Yaskawa Sigma-5 User Manual: Design and Maintenance - Rotary Motors - Analog Voltage and Pulse Train Reference - Manual (Page 350)

10.1 Alarm Displays
10-3
10
Trou
blesh
ooting
A.300 Regeneration Error
Regenerative circuit or regenerative resistor
is faulty.
Gr.1 Available
L L H 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
H H L A.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 rotational speed.
Gr.1 Available
L H L
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.521 Autotuning Alarm
Vibration was detected while performing
tuning-less function.
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
L L L
A.720 Overload: Low Load
The servomotor was operating continuously
under a torque exceeding ratings.
Gr.1 Available
A.730
A.731
Dynamic Brake Overload
When the dynamic brake was applied, rota-
tional 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
H H H
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 control power sup-
ply 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 power was turned ON.
Gr.1 N/A
A.860 Encoder Overheated
The internal temperature of encoder is too
high.
Gr.1 N/A
A.8A0 External Encoder Error External encoder is faulty. Gr.1 Available
A.8A1
External Encoder Error of
Module
Serial converter unit is faulty. Gr.1 Available
A.8A2
External Encoder Error of
Sensor
External encoder is faulty. Gr.1 Available
(cont’d)
Alarm
Number
Alarm Name Meaning
Servo-
motor
Stop-
ping
Method
Alarm
Reset
Alarm Code Output
ALO1 ALO2 ALO3