Yaskawa Sigma-5 User Manual: Design and Maintenance - Rotary Motors - Manual (Page 271)

9 Troubleshooting
9.1.2 Troubleshooting of Alarms
9-6
9.1.2 Troubleshooting of Alarms
When an error occurs in SERVOPACKs, an alarm is displayed such as A. and CPF on the panel
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
Cause Investigative Actions Corrective Actions
A.020:
Parameter Checksum
Error
(The parameter data in
the SERVOPACK is
incorrect.)
The power supply voltage sud-
denly dropped.
Measure the power supply voltage.
Set the power supply voltage within
the specified range, and initialize
the parameter (Fn005).
The power supply went OFF
while changing a parameter set-
ting.
Note the circumstances when the
power supply went OFF. Initialize the parameter (Fn005) and
then set the parameter again.
The number of times that parame-
ters were written exceeded the
limit. Were the parameters frequently
changed through the host control-
ler?
The SERVOPACK may be faulty.
Repair or replace the SERVO-
PACK.
Reconsider the method of writing
parameters.
Malfunction caused by noise
from the AC power supply or
grounding line, static electricity
noise, etc. Turn the power supply ON and OFF
several times. If the alarm still
occurs, there may be noise interfer-
ence.
Take countermeasures against
noise.
Gas, water drops, or cutting oil
entered the SERVOPACK and
caused failure of the internal
components.
Check the installation conditions.
The SERVOPACK may be faulty.
Replace the SERVOPACK.
A SERVOPACK fault occurred.
Turn the power supply ON and OFF
several times. If the alarm still
occurs, the SERVOPACK is faulty.
The SERVOPACK may be faulty.
Replace the SERVOPACK.
A.021:
Parameter Format
Error
(The parameter data for-
mat in the SERVOPACK
is incorrect.)
The software version of SERVO-
PACK that caused the alarm is
older than that of the written
parameter. Check Fn012 to see if the set soft-
ware version agrees with that of the
SERVOPACK. If not, an alarm may
occur.
Write the parameter of another
SERVOPACK of the same model
with the same software version.
Then turn the power OFF and then
ON again.
A SERVOPACK fault occurred. −
The SERVOPACK may be faulty.
Replace the SERVOPACK.
A.022:
System Checksum
Error
(The parameter data in
the SERVOPACK is
incorrect.)
The power supply voltage sud-
denly dropped.
Measure the power supply voltage.
The SERVOPACK may be faulty.
Replace the SERVOPACK.
The power supply went OFF
while setting an utility function. Note the circumstances when the
power supply went OFF. The SERVOPACK may be faulty.
Replace the SERVOPACK.
A SERVOPACK fault occurred.
Turn the power supply ON and OFF
several times. If the alarm still
occurs, the SERVOPACK is faulty.
The SERVOPACK may be faulty.
Replace the SERVOPACK.
A.030:
Main Circuit Detector
Error
A SERVOPACK fault occurred. −
The SERVOPACK may be faulty.
Replace the SERVOPACK.
A.040:
Parameter Setting
Error
(The parameter setting
was out of the allowable
setting range.)
The SERVOPACK and servomo-
tor capacities do not match each
other.
Check the combination of SERVO-
PACK and servomotor capacities.
Select the proper combination of
SERVOPACK and servomotor
capacities.
A SERVOPACK fault occurred. −
The SERVOPACK may be faulty.
Replace the SERVOPACK.
The parameter setting is out of
the specified range. Check the setting ranges of the
parameters that have been changed. Set the parameter to a value within
the specified range.
The electronics gear ratio is out
of the setting range.
Check the electronic gear ratio. The
ratio must satisfy:
0.001< (Pn20E/Pn210) <4000. Set the electronic gear ratio in the
range: 0.001< (Pn20E/Pn210)
<4000.
A.041:
Encoder Output Pulse
Setting Error
The encoder output pulse (Pn212)
is out of the setting range and
does not satisfy the setting condi-
tions.
Check the parameter Pn212. Set Pn212 to a correct value.