8.1 Alarm Displays
8.1.2 Troubleshooting Alarms
8-34
A.d10:
Motor-Load Posi-
tion Deviation
Overflow
The motor direction
and external encoder
installation orientation
are backward.
Check the motor direc-
tion and the external
encoder installation ori-
entation.
Install the external
encoder in the opposite
direction, or change the
setting of Pn002 =
n.X (External
Encoder Usage) to
reverse the direction.
*1
There is an error in the
connection between
the load (e.g., stage)
and external encoder
coupling.
Check the coupling of
the external encoder.
Check the mechanical
coupling.
–
A.d30:
Position Data
Overflow
The position data
exceeded
±1,879,048,192.
Check the input refer-
ence pulse counter.
Reconsider the operating
specifications.
–
A.E71:
Safety Option
Module Detec-
tion Failure
The connection
between the SERVO-
PACK and the safety
option module is
faulty.
Check the connection
between the SERVO-
PACK and the safety
option module.
Correctly connect the
safety option module.
–
The safety option
module was discon-
nected.
–
Execute Fn014 (Reset-
ting configuration error of
option module) using the
digital operator or Sig-
maWin+ and turn the
power supply OFF and
then ON again.
*1
A safety option mod-
ule fault occurred.
–
Replace the safety option
module.
–
A failure occurred in
the SERVOPACK.
–
Replace the SERVO-
PACK.
–
A.E72:
Feedback Option
Module Detec-
tion Failure
There is a faulty con-
nection between the
SERVOPACK and the
Feedback Option
Module.
Check the connection
between the SERVO-
PACK and the Feed-
back Option Module.
Correctly connect the
Feedback Option Module.
–
The Feedback Option
Module was discon-
nected.
–
Reset the Option Module
configuration error and
turn the power supply to
the SERVOPACK OFF and
ON again.
*1
A failure occurred in
the Feedback Option
Module.
–
Replace the Feedback
Option Module.
–
A failure occurred in
the SERVOPACK.
–
Replace the SERVO-
PACK.
–
A.E74:
Unsupported
Safety Option
Module
A safety option mod-
ule fault occurred.
–
Replace the safety option
module.
–
A unsupported safety
option module was
connected.
–
Connect a compatible
safety option module.
–
A.E75
*3
:
Unsupported
Feedback Option
Module
A feedback option
module fault
occurred.
–
Replace the feedback
option module.
–
A unsupported feed-
back option module
was connected.
Refer to the catalog of
the connected feed-
back option module or
the manual of the SER-
VOPACK.
Connect a compatible
feedback option module.
–
Continued on next page.
Continued from previous page.
Alarm Number:
Alarm Name
Possible Cause Confirmation Correction Reference
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