Modbus protocol mutauro unoshandiswa nevanhu vose mu electronic controllers. Kuburikidza neprotocol iyi, vatongi vanogona kutaurirana nevamwe uye nedzimwe midziyo kuburikidza ne network (yakadai se Ethernet). Yava standard yepasi rose yeindasitiri. Iyi protocol inotsanangura controller anoziva nezvemaumbirwo emeseji ari kushandiswa, zvisinei ne network yavanotaurirana nayo. Inotsanangura kuti controller anokumbira sei kupinda kune mimwe midziyo, maitiro ekupindura zvikumbiro kubva kune mimwe midziyo, uye maitiro ekuona nekunyora zvikanganiso. Inotsanangura schema ye domain yemeseji uye fomati yakajairika yezviri mukati. Pakutaurirana kuburikidza ne network yeModBus, iyi protocol inoona kuti controller yega yega inofanirwa kuziva kero yemudziyo wayo, kuziva meseji dzinotumirwa nekero, uye kusarudza matanho ekutora. Kana mhinduro ichidikanwa, controller inogadzira meseji yemhinduro uye inoitumira uchishandisa ModBus. Pane mamwe ma network, meseji dzine Modbus protocol dzinoshandurwa kuita furemu kana mapaketi anoshandiswa pane network iyoyo. Kuchinja uku kunowedzerawo nzira chaiyo ye network yekugadzirisa kero dzezvikamu, nzira dzekufambisa, uye kuona zvikanganiso. Network yeModBus ine host imwe chete uye traffic yese inofambiswa naye. Network inogona kutsigira vanodzora varanda vanosvika 247 vari kure, asi huwandu chaihwo hwevanodzora varanda hunotsigirwa hunoenderana nemidziyo yekutaurirana inoshandiswa. Uchishandisa sisitimu iyi, PC yega yega inogona kuchinjana ruzivo nemukuru wepakati pasina kukanganisa PC yega yega kuti iite mabasa ayo ekudzora.
Pane nzira mbiri dzekusarudza kubva muModBus system: ASCII (American information interchange code) uye RTU (Remote Terminal Device). Zvigadzirwa zvedu zvinowanzoshandisa RTU mode pakutaurirana, uye 8Bit byte yega yega iri mumeseji ine mavara maviri e4Bit hexadecimal. Chinhu chikuru chekushandisa nzira iyi ndechekuti inogona kutumira data rakawanda ne baud rate yakafanana kupfuura ASCII method.
Nguva yekutumira: Chikunguru-22-2022