Yaskawa Sigma II Series Servo System - Manual (Page 428)

Sigma II User’s Manual Chapter 9: Inspection, Maintenance, and Troubleshooting
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9.2.3 Alarm Display Table
A summary of alarm displays and alarm code outputs is given in the following table.
Alarm Display Table
*1 These alarms are not reset by the alarm reset signal (/ALM-RST). Eliminate the cause of
the alarm and then turn OFF the power supply to reset the alarms.
2)
This alarm display appears only within the range of 30W to 1kW.
Notes: OFF: Output transistor is OFF.
ON:
Output transistor is ON.
Alarm
Display
Alarm Code Output
ALM
Output
Alarm Name Description
ALO1 ALO2 ALO3
A.02
OFF OFF OFF OFF
Parameter Breakdown *1
EEPROM data of servo amplifier
is abnormal.
A.03
Main Circuit Detection
Error
Detection data for power circuit
is abnormal.
A.04 Parameter Setting Error *1
The parameter setting is outside
the allowable setting range.
A.05
Servomotor and Amplifier
Combination Error
Servo amplifier and servomotor
capacities do not match each
other.
A.10 ON OFF OFF OFF
Overcurrent or Heat Sink
Overheated
**
An overcurrent flowed through
the IGBT.
Heat sink of servo amplifier was
overheated.
A.30
ON ON OFF OFF
Regeneration Error
Detected
• Regenerative circuit is faulty
• Regenerative resistor is faulty.
A.32 Regenerative Overload
Regenerative energy exceeds
regenerative resistor capacity.
A.40
OFF OFF ON OFF
Overvoltage
Main circuit DC voltage is
excessively high.
A.41 Undervoltage
Main circuit DC voltage is
excessively low.
A.51 ON OFF ON OFF Overspeed
Rotational speed of the motor is
excessively high.
A.71
ON ON ON OFF
Overload: High Load
The motor was operating for
several seconds to several tens
of seconds under a torque
largely exceeding ratings.
A.72 Overload: Low Load
The motor was operating
continuously under a torque
exceeding ratings
A.73 Dynamic Brake Overload
When the dynamic brake was
applied, rotational energy
exceeded the capacity of
dynamic brake resistor.
A.74
Overload of Surge
Current Limit Resistor
The main circuit power was
frequently turned ON and OFF.
A.7A Heat Sink Overheated 2)
The heat sink of servo amplifier
overheated.