YASKAWA SGD7S-1R9D Product Manual page 530

15.3 Warning Displays
15.3.2 Troubleshooting Warnings
Warning Number:
Warning Name
942 hex:
Speed Ripple Com-
pensation Informa-
tion Disagreement
971 hex:
Undervoltage
9A0 hex:
Overtravel (Over-
travel status was
detected.)
9b0 hex:
Preventative Mainte-
nance Warning
15-50
Possible Cause Confirmation
–
The speed ripple
compensation
information stored
in the encoder –
does not agree
with the speed
ripple compensa-
tion information
stored in the SER-
–
VOPACK.
For a 400-V SER-
VOPACK, the AC
Measure the power
power supply volt-
supply voltage.
age dropped
below 280 V.
The power supply
Measure the power
voltage dropped
supply voltage.
during operation.
A momentary
Measure the power
power interrup-
supply voltage.
tion occurred.
The SERVOPACK
–
fuse is blown out.
A failure occurred
in the SERVO- –
PACK.
Overtravel was Check the status of the
detected while the overtravel signals on
servo was ON. the input signal monitor.
One of the con-
sumable parts has
–
reached the end
of its service life.
Continued from previous page.
Correction
Reset the speed ripple
compensation value on the
SigmaWin+.
Set Pn423 (2423 hex) to
n.1 (Do not detect
A.942 alarms). However,
changing the setting may
increase the speed ripple.
Set Pn423 (2423 hex) to
n.0 (Disable torque
ripple compensation). How-
ever, changing the setting
may increase the speed rip-
ple.
Set the power supply volt-
age within the specified
range.
Increase the power supply
capacity.
If you have changed the
setting of Pn509 (2509 hex)
(Momentary Power Inter-
ruption Hold Time),
decrease the setting.
Replace the SERVOPACK
and connect a reactor.
The SERVOPACK may be
faulty. Replace the SERVO-
PACK.
Even if an overtravel signal
is not shown by the input
signal monitor, momentary
overtravel may have been
detected. Take the following
precautions.
• Do not specify move-
ments that would cause
overtravel from the host
controller.
• Check the wiring of the
overtravel signals.
• Implement countermea-
sures against noise.
Replace the part. Contact
your Yaskawa representa-
tive for replacement.
Reference
page 8-59
page 8-59
page 8-59
–
–
page 6-14
page 4-18
–
page 5-29
page 9-14