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9.1 Alarm Displays
9-3
A.300 Regeneration Error
Regenerative circuit or r
egenerative resistor
is faulty.
Gr.1 Available
L L
H
A.320 Regenerative Overload
Regenerative energy exceeds regenerative
re
sistor capacity.
Gr.2
Available
A.330
Main Circuit Power
Supply Wiring Error
• Setting of AC input/DC input is incorrect.
• Power supply wiring is incorrect.
Gr.1
Available
A.400 Overvoltage
Main circuit DC voltage is
excessively
high.
Gr.1 Available
H H
LA.410 Undervoltage Main circuit DC voltage is excessively low. Gr.2 Available
A.450
Main-Circuit
Capacitor Overvoltage
The capacitor of the main circuit has deteri-
orated or is faulty.
Gr.1 N/A
A.510 Overspeed
The servomotor speed is above the maxi-
mum speed.
Gr.1 Available
L H
L
A.511
Overspeed of Encoder
Output Pulse Rate
The motor speed upper limit of the set
en
coder output resolution (Pn281) is
exceeded.
Gr.1
Available
A.520 Vibration Alarm
Incorrect vibration at the motor speed was
detected.
Gr.1 Available
A.521 Autotuning Alarm
Vibration was detected while performing
tun
ing-less function.
Gr.1
Available
A.550
Maximum Speed Setting
Error
The Pn385 setting is greater than the maxi-
mum speed.
Gr.1
Available
A.710 Overload: High Load
The servomotor was opera
ting for several
seconds to several tens of seconds under a
force largely exceeding ratings.
Gr.2 Available
L L
L
A.720 Overload: Low Load
The servomotor was operatin
g continuously
under a force exceeding ratings.
Gr.1
Available
A.730
A.731
Dynamic Brake Overload
When the dynamic brake was applied, mov-
ing energy exceeded the capacity of
dynamic brake
resistor.
Gr.1 Available
A.740
Overload of Surge
Current Limit Resistor
The main circuit power was frequently
turned ON
and OFF.
Gr.1
Available
A.7A0 Heat Sink Overheated
The heat sink of the SERVOPACK
ex
ceeded 100C.
Gr.2
Available
A.7AB
Built-in Fan in
SERVOPACK Stopped
The fan inside the SERVOPACK stopped. Gr.1 Available
A.820 Encoder Checksum Error
The checksum results of linear scale mem-
ory is incorrect.
Gr.1 N/A
H H
H
A.840 Encoder Data Error Data in the linear scale is incorrect. Gr.1 N/A
A.850 Encoder Overspeed
The linear scale was moving at high speed
when the power was turned ON.
Gr.1 N/A
A.860 Encoder Overheated
The internal temperature of linear scale is
too
high.
Gr.1
N/A
A.890 Encoder Scale Error A linear scale fault occurred Gr.1 N/A
A.891 Encoder Module Error Linear scale is faulty. Gr.1 N/A
A.A
*1
SERVOPACK: Command
Option Module Alarms
These alarms occur in SERVOPACKs with command option modules.
For details, refer to the manual for the command option module that is connected.
(cont’d)
Alarm
Number
Alarm Name Meaning
Servo-
motor
Stopping
Method
Alarm
Reset
Alarm Code Output
ALO1 ALO2 ALO3
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