Foundation Fieldbus ndi njira yolumikizirana pa digito yomwe imagwiritsidwa ntchito popanga zokha pamodzi ndi Profibus, Modbus kapena HART. Ukadaulowu udawonekera mochedwa kuposa omwe akupikisana nawo: kope loyamba la muyezo lidayamba mu 1996 ndipo pakadali pano limaphatikizanso ma protocol awiri osinthira zidziwitso pakati pa omwe akuchita nawo maukonde - H1 ndi HSE (High Speed ββββEthernet).
Protocol ya H1 imagwiritsidwa ntchito posinthanitsa zidziwitso pa sensa ndi zowongolera, ndipo maukonde ake amachokera ku IEC 61158-2 muyezo wosanjikiza thupi, kulola kusamutsa kwa data kwa 31,25 kbit / s. Pankhaniyi, ndizotheka kupereka mphamvu kuzipangizo zam'munda kuchokera ku basi ya data. Maukonde a HSE amachokera ku maukonde othamanga kwambiri a Efaneti (100/1000 Mbit/s) ndipo amagwiritsidwa ntchito popanga maukonde opangira zowongolera pamlingo wa owongolera ndi kasamalidwe ka bizinesi.
Ukadaulowu umagwira ntchito pomanga makina owongolera makina azigawo zilizonse zamafakitale, koma ndizofala kwambiri m'mabizinesi amafuta ndi gasi komanso makampani opanga mankhwala.
Maluso aukadaulo
Foundation Fieldbus idapangidwa ngati njira ina yosinthira machitidwe azida zodzitchinjiriza pogwiritsa ntchito masensa a analogi ndipo ili ndi maubwino angapo pamitundu yonse yachikhalidwe ndi makina a digito ozikidwa pa Profibus kapena HART.
Mmodzi mwa ubwino waukulu ndi mkulu mlingo wa kudalirika ndi zolakwika kulolerana kachitidwe H1, yomwe imatheka chifukwa cha zinthu ziwiri:
- kugwiritsa ntchito zida zanzeru (masensa ndi ma actuators) pamlingo wamunda;
- kuthekera kokonzekera kusinthanitsa zidziwitso mwachindunji pakati pazida zam'munda popanda kutengapo gawo kwa wowongolera.
Luntha lazida zam'munda lagona pakutha kugwiritsa ntchito ma algorithms owongolera ndikusintha zidziwitso zomwe nthawi zambiri zimayendetsedwa ndi owongolera. M'malo mwake, izi zimalola kuti pulogalamuyo ipitilize kugwira ntchito ngakhale wowongolera akulephera. Izi zimafuna kuti zipangizo zakumunda zikhazikitsidwe moyenera komanso kuti magetsi odalirika a fieldbus aperekedwe.
Zopindulitsa zowonjezera zomwe zimachokera ku digito ya machitidwe olamulira ndi kugwiritsa ntchito masensa anzeru zimaphatikizapo kuthekera kopeza zambiri zochulukirapo kuchokera ku chipangizo chilichonse chakumunda, potsirizira pake kukulitsa kuchuluka kwa kuyang'anira ndondomeko zomwe m'machitidwe achikhalidwe a analogi amangokhala ndi njira yolowera / zotulutsa. . .
Kugwiritsiridwa ntchito kwa topology ya mabasi pa intaneti ya H1 kumakupatsani mwayi wochepetsera kutalika kwa mizere ya chingwe, kuchuluka kwa ntchito yoyika, ndikuchotsa kugwiritsa ntchito zida zowonjezera mumayendedwe owongolera: ma module / zotulutsa, magetsi, komanso m'malo owopsa - spark. zotchinga chitetezo.
