16.5.3 Troubleshooting Warnings
16.5.3.1 Overview
The causes of and corrections for the warnings are given in the following table. Contact
your YASKAWA representative if you cannot solve a problem with the correction given in
the table.
16.5.3.2 Troubleshooting of the PROFINET Module Warnings
Warning
Code
Warning Name Possible Cause Confirmation Correction Reference
A.A91
(1A91h)
Invalid Cyclic
Data
The process data sent
from IO-Controller
contains invalid data.
Check the process
data sent by the IO-
Controller.
Correct cyclic set-
point data and send
command fault
acknowledge to
release the warning.
–
16.5.3.3 Troubleshooting of the SERVOPACK Warnings
Warning
Code
Warning Name Possible Cause Confirmation Correction Reference
A.900
(1900h)
Position Devia-
tion Overflow
The Servomotor U, V,
and W wiring is not
correct.
Check the wiring of
the Servomotor’s
Main Circuit Cables.
Make sure that there
are no faulty connec-
tions in the wiring for
the Servomotor and
encoder.
–
A SERVOPACK gain
is too low.
Check the SERVO-
PACK gains.
Increase the servo
gain, e.g., by using
autotuning without a
host reference.
Ä
Chap. 9.7
‘Autotuning
without Host
Reference’
page 321
The acceleration of
the position reference
is too high.
Reduce the refer-
ence acceleration
and try operating the
SERVOPACK.
Reduce the acceler-
ation of the position
reference using a
PROFINET com-
mand.
–
The excessive posi-
tion deviation alarm
level (Pn520 × Pn51E/
100) is too low for the
operating conditions.
Check excessive
position deviation
alarm level (Pn520 ×
Pn51E/100) to see if
it is set to an appro-
priate value.
Optimize the settings
of Pn520 and
Pn51E.
Ä
Chap. 9.4
‘Precautions to
Ensure Safe
Tuning’
page 299
A failure occurred in
the SERVOPACK.
– Turn the power
supply to the SER-
VOPACK OFF and
ON again. If an
alarm still occurs, the
SERVOPACK may
be faulty. Replace
the SERVOPACK.
–
Sigma-7 Series SERVOPACKs
Maintenance
Warning Displays > Troubleshooting Warnings
| | PROFINET Communications - SIEP YEUOC7P 02A Revision 0 | en | 640
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