Troubleshooting Warnings - YASKAWA SGD7S-1R9D Product Manual

15.3 Warning Displays

15.3.2 Troubleshooting Warnings

Warning
Code
942 hex
971 hex
9A0 hex Overtravel
9b0 hex
Note: 1. A warning code is not output unless you set Pn001 (2001 hex) to n.1 (Output both alarm codes and
2. Use Pn008 (2008 hex) = n.X (Warning Detection Selection) to control warning detection.

15.3.2 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
900 hex:
Position Deviation
Overflow
15-46
Warning Name
Speed Ripple Com-
pensation Information
Disagreement
Undervoltage
Preventative Mainte-
nance Warning
warning codes).
However, the following warnings are not affected by the setting of Pn008 (2008 hex) = n.X and other
parameter settings are required in addition to Pn008 (2008 hex) = n.X.
Warning Parameters That Must Be Set to Select Warning Detection
911 hex Pn310 (2310 hex) = n.X (Vibration Detection Setting)
Pn008 (2008 hex) = n.X (Low Battery Voltage Alarm/Warning
930 hex
Selection)
Pn423 (2423 hex) = n.X (Speed Ripple Compensation Information
942 hex
Disagreement Warning Detection Selection)
Pn008 (2008 hex) = n.X (Function Selection for Undervoltage)
971 hex
(Not affected by the setting of Pn008 (2008 hex) = n.X.)
Pn00D (200D hex) = n.X (Overtravel Warning Detection Selection)
9A0 hex
(Not affected by the setting of Pn008 (2008 hex) = n.X.)
9b0 hex Pn00F (200F hex) = n.X (Preventative Maintenance Selection)
Possible Cause
The Servomotor
U, V, and W wiring
is not correct.
A SERVOPACK
gain is too low.
The acceleration
of the position ref-
erence is too high.
The excessive
position deviation
alarm level (Pn520
(2520 hex) ×
Pn51E (251E
hex)/100) is too
low for the operat-
ing conditions.
A failure occurred
in the SERVO-
PACK.
The speed ripple compensation information stored in the encoder does
not agree with the speed ripple compensation information stored in the
SERVOPACK.
This warning occurs before an A.410 alarm (Undervoltage) occurs. If the
warning is ignored and operation is continued, an alarm may occur.
Overtravel was detected while the servo was ON.
One of the consumable parts has reached the end of its service life.
Confirmation
Check the wiring of the
Servomotor's Main Cir-
cuit Cables.
Check the SERVO-
PACK gains.
Reduce the reference
acceleration and try
operating the SERVO-
PACK.
Check excessive posi-
tion deviation alarm
level (Pn520 (2520 hex)
× Pn51E (251E hex)/
100) to see if it is set to
an appropriate value.
–
Continued from previous page.
Meaning
Reference
page 6-46
page 15-3
page 8-59
page 6-15
page 5-29
page 9-15
Correction
Make sure that there are no
faulty connections in the
wiring for the Servomotor
and encoder.
Increase the servo gain,
e.g., by using autotuning
without a host reference.
Reduce the acceleration of
the position reference using
an EtherCAT command.
Optimize the settings of
Pn520 (2520 hex) and
Pn51E (251E hex).
Turn the power supply to
the SERVOPACK OFF and
ON again. If an alarm still
occurs, the SERVOPACK
may be faulty. Replace the
SERVOPACK.
Continued on next page.
Reference
–
page 8-23
–
page 8-8
–