H1 imalola kugwiritsa ntchito zingwe zoyankhulirana za 4-20 mA, zomwe zingagwiritsidwe ntchito pokonzanso machitidwe akale olamulira. Chifukwa cha kugwiritsa ntchito mfundo zachitetezo chamkati, ukadaulo umagwiritsidwa ntchito mwachangu m'malo ophulika. Kukhazikika komwe kumatsimikizira kusinthasintha ndi kuyanjana kwa zida kuchokera kwa opanga osiyanasiyana, ndipo chifukwa cha zida zolowera pachipata ndizotheka kulumikizana ndi netiweki yazida zam'munda ndi maukonde owongolera mafakitale amakampani omangidwa pa Ethernet.
Foundation Fieldbus H1 ndiyofanana kwambiri ndi machitidwe a Profibus PA. Matekinoloje onse awiriwa amachokera pamlingo womwewo, kotero machitidwewa ali ndi mitengo yofananira yotengera deta, kugwiritsa ntchito ma code a Manchester, magawo amagetsi a chingwe cholumikizirana, kuchuluka kwa mphamvu zopatsirana, komanso kutalika kovomerezeka kwa chingwe pamaneti. gawo (1900 m). Komanso, mu machitidwe onsewa ndizotheka kugwiritsa ntchito mpaka 4 obwereza, chifukwa chomwe kutalika kwa gawo kumatha kufika 9,5 km. Zomwe zingatheke pamanetiweki pamakina owongolera, komanso mfundo zowonetsetsa kuti chitetezo chamkati chikhale chofala.
Zida Zadongosolo
Zinthu zazikulu za network ya Foundation Fieldbus H1 ndi:
- wolamulira wa decentralized control system (DCS);
- magetsi a fieldbus;
- block kapena modular mawonekedwe zida;
- zoyimitsa mabasi;
- zida zanzeru zakumunda.
Dongosololi lithanso kukhala ndi zida zolowera pachipata (Chida Cholumikizira), zosinthira ma protocol, ma SPD ndi obwereza.
Network topology
Lingaliro lofunikira mu network ya H1 ndi lingaliro la gawo. Ndilo chingwe chachikulu cholumikizirana (Trunk), chokhala ndi nthambi zotuluka (Spur), komwe zida zakumunda zimalumikizidwa. Chingwe cha thunthu chimayambira pa gwero lamagetsi la basi ndipo nthawi zambiri chimathera pa chipangizo chomaliza. Mitundu inayi ya topology imaloledwa kuyankhulana pakati pa olamulira ndi zipangizo zakumunda: point-to-point, loop, basi ndi mtengo. Gawo lirilonse likhoza kumangidwa pogwiritsa ntchito topology yosiyana kapena kugwiritsa ntchito kuphatikiza kwawo.
Ndi topology ya point-to-point, chipangizo chilichonse chakumunda chimalumikizidwa mwachindunji ndi wowongolera. Pankhaniyi, chipangizo chilichonse cholumikizidwa chimapanga gawo lake lamaneti. Topology iyi ndiyovuta chifukwa imalepheretsa dongosolo pafupifupi zabwino zonse zomwe zimapezeka mu Foundation Fieldbus. Pali zolumikizira zambiri pa wowongolera, ndikupangira zida zamagetsi kuchokera ku basi ya data, mzere uliwonse wolumikizirana uyenera kukhala ndi magetsi ake akumunda. Kutalika kwa mizere yolumikizirana kumakhala kotalika kwambiri, ndipo kusinthana kwa chidziwitso pakati pa zida kumangochitika kudzera mwa wowongolera, zomwe sizimalola kugwiritsa ntchito mfundo ya kulekerera kwakukulu kwa machitidwe a H1.
The loop topology imatanthawuza kulumikizana kwa serial kwa zida zakumunda wina ndi mnzake. Apa, zida zonse zakumunda zimaphatikizidwa kukhala gawo limodzi, zomwe zimalola kugwiritsa ntchito zinthu zochepa. Komabe, topology iyi imakhalanso ndi zovuta - choyamba, m'pofunika kupereka njira zomwe kulephera kwa imodzi mwa masensa apakatikati sikungabweretse kutayika kwa kuyankhulana ndi ena. Kubwereranso kwina kumafotokozedwa ndi kusowa kwa chitetezo ku dera lalifupi mu mzere wolankhulana, momwe kusinthana kwa chidziwitso mu gawo sikungatheke.
