YASKAWA SGDS Sigma III Series User Manual page 305

10 Inspection, Maintenance, and Troubleshooting
10.1.4 Troubleshooting of Alarm and Warning
Alarm
Alarm Name
Display
A.860
Encoder
Overheated
A.870 Fully-closed
Serial Encoder
Checksum
Alarm
A.880
Fully-closed
Serial Encoder
Data Alarm
A.8A0
Fully-closed
Serial Encoder
Scale Error
A.8A1 Fully-closed
Serial Encoder
Module Error
A.8A2
Fully-closed
Serial Encoder
Sensor Error
(Incremental)
A.b31 Current
Detection Error
1
A.b32
Current
Detection Error
2
A.b33
Current
Detection Error
3
10-14
Table 10.3 Alarm Display and Troubleshooting (Cont'd)
Situation at Alarm
Occurrence
Occurred when the An encoder fault occurred.
control power
A SERVOPACK board fault occurred.
supply was turned
ON.
Occurred during The ambient temperature around the servomotor is
operation. too high.
The servomotor load is greater than the rated load.
An encoder fault occurred.
A SERVOPACK board fault occurred.
Occurred when the A serial converter unit fault occurred and was
control power detected by self-diagnosis of serial converter unit.
supply was turned
ON or during
A SERVOPACK fault occurred.
operation.
Occurred when A serial converter unit fault occurred and was
Sensor ON detected by self-diagnosis of serial converter unit.
(SENS_ON)
command was
issued.
Occurred when the A serial converter unit malfunctioned.
control power
supply was turned
ON.
A SERVOPACK fault occurred.
Occurred during A serial converter unit malfunctioned.
operation.
A serial converter unit fault occurred.
A SERVOPACK fault occurred.
Occurred when the A linear encoder fault occurred.
control power
supply was turned
ON or during
operation.
Occurred when the A linear encoder fault occurred.
control power
A scale converter unit fault occurred.
supply was turned
ON or during
operation.
Occurred when the A linear encoder fault occurred.
control power
supply was turned
ON or during
operation.
Occurred when the The current detection circuit for the Phase U is
control power faulty.
supply was turned
ON or during
The current detection circuit for the Phase V is
operation.
faulty.
The detection circuit for the power supply is faulty.
The servomotor cable is disconnected.
Cause
Replace the servomotor.
Replace the SERVOPACK.
The ambient temperature must be 40
The servomotor load must be within the specified
range.
Replace the servomotor.
Replace the SERVOPACK.
Set up the serial converter unit. If this alarm
occurs frequently, replace the serial converter
unit.
Replace the SERVOPACK.
Set up the serial converter unit. If this alarm
occurs frequently, replace the serial converter
unit.
Turn the SERVOPACK and serial converter unit
power supplies OFF and then ON again. If this
alarm occurs frequently, replace the serial
converter unit.
Replace the SERVOPACK.
Turn the SERVOPACK and serial converter unit
power supplies OFF and then ON again. If this
alarm occurs frequently, replace the serial
converter unit.
Replace the serial converter unit.
Replace the SERVOPACK.
Replace the linear encoder.
Replace the linear encoder.
Replace the serial converter unit.
Replace the linear encoder.
Replace the SERVOPACK.
Replace the SERVOPACK.
Check the motor wiring.
Corrective Actions
°C
or less.