YASKAWA SGM-A3 - Page 415

6.2 Troubleshooting
403
Status When Alarm Occurred
A
,
B
During servomotor
operation
At control power ON
C
Cause Remedy
A Part malfunctioned in reference read-in unit
(A/D converter, etc.).
Reset alarm and restart operation.
B Part defective in reference read-in unit
(A/D converter, etc.).
Replace Servopack.
C Circuit board (1PWB) defective Replace Servopack.
D Display and Outputs
Digital Operator
Di l
d
Alarm Output
g
p
Display and
Alarm
Name
Alarm Code Output
Alarm Output
Al
arm
N
ame
ALO1 ALO2 ALO3
p
A.C1
Servo overrun
ON OFF ON OFF
OFF: Output transistor is OFF
ON: Output transistor is ON
Status When Alarm Occurred
E
At control power ON
User constant
Cn-01 Bit 0 = 0
When servo ON (S-ON)
signal turned ON
A
,
B
,C,D,E
On speed reference input
A
,
B
,C,D,E
A
,
B
,C,D,E
Occurred 1 to 3 se-
conds after power ON
User constant
Cn-01 Bit 0 = 1
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 Incremental encoder power not supplied
from Servopack.
Use the Servopack power supply for the
encoder.
D Encoder defective Replace servomotor.
E Circuit board (1PWB) defective Replace Servopack.
6