Muri iki gihe, PLC irashobora kwakira ibimenyetso bya encoder na sensor idafite amplifier, none niki gishimishije "isoko" na "drain"? Gusa ibisohoka muri PLC bizagira ibitekerezo by "isoko" na "kumeneka".

Mubyukuri, usibye abayapani PLC, ntabwo ari ngombwa ko izindi PLC zikoresha amagambo ahinnye nka "isoko" na "drain", ariko PNP na NPN birashobora gukoreshwa muburyo butaziguye.

PNP numurongo rusange wa voltage ntoya, na NPN numurongo rusange wa voltage. Igihe cyose iyi sano ari ukuri, birasa nkaho ntacyo bitwaye niba ibitekerezo by "isoko" na "drain" byahinduwe. Ariko, ikindi gitekerezo "cyiza cyiza na logique mbi" nacyo kibi, kizatera ikimenyetso guhinduka.

Ubwenge bwiza na logique mbi

Mumurongo wubwoko bwa PNP, itumanaho risanzwe ryo gutanga amashanyarazi nibimenyetso biri kurwego rwo hasi ya 0V. Iyo ibyinjijwe biri kurwego rwo hasi, nta tandukanyirizo rya voltage hamwe na terefone isanzwe, kubwibyo rero nta byongeweho byerekana ibimenyetso bisohoka (umubare wa digitale ni 0). Gusa iyo ibyinjijwe biri murwego rwohejuru, hari itandukaniro rya voltage hamwe na terefone isanzwe kandi ibimenyetso byongeweho byasohotse bisohoka kurwego rwo hejuru. Ubu buryo bwa digitale (ubwinshi bwa digitale ni 1) bukora neza mugihe ibimenyetso biri murwego rwo hejuru byitwa PNP nziza logic.

Mumuzunguruko wa NPN, itumanaho risanzwe ryo gutanga amashanyarazi hamwe nikimenyetso kiri murwego rwo hejuru (ibiranga uyu muyoboro wa amplifier). Iyo ibyinjijwe biri murwego rwohejuru, nta tandukaniro rya voltage riri hagati yinjiza nibisohoka, kubwibyo rero nta guhinduranya ibimenyetso bisohoka (umubare wa digitale ni 0). Gusa iyo ibyinjijwe biri kurwego rwo hasi (gukora feri), habaho ibimenyetso byo guhinduranya ibimenyetso, kandi iki kimenyetso nigikorwa cyiza (umubare wa digitale ni 1) uburyo bwa digitale kurwego rwo hasi, ibyo bita NPN negative logic.