Masiku ano, plc imatha kulandira malo osungira ndi sensor sigines osakhala osasangalatsa, ndiye zosangalatsa "gwero" ndi "kukhetsa"? Kungotulutsa kwa Plc komwe kumakhala ndi malingaliro a "gwero" ndi "kutayikira".

M'malo mwake, kupatula PLC ya Japan, sikofunikira kuti mugwiritse ntchito maulendo ena kuti mugwiritse ntchito mawu ofupika monga "gwero" ndi "kukhetsa", koma pnp ndi NPN ingagwiritsidwe ntchito mwachindunji.

PNP ndi mzere wamagetsi wotsika kwambiri, ndipo NPN ndi mzere wamagetsi wapamwamba kwambiri. Malingana ngati kulumikizanaku kuli kolondola, zikuwoneka kuti zilibe kanthu kuti malingaliro a "gwero" ndi "kukhetsa" abwezeretsedwa. Komabe, lingaliro linanso loti "logiritso labwino komanso lopanda tanthauzo" ndilolakwika, zomwe zimapangitsa kuti chizindikiro chisinthike.

Zoyimira zabwino komanso zoyipa

Mu mabwalo amtundu wa PNP-mtundu wa magetsi am'madzi ndi chizindikiro chake ali pamlingo wotsika wa 0v. Ngati kulowetsako kuli pamlingo wotsika, palibe kusiyana kwapamwamba ndi ma terminal wamba, kotero palibe masinthidwe osinthira chizindikiro (kuchuluka kwa digito ndi 0). Pokhapokha pokhapokha ngati kuyika kwapamwamba, pali kusiyana kwapagetsi ndi ma terminal wamba ndi chizindikiro chosinthira ndikutulutsa pamlingo wapamwamba. Njira ya digito (kuchuluka kwa digito ndi 1) yomwe imagwira ntchito pomwe chizindikirocho chili pamlingo wapamwamba umatchedwa pnp Logic.

Mu Circle ya NPN, mawonekedwe wamba a magetsi ndi chizindikirocho chili pamlingo wapamwamba (mawonekedwe a madera oyambira). Mukalowetsa pamlingo wapamwamba, palibe kusiyana kwamphamvu pakati pa zotulutsa ndi kutulutsa, kotero palibe kutulutsa chizindikiro (kuchuluka kwa digito ndi 0). Pokhapokha pokhapokha ngati kutsika kotsika (ndikupanga zotulutsa), pali zotulutsa zosinthira (ndi chizindikiro ichi ndi chothandiza (cha digito ndi 1) mode.