YASKAWA SGM series User Manual page 371
Ac servomotors and drivers
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Also See for SGM series:
- User manual (275 pages) ,
- Safety precautions (35 pages) ,
- Manual (196 pages)
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Cause
A
Servomotor wiring incorrect or
disconnected
B
Encoder wiring incorrect or disconnected
C
Incremental encoder power not supplied
from Servopack.
D
Encoder defective
E
Circuit board (1PWB) defective
Display and Outputs
Digital Operator
g
p
Display and
Di
l
d
Alarm Name
Alarm Name
ALO1
A.C2
ON
Encoder phase
detection error
Status When Alarm Occurred
At power ON
Occurred 1 to 3 seconds
after power ON
Cause
A
Noise in encoder wiring.
B
Encoder wiring incorrect or poor
connection
C
Encoder defective
D
Circuit board (1PWB) defective
Check wiring and connectors at
servomotor.
Check wiring and connectors at encoder.
Use the Servopack power supply for the
encoder.
Replace servomotor.
Replace Servopack.
Alarm Output
Alarm Code Output
ALO2
OFF
ON
During servomotor
D
operation
A
B
C
,
,
, D
Separate encoder wiring from main wiring
circuits.
Check wiring and connectors at encoder.
Replace servomotor.
Replace Servopack.
6.2 Troubleshooting
Remedy
Alarm Output
p
ALO3
OFF
OFF: Output transistor is OFF
ON: Output transistor is ON
A
B
C
,
,
, D
Remedy
361
6
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Troubleshooting
