Yadda Haɗa PLC da DCS Ke Ƙara Ingancin Ayyukan Kera ta Atomatik
Masana’antar Kera ta Atomatik Ta Shiga Sabon Zamanin Haɗa Tsare-tsare
Sashen kera ta atomatik yana fuskantar babbar sauyi. Masana’antu yanzu suna haɗa programmable logic controllers (PLCs) da distributed control systems (DCS) domin samun hangen nesa na aiki fiye da da. Wannan haɗuwar tana ba da damar daidaita samarwa na “discrete manufacturing” da “process control”. Bugu da ƙari, tana shimfiɗa tubalin juyin juya halin dijital gaba ɗaya a dukkan hanyoyin samarwa.
Fassara Matsayin Su: PLC, DCS, da Tsare-tsaren Kula da Ayyuka
PLC na da kwarewa sosai wajen saurin sarrafa “discrete control”. Yana sarrafa na’ura guda-guda, layukan tara sassa, da “robotic cells” tare da “scan cycle” da yawanci yake tsakanin milisekondi 1 zuwa 10. A gefe guda, DCS yana kula da ayyukan ci gaba ba tare da yankewa ba. Yana sarrafa abubuwa irin su zafin jiki, matsa lamba, da kwarara a cikin masana’antar sinadarai ko matatar mai ta amfani da saurin aiwatar da “loop” daga milisekondi 100 zuwa 500. Saboda haka, haɗa waɗannan tsare-tsaren kulawa biyu yana cike gibin da ke tsakanin samarwa na “batch” da ayyukan ci gaba, yana ƙirƙirar haɗaɗɗen ginin kulawa wanda ke cin gajiyar ƙarfafan dandalin kowane ɓangare.
Dalilin Da Ya Sa Haɗa PLC da DCS Ya Zama Muhimmi Ga Masana’antu Na Zamani
Haɗa tsarin kulawa ɗaya yana kawar da killace bayanai. Injiniyoyi suna samun tushen gaskiya guda ɗaya na bayanan “discrete” da na “process”. Wannan haɗin yana rage aikin tara bayanai da hannu sosai. Sakamakon haka, masana’antu suna bayar da rahoton ƙaruwa da kashi 20% zuwa 30% a “overall equipment effectiveness (OEE)” ta hanyar ba da damar amsa matsalolin samarwa da sauri. Daga bangaren fasaha, tsarin da aka haɗa kuma yana sauƙaƙa sarrafa ƙararrawa, yana rage “nuisance alarms” har zuwa kashi 40% ta hanyar daidaita fifiko na ƙararrawa a fannonin kulawa da a da aka ware.
Manyan Fasahohi Da Ke Bada Damar Haɗa Tsare-tsare Cikin Sauƙi
Haɗin zamani yana dogara ne da buɗaɗɗun ka’idoji. OPC UA (Open Platform Communications Unified Architecture) yana ba da musayar bayanai cikin tsaro, ba tare da la’akari da kamfani ba, tare da ɓoyewa da tantancewa a ciki. “Industrial Ethernet” kamar PROFINET da EtherNet/IP suna tabbatar da sadarwa a ainihin lokaci tare da daidaitaccen aiki. Manyan masu samar da kayan aikin atomatik kamar Siemens, Emerson, da ABB yanzu suna ba da fakitin haɗawa da aka riga aka saita, wanda ke sauƙaƙa haɗa sel na PLC da sassan “process” da DCS ke kula da su. Bugu da ƙari, MQTT Sparkplug B ya fito a matsayin sauƙaƙƙen, ingantaccen “protocol” don tsarin IIoT, yana ba da damar auna bayanai cikin sauƙi a duk wasu cibiyoyin kamfani.
