1. Imekobume yendawo yemizi-mveliso

Ekubeni i-Ethernet yayiyilwe ekuqaleni, ayizange isekelwe kwizicelo zenethiwekhi yezoshishino. Xa isetyenziswa kwiindawo zemizi-mveliso, ezijongene neemeko zokusebenza eziqatha, uphazamiseko olumandla phakathi kwemigca, njl. njl., oku kuya kubangela ukuba ukuthembeka kwayo kwehle. Kwimeko yemveliso, uthungelwano lwemizi-mveliso kufuneka lube nokuthembeka okulungileyo, ukubuyiswa kwakhona, kunye nokugcinwa. Oko kukuqinisekisa ukuba xa naliphi na icandelo kwisixokelelwano sothungelwano lisilela, alisayi kubangela ukuba isicelo, inkqubo yokusebenza, okanye inkqubo yenethiwekhi ukuba ingqubeke kwaye ishwabene.

Ukutshintsha kwe-Industrial Ethernet yenzelwe ukuba ithathele ingqalelo iimeko ezintsonkothileyo zendawo yoshishino, ukwenzela ukuba zikwazi ukulungelelaniswa ngakumbi kwindawo yoshishino kwaye zidlale indima yokutshintsha kwe-industrial-grade.

Ubume bendawo yoshishino bubi ngaphezu kokusingqongileyo okuqhelekileyo, ubuncinci ngokwemiqathango yokungcangcazela, ukufuma, kunye nobushushu, iiswitshi eziqhelekileyo azenzelwanga ukumelana neemeko ezahlukeneyo ezibonakala kwindawo yoshishino, iiswitshi eziqhelekileyo azikwazi ukusebenza kule meko inzima. ixesha elide, kwaye badla ngokuthanda ukungaphumeleli, oko kwandisa iindleko zokugcina. Ngokuqhelekileyo akukhuthazwa ukusebenzisa utshintsho lwezorhwebo kwindawo yoshishino. Ukuze wenze ukuba utshintsho lusetyenziswe kule meko inzima, inguqu enokuthi ivumelane nale meko iveliswa. Ukuthembeka kokutshintsha komgangatho wemizi-mveliso kubandakanya ukusilela kwamandla, ukuphazamiseka kwezibuko, i-alam yokukhupha i-relay, igalelo lamandla amabini e-DC, ukhuseleko lweSekethe esebenzayo, ukhuseleko lwesekethe oluzenzekelayo lwe-voltage kunye nangaphantsi kwe-voltage, (ukuthembeka kuyahluka kancinane ngokuxhomekeke kwimodeli. ).

Umahluko wokusebenza ikakhulu ubhekiselele ku: iiswitshi ze-industrial-grade zisondele kunxibelelwano lwenethiwekhi yeshishini emsebenzini, njengonxibelelwano kunye ne-fieldbuses ezahlukeneyo, ukuncipha kwezixhobo, kunye nezixhobo zexesha lokwenyani, njl. njl. Umahluko ekusebenzeni kubonakaliswa ikakhulu kwi iiparamitha zokusingqongileyo zangaphandle. Ukongeza kwiindawo ezininzi ezinzima ezifana nemigodi yamalahle kunye neenqanawa, indawo yemizi-mveliso ikwaneemfuno ezizodwa ngokwe-EMI (ukuhambelana kombane), ubushushu, ukufuma, kunye nokuxhathisa uthuli. Phakathi kwabo, impembelelo yobushushu kwizixhobo zenethiwekhi yezoshishino yeyona ibanzi.

2. Umthwalo womnatha we-Ethernet unzima

Ngenxa yokuba i-protocol ye-MAC ye-Ethernet yi-CSMA/CD, le protocol yenza iingxabano kuthungelwano, ngakumbi xa umthwalo wothungelwano mkhulu kakhulu, ucace ngakumbi. Kwinethiwekhi yezoshishino, ukuba kukho inani elikhulu leengxabano, idatha kufuneka idluliselwe kwakhona ngamaxesha amaninzi, okwandisa kakhulu ukungaqiniseki konxibelelwano phakathi kwamanethiwekhi. Kuthungelwano lolawulo lwemizi-mveliso, oku kungaqiniseki ukusuka kwindawo ukuya kwenye kuya kukhokelela ngokuqinisekileyo ekunciphiseni ukusebenza kolawulo lwenkqubo.

3. Ukusebenza okungqongqo ngexesha langempela ledatha yamashishini

Kwiinkqubo zolawulo lwamashishini, ixesha langempela lingachazwa njengomlinganiselo wexesha lokuphendula lenkqubo kwisiganeko. Emva kokuba isiganeko senzeke, inkqubo kufuneka iphendule ngaphakathi kwexesha elinokuthi libonwe ngokuchanekileyo. Nangona kunjalo, ishishini lineemfuno ezingqongqo kakhulu zokuhanjiswa kwedatha ngexesha lokwenyani, kwaye uhlaziyo lwedatha luhlala lugqityiwe phakathi kwamashumi e-ms. Kwaye nangenxa ye-CSMA/CD yendlela ekhoyo kwi-Ethernet, xa kukho ungquzulwano, idatha kufuneka idluliselwe kwakhona, enokuzanywa ukuya kuthi ga kwi-16. Ngokucacileyo, le ndlela yokusombulula iingxabano iza ngeendleko zexesha. Kwaye xa kukho uqhawulo, nokuba yimizuzwana embalwa, kunokubangela ukumiswa kwemveliso okanye izixhobo kunye neengozi zokhuseleko lomntu.

Ewe, lo mxholo ungasentla kwabelwana ngawo yi-JHA TECH malunga nokuba kutheni iiswitshi zenethiwekhi yeringi yeshishini kufuneka zisetyenziswe kwiindawo zoshishino? Intshayelelo eneenkcukacha kulo mbandela, ndiyathemba ukuba iya kuba luncedo kuye wonke umntu!