9 Inspection, Maintenance, and Troubleshooting
9.1.1 Alarm Display Table
9-2
9.1 Troubleshooting
9.1.1 Alarm Display Table
A summary of alarm displays is given in Table 9.1.
If an alarm occurs, the servomotor can be stopped by doing either of the following operations.
• DB STOP: Stops the servomotor immediately using the dynamic brake.
• ZERO-SPEED STOP: Stops the servomotor by setting the speed reference to “0.”
Table 9.1 Alarm Display Table
Alarm
Display
Alarm Name
Meaning
Servomotor
Stop Method
Alarm
Reset
Servo
Alarm
(ALM)
Output
A.020
Parameter Checksum Error
EEPROM data of SERVOPACK is incorrect.
DB stop
N/A
H
A.021
Parameter Format Error
Parameter data of SERVOPACK is incorrect.
DB stop
N/A
A.022
System Checksum Error
Parameter data of SERVOPACK is incorrect.
DB stop
N/A
A.023
Parameter Password Error
Parameter data of SERVOPACK is incorrect.
DB stop
N/A
A.030
Main Circuit Detector Error
Detection data for power circuit is incorrect.
DB stop
Available
A.040
Parameter Setting Error
The parameter setting is outside the allowable
setting range.
DB stop
N/A
A.042
Parameter Combination Error
Combination of some parameters exceeds the
setting range.
DB stop
N/A
A.050
Combination Error
SERVOPACK and servomotor capacities do
not match each other.
DB stop
Available
A.051
Unsupported Product Alarm
The serial converter unit unsupported was con-
nected.
DB stop
N/A
A.0b0
Servo ON reference Invalid Alarm
The Host controller reference was sent to turn
the Servo ON after the Servo ON function was
used with the Digital Operator or S.
DB stop
Available
A.100
Overcurrent or Heat Sink
Overheated
An overcurrent flowed through the IGBT.
Heat sink of SERVOPACK was overheated.
DB stop
N/A
A.300
Regeneration Error Detected
Regenerative circuit or regenerative resistor is
faulty.
DB stop
Available
A.320
Regenerative Overload
Regenerative energy exceeds regenerative
resistor capacity.
DB stop
Available
A.330
Main Circuit Power Supply Wiring
Error
The power supply to the main circuit does not
match the parameter Pn001 setting.
DB stop
Available
A.400
Overvoltage
Main circuit DC voltage is excessively high.
DB stop
Available
A.410
Undervoltage
Main circuit DC voltage is insufficiently low.
DB stop
Available
A.510
Overspeed
Rotational speed of the motor is excessively
high.
DB stop
Available
A.710
Overload: High Load
The motor was operating for several seconds
to several tens of seconds under a torque
largely exceeding ratings.
DB stop
Available
A.720
Overload: Low Load
The motor was operating continuously under a
torque largely exceeding ratings.
DB stop
Available
A.730
Dynamic Brake Overload
When the dynamic brake was applied, rota-
tional energy exceeded the capacity of
dynamic brake resistor.
DB stop
Available
A.740
Overload of Surge Current Limit
Resistor
The main circuit power was frequently turned
ON and OFF.
DB stop
Available
A.7A0
Heat Sink Overheated
The heat sink of SERVOPACK overheated.
DB stop
Available
A.810
Encoder Backup Error
All the power supplies for the absolute encoder
have failed and position data was cleared.
DB stop
N/A
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