YASKAWA E-V-MD Series User Manual page 270

10 Maintenance, Inspections, and Troubleshooting
10.2.2 Troubleshooting of Alarms
Alarm Number:
Alarm Name
(Alarm Description)
A.840:
Encoder Data Error
(Detected on the
encoder side.)
A.850:
Encoder Overspeed
(Detected when the
control power supply
was turned ON.)
(Detected on the
encoder side.)
A.860:
Encoder Overheated
(Only when an
absolute encoder is
connected.)
(Detected on the
encoder side.)
A.b31:
Current Detection
Error 1
A.b32:
Current Detection
Error 2
A.b33:
Current Detection
Error 3
A.b6A:
MECHATROLINK
Communications ASIC
Error 1
A.b6b:
MECHATROLINK
Communications ASIC
Error 2
A.bF0:
System Alarm 0
10-10
Cause
An encoder malfunctioned.
Malfunction of encoder because
of noise interference, etc.
The servomotor speed is higher
-1
than 200 min when the control
power supply was turned ON.
An encoder fault occurred.
The surrounding air temperature
around the servomotor is too
high.
The motor load is greater than the
rated load.
An encoder fault occurred.
The servomotor/encoder relay
cable is disconnected.
The current detection circuit for
phase U is faulty.
The servomotor/encoder relay
cable is disconnected.
The current detection circuit for
phase V is faulty.
The servomotor/encoder relay
cable is disconnected.
The detection circuit for the cur-
rent is faulty.
SERVOPACK MECHA-
TROLINK communication sec-
tion fault.
MECHATROLINK data recep-
tion error occurred due to noise
interference.
SERVOPACK MECHA-
TROLINK communication sec-
tion fault.
A SERVOPACK fault occurred.
Investigative Actions
−
−
Check the motor rotating speed to
confirm the servomotor speed when
the power is turned ON.
−
Measure the surrounding air tem-
perature around the servomotor.
Check the accumulated load ratio to
see the load.
−
Check the servomotor/encoder relay
cable.
−
Check the servomotor/encoder relay
cable.
−
Check the servomotor/encoder relay
cable.
−
−
−
−
−
(cont'd)
Corrective Actions
Restart the SERVOPACK. If the
alarm still occurs, the servomotor
may be faulty. Replace the servo-
motor.
Correct the wiring around the
encoder (e.g., grounding).
Reduce the servomotor speed to a
-1
value less than 200 min , and turn
ON the control power supply.
Restart the SERVOPACK. If the
alarm still occurs, the servomotor
may be faulty. Replace the servo-
motor.
The surrounding air temperature
must be 40°C or less.
The motor load must be within the
specified range.
Restart the SERVOPACK. If the
alarm still occurs, the servomotor
may be faulty. Replace the servo-
motor.
Correct the motor wiring.
Restart the SERVOPACK. If the
alarm still occurs, the SERVO-
PACK may be faulty. Replace the
SERVOPACK.
Correct the motor wiring.
Restart the SERVOPACK. If the
alarm still occurs, the SERVO-
PACK may be faulty. Replace the
SERVOPACK.
Correct the servomotor wiring.
Restart the SERVOPACK. If the
alarm still occurs, the SERVO-
PACK may be faulty. Replace the
SERVOPACK.
Restart the SERVOPACK. If the
alarm still occurs, the SERVO-
PACK may be faulty. Replace the
SERVOPACK.
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.
Restart the SERVOPACK. If the
alarm still occurs, the SERVO-
PACK may be faulty. Replace the
SERVOPACK.
Restart the SERVOPACK. If the
alarm still occurs, the SERVO-
PACK may be faulty. Replace the
SERVOPACK.