INSPECTION AND MAINTENANCE
5.2.1 Troubleshooting Problems with Alarm Display
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Status when Alarm Occurred
B
,
D
At power ON
During Servomotor
operation
A
,
B
,
C
Cause
Remedy
A
Servopack miscounted pulses or
malfunctioned due to noise.
Separate encoder wiring from main wiring
circuits turn ON Servopack power again.
B
Incorrect encoder wiring or poor
connection.
Check the encoder wiring and connectors
at encoder.
C
Encoder malfunctioned.
Replace Servopack.
D
Circuit board (1PWB) defective.
Replace Servopack.
8. A.b1
Display and Outputs
Digital Operator Display
Alarm Name
Alarm Output
A.b1
Reference input read error (for
speed/torque control only)
Output transistor is OFF
(alarm state)
Status when Alarm Occurred
A
,
B
During Servomotor
operation
At 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.
9. A.C1
Display and Outputs
Digital Operator Display
Alarm Name
Alarm Output
A.C1
Servo overrun
Output transistor is OFF
(alarm state)
5
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