8.1 Alarm Displays
8-3
8
Trou
blesh
ooting
A.100
*
Overcurrent or Heat Sink
Overheated
An overcurrent flowed through the IGBT or the heat sink of the
SERVOPACK was overheated.
Gr.1
N/A
A.150
Motor Winding Current Un-
balance
The currents in the motor windings are not correct.
Gr.1
Available
A.300
Regeneration Error
Regenerative circuit or regenerative resistor is faulty.
Gr.1
Available
A.320
Regenerative Overload
Regenerative energy exceeds regenerative resistor 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
A.410
*
Undervoltage
Main circuit DC voltage is excessively low.
Gr.2
Available
A.42A
Converter error
One of the following was detected by the converter.
• An operation error occurred when using the limit relay for inrush
current
• PN voltage error
• Regeneration operation error
• The converter’s heat sink overheated
• An operation error occurred when using the converter and fan
Gr.1
Available
A.450
*
Main-Circuit
Capacitor Overvoltage
The capacitor of the main circuit has deteriorated or is faulty.
Gr.1
N/A
A.510
Overspeed
The servomotor speed is above the maximum rotational speed.
Gr.1
Available
A.511
Overspeed of Encoder
Output Pulse Rate
The pulse output speed upper limit of the set encoder output pulse
(Pn212) is exceeded.
Gr.1
Available
A.520
Vibration Alarm
Incorrect vibration at the motor speed was detected.
Gr.1
Available
A.710
Overload: High Load
The servomotor was operating for several seconds to several tens of
seconds under a torque largely exceeding ratings.
Gr.2
Available
A.720
Overload: Low Load
The servomotor was operating continuously under a torque exceed-
ing ratings.
Gr.1
Available
A.730
*
A.731
Dynamic Brake Overload
When the dynamic brake was applied, rotational 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 exceeded 100°C.
Gr.2
Available
A.7AB
*
Built-in Fan in
SERVOPACK Stopped
The fan inside the SERVOPACK stopped.
Gr.1
Available
A.810
Encoder Backup Error
The power supplies to the encoder all failed and position data was
lost.
Gr.1
N/A
A.820
Encoder Checksum Error
The checksum results of encoder memory is incorrect.
Gr.1
N/A
A.830
Absolute Encoder Battery
Error
The battery voltage was lower than the specified value after the con-
trol power supply was turned ON.
Gr.1
Available
A.840
Encoder Data Error
Data in the encoder is incorrect.
Gr.1
N/A
A.850
Encoder Overspeed
The encoder was rotating at high speed when the control power sup-
ply was turned ON.
Gr.1
N/A
A.860
Encoder Overheated
The internal temperature of encoder is too high.
Gr.1
N/A
A.b31
*
Current Detection Error 1
The current detection circuit for phase U is faulty.
Gr.1
N/A
A.b32
*
Current Detection Error 2
The current detection circuit for phase V is faulty.
Gr.1
N/A
A.b33
*
Current Detection Error 3
The detection circuit for the current is faulty.
Gr.1
N/A
A.b6A
MECHATROLINK
Communications
ASIC Error 1
ASIC error occurred in the MECHATROLINK communications.
Gr.1
N/A
(cont’d)
Alarm
Number
Alarm Name
Meaning
Servomotor
Stopping
Method
Alarm
Reset