what is this RLO?

OwwBit

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Join Date
Jul 2016
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In seamen what is RLO again 'RLO' ?
I found this in a book but unable to understand so i need your help.

Thanks and Any Help Appreciated.
 
RLO stands for Result of Logic Operation. In monitoring Ladder logic, it is the rung status. In STL, it is the value after the instructions you've executed so far; the logical sum of the current instruction and all the instructions prior.
 

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