Mita Rere Hongere Tuwhera Atamai: Putanga Modbus/4-20mA mō te Whakaurunga Pūnaha Koreutu

Ko te ngako o tēnei mita rere atamai ko tōna āheinga putanga rua, i hangaia hei urutau ki ngā hiahia hononga kanorau o ngā pūnaha ahumahi hou. Ko te putanga anaro 4-20mA, he paerewa ahumahi kua whakamatautauria mō te wā, e tuku ana i te hototahi mono-ā-ringa me ngā pūnaha whakahaere tawhito, ngā kaitātari raraunga, me ngā PLC (Ngā Kaiwhakahaere Arorau Ka taea te Whakahōtaka). Ka whakamaoritia e tēnei tohu anaro te tere rere ki roto i te awhe iahiko tonu—ko te 4mA te tohu mō te rere iti rawa e taea te ine, ā, ko te 20mA te tohu mōrahi—e āhei ai te aroturuki wā-tūturu me te kore whirihoranga uaua. Mō ngā whare e whakawhirinaki ana ki ngā hanganga tawhito, ka whakarite tēnei i te whakawhiti maeneene ki te ine atamai me te kore e hiahiatia he whakahou pūnaha utu nui.​

Hei tāpiri atu ki te putanga anaro ko te kawa whakawhitiwhiti kōrero Modbus, he paerewa matihiko e mōhiotia ana mō tōna māmā me tōna whānui i roto i te aunoatanga ahumahi. Ka taea e Modbus te whakawhiti raraunga ara-rua i waenga i te mita rere me ngā pūnaha manaaki, pērā i ngā tūāpapa SCADA (Mana Whakahaere me te Kohi Raraunga), ngā taputapu aroturuki kapua, te pūmanawa whakamahere rauemi hinonga (ERP) rānei. Kāore i rite ki ngā tohu anaro, ka tukuna e Modbus ngā raraunga matihiko taipitopito, tae atu ki te tere rere me te pāmahana, te pēhanga, te tūnga whakatikatika, me ngā matohi tātaritanga. Mā tēnei taumata māramatanga ka taea e ngā tīma tiaki te tautuhi wawe i ngā take—pērā i te paru o te pūoko, ngā tauira rere rerekē rānei—i mua i te pikinga ki te wā kore utu nui. Hei tāpiri, ka tautoko a Modbus i te whatunga maha-taka, ka taea te hono i ngā mita rere maha ki tētahi kaiwhakahaere kotahi, ka whakaiti i te uaua o te waea me ngā utu tāutanga.​

Ka puta tika te whakaurunga maeneene ki ngā painga whakahaere e kitea ana mō ngā kaiwhakamahi mutunga. Hei tauira, i roto i ngā tipu maimoatanga wai para, ka tukutahi ngā putanga o te mita rere awa tuwhera atamai me te pūnaha SCADA o te tipu hei whakahaere aunoa i ngā tukanga maimoatanga: ina nui ake ngā reiti rere i ngā paepae kua whakaritea, ka whakaohohia e te pūnaha ngā whakatikatika ki te horopeta matū, ki ngā tere papu rānei, kia tutuki ai ngā ture taiao me te arotau i te whakamahinga rauemi. Mō ngā whare ahumahi e aro turuki ana i mua i te maimoatanga, ka whāngaihia e te putanga 4-20mA ngā raraunga wā-tūturu ki roto i ngā pūnaha whakahaere tukanga, ka taea ai te whakatikatika tika i ngā tawhā whakaputa hei whakaiti i te para me te whakanui ake i te whai huatanga. I taua wā, ka whakamahia e ngā rōpū whakahaere wai ā-rohe te hononga Modbus hei whakauru i ngā raraunga rere mai i ngā awaawa, ngā paipa wai, me ngā pūnaha wai ua ki roto i tētahi papatohu pokapū, e whakarato ana i tētahi tirohanga whānui o te tohatoha wai me te whakahaere i ngā mahi tiaki e ahu mai ana i ngā raraunga.

Haunga te hototahitanga, ka whakarei ake ngā āheinga whakauru o te mita rere awa tuwhera atamai e tōna hoahoa pakari me te mahi pono. I hangaia hei tu atu i ngā āhuatanga parae kino - mai i ngā pāmahana tino kino ki ngā taiao waikura - ka whakarite te mita i te tuku raraunga pumau ahakoa i roto i ngā tono uaua. Mā tōna hangarau ine ultrasonic kore-whakauru ka whakakorea te hiahia mō te tapahi paipa, te whakaweto pūnaha rānei i te wā tāutanga, ka whakahaere ake i te tukanga whakauru. Ka māmā ake hoki te whakatikatika: mā Modbus, ka taea e ngā kaiwhakamahi te whakarite i ngā tautuhinga mamao, te whakahou i te pūmanawa, te manatoko rānei i te tika me te kore e uru atu ki te mita, ka penapena i te wā me te mahi.

I tēnei wā e tino hira ana te whakatau i runga i ngā raraunga mō te hiranga o te mahi, ko te mita rere atamai tuwhera me te putanga Modbus/4-20mA he taputapu tino nui. Ka whakakorea te raruraru o ngā pūnaha kore hototahi, ka whakaiti i ngā utu whakauru, ā, ka whakatuwhera i te pūmanawa katoa o ngā raraunga rere hei akiaki i te whai huatanga, te tutuki i ngā whakaritenga, me te pumau. Ahakoa te whakahou i tētahi whare o nāianei, te hoahoa rānei i tētahi pūnaha aroturuki hou, ka tukuna e tēnei mita rere te hononga pai e hiahiatia ana e ngā ahumahi hou—e whakaatu ana ina mahi tahi te ine me te whakauru, ka eke te hua me te mahi ki ngā taumata hou.