YASKAWA SERVOPACK Sigma 7 Series, Product Manual, Page: 177 / 342

5.2 FT41 Specification
5.2.3 Troubleshooting Alarms
5-89
5
Maintenance
A.d01:
Position Devia-
tion Overflow
Alarm at Servo
ON
The servo was turned
ON after the position
deviation exceeded
the setting of Pn526
(Position Deviation
Overflow Alarm Level
at Servo ON) while the
servo was OFF.
Check the position
deviation while the
servo is OFF.
Optimize the setting of
Pn526 (Position Deviation
Overflow Alarm Level at
Servo ON).
*1
A.d02:
Position Devia-
tion Overflow
Alarm for Speed
Limit at Servo ON
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 a position reference
is input and the set-
ting of Pn520 (Posi-
tion Deviation
Overflow Alarm Level)
is exceeded.
–
Optimize the setting of
Pn520 (Position Deviation
Overflow Alarm Level). Or,
adjust the setting of
Pn529 or Pn584 (Speed
Limit Level at Servo ON).
*1
A.d0A:
Pressure
Feedback Loop
Deviation
Overflow
The difference
between the pressure
feedback reference
and the pressure
feedback detection
value exceeded the
level set in Pn447
(Pressure Feedback
Loop Deviation Over-
flow Level).
Check the pressure
feedback detection
monitor or pressure
feedback loop devia-
tion monitor.
•
Change the value of
Pn447 (Pressure Feed-
back Loop Deviation
Overflow Level).
•
Adjust the values of
Pn442 (Pressure Feed-
back Loop Integral
Time) and other pres-
sure feedback control
parameters.
3-18
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.E02:
MECHATROLINK
Internal Synchro-
nization Error 1
The MECHATROLINK
transmission cycle
fluctuated.
–
Remove the cause of
transmission cycle fluctu-
ation at the host control-
ler.
–
A failure occurred in
the SERVOPACK.
–
Turn the power supply to
the SERVOPACK OFF and
ON again. If an alarm still
occurs, the SERVOPACK
may be faulty. Replace the
SERVOPACK.
–
Continued on next page.
Continued from previous page.
Alarm Number:
Alarm Name
Possible Cause Confirmation Correction Reference