8.1 Alarm Displays
8-15
8
Trou
blesh
ooting
A.860:
Encoder Overheated
(Only when an absolute
encoder is connected.)
(Detected on the encoder
side.)
The ambient operating tempera-
ture around the servomotor is too
high.
Measure the ambient operating tem-
perature around the servomotor.
The ambient operating temperature
must be 40
°
C or less.
The motor load is greater than the
rated load.
Check the accumulated load ratio
(Un009) to see the load.
The motor load must be within the
specified range.
An encoder fault occurred.
−
Turn the control power supply OFF
and ON again. If the alarm still
occurs, the servomotor may be
faulty. Replace the servomotor.
A fault occurred in the multi-
winding drive unit.
−
Turn the control power supply OFF
and ON again. If the alarm still
occurs, the multi-winding drive unit
may be faulty. Replace the multi-
winding drive unit.
A.b31:
Current Detection
Error 1
The current detection circuit for
phase U is faulty.
−
Turn the control power supply OFF
and ON again. If the alarm still
occurs, the SERVOPACK may be
faulty. Replace the SERVOPACK.
A.b32:
Current Detection
Error 2
The current detection circuit for
phase V is faulty.
−
Turn the control power supply OFF
and ON again. If the alarm still
occurs, the SERVOPACK may be
faulty. Replace the SERVOPACK.
A.b33:
Current Detection
Error 3
The detection circuit for the cur-
rent is faulty.
−
Turn the control power supply OFF
and ON again. If the alarm still
occurs, the SERVOPACK may be
faulty. Replace the SERVOPACK.
The servomotor main circuit
cable is disconnected.
Check for disconnection of the ser-
vomotor main circuit cable.
Correct the servomotor wiring.
A.b6A:
MECHATROLINK
Communications ASIC
Error 1
The multi-winding drive unit or
SERVOPACK MECHA-
TROLINK communications sec-
tion has failed.
−
Turn the control power supply OFF
and ON again. If the alarm still
occurs, the multi-winding drive unit
or SERVOPACK may be faulty.
Replace the multi-winding drive
unit or SERVOPACK.
A.b6b:
MECHATROLINK
Communications ASIC
Error 2
MECHATROLINK data recep-
tion error occurred due to noise
interference.
−
Take measures against noise. Check
the MECHATROLINK communi-
cations cable and FG wiring and
take measures such as adding ferrite
core on the MECHATROLINK
communications cable.
The multi-winding drive unit or
SERVOPACK MECHA-
TROLINK communications sec-
tion has failed.
−
Turn the control power supply OFF
and ON again. If the alarm still
occurs, the multi-winding drive unit
or SERVOPACK may be faulty.
Replace the multi-winding drive
unit or SERVOPACK.
A.bF0:
System Alarm 0
A fault occurred in the multi-
winding drive unit.
−
Turn the control power supply OFF
and ON again. If the alarm still
occurs, the multi-winding drive unit
may be faulty. Replace the multi-
winding drive unit.
A.bF1:
System Alarm 1
A fault occurred in the multi-
winding drive unit.
−
Turn the control power supply OFF
and ON again. If the alarm still
occurs, the multi-winding drive unit
may be faulty. Replace the multi-
winding drive unit.
(cont’d)
Alarm Number:
Alarm Name
(Alarm Description)
Cause
Investigative Actions
Corrective Actions