Yaskawa SGDB - Manual (Page 520)

6.2 Troubleshooting
511
J A.71, A.72
Display and Outputs
Digital Operator
Di l d
Alarm Output g p
Display and
Alarm Name
Alarm Code Output Alarm Output
Alarm Name
ALO1 ALO2 ALO3
p
A.71
Overload
(High load)
A.72
Overload
(Low load)
ON ON ON OFF
OFF: Output transistor is OFF
ON: Output transistor is ON
Status When Alarm Occurred
B , C , D
When speed reference
input
No servomotor
rotation
During normal
operation
At power ON
C
, D
E
When servo ON (/S-ON)
signal turned ON
A
,
B
, D
Cause Remedy
A Servomotor wiring incorrect or
disconnected
Check wiring and connectors at
servomotor.
B Encoder wiring incorrect or disconnected Check wiring and connectors at encoder.
C Load greatly exceeds rated torque Reduce load torque and inertia. Otherwise,
replace with larger capacity servomotor.
D Incremental encoder power not supplied
from SERVOPACK.
Use the SERVOPACK power supply for
the encoder.
E Circuit board (1PWB) defective Replace SERVOPACK.
6