Iprotocol ye-Modbus lulwimi jikelele olusetyenziswa kubalawuli be-elektroniki.Ngale protocol, abalawuli banokunxibelelana nabanye kunye nezinye izixhobo kwinethiwekhi (efana ne-Ethernet).Ibe ngumgangatho weshishini jikelele.Le protocol ichaza umlawuli owaziyo ngesakhiwo somyalezo osetyenziswayo, nokuba inethiwekhi apho banxibelelana khona.Ichaza indlela umlawuli acela ngayo ukufikelela kwezinye izixhobo, indlela yokuphendula kwizicelo ezivela kwezinye izixhobo, kunye nendlela yokubona kunye nokungena iimpazamo.Icacisa i-schema yesizinda somyalezo kunye nefomathi eqhelekileyo yomxholo.Xa unxibelelana ngothungelwano lwe-ModBus, lo mthetho womthetho umisela ukuba umlawuli ngamnye kufuneka ayazi idilesi yesixhobo sakhe, aqaphele imiyalezo ethunyelwe ngedilesi, kwaye agqibe ukuba zeziphi iintshukumo ekufuneka zenziwe.Ukuba impendulo iyadingeka, umlawuli uvelisa umyalezo wempendulo kwaye uyithumele usebenzisa i-ModBus.Kwezinye iinethiwekhi, imiyalezo equlethe iprotocol ye-Modbus iguqulelwa kwisakhelo okanye izakhiwo zepakethi ezisetyenziswa kuloo nethiwekhi.Olu tshintsho lukwandise indlela yothungelwano oluthe ngqo ekusombululeni iidilesi zecandelo, iindlela zendlela, kunye nokubhaqwa kweempazamo.Inethiwekhi ye-ModBus inomamkeli omnye kwaye zonke itrafikhi zihanjiswa nguye.Inethiwekhi inokuxhasa ukuya kuthi ga kwi-247 abalawuli bekhoboka elikude, kodwa inani langempela labalawuli bekhoboka elixhaswayo lixhomekeke kwizixhobo zonxibelelwano ezisetyenzisiweyo.Ukusebenzisa le nkqubo, iPC nganye inokutshintshiselana ngolwazi kunye ne-central host ngaphandle kokuchaphazela iPC nganye ukwenza imisebenzi yayo yokulawula.
Kukho iindlela ezimbini onokukhetha kuzo kwinkqubo ye-ModBus: i-ASCII (ikhowudi yotshintshiselwano yolwazi lwaseMelika) kunye ne-RTU (Isixhobo seRemote Terminal).Iimveliso zethu ngokubanzi zisebenzisa imo ye-RTU yonxibelelwano, kwaye nganye i-8Bit byte kumyalezo iqulethe oonobumba ababini be-4Bit behexadecimal.Inzuzo ephambili yale ndlela kukuba inokudlulisa idatha eninzi kwizinga elifanayo le-baud kunendlela ye-ASCII.
Ixesha lokuposa: Jul-22-2022