
5.2 Error Diagnosis and Troubleshooting
— 5-7 —
Cause
Remedy
A
•
Servomotor wiring incorrect.
•
Encoder wiring incorrect (disconnection,
short circuit, power supply, etc.)
Check and correct wiring. (Check phase-A,
-B, -C pulses correct at CN2.)
B
Incremental encoder power not supplied
from Servopack.
Use the Servopack power supply for the
encoder.
C
Noise in encoder wiring.
Separate encoder wiring from main wiring
circuits.
D
Circuit board (1PWB) defective
Replace Servopack.
6. A.70
Display and Outputs
Digital Operator Display
Alarm Name
Alarm Output
A.70
Overload
Output transistor is OFF
(alarm state)
Status when Alarm Occurred
B
,
C
, D
When speed reference
is input
No Servomotor
rotation
During normal
operation
At power ON
D
, E
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 load moment of
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.
7. A.80
Display and Outputs
Digital Operator Display
Alarm Name
Alarm Output
A.80
Encoder error
Output transistor is OFF
(alarm state)
5
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