Each complete horizontal line of a ladder logic program is generally referred to as a rung10/30/2023 ![]() ![]() ![]() OR C 1 1 ! Logical OR of C with ACCumulator Your code, for example, becomes: A B XĪND B 0 0 ! Logical AND of B with ACCumulator ![]() The text version gives a better clue as to the execution. ![]() Allen-Bradley does in that you can edit a rung of ladder with a text editor and I've used this function to create ladder logic in Excel (incrementing inputs and outputs by formula) and pasting the results back into the ladder editor. In the old days many of the PLCs programmers could switch between ladder and text or 'op-codes' (I can't remember the correct terminology). You are correct in your execution sequence and your statement that a rung can be several lines.
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