5.2 List of Alarms
5-4
A.100
Overcurrent Detected
An overcurrent flowed through the power trans-
former or the heat sink overheated.
Gr.1
No
A.101
Motor Overcurrent
Detected
The current to the motor exceeded the allowable
current.
Gr.1
No
A.300
Regeneration Error
There is an error related to regeneration.
Gr.1
Yes
A.320
Regenerative Overload
A regenerative overload occurred.
Gr.2
Yes
A.330
Main Circuit Power Supply
Wiring Error
•
The AC power supply input setting or DC power
supply input setting is not correct.
•
The power supply wiring is not correct.
Gr.1
Yes
A.400
Overvoltage
The main circuit DC voltage is too high.
Gr.1
Yes
A.410
Undervoltage
The main circuit DC voltage is too low.
Gr.2
Yes
A.510
Overspeed
The motor exceeded the maximum speed.
Gr.1
Yes
A.511
Encoder Output Pulse
Overspeed
The pulse output speed for the setting of Pn212
(Encoder Output Pulses) was exceeded.
Gr.1
Yes
A.520
Vibration Alarm
Abnormal oscillation was detected in the motor
speed.
Gr.1
Yes
A.521
Autotuning Alarm
Vibration was detected during autotuning for the
tuning-less function.
Gr.1
Yes
A.550
Maximum Speed Setting
Error
The setting of Pn385 (Maximum Motor Speed) is
greater than the maximum motor speed.
Gr.1
Yes
A.710
Instantaneous Overload
The Servomotor was operating for several sec-
onds to several tens of seconds under a torque
that largely exceeded the rating.
Gr.2
Yes
A.720
Continuous Overload
The Servomotor was operating continuously
under a torque that exceeded the rating.
Gr.1
Yes
A.730
Dynamic Brake Overload
When the dynamic brake was applied, the rota-
tional or linear kinetic energy exceeded the
capacity of the dynamic brake resistor.
Gr.1
Yes
A.731
A.740
Inrush Current Limiting
Resistor Overload
The main circuit power supply was frequently
turned ON and OFF.
Gr.1
Yes
A.7A1
Internal Temperature Error
1 (Control Board Tempera-
ture Error)
The surrounding temperature of the control PCB
is abnormal.
Gr.2
Yes
A.7A2
Internal Temperature Error
2 (Power Board Tempera-
ture Error)
The surrounding temperature of the power PCB
is abnormal.
Gr.2
Yes
A.7A3
Internal Temperature Sen-
sor Error
An error occurred in the temperature sensor cir-
cuit.
Gr.2
No
A.7Ab
SERVOPACK Built-in Fan
Stopped
The fan inside the SERVOPACK stopped.
Gr.1
Yes
A.810
Encoder Backup Alarm
The power supplies to the encoder all failed and
the position data was lost.
Gr.1
No
A.820
Encoder Checksum Alarm
There is an error in the checksum results for
encoder memory.
Gr.1
No
A.830
Encoder Battery Alarm
The battery voltage was lower than the specified
level after the control power supply was turned
ON.
Gr.1
Yes
A.840
Encoder Data Alarm
There is an internal data error in the encoder.
Gr.1
No
A.850
Encoder Overspeed
The encoder was operating at high speed when
the power was turned ON.
Gr.1
No
A.860
Encoder Overheated
The internal temperature of encoder is too high.
Gr.1
No
A.861
Motor Overheated
The internal temperature of motor is too high.
Gr.1
No
Continued on next page.
Continued from previous page.
Alarm
Number
Alarm Name
Alarm Meaning
Servo-
motor
Stop-
ping
Method
Alarm
Reset
Possi-
ble?