12.2 Alarm Displays
12.2.1 List of Alarms
12-6
A.042
Parameter Combination
Error
The combination of some parameters exceeds
the setting range.
Gr.1 No
A.044
Semi-Closed/Fully-Closed
Loop Control Parameter
Setting Error
The settings of the Option Module and Pn002 =
n.X (External Encoder Usage) do not
match.
Gr.1 No
A.04A Parameter Setting Error 2
There is an error in the bank members or bank
data settings.
Gr.1 No
A.050 Combination Error
The capacities of the SERVOPACK and Servomo-
tor do not match.
Gr.1 Yes
A.051
Unsupported Device
Alarm
An unsupported device was connected. Gr.1 No
A.070
Motor Type Change
Detected
The connected motor is a different type of motor
from the previously connected motor.
Gr.1 No
A.080
Linear Encoder Pitch Set-
ting Error
The setting of Pn282 (Linear Encoder Scale Pitch)
has not been changed from the default setting.
Gr.1 No
A.0b0
Invalid Servo ON Com-
mand Alarm
The SV_ON (Servo ON) command was sent from
the host controller after a utility function that turns
ON the Servomotor was executed.
Gr.1 Yes
A.100 Overcurrent Detected
An overcurrent flowed through the power transis-
tor 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
• Rotary Servomotor: The pulse output speed for
the setting of Pn212 (Number of Encoder Out-
put Pulses) was exceeded.
• Linear Servomotor: The motor speed upper
limit for the setting of Pn281 (Encoder Output
Resolution) 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
Continued on next page.
Continued from previous page.
Alarm
Number
Alarm Name Alarm Meaning
Servo-
motor
Stop-
ping
Method
Alarm
Reset
Possi-
ble?
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