Okuma Alarm A-8680 – Area Sensor Interlock
Alarm A-8680 indicates that a safety interlock related to the door area sensor has been activated.
The area sensor (light curtain or presence sensor) monitors the machine door area to prevent operation when a person or object is detected inside the protected zone. This alarm occurs when an operation that is prohibited under active area sensor conditions is attempted while the sensor beam is interrupted (shaded).
In simple terms:
The machine tried to perform a restricted action while the safety area sensor was blocked.
When this alarm appears:
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The area sensor beam is interrupted
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The door safety zone is not clear
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Restricted machine operations are automatically inhibited
Typical causes include:
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Operator standing in the sensor field
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Object blocking the light curtain
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Misaligned or dirty sensor
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Wiring issue in the safety circuit
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Incorrect safety parameter configuration
Restricted operations may include:
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Automatic cycle start
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Axis movement at production speed
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Spindle start
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Tool change
Recommended actions:
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Ensure no person or object is inside the protected area.
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Check alignment of the area sensor beams.
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Clean sensor lenses if necessary.
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Inspect safety wiring and connectors.
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Verify safety parameter settings.
This alarm is a safety protection feature and prevents machine operation to avoid potential injury or equipment damage.
