Yaskawa Sigma-5 Large Capacity Users Manual: Design and Maintenance-Rotary Motors-Analog Voltage and Pulse Train Reference - Manual (Page 381)

10.2 Warning Displays
10-25
10
Trou
blesh
ooting
A.971:
Undervoltage
The AC power supply
voltage dropped to:
• 140 V or less for 200-
VAC SERVOPACKs.
• 280 V or less for 400-
VAC SERVOPACKs.
Measure the power supply voltage.
Set the power supply voltage within
the specified range.
The power supply volt-
age dropped during
operation.
Measure the power supply voltage. Increase the power supply capacity.
Occurrence of instanta-
neous power interrup-
tion.
Measure the power supply voltage.
When the instantaneous power cut
hold time (Pn509) is set, decrease the
setting.
A fault occurred in the
SERVOPACK or con-
verter.
−
The SERVOPACK or converter may
be faulty. Replace the SERVOPACK
or converter.
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 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.
(cont’d)
Warning Num-
ber: Warning
Name (Warning
Description)
Cause Investigative Actions Corrective Actions