Jagorar Fasaha: Tsarin “Communication Protocol”
Zabar daidai tsarin sadarwa abu ne mai matuƙar muhimmanci. Injiniyoyi ya kamata su yi la’akari da manyan hanyoyi uku. Na farko, sadarwa kai tsaye tsakanin “controller-to-controller” tana amfani da “native protocols” kamar Siemens S7 communication ko ControlLogix Produced/Consumed tags. Wannan hanyar tana bayar da mafi ƙarancin jinkiri, amma tana buƙatar kayan aiki masu jituwa. Na biyu, “OPC UA server aggregation” yana shimfiɗa OPC UA server na tsakiya wanda ke tattara bayanai daga PLCs da DCS nodes da dama, yana ba da daidaitaccen “interface” ga MES da dandamalin nazari. Na uku, MQTT tare da Unified Namespace (UNS) yana ƙirƙirar tsarin da bai daure da juna ba, inda duk tsare-tsaren kulawa ke wallafa bayanai zuwa “central broker”. Wannan hanyar tana auna girma cikin sauƙi ga manyan masana’antu, kuma tana sauƙaƙa ƙarin faɗaɗawa a gaba.
Jagorar Fasaha: Tsarin Bayanan Data da Tsara Tags
Tsara bayanai yadda ya kamata yana hana gazawar haɗawa. Injiniyoyi ya kamata su kafa tsarin suna na bai daya kafin su fara “mapping” na tags. Ana ba da shawarar tsarin da ke bin ma’aunin ISA-95: Area_Line_Equipment_TagType_Parameter. Misali, "Blending_Line2_ReactorA_Temp_PV" yana fayyace tushen bayanan da manufarsu. Haka kuma, a fayyace alamu na ingancin bayanai. A haɗa “status bits” ga kowane tag da ke nuna ko bayanan suna da inganci, ko a “manual mode”, ko kuma a ƙarƙashin gyara. Wannan aikin yana ba da damar wa tsarin da ke karɓa ya sarrafa yanayi na ba daidai ba yadda ya kamata maimakon ya yi aiki bisa bayanan da ba daidai ba.
Jagorar Fasaha: Matakan Haɗuwa Cikin Nasara
Mataki na 1: Yi Bincike Kan Kayan Aiki Na Yanzu – A fara da rubuta bayanin dukkan PLCs, DCS controllers, da tsarin hanyar sadarwa. A gano tsofaffin tsare-tsare (“legacy systems”) da za su iya buƙatar “protocol converters”. A rubuta ƙwarewar sadarwa ciki har da “protocols” da ake goyon baya, ƙwaƙwalwa da ake da ita, da nauyin sarrafawa.
Mataki na 2: Fayyaɗa “Data Mapping” – A fayyace yadda za a daidaita muhimman sigogin aiki (“critical process variables”) daga DCS zuwa ayyukan “discrete” da PLCs ke sarrafawa. A mai da hankali kan abubuwan da ke shafar inganci da yawan samarwa. A ƙirƙiri “signal exchange matrix” da ke rubuta alkibla, nau’in bayanai, “scan rate”, da ƙa’idojin sarrafa kuskure ga kowane tag.
Mataki na 3: Zaɓi “Unified Namespace” ɗaya – A shimfiɗa “middleware solution” ko “unified namespace (UNS)” ta amfani da MQTT ko OPC UA. Wannan tsarin yana raba tushen bayanai da aikace-aikace. A tabbatar da cewa mafitar da aka zaɓa tana goyon bayan aikin “store-and-forward” don hana asarar bayanai yayin katsewar hanyar sadarwa.
Mataki na 4: Sanya “Industrial Gateways” – A girka “industrial-grade gateways” don tura bayanai cikin tsaro tsakanin hanyoyin sadarwar PLC da DCS servers. A tabbata waɗannan na’urori suna goyon bayan “edge computing” don sarrafa bayanai a gefe. A saita “firewalls” da ƙa’idoji masu tsauri da ke bari ne kawai mu’amalar da ake buƙata tsakanin matakan tsaro.
Mataki na 5: Tabbatar Da Sahihancin Bayanai – A gudanar da aiki a layi ɗaya don tabbatar da cewa daidaiton bayanai ya cika ƙayyadaddun buƙatu. A gudanar da gwajin jinkiri (“latency tests”) don tabbata cewa “real-time control loops” ba su lalace ba. A tabbata cewa daidaita lokaci a dukkan controllers yana amfani da NTP ko PTP da daidaito a cikin milisekondi 10 ga abubuwan da aka yi musu alamar lokaci (“time-stamped events”).
