Conditions Of The Servomotor - YASKAWA Sigma-V Series User Manual

Warning Num-
ber: Warning
Cause
Name (Warning
Description)
The AC power supply
voltage dropped to:
• 140 V or less for 200-
VAC SERVOPACKs.
• 280 V or less for 400-
VAC SERVOPACKs.
The power supply volt-
A.971:
age dropped during
Undervoltage
operation.
Occurrence of instanta-
neous power interrup-
tion.
A fault occurred in the
SERVOPACK or con-
verter.
A.9A0:
When the servomotor
Overtravel
power is ON, over-
(Overtravel status
travel status is detected.
is detected.)
Investigative Actions
Measure the power supply voltage.
Measure the power supply voltage.
Measure the power supply voltage.
−
Check the input signal monitor
(Un005) to check the status of the
overtravel signals.
10.2 Warning Displays
(cont'd)
Corrective Actions
Set the power supply voltage within
the specified range.
Increase the power supply capacity.
When the instantaneous power cut
hold time (Pn509) is set, decrease the
setting.
The SERVOPACK or converter may
be faulty. Replace the SERVOPACK
or converter.
Refer to 10.3 Troubleshooting Mal-
function Based on Operation and
Conditions 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.
10
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