Ma topology ena awiri apaintaneti ali ndi kudalirika komanso kudalirika kwakukulu - ma topology a mabasi ndi mitengo, omwe apeza kugawa kwakukulu pakumanga ma network a H1. Lingaliro kumbuyo kwa topology izi ndikugwiritsa ntchito zida zolumikizira kulumikiza zida zam'munda ku msana. Zida zophatikizira zimalola chipangizo chilichonse chakumunda kuti chilumikizidwe ndi mawonekedwe ake.
Zokonda pa netiweki
Mafunso ofunikira pomanga maukonde a H1 ndi magawo ake akuthupi - ndi zida zingati zomwe zingagwiritsidwe ntchito pagawo, kutalika kwa gawo ndi kotani, nthambi zitha kukhala zazitali bwanji. Mayankho a mafunsowa amatengera mtundu wa magetsi komanso kugwiritsa ntchito mphamvu zamagetsi pazida zakumunda, komanso m'malo owopsa, njira zowonetsetsa kuti chitetezo chamkati chikhale chotetezeka.
Kuchuluka kwa zida zam'munda mu gawo (32) zitha kupezedwa pokhapokha ngati zithandizidwa kuchokera kumadera akumalo omwe ali pamalowo komanso ngati chitetezo chamkati sichikupezeka. Mukamagwiritsa ntchito masensa ndi ma actuators kuchokera ku basi ya data, kuchuluka kwa zida zitha kukhala 12 kapena kuchepera kutengera njira zachitetezo chamkati.
Kutengera kuchuluka kwa zida zam'munda panjira yamagetsi ndi njira zowonetsetsa kuti chitetezo chamkati chikhale chotetezeka.
Kutalika kwa gawo la intaneti kumatsimikiziridwa ndi mtundu wa chingwe chogwiritsidwa ntchito. Kutalika kwakukulu kwa 1900 m kumatheka mukamagwiritsa ntchito chingwe chamtundu A (zopindika ndi chishango). Mukamagwiritsa ntchito chingwe chamtundu wa D (osapindika chingwe cha multicore ndi chishango chofanana) - mamita 200 okha.
Kudalira kutalika kwa gawo pamtundu wa chingwe.
Kutalika kwa nthambi kumatengera kuchuluka kwa zida zomwe zili mugawo lamaneti. Kotero, ndi chiwerengero cha zipangizo mpaka 12, izi ndizoposa mamita 120. Pogwiritsa ntchito zipangizo 32 mu gawo, kutalika kwa nthambi kudzakhala mamita 1. Pogwirizanitsa zipangizo zam'munda ndi loop, chipangizo chilichonse chowonjezera. amachepetsa kutalika kwa nthambi ndi 30 m.
Kudalira kutalika kwa nthambi kuchokera ku chingwe chachikulu pa chiwerengero cha zipangizo zakumunda mu gawo.
Zinthu zonsezi zimakhudza mwachindunji mapangidwe ndi topology ya dongosolo. Kuti mufulumizitse ndondomeko yopangira maukonde, mapulogalamu apadera amagwiritsidwa ntchito, monga DesignMate kuchokera ku FieldComm Group kapena Fieldbus Network Planner kuchokera ku Phoenix Contact. Mapulogalamuwa amakulolani kuti muwerenge magawo a thupi ndi magetsi a intaneti ya H1, poganizira zoletsa zonse.
Cholinga cha zigawo za dongosolo
Wolamulira
Ntchito ya woyang'anira ndikukhazikitsa ntchito za Link Active Scheduler (LAS), chipangizo chachikulu chomwe chimayang'anira maukonde potumiza mauthenga othandizira. LAS imayambitsa kusinthana kwa zidziwitso pakati pa omwe atenga nawo gawo pa intaneti ndi mauthenga omwe adakonzedwa (okonzedwa) kapena osakonzedwa, amazindikira ndikugwirizanitsa zida zonse.
