Sigma II User’s Manual Chapter 9: Inspection, Maintenance, and Troubleshooting
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A.74
A.74: Overload of Surge Current Limit Resistor
Display and Outputs
Note: OFF: Output transistor is OFF (alarm state).
ON: Output transistor is ON.
Status and Remedy for Alarm
Alarm Outputs
Alarm Code Output
ALM Output
ALO1 ALO2 ALO3
ON ON ON OFF
Cause of the Problem Solution
A
Frequently turning the main circuit
power ON/OFF.
Do not repeatedly turn ON/OFF
the main circuit power.
B Defective circuit board (1PWB). Replace servo amplifier.
When main circuit power
is turned ON or OFF.
At power ON.
A B
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