YASKAWA SGD7S Product Manual page 478

14.3 Warning Displays
14.3.2 Troubleshooting Warnings
Warning Number:
Warning Name
A.942:
Speed Ripple Com-
pensation Informa-
tion Disagreement
A.971:
Undervoltage
A.9b0:
Preventative Mainte-
nance Warning
A.A90:
Positioning Timeout
(A positioning com-
pletion timeout
occurred during a
positioning opera-
tion.)
A.A94:
Data Setting Warn-
ing (A parameter
was set to an out-
of-range value via
DeviceNet.)
A.A95:
Command Error
A.A96:
DeviceNet Commu-
nications Error (A
timeout or other
error occurred in
DeviceNet commu-
nications.)
14-52
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 200-V SER-
VOPACK, the AC
Measure the power
power supply volt-
supply voltage.
age dropped
below 140 V.
For a 100-V SER-
VOPACK, the AC
Measure the power
power supply volt-
supply voltage.
age dropped
below 60 V.
A momentary
Measure the power
power interrup-
supply voltage.
tion occurred.
The SERVOPACK
−
fuse is blown out.
A failure occurred
−
in the SERVO-
PACK.
One of the con-
sumable parts has
−
reached the end
of its service life.
The SERVOPACK
Check the SERVO-
gain is not
PACK gain.
adjusted.
The positioning
completion time-
Check the timeout error
out error check
check time.
time (PnB51) is
too short.
A parameter was
−
set outside of the
setting range.
There was an
error in a com- Check the command.
mand message.
DeviceNet com- Check the connections
munications have of the DeviceNet
timed out. cables.
Continued from previous page.
Correction
Reset the speed ripple
compensation value on the
SigmaWin+.
Set Pn423 to n.1 (Do
not detect A.942 alarms).
However, changing the set-
ting may increase the speed
ripple.
Set Pn423 to n.0
(Disable torque ripple com-
pensation). However,
changing the setting may
increase the speed ripple.
Set the power supply volt-
age within the specified
range.
Set the power supply volt-
age within the specified
range.
If you have changed the
setting of Pn509 (Momen-
tary Power Interruption Hold
Time), decrease the setting.
Replace the SERVOPACK
and connect a reactor.
The SERVOPACK may be
faulty. Replace the SERVO-
PACK.
Replace the part. Contact
your Yaskawa representa-
tive for replacement.
Adjust the gain.
Set the positioning comple-
tion timeout error check
time to a suitable value.
Correct the set value.
Check the command data
and then change the value
of the Data Enable bit.
Restart DeviceNet commu-
nications from the host con-
troller.
Continued on next page.
Reference
page 8-60
page 8-60
page 8-60
−
−
page 6-5
page 4-23
−
page 9-16
page 8-77
page 12-12
−
page 13-5
−