Yaskawa Σ-V Series AC Servo Drives Rotational Motor Analog Voltage Reference - Manual (Page 276)

9.2 Warning Displays
9-17
9
Trou
blesh
ooting
A.911:
Vibration
Abnormal vibration was
detected at the motor
speed.
Check for abnormal noise from the
servomotor, and check the speed and
torque waveforms during operation.
Reduce the motor speed or reduce the
servo gain by using the function such
as one-parameter tuning.
The moment of inertia
ratio (Pn103) value is
greater than the actual
value or is greatly
changed. Check the moment of inertia ratio.
Set the moment of inertia ratio
(Pn103) to an appropriate value.
A.930:
Absolute
Encoder Battery
Error
(The absolute
encoder battery
voltage is lower
than the specified
value.)
(Only when an
absolute encoder
is connected.)
The battery connection
is incorrect.
Check the battery connection. Reconnect the battery.
The battery voltage is
lower than the specified
value 2.7 V.
Measure the battery voltage. Replace the battery.
A SERVOPACK fault
occurred.
−
The SERVOPACK may be faulty.
Replace the SERVOPACK.
A.941:
Change of
Parameters
Requires Restart
Parameters that require
the restart have been
changed.
− Restart the SERVOPACK.
A.9A0:
Overtravel
(Overtravel status
is detected.)
When the servomotor
power is ON, over-
travel status is detected. Check the input signal monitor
(Un005) to check the status of the
overtravel signals.
Refer to 9.3 Troubleshooting Malfunc-
tion Based on Operation and Condi-
tions of the Servomotor . Even if
overtravel signals were not shown by
the input signal monitor (Un005),
momentary overtravel may have been
detected. Take the following precau-
tions.
• Do not specify movements that
would cause overtravel from the
host controller.
• Check the wiring of the overtravel
signals.
• Take countermeasures for noise.
(cont’d)
Warning
Number:
Warning Name
(Warning
Description)
Cause Investigative Actions Corrective Actions