3.5 FT83 SERVOPACKs with Analog Voltage/Pulse Train References
3.5.2 List of Alarms
3
Maintenance
3-207
A.710
Instantaneous Over-
load
The Servomotor was operating for several
seconds to several tens of seconds under
a torque that largely exceeded the rating.
Gr.2
Yes
L
L
L
A.720
Continuous Overload
The Servomotor was operating continu-
ously under a torque that exceeded the
rating.
Gr.1
Yes
A.730
Dynamic Brake Over-
load
When the dynamic brake was applied,
the rotational or linear kinetic energy
exceeded the capacity of the dynamic
brake resistor.
Gr.1
Yes
A.731
A.740
Inrush Current Limit-
ing Resistor Overload
The main circuit power supply was fre-
quently turned ON and OFF.
Gr.1
Yes
A.7A1
Internal Temperature
Error 1 (Control Board
Temperature Error)
The surrounding temperature of the con-
trol PCB is abnormal.
Gr.2
Yes
A.7A2
Internal Temperature
Error 2 (Power Board
Temperature Error)
The surrounding temperature of the
power PCB is abnormal.
Gr.2
Yes
A.7A3
Internal Temperature
Sensor Error
An error occurred in the temperature sen-
sor circuit.
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
H
H
H
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
A.862
Overheat Alarm
The input voltage (temperature) for the
overheat protection input (TH) signal
exceeded the setting of Pn61B (Overheat
Alarm Level).
Gr.1
Yes
A.8A0
External Encoder
Error
An error occurred in the external encoder.
Gr.1
Yes
A.8A1
External Encoder
Module Error
An error occurred in the Serial Converter
Unit.
Gr.1
Yes
A.8A2
External Incremental
Encoder Sensor Error
An error occurred in the external encoder.
Gr.1
Yes
A.8A3
External Absolute
Encoder Position
Error
An error occurred in the position data of
the external encoder.
Gr.1
Yes
A.8A5
External Encoder
Overspeed
An overspeed error occurred in the exter-
nal encoder.
Gr.1
Yes
A.8A6
External Encoder
Overheated
An overheating error occurred in the
external encoder.
Gr.1
Yes
Continued on next page.
Continued from previous page.
Alarm
Number
Alarm Name
Alarm Meaning
Servo-
motor
Stop-
ping
Method
Alarm
Reset
Possi-
ble?
Alarm Code Output
/ALO1 /ALO2 /ALO3