Kuonjezera apo, wolamulirayo ali ndi udindo wodziwonetsera okha pazida zam'munda ndikuchita ngati chipangizo cholowera pakhomo, kupereka mawonekedwe a Efaneti kuti aziyankhulana ndi mlingo wapamwamba wa kayendetsedwe ka kayendetsedwe ka kayendetsedwe ka kayendetsedwe ka kayendetsedwe ka kayendetsedwe ka kayendetsedwe ka kayendetsedwe ka kayendetsedwe ka kayendetsedwe ka Foundation Fieldbus HSE kapena njira zina zolankhulirana. Pamwamba pa dongosololi, wolamulira amapereka ntchito zowunikira ndi kuyang'anira ntchito, komanso ntchito za kasinthidwe kakutali kwa zipangizo zakumunda.
Pakhoza kukhala ma Active Link Schedulers angapo pamanetiweki, kutsimikizira kuperewera kwa ntchito zomwe zaphatikizidwamo. M'machitidwe amakono, ntchito za LAS zikhoza kukhazikitsidwa pazipata zomwe zimakhala ngati protocol converter kwa machitidwe olamulira omwe amamangidwa pamtundu wina osati Foundation Fieldbus HSE.
Mphamvu zamagetsi za Fieldbus
Dongosolo lamagetsi pamaneti a H1 limagwira ntchito yofunika kwambiri, chifukwa kuti kusinthana kwa data kutheke, voteji mu chingwe cha data iyenera kusungidwa mumtundu wa 9 mpaka 32 V DC. Kaya zida zakumunda zimayendetsedwa ndi basi ya data kapena ndi magetsi akumunda, maukonde amafunikira magetsi a basi.
Chifukwa chake, cholinga chawo chachikulu ndikusunga magawo amagetsi ofunikira pabasi, komanso kupatsa mphamvu zida zolumikizidwa ndi netiweki. Magetsi amabasi amasiyana ndi magetsi wamba chifukwa amakhala ndi mphamvu yofananira ndi ma frequency otengera ma data. Ngati mumagwiritsa ntchito mwachindunji magetsi a 1 kapena 12 V kuti mugwiritse ntchito intaneti ya H24, chizindikirocho chidzatayika ndipo kusinthana kwa chidziwitso pa basi sikungatheke.
Zowonongeka zamagetsi a fieldbus FB-PS (msonkhano wa magawo 4).
Poganizira kufunikira kopereka mphamvu zamabasi odalirika, magetsi a gawo lililonse la netiweki amatha kukhala ochepa. Phoenix Contact FB-PS magetsi amathandizira ukadaulo wa Auto Current Balancing. ASV imapereka katundu wofananira pakati pa magwero amagetsi, omwe ali ndi zotsatira zopindulitsa pa kutentha kwawo ndipo pamapeto pake amabweretsa kuwonjezeka kwa moyo wawo wautumiki.
Makina opangira magetsi a H1 nthawi zambiri amakhala mu kabati yowongolera.
Zida zolumikizirana
Zida zolumikizirana zidapangidwa kuti zilumikize gulu lazida zam'munda ku basi yayikulu ya data. Kutengera ntchito zomwe amachita, amagawidwa m'mitundu iwiri: ma module oteteza gawo (Oteteza Gawo) ndi zotchinga zamunda (Zolepheretsa Minda).
Mosasamala mtundu, zida zamawonekedwe zimateteza maukonde kumayendedwe amfupi ndi ma overcurrents mumizere yotuluka. Pamene dera lalifupi likuchitika, chipangizo chowonetserako chimalepheretsa mawonekedwe a mawonekedwe, kuteteza dera lalifupi kuti lisafalikire mu dongosolo lonse ndipo motero zimatsimikizira kusinthana kwa chidziwitso pakati pa zipangizo zina zapaintaneti. Pambuyo pochotsa kachigawo kakang'ono pamzere, doko lolumikizana lotsekedwa kale limayambanso kugwira ntchito.