Mataki na 6: Horar Da Ma’aikata – A ba da horo na juna ga ƙungiyoyi da suka saba da muhalli na PLC ko DCS kawai. Tsarin haɗaɗɗen HMI (human-machine interface) yana taimakawa wajen sauƙaƙa sauyi. A ƙirƙiri jagororin warware matsala da ke magance manyan nau’ikan gazawar haɗuwa.
Abubuwan Da Ake Lurawa Da Su Wajen Shigar da Tsarin Haɗaka
Amincin hanyar sadarwa shi ne tushen haɗawa. A yi amfani da “managed industrial switches” don raba zirga-zirgar bayanai, a kuma fifita bayanan kulawa ta amfani da “Quality of Service (QoS) protocols”. A kare duk tashoshin sadarwa da “firewalls” da tsarin izinin shiga bisa rawa (role-based access control). A aiwatar da tsaron “defense-in-depth” ta hanyar ware matakai daban-daban ga hanyoyin sadarwar kulawa, na kula (“supervisory networks”), da na kamfani (“enterprise networks”). Bugu da ƙari, a tsara tsarin maimaitawa (“redundancy”) a matakin controller da hanyar sadarwa don kauce wa wuri guda da zai jawo daina aiki gaba ɗaya. Lokacin “commissioning”, a tabbatar da kowane kwarara na bayanai tare da injiniyoyi da ma’aikatan samarwa don tabbatar da daidaito da manufofin samarwa. A yi gwajin “failover” ta hanyar kwaikwayon katsewar hanyar sadarwa don tabbatar da tsarin dawowa da kansa.
Zurfin Fasaha: Daidaita “Scan Cycle”
Wani ƙalubale da ake mantawa da shi shi ne daidaita “scan cycle”. PLCs suna aiwatar da lissafi cikin daidaitaccen lokaci a matakai na dindindin, yayin da aiwatar da “loop” a DCS zai iya bambanta gwargwadon fifikon “loop”. Lokacin da ake musayar bayanai tsakanin tsare-tsaren, rashin daidaiton saurin sabunta bayanai na iya haifar da matsalolin lokaci. Injiniyoyi ya kamata su aiwatar da tsarin gaisuwar bayanai (“data handshaking”) ga “interlocks” masu muhimmanci. Ga bayanai marasa muhimmanci sosai, a yi amfani da “deadband filtering” don rage zirga-zirgar bayanai da ba dole ba a hanyar sadarwa. Kyakkyawar hanya ita ce a daidaita saurin aiwatar da “loop” na DCS da “scan cycle” na PLC na kayan aikin da suke hulɗa da su, yawanci a daidaita su a matakin milisekondi 100 ga aikace-aikacen gauraye.
Misalin Aiki: Masana’antar “Automotive Powertrain”
Wani babban masana’antar kera motoci ya haɗa robobin tarawa da PLC ke sarrafawa da DCS na dukan shuka don samar da injuna. Tsarin ya sa ido kan bayanai 3,200 a tashoshi 14. Ta hanyar haɗa lokutan zagayowar robobi da bayanan zafi daga DCS, masana’antar ta rage gyaran aiki (“rework”) da kashi 28%. Injiniyoyi sun aiwatar da OPC UA aggregation tare da servers guda biyu da ke bayar da bayanai da kashi 99.99% na lokaci. A shekara ɗaya, adadin kuɗin da aka ajiye ya haura dalar Amurka miliyan 2.1, tare da dawowar jari cikin watanni takwas kacal.
Misalin Aiki: Masana’antar Kera Sinadarin Magani
Wata kamfani na magunguna ya fuskanci ƙalubale wajen bin diddigin “batch” a tsakanin “discrete material handling” da “continuous chemical synthesis”. Sun haɗa PLCs da ke sarrafa auna kayan albarkatu zuwa DCS da ke kula da tukunyar sinadaran ta amfani da PROFINET tare da “fiber optic backbone”. Wannan tsarin da aka haɗa ya inganta daidaiton bayanan “batch record” da kashi 40% kuma ya rage lokacin binciken bambance-bambancen matsala daga sa’o’i 12 zuwa ƙasa da mintuna 90. Yawan amfanin samarwa ya karu da kashi 9.5% a cikin shekara ta farko. Haɗin ya kuma ba da damar “electronic batch records” masu bin dokar FDA 21 CFR Part 11.
