YASKAWA SGD7S Product Manual page 441

Alarm Number:
Possible Cause
Alarm Name
The cable between
the Serial Converter
Unit and SERVOPACK
is not wired correctly
or there is a faulty
contact.
A specified cable is
not being used
A.CF1:
between Serial Con-
Reception Failed
verter Unit and SER-
Error in Feed-
VOPACK.
back Option
Module Commu-
The cable between
nications
the Serial Converter
Unit and SERVOPACK
is too long.
The sheath on cable
between the Serial
Converter Unit and
SERVOPACK is bro-
ken.
Noise entered the
cable between the
A.CF2:
Serial Converter Unit
Timer Stopped
and SERVOPACK.
Error in Feed-
A failure occurred in
back Option
the Serial Converter
Module Commu-
Unit.
nications
A failure occurred in
the SERVOPACK.
The Servomotor U, V,
and W wiring is not
correct.
The position com-
mand speed is too
fast.
A.d00:
Position Devia-
tion Overflow
The acceleration of
(The setting of
the position reference
Pn520 (Position
is too high.
Deviation Over-
flow Alarm Level)
was exceeded by
the position devi-
ation while the
The setting of Pn520
servo was ON.)
(Position Deviation
Overflow Alarm Level)
is too low for the
operating conditions.
A failure occurred in
the SERVOPACK.
Confirmation
Correctly wire the cable
Check the wiring of the between the Serial Con-
external encoder. verter Unit and SERVO-
PACK.
Check the wiring speci-
fications of the external Use a specified cable.
encoder.
The length of the cable
Measure the length of
between the Serial Con-
the cable that connects
verter Unit and SERVO-
the Serial Converter
PACK must be 20 m or
Unit.
less.
Replace the cable
Check the cable that
between the Serial Con-
connects the Serial
verter Unit and SERVO-
Converter Unit.
PACK.
Correct the wiring around
the Serial Converter Unit,
– e.g., separate I/O signal
lines from the Main Circuit
Cables or ground.
Replace the Serial Con-
–
verter Unit.
Replace the SERVO-
–
PACK.
Make sure that there are
Check the wiring of the
no faulty contacts in the
Servomotor's Main Cir-
wiring for the Servomotor
cuit Cables.
and encoder.
Reduce the position refer-
Reduce the position
ence speed or the refer-
command speed and
ence acceleration rate, or
try operating the SER-
reconsider the electronic
VOPACK.
gear ratio.
Reduce the acceleration
of the position reference
using a MECHATROLINK
Reduce the reference
command. Or, smooth the
acceleration and try
position reference accel-
operating the SERVO-
eration by selecting the
PACK.
position reference filter
(ACCFIL) using a MECHA-
TROLINK command.
Check Pn520 (Position
Deviation Overflow
Optimize the setting of
Alarm Level) to see if it
Pn520.
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.
12.2 Alarm Displays
12.2.2 Troubleshooting Alarms
Continued from previous page.
Correction Reference
page 4-28
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page 5-42
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page 8-8
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Continued on next page.
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