Leli bhokisi elingangeni manzi le-1Way, elihambisana nenkinobho yokucindezela eyisicaba engu-1NO+1NC, liwumkhiqizo wekhwalithi ephezulu owenzelwe ukulawula isekethe ezindaweni ezinzima. Ukusebenza kwalo okuhle kakhulu okungangeni manzi kanye nomklamo wokuvala wobungcweti ukumelana ngempumelelo nezimo ezinzima njengomswakama namanzi, okuqinisekisa ukusebenza okuthembekile ngisho nasezindaweni zokusebenzela zezimboni ezimanzi, zangaphandle noma ezinomswakama.
Inkinobho yokusunduza eyisicaba kulula kakhulu ukuyisebenzisa, inempendulo ecacile kanye nomuzwa okhululekile. Ukucushwa kokuxhumana kwe-1NO (ngokuvamile ivulekile) kanye ne-1NC (ngokuvamile ivaliwe) kunikeza ukuguquguquka okukhulu kokulawula isekethe.
Ingasetshenziswa kalula ku-logics ehlukahlukene yesekethe, njengokulawula ukuqala/ukuyeka kwemishini kanye nokushintsha isignali, kuye ngezidingo zangempela. Ifanele izimo ezahlukahlukene emikhakheni ehlukahlukene, kufaka phakathi ukuzenzekela kwezimboni kanye nokulawula kagesi. Kungakhathaliseki ukuthi ilawula imishini yomugqa wokukhiqiza noma idlulisela amasignali kumadivayisi ahlukahlukene kagesi, inikeza izimpendulo ezinembile, ihlinzeka ngokulawula okuthembekile kokusebenza okuphumelelayo nokuzinzile, okwenza kube ukukhetha okuhle kokuthuthukisa ukulula kokulawula imishini kanye nokuzinza.