YASKAWA SGM-A3 User Manual page 415

Status When Alarm Occurred
During servomotor
operation
Cause
A Part malfunctioned in reference read-in unit
(A/D converter, etc.).
B Part defective in reference read-in unit
(A/D converter, etc.).
C Circuit board (1PWB) defective
D Display and Outputs
Digital Operator g p
Di Display and l d
Alarm Name Alarm Name
ALO1
A.C1
ON
Servo overrun
Status When Alarm Occurred
At control power ON
User constant
Cn-01 Bit 0 = 0
Occurred 1 to 3 se-
conds after power ON
User constant
Cn-01 Bit 0 = 1
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
At control power ON
A B
,
Reset alarm and restart operation.
Replace Servopack.
Replace Servopack.
Alarm Output
Alarm Code Output
ALO2
OFF
When servo ON (S-ON)
signal turned ON
On speed reference input
E
A B
, , C, D, E
Check wiring and connectors at
servomotor.
Check wiring and connectors at encoder.
Use the Servopack power supply for the
encoder.
Replace servomotor.
Replace Servopack.
6.2 Troubleshooting
C
Remedy
Alarm Output
ALO3
ON OFF
OFF: Output transistor is OFF
ON: Output transistor is ON
A B
, , C, D, E
A B
, , C, D, E
Remedy
p
6
403