The Servomotor - YASKAWA SGDV series User Manual

Warning Num-
ber: Warning
Cause
Name (Warning
Description)
The power supply volt-
age exceeds the speci-
fied limit.
Insufficient regenera-
tive resistance, regener-
A.920: ative resistor capacity,
Regenerative SERVOPACK capacity,
Overload or converter capacity.
(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 a
Overload
DB stop exceeds the DB
(Warning before
resistance capacity.
the alarm A.731
occurs)
A fault occurred in the
SERVOPACK or con-
verter.
A.930: The battery connection
is incorrect.
Absolute
Encoder Battery
The battery voltage is
Error
lower than the specified
(The absolute
value 2.7 V.
encoder battery
voltage is lower
than the specified
value.)
A fault occurred in the
SERVOPACK.
∗ Only when an
absolute encoder
is connected.
A.94A An incorrect parameter
Command number was sent to the
Option Module SERVOPACK from the
IF Data Setting host controller or com-
Warning 1 mand option module.
A.94B
Out-of-range data was
Command
sent to the SERVO-
Option Module
PACK from the host
IF Data Setting
controller or command
Warning 2
option module.
A.94C
Incorrect parameter data
Command
was sent to the SERVO-
Option Module
PACK from the host
IF Data Setting controller or command
Warning 3 option module.
Investigative Actions
Measure the power supply voltage.
Check the operating condition or the
capacity using the capacity selection
Software SigmaJunmaSize+, etc.
Check the load to the servomotor dur-
ing 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.
−
–
–
–
9.2 Warning Displays
(cont'd)
Corrective Actions
Set the power supply voltage within
the specified range.
Change the regenerative resistance,
regenerative resistor capacity, SER-
VOPACK capacity, or converter
capacity. Reconsider the operating
conditions using the capacity selection
software SigmaJunmaSize+, etc.
Reconsider the system including servo
drives, machine, and operating condi-
tions.
Take measures to ensure the servomo-
tor 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 or converter may
be faulty. Replace the SERVOPACK
or converter.
Reconnect the battery.
Replace the battery.
The SERVOPACK may be faulty.
Replace the SERVOPACK.
Specify the correct parameter number.
Specify the value of the parameter
within the allowable range.
Specify the value of the parameter
within the allowable range.
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