YASKAWA SGD7S series Product Manual page 153

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.
4.2 SERVOPACKs with MECHATROLINK-III Communications References
Confirmation
Check the wiring of the
external encoder.
Check the wiring speci-
fications of the external
encoder.
Measure the length of
the cable that connects
the Serial Converter
Unit.
Check the cable that
connects the Serial
Converter Unit.
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–
–
Check the wiring of the
Servomotor's Main Cir-
cuit Cables.
Reduce the position
command speed and
try operating the SER-
VOPACK.
Reduce the reference
acceleration and try
operating the SERVO-
PACK.
Check Pn520 (Position
Deviation Overflow
Alarm Level) to see if it
is set to an appropriate
value.
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4.2.3 Troubleshooting Alarms
Continued from previous page.
Correction
Correctly wire the cable
between the Serial Con-
verter Unit and SERVO-
PACK.
Use a specified cable.
The length of the cable
between the Serial Con-
verter Unit and SERVO-
PACK must be 20 m or
less.
Replace the cable
between the Serial Con-
verter Unit and SERVO-
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
no faulty contacts in the
wiring for the Servomotor
and encoder.
Reduce the position refer-
ence speed or the refer-
ence acceleration rate, or
reconsider the electronic
gear ratio.
Reduce the acceleration
of the position reference
using a MECHATROLINK
command. Or, smooth the
position reference accel-
eration by selecting the
position reference filter
(ACCFIL) using a MECHA-
TROLINK command.
Optimize the setting of
Pn520.
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
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