YASKAWA SGMJV User Manual page 324

Warning Num-
ber: Warning Cause
Name
The power supply
voltage exceeds the
specified limit.
Insufficient external
regenerative resis-
tance, regenerative
A.920:
resistor capacity, or
Regenerative
SERVOPACK capac-
Overload
ity.
(Warning before
Or, regenerative power
the alarm A.320
has been continuously
occurs)
flowing back.
Regenerative power
continuously flowed
back because negative
load was continuously
applied.
The servomotor rotates
because of external
force.
A.921:
Dynamic Brake
The rotating energy at
Overload
a DB stop exceeds the
(Warning before DB resistance capac-
the alarm A.731 ity.
occurs)
A SERVOPACK fault
occurred.
A.930:
The battery connec-
tion is incorrect.
Absolute
Encoder Battery
The battery voltage is
Error
lower than the speci-
(The absolute
fied value 2.7 V.
encoder battery
voltage is lower
than the specified
value.)
A SERVOPACK fault
occurred.
(Only when an
absolute encoder
is connected.)
A.94A
Data Setting
Disabled parameter
Warning 1
number was used.
(Parameter Num-
ber Error)
A.94B
Attempted to send val-
Data Setting
ues outside the range
Warning 2
to the command data.
(Out of Range)
A.94C
Data Setting
Calculation result of
Warning 3
set value is incorrect.
(Calculation Er-
ror)
Investigative Actions
Measure the power supply voltage.
Check the operating condition or the
capacity using the capacity selec-
tion Software SigmaJunmaSize+,
etc.
Check the load to the servomotor
during operation.
Check the operation status.
Check the power consumed by DB
resistance (Un00B) to see how many
times the DB has been used.
−
Check the battery connection.
Measure the battery voltage.
−
Refer to 9.3 Monitoring Communi-
cation Data on Occurrence of an
Alarm or Warning to determine
which command was the cause of
the warning.
Refer to 9.3 Monitoring Communi-
cation Data on Occurrence of an
Alarm or Warning to determine
which command was the cause of
the warning.
Refer to 9.3 Monitoring Communi-
cation Data on Occurrence of an
Alarm or Warning to determine
which command was the cause of
the warning.
9.2 Warning Displays
(cont'd)
Corrective Actions
Set the power supply voltage within
the specified range.
Change the regenerative resistance,
regenerative resistor capacity, or
SERVOPACK capacity. Reconsider
the operating conditions using the
capacity selection software Sigma-
JunmaSize+, etc.
Reconsider the system including
servo drives, machine, and operating
conditions.
Take measures to ensure the servo-
motor will not rotate because of
external force.
Reconsider the following:
• Reduce the motor reference speed.
• Reduce the moment of inertia
ratio.
• Reduce the number of times of the
DB stop operation.
The SERVOPACK may be faulty.
Replace the SERVOPACK.
Reconnect the battery.
Replace the battery.
The SERVOPACK may be faulty.
Replace the SERVOPACK.
Use the correct parameter number.
Set the value of the parameter within
the allowable range.
Set the value of the parameter within
the allowable range.
9
9-25