Troubleshooting Of Alarms - YASKAWA Σ-V Series User Manual

8 Troubleshooting

8.1.2 Troubleshooting of Alarms

8.1.2 Troubleshooting of Alarms

When an error occurs in SERVOPACKs, an alarm is displayed such as A.
operator. Refer to the following table to identify the cause of an alarm and the action to be taken.
Contact your Yaskawa representative if the problem cannot be solved by the described corrective action.
Alarm:
Alarm Name
A.020:
Parameter Checksum
Error
(The parameter data in
the SERVOPACK is
incorrect.)
A.021:
Parameter Format
Error
(The parameter data for-
mat in the SERVOPACK
is incorrect.)
A.022:
System Checksum
Error
(The parameter data in
the SERVOPACK is
incorrect.)
A.030:
Main Circuit Detector
Error
A.040:
Parameter Setting
Error
(The parameter setting
was out of the allowable
setting range.)
A.041:
Encoder Output Pulse
Setting Error
8-6
Cause
The power supply voltage sud-
denly dropped.
The power supply went OFF
while changing a parameter set-
ting.
The number of times that parame-
ters were written exceeded the
limit.
Malfunction caused by noise
from the AC power supply or
grounding line, static electricity
noise, etc.
Gas, water drops, or cutting oil
entered the SERVOPACK and
caused failure of the internal
components.
A SERVOPACK fault occurred.
The software version of SERVO-
PACK that caused the alarm is
older than that of the written
parameter.
A SERVOPACK fault occurred.
The power supply voltage sud-
denly dropped.
The power supply went OFF
while setting an utility function.
A SERVOPACK fault occurred.
A SERVOPACK fault occurred.
The SERVOPACK and linear ser-
vomotor capacities do not match
each other.
A SERVOPACK fault occurred.
The parameter setting is out of
the specified range.
The electronics gear ratio is out
of the setting range.
The encoder output resolution
(Pn281) is out of the setting range
and does not satisfy the setting
conditions.
Investigative Actions
Measure the power supply voltage.
Note the circumstances when the
power supply went OFF.
Were the parameters frequently
changed through the host control-
ler?
Turn the power supply ON and OFF
several times. If the alarm still
occurs, there may be noise interfer-
ence.
Check the installation conditions.
Turn the power supply ON and OFF
several times. If the alarm still
occurs, the SERVOPACK is faulty.
Check Fn012 to see if the set soft-
ware version agrees with that of the
SERVOPACK. If not, an alarm may
occur.
−
Measure the power supply voltage.
Note the circumstances when the
power supply went OFF.
Turn the power supply ON and OFF
several times. If the alarm still
occurs, the SERVOPACK is faulty.
−
Check the combination of SERVO-
PACK and linear servomotor capac-
ities.
−
Check the setting ranges of the
parameters that have been changed.
Check the electronic gear ratio. The
ratio must satisfy:
0.001< (Pn20E/Pn210) <4000.
Check the parameter Pn281.
and CPF on the panel
Corrective Actions
Set the power supply voltage within
the specified range, and initialize
the parameter (Fn005).
Initialize the parameter (Fn005) and
then set the parameter again.
The SERVOPACK may be faulty.
Repair or replace the SERVO-
PACK.
Reconsider the method of writing
parameters.
Take countermeasures against
noise.
The SERVOPACK may be faulty.
Replace the SERVOPACK.
The SERVOPACK may be faulty.
Replace the SERVOPACK.
Write the parameter of another
SERVOPACK of the same model
with the same software version.
Then turn the power OFF and then
ON again.
The SERVOPACK may be faulty.
Replace the SERVOPACK.
The SERVOPACK may be faulty.
Replace the SERVOPACK.
The SERVOPACK may be faulty.
Replace the SERVOPACK.
The SERVOPACK may be faulty.
Replace the SERVOPACK.
The SERVOPACK may be faulty.
Replace the SERVOPACK.
Select the proper combination of
SERVOPACK and linear servomo-
tor capacities.
The SERVOPACK may be faulty.
Replace the SERVOPACK.
Set the parameter to a value within
the specified range.
Set the electronic gear ratio in the
range: 0.001< (Pn20E/Pn210)
<4000.
Set Pn281 to a correct value.