Hanyoyi Uku da PLC na Daidaici Kan Gaza Maka
Na’urorin kula da daidaici (standard controllers) kan rasa daidaito idan zafi ya haura 50°C. Allunan zagayen lantarki (circuit boards) suna shan danshi, wanda ke jawo matsalolin da kan bayyana lokaci-lokaci. Girgiza na jiki a hankali tana sakar haɗin wayoyin terminal da lokaci. ABB AC500-XC yana magance kowane wurin gazawa ne da wata dabara ta injiniya dabam.
Ma’anar Harafin Ɗin XC Gaskiya
XC na nufin eXtreme Conditions (yanayi masu tsanani). ABB na shafa “conformal coating” a kan kowane allo na zagaye. Kamfanin kuma yana zaɓar “connectors” da aka tabbatar za su jure sau 100 na cirewa da maƙalawa a cikin yankunan da ke da kura. Yanayin zafin aiki yana daga -25°C zuwa +60°C ba tare da rage ƙarfi ba. Jure danshi ya kai 95% tare da yarda a sami dindindin ɗin taruwar ɗan ruwa (permanent condensation).
Yadda Za a Daurawa Wannan PLC Ɗin Dabam da Na’ura Ta Daidaici
A daura shi a tsaye domin sanyaya ta hanyar gudanawar iska ta kansa (natural convection). A bar tazara na 60 mm a kowane gefe, ba sama da ƙasa kaɗai ba. A shafa “dielectric grease” a duk filayen haɗin I/O kafin a saka. A matse “power terminals” zuwa 0.6 Nm, ba 0.5 Nm da aka saba ba. A ja wata wayar earth ground dabam daga DIN rail zuwa panel. Waɗannan matakai suna hana “ground loops” da wuraren zafi mai yawa (thermal hotspots).
Yadda Hada Fieldbus ke Sauyawa a Yankuna Masu Tsanani
Standard Ethernet ports kan gaza a wuraren da ake samun taruwar ɗan ruwa. AC500-XC yana amfani da M12 connectors masu rufewa don PROFINET da EtherNet/IP. Don tsofaffin tsarin aiki, RS-485 ports suna da kariyar transient suppression har zuwa 2 kV. Za ka iya haɗa ƙananan modules na standard da na XC a kan backplane ɗaya. Amma ka sanya modules na XC a wuraren da ke cikin mafi girman haɗari.
Gwaje-gwajen Aiki Shida Daga Ainihin Shigarwa
Shukar gas a Alberta: Zafin lokacin hunturu ya sauka zuwa -31°C na tsawon sa’o’i 72. PLC ɗin ya ci gaba da yin scanning a 10 ms cycle time ba tare da kuskure ba.
Gidan tace ruwan teku a Qatar: Zafin panel ya kai 65°C saboda zafin rana. Na’urar kula ta yi aiki na watanni 14 kafin tsayawar aiki na tsarin jadawalin gyara.
Masarar man dabino a Indonesia: Danshi yana kai-komo tsakanin 75% da 98% kullum. Bayan shekaru biyu, ba a ga wani lalacewar tsatsa a kan backplane connectors ba.
Hanyar jigilar ma’adinai a Australia: Girgizar manyan motoci masu wucewa ta kai 7g peak. PLC ɗin ya riƙe dukkan haɗin I/O bayan watanni 18.
Gonar kifaye a Norway: Feshin ruwan gishiri yana faruwa kowane mako lokacin tsaftacewa. AC500-XC bai nuna wani alamun tsatsa ba a kan terminals.
Shukar siminti a Turkiyya: Taruwar kura ta rufe ramukan shigar iska na kwandon na’urar. Zafin ciki ya ci gaba da kasancewa a cikin ƙayyadaddun ma’auni saboda ƙarancin zafin da sassan na’ura ke haifuwa da shi.
Kwatancen Kuɗi: PLC Mai Ƙarfi da PLC na Daidaici da Aka Kariya
Standard PLC yana buƙatar kabad mai sarrafa yanayin zafi (climate-controlled cabinet). Wannan kabad ɗin yana buƙatar na’urar sanyaya ko na’urar dumama, tare da tace iska. Jimillar kuɗin shigarwa galibi ya fi na PLC mai ƙarfi da aka ƙera domin wahalhalu da kashi 25-40%. Bugu da ƙari, canza tace iska da kula da na’urar AC na ƙara kuɗaɗen kiyayewa na dindindin. AC500-XC ana makala shi kai tsaye a kan backplate ba tare da tsarin sanyaya rufaffiyar kwandonsa ba. A cikin shekaru biyar, zaɓin mai ƙarfi yawanci yana adana dala $3,000 zuwa $7,000 a kowace shafin aiki.
Lokutan da Bai Dace a Yi Amfani da Jerin AC500-XC ba
Wannan PLC ya fi standard ABB AC500 models tsada. A yi amfani da nau’in XC ne kawai idan yanayin aiki ya wuce abin da aka saba. Tsarkakakken ɗakin kula da na’urori a cikin gida mai daidaitaccen yanayin zafi ba ya buƙatar fasalolin XC. Haka kuma a guji XC don aikace-aikacen Zone 0 masu buƙatar kariya daga fashewa, domin wannan jerin bai da takardar shaidar intrinsic safety.
Akan Yawan Tambayoyi
1. Zan iya haɗa modules na XC da marasa XC a kan DIN rail ɗaya?
I, amma a sanya modules na XC a wuraren da suka fi tsananin wahala. Marasa XC su kasance a wuraren da haɗari ya fi ƙanƙanta, nesa da tushen girgiza.
2. Shin conformal coating na buƙatar kulawa ta musamman lokacin gyara?
I. Kayan aikin walda na al’ada ba sa iya huda wannan coating ɗin. ABB na ba da shawarar a maye gurbin dukkan module ɗin gaba ɗaya maimakon a yi ƙoƙarin gyaran allunan da aka rufe a filin aiki.
3. Ta yaya zan tabbatar cewa shigarwata da gaske na buƙatar matsayin XC?
A auna zafin panel a mafi zafin lokaci na lokacin rani. A duba ko akwai taruwar ɗan ruwa a kan sassan ƙarfe lokacin farawa. A ɗauki ma’aunin girgiza da manhajar accelerometer ta wayar hannu. Idan kowanne daraja ta wuce ƙayyadaddun ma’aunin standard PLC, ka zaɓi XC.
