after SEN

signal is input.

Absolute encoder

memory data check error

Set up the absolute

encoder.

Encoder battery

alarm

Lights up after SEN

signal is input.

Absolute encoder battery

voltage dropped.

Replace the battery and

enter the SEN signal

twice.

Encoder absolute

error

Lights up after SEN

signal is input.

Malfunction of the

absolute encoder.

Turn OFF the SEN

signal, reset the alarm

and then turn the SEN

signal back ON.

=HINT=

Display format is as indicated.

Digital Operator

Indication (=NOTE=1)

(Traceback Monitor)

Lighting Condition Probable Causes Countermeasures

Encoder overspeed

Lights up after SEN

signal is input.

The motor was turning

when the SEN signal

was input.

Enter the SEN signal

when the motor has

stopped.

Reference

read

error

Lights up during

operation.

Erroneous operation with

the reference input

reader

Press <RESET> key and

resume operation.

Reference

read

error

Failure of the reference

input reader

Replace the

SERVOPACK.

RH5

8.4 AC Servomotor Drivers

SERVICE MANUAL

8.4−6

DA3SEC−85−480−A0

Digital Operator Indication for Troubleshooting

Digital Operator

Indication (*1)

(Traceback Monitor)

Lighting Condition Probable Causes Countermeasures

The motor starts

momentary, then LED

Motor connection error Correct the motor

connection.

Overrun

comes ON.

Encoder connection error Correct the wiring of the

encoder.

Phase detection error

Lights up when power to

the control circuit is

supplied.

Lights up during

operation.

Erroneous wiring or

incomplete contact of the

absolute encoder.

Correct the signal cables

of the encoder.

Wire break with phase

PA, PB

The motor starts

momentarily, then LED

comes ON.

Wire break with phase

PA or PB of the optical

encoder.

Correct the signal cables

of the encoder.

Wire break with phase

The motor starts

momentarily, then LED

comes ON.

Wire break with phase

PC of the optical

encoder.

Correct the signal cables

of the encoder.

=NOTE= 3

Lights up when power to

the control circuit is

supplied or immediately

di it l

Poor connection

between digital operator

and SERVOPACK.

Cut the power OFF and

recheck the connection

then turn it back ON.

Digital operator

transmission error 1

after the digital operator

is connected to the

SER

VOP

ACK

Defective SERVOPACK

board.

Replace the

SERVOPACK.

SER

VOP

ACK

Digital operator failure Replace the digital

operator.

=NOTE= 3

Lights up during

operation.

Malfunction of the

internal circuit

Press <RESET> key and

resume operation.

Digital operator

transmission error 2

Defective internal circuit Replace the

SERVOPACK.

=NOTE= 2

Absolute

encoder

error

Lights up after SEN

signal is input.

Absolute encoder works

incorrectly.

x Enter the SEN signal

again.

x Set up the absolute

encoder.

Absolute

encoder

error

Absolute encoder

connection error

Correct wiring of the

absolute encoder.