YASKAWA E-7S SERVOPACK SGD7S Product Manual page 547

15.2 Alarm Displays
15.2.2 Troubleshooting Alarms
Alarm Number:
Alarm Name
A.CF1:
Reception Failed
Error in Feed-
back Option
Module Commu-
nications
A.CF2:
Timer Stopped
Error in Feed-
back Option
Module Commu-
nications
15-36
Possible Cause
The cable between
the Serial Converter
Unit and SERVOPACK Check the wiring of the
is not wired correctly external encoder.
or there is a faulty
contact.
A specified cable is
not being used Check the wiring speci-
between Serial Con- fications of the external
verter Unit and SER- encoder.
VOPACK.
The cable between Measure the length of
the Serial Converter the cable that connects
Unit and SERVOPACK the Serial Converter
is too long. Unit.
The sheath on cable
between the Serial Check the cable that
Converter Unit and connects the Serial
SERVOPACK is bro- Converter Unit.
ken.
Noise entered the
cable between the
–
Serial Converter Unit
and SERVOPACK.
A failure occurred in
the Serial Converter –
Unit.
A failure occurred in
–
the SERVOPACK.
Confirmation
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.
Continued from previous page.
Correction Reference
page 4-28
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