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Sigma II User's Manual
n
A.74
A.74: Overload of Surge Current Limit Resistor
Display and Outputs
Status and Remedy for Alarm
When main circuit power
is turned ON or OFF.
Frequently turning the main circuit
A
power ON/OFF.
B
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
Cause of the Problem
Chapter 9: Inspection, Maintenance, and Troubleshooting
ALM Output
ALO3
ON
OFF
At power ON.
Solution
Do not repeatedly turn ON/OFF the
main circuit power.
Replace servo amplifier.
9-17
B
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