YASKAWA SGM7D-30F Product Manual page 298

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.
3.5 FT83 SERVOPACKs with Analog Voltage/Pulse Train References
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.
3.5.3 Troubleshooting Alarms
Continued from previous page.
Correction Reference
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Continued on next page.
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