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Why does the RDY led on my STBACO0220 Advantys module blink 3 times then pauses and repeats this pattern ?

This flash pattern is typically seen when there are Reflex Actions configured. When a reflex block is in error or is not running because all its inputs have not been received, the green RDY LED on the action module will blink in a special pattern; three blinks followed by a pause, repeatedly until the condition is cleared.

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