YASKAWA SGM series User Manual page 373

Display and Outputs
Digital Operator g p
Di Display and l d
Alarm Name Alarm Name
ALO1
A.C4
ON
Encoder C-phase
discontinuity
Status When Alarm Occurred
At power ON
User constant
Cn-01 Bit 0 = 0
Occurred 1 to 3 seconds
after power ON
User constant
Cn-01 Bit 0 = 1
Cause
A Encoder wiring incorrect or poor
connection
B Noise in encoder wiring.
C Encoder defective
D Circuit board (1PWB) defective
Alarm Output
Alarm Code Output
ALO2
OFF ON
When servo ON (S-ON)
signal turned ON
During servomotor
C
operation
A
, B, C, D
Check wiring and connectors at encoder.
Separate encoder wiring from main wiring
circuits.
Replace servomotor.
Replace Servopack.
6.2 Troubleshooting
Alarm Output p
ALO3
OFF
OFF: Output transistor is OFF
ON: Output transistor is ON
A
, B, C, D
A, B, C, D
Remedy
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