16.2 Alarm Displays
16.2.1 List of Alarms
16-7
16
Maintenance
521h
Autotuning Alarm
Vibration was detected during autotuning for the
tuning-less function.
Gr.1
Yes
550h
Maximum Speed Setting
Error
The setting of Pn385 (2385h) (Maximum Motor
Speed) is greater than the maximum motor
speed.
Gr.1
Yes
710h
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
720h
Continuous Overload
The Servomotor was operating continuously
under a torque that exceeded the rating.
Gr.1
Yes
730h
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
731h
740h
Inrush Current Limiting
Resistor Overload
The main circuit power supply was frequently
turned ON and OFF.
Gr.1
Yes
7A1h
Internal Temperature Error
1 (Control Board Tempera-
ture Error)
The surrounding temperature of the control PCB
is abnormal.
Gr.2
Yes
7A2h
Internal Temperature Error
2 (Power Board Tempera-
ture Error)
The surrounding temperature of the power PCB
is abnormal.
Gr.2
Yes
7A3h
Internal Temperature Sen-
sor Error
An error occurred in the temperature sensor cir-
cuit.
Gr.2
No
7A4h
Power Transistor Over-
heated (Abnormal power
transistor temperature.)
The temperature of the power transistor is abnor-
mal.
Gr.2
No
7Abh
SERVOPACK Built-in Fan
Stopped
The fan inside the SERVOPACK stopped.
Gr.1
Yes
810h
Encoder Backup Alarm
The power supplies to the encoder all failed and
the position data was lost.
Gr.1
No
820h
Encoder Checksum Alarm
There is an error in the checksum results for
encoder memory.
Gr.1
No
830h
Encoder Battery Alarm
The battery voltage was lower than the specified
level after the control power supply was turned
ON.
Gr.1
Yes
840h
Encoder Data Alarm
There is an internal data error in the encoder.
Gr.1
No
850h
Encoder Overspeed
The encoder was operating at high speed when
the power was turned ON.
Gr.1
No
860h
Encoder Overheated
The internal temperature of encoder is too high.
Gr.1
No
861h
Motor Overheated
The internal temperature of motor is too high.
Gr.1
No
862h
Overheat Alarm
The input voltage (temperature) for the overheat
protection input (TH) signal exceeded the setting
of Pn61B (261Bh) (Overheat Alarm Level).
Gr.1
Yes
890h
Encoder Scale Error
A failure occurred in the linear encoder.
Gr.1
No
891h
Encoder Module Error
An error occurred in the linear encoder.
Gr.1
No
8A0h
*2
External Encoder Error
An error occurred in the external encoder.
Gr.1
Yes
8A1h
*2
External Encoder Module
Error
An error occurred in the Serial Converter Unit.
Gr.1
Yes
8A2h
*2
External Incremental
Encoder Sensor Error
An error occurred in the external encoder.
Gr.1
Yes
8A3h
*2
External Absolute Encoder
Position Error
An error occurred in the position data of the
external encoder.
Gr.1
Yes
Continued on next page.
Continued from previous page.
Alarm
Code
Alarm Name
Alarm Meaning
Servo-
motor
Stop-
ping
Method
Alarm
Reset
Possi-
ble?