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3.1 FT82 SERVOPACKs with Analog Voltage/Pulse Train References
3.1.2 List of Alarms
3
Maintenance
3-5
A.550
Maximum Speed Setting
Error
The setting of Pn385 (Maxi-
mum Motor Speed) is greater
than the maximum motor
speed.
Gr.1
Yes
L
H
L
A.710
Instantaneous Overload
The Servomotor was operat-
ing 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 operat-
ing continuously under a
torque that exceeded the rat-
ing.
Gr.1
Yes
L
L
L
A.730
Dynamic Brake Overload
When the dynamic brake was
applied, the rotational or lin-
ear kinetic energy exceeded
the capacity of the dynamic
brake resistor.
Gr.1
Yes
L
L
L
A.731
A.740
Inrush Current Limiting
Resistor Overload
The main circuit power sup-
ply was frequently turned ON
and OFF.
Gr.1
Yes
L
L
L
A.7A1
Internal Temperature Error
1 (Control Board Tempera-
ture Error)
The surrounding tempera-
ture of the control PCB is
abnormal.
Gr.2
Yes
L
L
L
A.7A2
Internal Temperature Error
2 (Power Board Tempera-
ture Error)
The surrounding tempera-
ture of the power PCB is
abnormal.
Gr.2
Yes
L
L
L
A.7A3
Internal Temperature Sen-
sor Error
An error occurred in the tem-
perature sensor circuit.
Gr.2
No
L
L
L
A.7Ab
SERVOPACK Built-in Fan
Stopped
The fan inside the SERVO-
PACK stopped.
Gr.1
Yes
L
L
L
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
H
H
H
A.830
Encoder Battery Alarm
The battery voltage was
lower than the specified level
after the control power sup-
ply was turned ON.
Gr.1
Yes
H
H
H
A.840
Encoder Data Alarm
There is an internal data error
in the encoder.
Gr.1
No
H
H
H
A.850
Encoder Overspeed
The encoder was operating
at high speed when the
power was turned ON.
Gr.1
No
H
H
H
A.860
Encoder Overheated
The internal temperature of
the rotary encoder or linear
encoder is too high.
Gr.1
No
H
H
H
A.861
Motor Overheated
The internal temperature of
motor is too high.
Gr.1
No
H
H
H
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