Troubleshooting Warnings - YASKAWA SGD7S series Product Manual

Warning
Number
A.9A0 Overtravel
Preventative Mainte-
A.9b0
nance Warning
Note: 1. A warning code is not output unless you set Pn001 to n.1 (Output both alarm codes and warning
codes).
2. Use Pn008 = n.X (Warning Detection Selection) to control warning detection.
However, the following warnings are not affected by the setting of Pn008 = n.X and other parameter
settings are required in addition to Pn008 = n.X.
Warning
A.911
A.923
A.930
A.942
A.971
A.9A0
A.9b0
12.3.2

Troubleshooting Warnings

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.
Warning Number:
Warning Name
A.900:
Position Deviation
Overflow
Warning Name
Overtravel was detected while the servo was ON.
One of the consumable parts has reached the end
of its service life.
Parameters That Must Be Set to Select Warning Detection
Pn310 = n.X (Vibration Detection Selection)
–
(Not affected by the setting of Pn008 = n.X.)
Pn008 = n.X (Low Battery Voltage Alarm/Warning Selection)
Pn423 = n.X (Speed Ripple Compensation Information Dis-
agreement Warning Detection Selection)
Pn008 = n.X (Function Selection for Undervoltage)
(Not affected by the setting of Pn008 = n.X.)
Pn00D = n.X (Overtravel Warning Detection Selection)
(Not affected by the setting of Pn008 = n.X.)
Pn00F = n.X (Preventative Maintenance Warning Selection)
Possible Cause
The Servomotor
U, V, and W wiring
is not correct.
A SERVOPACK
gain is too low.
The frequency of
the position refer-
ence pulse is too
high.
The acceleration
of the position ref-
erence is too high.
The excessive
position deviation
alarm level (Pn520
× Pn51E/100) is
too low for the
operating condi-
tions.
A failure occurred
in the SERVO-
PACK.
Meaning
Confirmation
Make sure that there are no
Check the wiring of the
faulty connections in the
Servomotor's Main Cir-
wiring for the Servomotor
cuit Cables.
and encoder.
Increase the servo gain,
Check the SERVO-
e.g., by using autotuning
PACK gains.
without a host reference.
Reduce the position refer-
Reduce the reference
ence pulse frequency or the
pulse frequency and try
reference acceleration rate,
operating the SERVO-
or reconsider the electronic
PACK.
gear ratio.
Reduce the reference Apply smoothing, i.e., by
acceleration and try using Pn216 (Position Ref-
operating the SERVO- erence Acceleration/ Decel-
PACK. eration Time Constant).
Check excessive posi-
tion deviation alarm
Optimize the settings of
level (Pn520 × Pn51E/
Pn520 and Pn51E.
100) to see if it is set to
an appropriate value.
Turn the power supply to
the SERVOPACK OFF and
ON again. If an alarm still
–
occurs, the SERVOPACK
may be faulty. Replace the
SERVOPACK.
12.3 Warning Displays

12.3.2 Troubleshooting Warnings

Continued from previous page.
Warning Code
Output
ALO1 ALO2 ALO3
H L
H L
Reference
page 6-98
–
page 12-3
page 8-60
page 6-14
page 5-34
page 9-17
Correction Reference
–
page 8-24
page 5-47
page 6-30
page 8-8
–
Continued on next page.
L
H
12
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