Misalin Aiki: Samar Da Abinci Da Abin Sha
Wani babban kamfani na abin sha na duniya ya haɗa layukan cikawa da PLC ke sarrafawa da DCS na tsakiya da ke kula da injinan amfani da CIP (clean-in-place). Haɗin ya yi amfani da EtherNet/IP tare da tsarin “device-level ring (DLR)” don samun “network redundancy”. Daidaita saurin cikawa a ainihin lokaci bisa bayanan zafin jiki daga sama ya rage ɓarnar samfur da kashi 18%, kuma amfani da makamashi domin zagayowar tsaftacewa ya ragu da kashi 15%. Masana’antar ta cimma saurin sauya nau’in samfur (changeover) da kashi 22% fiye da da. Bugu da ƙari, haɗin ya ba da damar saƙonnin gyaran kaya kafin su lalace (“predictive maintenance alerts”) wanda ya rage lokacin tsayawar ba zato ba tsammani da kashi 31%.
Misalin Aiki: Masana’antar Tsakiyar Man Fetur Da Iskar Gas
Wani wajen sarrafa iskar gas ya haɗa tashoshin damfara 23 da PLC ke sarrafawa da DCS na tsakiya da ke kula da hasumiyoyin rarrabuwa (“fractionation towers”). Injiniyoyi sun shimfiɗa hanyoyin zoben “fiber optic” guda biyu tare da OPC UA tunneling ta cikin firewalls. Tsarin da aka haɗa ya samar da sarrafa ƙararrawa ɗaya a kan tags 12,000, yana rage lokacin martanin ma’aikaci da kashi 42%. Ta hanyar daidaita kulawa, wurin ya rage amfani da iskar gas ɗin da ake ƙonewa da kashi 8.3%, inda adadin ajiya a shekara ya kai dalar Amurka miliyan 1.7. Haɗin ya kuma ba da damar gano matsaloli daga nesa (“remote diagnostics”) wanda ya rage tura ma’aikata zuwa filin aiki da kashi 35%.
Ƙalubalen Haɗawa Da Dabarun Magance Su
Matsalolin jituwa suna yawan tasowa lokacin da ake haɗa tsofaffin PLCs da sabbin dandamalin DCS. Sai dai “protocol converters” da “edge gateways” suna iya cike wannan gibi yadda ya kamata. Ga tsofaffin PLCs da ke amfani da “proprietary protocols” kamar Modbus RTU ko Allen-Bradley DH+, “industrial protocol gateways” daga kamfanoni kamar ProSoft ko Moxa suna ba da tabbataccen sauya “protocol”. Tsaron yanar-gizo kuma babban lamari ne. Aiwtar da dabarar “defense-in-depth” ciki har da raba hanyar sadarwa gida-gida (“network segmentation”), industrial firewalls, da sa ido na dindindin tare da “intrusion detection systems (IDS)” na rage haɗari. Daga hangen injiniya, zuba jari a daidaitattun matakan sadarwa yana kawo sassauci na dogon lokaci kuma yana rage makale da mai kaya guda. Haka kuma, a ci gaba da adana cikakken bayanin yadda aka gina tsarin (“as-built documentation”) ciki har da zane-zanen tsarin hanyar sadarwa, tsarin IP addresses, da jadawalin “tag mapping”.
