15.2 Alarm Displays
15.2.2 Troubleshooting Alarms
15-25
15
Maintenance
8A1 hex:
External Encoder
Module Error
A failure occurred in
the external encoder.
–
Replace the external
encoder.
–
A failure occurred in
the Serial Converter
Unit.
–
Replace the Serial Con-
verter Unit.
–
8A2 hex:
External Incre-
mental Encoder
Sensor Error
A failure occurred in
the external encoder.
–
Replace the external
encoder.
–
8A3 hex:
External Abso-
lute Encoder
Position Error
A failure occurred in
the external absolute
encoder.
–
The external absolute
encoder may be faulty.
Refer to the encoder
manufacturer’s instruc-
tion manual for correc-
tions.
–
8A5 hex:
External Encoder
Overspeed
An overspeed error
was detected in the
external encoder.
Check the maximum
speed of the external
encoder.
Keep the external
encoder below its maxi-
mum speed.
–
8A6 hex:
External Encoder
Overheated
An overheating error
was detected in the
external encoder.
–
Replace the external
encoder.
–
A10 hex:
EtherCAT DC
Synchronization
Error
The synchronization
timing (Sync0) for Eth-
erCAT communica-
tions fluctuated.
–
Turn the power supply
OFF and ON again and re-
establish communica-
tions.
–
A11 hex:
EtherCAT State
Error
The EtherCAT com-
munications state left
the Operational state
during motor opera-
tion.
–
Reset the alarm and then
re-establish communica-
tions.
–
A12 hex:
EtherCAT Output
Data Synchroni-
zation Error
Noise caused an error
in EtherCAT commu-
nications.
–
Check the EtherCAT wir-
ing and implement noise
countermeasures.
–
The controller did not
update the process
data during the fixed
period.
Check the process data
specified by the control-
ler.
Correct the controller so
that the process data is
updated during the fixed
period.
–
The EtherCAT Com-
munications Cable or
connector wiring is
faulty.
Check the EtherCAT
Communications Cable
and connector wiring.
Wire the connections cor-
rectly.
–
A20 hex:
Parameter Set-
ting Error
The position unit is
outside of the setting
range.
Make sure it is within
the following range.
1/4,096 < Numerator
(2701 hex: 1)/Denomi-
nator (2701 hex: 2) <
65,536
Correct the setting of
position user unit
(2701
hex).
–
The speed unit is out-
side of the setting
range.
Make sure it is within
the following range.
1/128
≤
Numerator
(2702 hex: 1)/Denomi-
nator (2702 hex: 2)
≤
8,388,608
Correct the setting of
velocity user unit
(2702
hex).
–
The acceleration unit
is outside of the set-
ting range.
Make sure it is within
the following range.
1/128
≤
Numerator
(2703 hex: 1)/Denomi-
nator (2703 hex: 2)
≤
262,144
Correct the setting of
acceleration user unit
(2703 hex).
–
Continued on next page.
Continued from previous page.
Alarm Code:
Alarm Name
Possible Cause
Confirmation
Correction
Reference