Zotchinga zakumunda zimaperekanso kudzipatula pakati pa mabwalo omwe si otetezeka kwenikweni a basi yayikulu ndi mabwalo otetezeka a zida zolumikizidwa zakumunda (nthambi).
Mwakuthupi, zida zamawonekedwe zilinso zamitundu iwiri - block ndi modular. Tsekani zida zamtundu wa FB-12SP zokhala ndi chitetezo cha gawo zimakupatsani mwayi wogwiritsa ntchito mabwalo otetezeka a IC kuti mulumikizane ndi zida zam'munda mu Zone 2, ndipo zotchinga za FB-12SP ISO zimakulolani kulumikiza zida mu Zone 1 ndi 0 pogwiritsa ntchito IA yotetezeka kwambiri. madera.
FB-12SP ndi FB-6SP ma couplers ochokera ku Phoenix Contact.
Ubwino umodzi wa zida za modular ndikutha kukulitsa dongosolo posankha kuchuluka kwa mayendedwe ofunikira kulumikiza zida zakumunda. Kuphatikiza apo, zida za modular zimalola kupanga mapangidwe osinthika. Mu nduna imodzi yogawa ndizotheka kuphatikiza ma modules oteteza gawo ndi zotchinga zakumunda, ndiko kuti, kulumikiza zida zam'munda zomwe zili m'malo osiyanasiyana owopsa kuchokera ku nduna imodzi. Pazonse, mpaka 12 ma module a FB-2SP kapena ma module a FB-ISO amtundu umodzi amatha kukhazikitsidwa pabasi imodzi, motero amalumikizana kuchokera ku nduna imodzi kupita ku zida 24 zakumunda ku Zone 2 kapena masensa 12 ku Zone 1 kapena 0.
Zipangizo zoyankhulirana zimatha kugwiritsidwa ntchito pa kutentha kwakukulu ndipo zimayikidwa m'malo osaphulika Ex e, Ex d ndi digiri ya fumbi ndi chitetezo cha chinyezi cha osachepera IP54, kuphatikizapo pafupi kwambiri ndi chinthu chowongolera.
Zida zodzitetezera ku surge
Ma network a H1 field level level amatha kupanga magawo aatali kwambiri, ndipo mizere yolumikizirana imatha kuyenda m'malo omwe maopaleshoni amatha. Kuchuluka kwa ma pulse kumamveka ngati kusiyana komwe kungachitike chifukwa cha kutulutsa kwa mphezi kapena mabwalo afupiafupi mu mizere yapafupi. Mphamvu yamagetsi, kukula kwake komwe kuli pa dongosolo la ma kilovolts angapo, kumayambitsa kutuluka kwa mafunde a kiloamperes. Zochitika zonsezi zimachitika mkati mwa ma microseconds, koma zingayambitse kulephera kwa zigawo za H1 network. Kuti muteteze zida kuzinthu zoterezi, ndikofunikira kugwiritsa ntchito SPD. Kugwiritsiridwa ntchito kwa ma SPD m'malo mwa chakudya chokhazikika-kudzera m'malo opangira malo kumatsimikizira kugwira ntchito kodalirika komanso kotetezeka kwa dongosololi pamavuto.
Mfundo ya ntchito yake zachokera ntchito quasi-yachidule dera mu nanosecond osiyanasiyana kwa otaya kumaliseche mafunde mu dera limene limagwiritsa ntchito zinthu zimene angathe kupirira otaya mafunde a ukulu wotere.
