Kodi madoko olumikizirana a RS485 a mita yamtundu wa Lanry ndi chiyani?

Doko lolumikizirana la RS485 ndilofotokozera zaukadaulo zamadoko olumikizirana.Njira yolumikizira doko la RS485 ili mu topology ya basi, ndipo ma node 32 amatha kulumikizidwa ku basi yomweyo.Mu network ya RS485 yolumikizirana nthawi zambiri imatenga njira yolankhulirana ya mbuye-kapolo, ndiye kuti, wokhala ndi akapolo angapo.Nthawi zambiri, maulalo olankhulirana a rS-485 amangolumikizidwa ku malekezero a "A" ndi "B" amtundu uliwonse wokhala ndi zingwe ziwiri zopotoka.Kulumikizana kwa data uku ndi theka - duplex communication mode.Chipangizo chimatha kutumiza kapena kulandira data panthawi yake.Pambuyo pa mawonekedwe a mauthenga a hardware akhazikitsidwa, ndondomeko ya deta iyenera kuvomerezana pakati pa zida zotumizira deta kuti mapeto olandila athe kufotokoza zomwe adalandira, lomwe ndilo lingaliro la "protocol".Protocol yolumikizirana ili ndi mtundu wokhazikika wa protocol, ndipo zogulitsa zathu zonse zimagwiritsa ntchito protocol ya Modbus-RTU.Rs-485 pazipita mtunda wolankhulana ndi pafupifupi 1219m, mu liwiro lotsika, mtunda waufupi, palibe nthawi zosokoneza zomwe zingagwiritse ntchito mzere wopotoka wamba, m'malo mwake, mu liwiro lalitali, kufalikira kwa mzere wautali, kuyenera kugwiritsidwa ntchito kufananiza (nthawi zambiri 120 ω ) Chingwe chapadera cha RS485, komanso m'malo ovuta kusokoneza chiyenera kugwiritsidwanso ntchito chingwe chotchinga chokhala ndi zida zopindika.