Sabbin Al’adu A Masana’antu Da Sharhin Injiniyoyi
Kasuwar kera ta atomatik tana karɓar IIoT da tsare-tsaren kulawa da za a iya shiga ta “cloud” da sauri. “Edge computing” yanzu yana ba da damar yanke manyan hukuncen kulawa a wurin, yayin da ake tura bayanan da aka tara zuwa tsarin kamfani. Daga ƙwarewata ta injiniya, kamfanonin da suka rungumi buɗaɗɗen ka’idoji kamar OPC UA da MQTT suna samun gasa. Suna samun saurin faɗaɗa shirye-shiryen “smart manufacturing” kuma suna iya haɗa basirar na’ura (AI) don “predictive maintenance” cikin sauƙi. Duk da haka, injiniyoyi dole ne su tantance illolin tsaron yanar-gizo sosai kafin su haɗa tsare-tsaren kulawa da dandamalin cloud. Dabarar da ta fi dacewa ita ce shimfiɗa “edge gateways” da ke adana bayanai na ɗan lokaci, suna kuma tura bayanai ta fitarwa kaɗai (“outbound-only connections”) don rage wuraren da za a iya kai hari.
Hasashen Fasaha: Sarrafa Ƙararrawa A Muhallin Da Aka Haɗa
Sarrafa ƙararrawa yana ƙara rikitarwa idan an haɗa muhallin PLC da DCS. Injiniyoyi ya kamata su shimfiɗa “unified alarm philosophy” wadda ke daidaita fifiko, yadda za a sanar, da matakan martani. A bi ma’aunin ISA-18.2 da IEC 62682 wajen tsara tsarin ƙararrawa. Wani kuskure da ake yawan yi shi ne ambaliyar ƙararrawa (“alarm flooding”) inda tsare-tsare da dama ke haifar da jere-jeren ƙararrawa. A yi amfani da “alarm shelving” da “suppression logic” don hana ƙararrawa marasa amfani lokacin gyara ko lokacin fara aiki. Sabbin dandamalin haɗawa suna goyon bayan tara ƙararrawa da ƙarin mahallin bayani, suna ba da damar ma’aikata su ga asalin musabbabin matsala maimakon a gan su a matsayin ƙararrawa dabam-dabam.
Yanayin Mafita: Shigar Da Shuka Mai Hankali Na Sinadaran Masana’antu
Wata matsakaitan masana’antar sinadaran masana’antu ta haɗa layukan marufi 45 da PLC ke sarrafawa da DCS da ke akwai tun da da, wanda ke kula da ma’aunin tukunyar sinadaran. Farashin aikin ya kai dalar Amurka 380,000 kuma ya ɗauki watanni bakwai. Injiniyoyi sun shimfiɗa tsarin OPC UA server mai maimaituwa (“redundant”) tare da saurin sabunta bayanai na milisekondi 100. Bayan haɗa tsarin, yawan samarwa gaba ɗaya ya ƙaru da kashi 19%. Masana’antar ta rage lokacin tsayawar ba zato ba tsammani da kashi 34% ta hanyar sarrafa ƙararrawa guda ɗaya da ya rage ɗaukar nauyin ƙararrawar ma’aikaci daga 1,200 zuwa 180 a kowace shif. Tare da ƙaruwa da kashi 12% a ingancin amfani da ma’aikata, lokacin dawowar jari bai kai watanni 14 ba. Haɗin ya kuma ba da damar bin diddigin kayan aiki a ainihin lokaci, wanda ya rage kuɗaɗen ajiyar kaya a ma’ajiya da dalar Amurka 210,000 a shekara.
Kammalawa
Haɗa tsarin PLC da DCS ba zaɓi ba ne kuma ga kamfanonin masana’antu masu neman gasa. Wannan haɗin yana ƙara ganin ainihin halin aiki a ainihin lokaci, yana inganta amfani da kadarori, kuma yana tallafa yanke shawara bisa bayanai. Kamfanoni ya kamata su ɗauki tsarin sauƙaƙa-shigar mataki-mataki, suna amfani da sabbin “communication protocols” kuma suna zuba jari a horar da ma’aikata domin su fitar da cikakkiyar ribar tsare-tsaren kulawa. Ga injiniyoyi, nasara tana dogara ne kan shiri mai kyau, tsara bayanai yadda ya kamata, da ingantaccen gwaji. Rikitarwar fasaha ta cancanci hakan idan aka dubi ribar aiki: ƙarancin lokacin tsayawa, ingantacciyar inganci, da ƙaramin “total cost of ownership” a dukkan ginin tsarin kulawa.