Pali mitundu yambiri ya SPDs: njira imodzi, njira ziwiri, zokhala ndi mapulagi osinthika, okhala ndi mitundu yosiyanasiyana ya matenda - mwa mawonekedwe a blinker, kukhudzana kouma. Zida zamakono zowunikira kuchokera ku Phoenix Contact zimakuthandizani kuti muzitha kuyang'anira oteteza opaleshoni pogwiritsa ntchito mautumiki a digito a Ethernet. Chomera chamakampani ku Russia chimapanga zida zovomerezeka kuti zigwiritsidwe ntchito pamalo ophulika, kuphatikiza machitidwe a Foundation Fieldbus.
Choyimitsa basi
The terminator imagwira ntchito ziwiri pamaneti - imatsekereza mabasi akumunda, omwe amabwera chifukwa cha kusintha kwa ma siginecha ndikulepheretsa kuti chizindikirocho chisawonekere kumapeto kwa mzere waukulu, ndikuletsa kuwoneka kwa phokoso ndi jitter (phase jitter). chizindikiro cha digito). Choncho, terminator imakulolani kuti mupewe kuoneka kwa deta yolakwika pa intaneti kapena kutaya deta palimodzi.
Gawo lirilonse la maukonde a H1 liyenera kukhala ndi zoletsa ziwiri kumapeto kwa gawolo. Zida zamagetsi zamabasi a Phoenix Contact ndi ma couplers ali ndi zosinthira zosinthika. Kukhalapo kwa zowonjezera zowonjezera pa intaneti, mwachitsanzo, chifukwa cha zolakwika, zidzachepetsa kwambiri mlingo wa chizindikiro mu mzere wa mawonekedwe.
Kusinthana chidziwitso pakati pa magawo
Kusinthana kwa chidziwitso pakati pa zida zam'munda sikungokhala gawo limodzi, koma ndizotheka pakati pa magawo osiyanasiyana a netiweki, omwe amatha kulumikizidwa kudzera pawowongolera kapena makina opangira ma Ethernet. Pankhaniyi, protocol ya Foundation Fieldbus HSE kapena yotchuka kwambiri, mwachitsanzo, Modbus TCP, ingagwiritsidwe ntchito.
Pomanga ma network a HSE, masiwichi amagawo a mafakitale amagwiritsidwa ntchito. Protocol imalola ring redundancy. Pankhaniyi, ndi bwino kukumbukira kuti mu mphete topology, masiwichi ayenera kugwiritsa ntchito imodzi mwa ndondomeko redundancy (RSTP, MRP kapena Extended Ring Redundancy) malinga ndi kukula ndi chofunika maukonde convergence nthawi pamene njira kulankhulana wosweka.
Kuphatikizana kwa machitidwe a HSE ndi machitidwe a chipani chachitatu ndi kotheka pogwiritsa ntchito luso la OPC.
Njira zotsimikizira kuphulika
Kupanga dongosolo la kuphulika, sikokwanira kutsogoleredwa kokha ndi zizindikiro za kuphulika kwa zipangizo ndi kusankha malo ake olondola pa malo. Mkati mwa dongosolo, chipangizo chilichonse sichigwira ntchito pachokha, koma chimagwira ntchito mkati mwa netiweki imodzi. Mumanetiweki a Foundation Fieldbus H1, kusinthana kwa chidziwitso pakati pa zida zomwe zili m'malo osiyanasiyana owopsa sikungotengera kusamutsa deta, komanso kusamutsa mphamvu zamagetsi. Kuchuluka kwa mphamvu zomwe zinali zovomerezeka m'dera limodzi sizingakhale zovomerezeka m'dera lina. Chifukwa chake, kuyesa chitetezo cha kuphulika kwa maukonde akumunda ndikusankha njira yabwino yowonetsetsa, njira yokhazikika imagwiritsidwa ntchito. Mwa njira izi, zomwe zimagwiritsidwa ntchito kwambiri ndi njira zowonetsetsera chitetezo chamkati.
