RTO Timer on Arduino Opta (Retentive Timer) - PLC IDE - Arduino Forum
Allen Bradley System already has a function block for this. for a retentive timer that will resume counting form where it left off when the input goes true again. Ive tried to create one manually but normally you would need a ONS input which Im not sure how to replicate on the Opta as the Mov function to move the stored UDT back into the ET . . .
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