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Sigma II User's Manual
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A.71
A.71: Overload: High Load
The alarm output, status, and remedy for A.71 are the same as for A.72.
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A.72
A.72: Overload: Low Load. (See the following page for details).
Display and Outputs
Status and Remedy for Alarm
When Servo ON (S-ON)
signal is turned ON.
When speed reference
is entered.
Incorrect or disconnected servomotor
A
wiring.
B
Load greatly exceeds rated torque.
C
Defective circuit board (1PWB).
Alarm Outputs
Alarm Code Output
ALO1
ALO2
ON
ON
Note:
OFF:
Output transistor is OFF (alarm state).
ON:
Output transistor is ON.
A
No servomotor
rotation.
B
During servomotor
B
operation.
Cause of the Problem
Chapter 9: Inspection, Maintenance, and Troubleshooting
ALM Output
ALO3
ON
OFF
At power ON.
Solution
Check wiring and connectors at the
servomotor.
Reduce load torque and inertia. Oth-
erwise, replace with a larger capacity
servomotor.
Replace servo amplifier.
9-14
C
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