logical operators are, by definition, binary or unitary. The classical definitions are AND, OR and NOT, sometimes expanded to XOR (as done by Jeti).
AND requires both values need to be true, i.e. TRUE AND TRUE returns TRUE, and all other combinations return FALSE
OR requires only one value to be true, i..e. FALSE OR FALSE returns FALSE, and all other combinations return TRUE
NOT negates the value, i.e. NOT TRUE is FALSE
XOR requires only one value to be true, i.e. TRUE XOR TRUE will return FALSE, as it would do FALSE XOR FALSE.
to combine different logical operators, what you need to do is combine the result of one logical condition with a second logical condition. As an example:
let's assume you want a condition where Sa, Sb, Sc and Sd are all TRUE: then you need to configure L1 is Sa AND Sb, if you want to combine with Sc, then L2 as L1 AND Sc, and then L3 as L2 AND Sd.
Hope it helps.
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