YASKAWA SGD7S Product Manual page 504

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
Error in Feed-
SERVOPACK.
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 frequency of the
position reference
pulse is too high.
A.d00:
Position Devia-
tion Overflow
(The setting of
The acceleration of
Pn520 (Position
the position reference
Deviation Over-
is too high.
flow Alarm Level)
was exceeded by
the position devi-
The setting of Pn520
ation while the
(Position Deviation
servo was ON.)
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 reference
ence pulse frequency or
pulse frequency and try
the reference accelera-
operating the SERVO-
tion rate, or reconsider
PACK.
the electronic gear ratio.
Apply smoothing, i.e., by
Reduce the reference using Pn216 (Position
acceleration and try Reference Acceleration/
operating the SERVO- Deceleration Time Con-
PACK. stant).
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 4-27
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page 5-48
page 6-29
page 8-8
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Continued on next page.
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