3.5 FT83 SERVOPACKs with Analog Voltage/Pulse Train References
3.5.3 Troubleshooting Alarms
3
Maintenance
3-229
A.CF1:
Reception Failed
Error in Feed-
back Option
Module Commu-
nications
The cable between
the Serial Converter
Unit and SERVOPACK
is not wired correctly
or there is a faulty
contact.
Check the wiring of the
external encoder.
Correctly wire the cable
between the Serial Con-
verter Unit and SERVO-
PACK.
*1
A specified cable is
not being used
between Serial Con-
verter Unit and SER-
VOPACK.
Check the wiring speci-
fications of the external
encoder.
Use a specified cable.
–
The cable between
the Serial Converter
Unit and SERVOPACK
is too long.
Measure the length of
the cable that connects
the Serial Converter
Unit.
The length of the cable
between the Serial Con-
verter Unit and SERVO-
PACK must be 20 m or
less.
–
The sheath on cable
between the Serial
Converter Unit and
SERVOPACK is bro-
ken.
Check the cable that
connects the Serial
Converter Unit.
Replace the cable
between the Serial Con-
verter Unit and SERVO-
PACK.
–
A.CF2:
Timer Stopped
Error in Feed-
back Option
Module Commu-
nications
Noise entered the
cable between the
Serial Converter Unit
and SERVOPACK.
–
Correct the wiring around
the Serial Converter Unit,
e.g., separate I/O signal
lines from the Main Circuit
Cables or ground.
–
A failure occurred in
the Serial Converter
Unit.
–
Replace the Serial Con-
verter Unit.
–
A failure occurred in
the SERVOPACK.
–
Replace the SERVO-
PACK.
–
Continued on next page.
Continued from previous page.
Alarm Number:
Alarm Name
Possible Cause
Confirmation
Correction
Reference