Zikafika pamabasi akumunda, pali njira zingapo zopezera chitetezo chamkati: njira yachikhalidwe ya IS chotchinga, lingaliro la FISCO ndi High Power Trunk Technology (HPT).
Yoyamba imachokera ku kugwiritsidwa ntchito kwa zotchinga za IS ndikugwiritsira ntchito lingaliro lotsimikiziridwa lomwe lakhala likugwiritsidwa ntchito mu machitidwe olamulira pogwiritsa ntchito zizindikiro za 4-20 mA analogi. Njirayi ndi yophweka komanso yodalirika, koma imalepheretsa magetsi ku zipangizo zam'munda m'madera owopsa 0 ndi 1 mpaka 80 mA. Pankhaniyi, malinga ndi chiyembekezo chamtsogolo, ndizotheka kulumikiza zida zosaposa 4 pagawo lililonse ndikugwiritsa ntchito 20 mA, koma pochita zosaposa 2. Pankhaniyi, dongosololi limataya zabwino zonse zomwe zilipo. mu Foundation Fieldbus ndipo kwenikweni imatsogolera ku mfundo-to-point topology, pamene mungalumikizane ndi zipangizo zambiri zam'munda, dongosololi liyenera kugawidwa m'magulu ambiri. Njirayi imachepetsanso kwambiri kutalika kwa chingwe chachikulu ndi nthambi.
Lingaliro la FISCO lidapangidwa ndi "National Metrology Institute of Germany" ndipo pambuyo pake linaphatikizidwa mumiyezo ya IEC, kenako mu GOST. Kuonetsetsa chitetezo chamkati cha intaneti yam'munda, lingaliroli limaphatikizapo kugwiritsa ntchito zigawo zomwe zimakwaniritsa zoletsa zina. Zoletsa zofananira zimapangidwira mphamvu zamagetsi potengera mphamvu zotulutsa, pazida zam'munda potengera mphamvu yamagetsi ndi inductance, pazingwe polimbana ndi kukana, capacitance ndi inductance. Zoletsa zotere zimachitika chifukwa chakuti zinthu za capacitive ndi inductive zimatha kudziunjikira mphamvu, zomwe mwadzidzidzi, pakawonongeka kwa chinthu chilichonse chadongosolo, zimatha kumasulidwa ndikuyambitsa kutulutsa kwa spark. Kuphatikiza apo, lingalirolo limaletsa kugwiritsa ntchito redundancy mumayendedwe amagetsi a basi.
FISCO imapereka zida zamakono zopangira magetsi m'malo owopsa poyerekeza ndi njira yotchinga m'munda. 115 mA ikupezeka pano, yomwe ingagwiritsidwe ntchito kupatsa mphamvu zida za 4-5 pagawo. Komabe, palinso zoletsa kutalika kwa chingwe chachikulu ndi nthambi.
Ukadaulo wa High Power Trunk ndiukadaulo wodziwika bwino kwambiri wachitetezo pamanetiweki a Foundation Fieldbus chifukwa ulibe zovuta zomwe zimakhalapo pamanetiweki otetezedwa kapena FISCO. Pogwiritsa ntchito HPT, ndizotheka kukwaniritsa malire a zida zam'munda pagawo lamaneti.
Ukadaulo suchepetsa magawo amagetsi pamaneti pomwe izi sizili zofunikira, mwachitsanzo, pamzere wolumikizirana wamsana, pomwe palibe chifukwa chokonzekera ndikusintha zida. Kulumikiza zida zakumunda zomwe zili m'malo ophulika, zida zolumikizirana ndi magwiridwe antchito am'munda zimagwiritsidwa ntchito, zomwe zimachepetsa magawo amagetsi pamaneti kuti azipatsa mphamvu masensa ndipo amakhala pafupi ndi chinthu chowongolera. Pankhaniyi, mtundu wa chitetezo cha kuphulika Ex e (chitetezo chowonjezereka) chimagwiritsidwa ntchito pagawo lonse.
Source: www.habr.com