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12.2 Alarm Displays
12.2.2 Troubleshooting Alarms
Alarm Number:
Alarm Name
A.d01:
Position Devia-
tion Overflow
Alarm at Servo
ON
A.d02:
Position Devia-
tion Overflow
Alarm for Speed
Limit at Servo ON
A.d10:
Motor-Load Posi-
tion Deviation
Overflow
A.d30:
Position Data
Overflow
A.E72:
Feedback Option
Module Detec-
tion Failure
12-36
Possible Cause
The servo was turned
ON after the position
deviation exceeded
Check the position
the setting of Pn526
deviation while the
(Excessive Position
servo is OFF.
Deviation Alarm Level
at Servo ON) while the
servo was OFF.
If position deviation
remains in the devia-
tion counter, the set-
ting of Pn529 or
Pn584 (Speed Limit
Level at Servo ON)
limits the speed when
the servo is turned
ON.
–
This alarm occurs if
reference pulses are
input and the setting
of Pn520 (Excessive
Position Deviation
Alarm Level) is
exceeded.
The motor direction
Check the motor direc-
and external encoder
tion and the external
installation orientation
encoder installation ori-
are backward.
entation.
There is an error in the
connection between
Check the coupling of
the load (e.g., stage)
the external encoder.
and external encoder
coupling.
The position data
Check the input refer-
exceeded
ence pulse counter.
±1,879,048,192.
There is a faulty con-
Check the connection
nection between the
between the SERVO-
SERVOPACK and the
PACK and the Feed-
Feedback Option
back Option Module.
Module.
The Feedback Option
Module was discon-
–
nected.
A failure occurred in
the Feedback Option
–
Module.
A failure occurred in
–
the SERVOPACK.
Confirmation
Set the position deviation
to be cleared while the
servo is OFF.
Optimize the setting of
Pn526 (Excessive Position
Deviation Alarm Level at
Servo ON).
Set the position deviation
to be cleared while the
servo is OFF.
Optimize the setting of
Pn520 (Excessive Position
Deviation Alarm Level).
Or, adjust the setting of
Pn529 or Pn584 (Speed
Limit Level at Servo ON).
Install the external
encoder in the opposite
direction, or change the
setting of Pn002 =
n.X (External
Encoder Usage) to
reverse the direction.
Check the mechanical
coupling.
Reconsider the operating
specifications.
Correctly connect the
Feedback Option Module.
Reset the Option Module
configuration error and
turn the power supply to
the SERVOPACK OFF and
ON again.
Replace the Feedback
Option Module.
Replace the SERVO-
PACK.
Continued from previous page.
Reference
Correction
for Correc-
tion
page 8-8
page 10-6
–
–
–
page 12-43
–
–
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Table of Contents
Troubleshooting
