Modbus Sanegbaa: Nɔ ni He Hiaa ni Akɛmaa Nitsumɔhei ni Ebɛ Naagbai
Modbus Sanegbaa: Nɔ ni He Hiaa ni Akɛmaa Nitsumɔhei ni Ebɛ Naagbai
Nɔkwɛmɔnɔ
Modbus ji gbɛjianɔtoo ko ni akɛtsuɔ nii yɛ nitsumɔhei, ni afee yɛ afi 1979 koni ekɛha sanegbaa aya nɔ yɛ tsɔnei ni tsuɔ nii diɛŋtsɛ lɛ ateŋ. Modbus ji nɔ ni akɛtsu nii shishijee akɛ nitsumɔ he gbɛjianɔtoo ni akɛtsɔɔ saji amli kɛtsɔɔ sɛɛkuu lɛ nɔ, ni amrɔ nɛɛ abaanyɛ atsake mli hu koni akɛtsu nii kɛtsɔ sɛɛkuu, TCP/IP, kɛ User Datagram Protocol (UDP) nɔ. Wolo nɛɛ haa shishitsɔɔmɔ ni mli kwɔ ni kɔɔ protocol nitsumɔ lɛ he.
Mɛni ji Modbus gbɛjianɔtoo?
Modbus ji nibimɔ hetoo gbɛjianɔtoo ni akɛtsuɔ nii kɛtsɔɔ nuŋtsɔ kɛ nyɔŋ wekukpaa nɔ. Yɛ nuŋtsɔ kɛ nyɔŋ wekukpaa mli lɛ, sanegbaa baa mli be fɛɛ be yɛ mɛi enyɔ enyɔ mli (esa akɛ tsɔne ko aje nibimɔ ko shishi ni no sɛɛ lɛ emɛ hetoo), ni tsɔne ni biɔ nii lɛ (tsɔne nuŋtsɔ) ji mɔ ni jeɔ nifeemɔ fɛɛ nifeemɔ shishi. Nɔ ni afɔɔ feemɔ ji akɛ, tsɔne titri ni akɛtsuɔ nii ji gbɔmɔ kɛ tsɔne teŋ tsakpaa (HMI) loo nɔkwɛmɔ kɛ saji ahe nitsumɔ (SCADA) gbɛjianɔtoo, yɛ be mli ni tsɔnei ni ji enyɔ lɛ ji nibii ni nuɔ nii ahe, nibii ni kudɔɔ jwɛŋmɔ ni anyɛɔ atsuɔ he nii (plcs), loo nibii ni akɛtsuɔ nii ni haa mɔ tsui nyɔɔ emli (PACs). Nibii ni yɔɔ nibimɔi kɛ hetooi nɛɛ amli lɛ, kɛ agbɛnɛ hu, tsɔne ni kɛ shɛɛ saji nɛɛ majeɔ lɛ, ji nɔ ni protocol lɛ mli fãi srɔtoi lɛ tsɔɔ mli.
Mɛɛ nibii fiɔ Modbus protocol lɛ sɛɛ?
Modbus protocol lɛ ji nɔ ni nibii fiɔ sɛɛ babaoo, ni nɔ ni fata he ji tsɔnei ni akɛkwɛɔ nibii anɔ (PLCs), tsɔnei ni yɔɔ shɔŋŋ (RTUs), nibii ni nuɔ nii ahe, nibii ni tsuɔ nii, gbɔmɔ kɛ tsɔne teŋ tsakpaai (HMIs), kɛ nibii krokomɛi babaoo ni yɔɔ nitsumɔhei ni tsuɔ nii diɛŋtsɛ kɛ nitsumɔhei amli. Nitsumɔhe ni Kwɛɔ Nitsumɔi Anɔ lɛ. Modbus ji nɔ ni akɛtsuɔ nii babaoo ni ebatsɔ de facto shishitoo mla kɛha nitsumɔ yɛ nibii ni nifeelɔi srɔtoi feɔ yɛ nitsumɔi tamɔ nibii afeemɔ, hewalɛ, gbɛfaa, kɛ tsumaa ni tsuɔ nii diɛŋtsɛ.
Modbus gateway ji tsɔne ko ni tsakeɔ shɛɛ sane ni nitsumɔhei ni tsuɔ nii amɛ diɛŋtsɛ amɛhe lɛ kɛtsuɔ nii lɛ. Ekɛ tsɔnei ni yɔɔ ŋaa lɛ wieɔ, ebuaa saji anaa kɛjɛɔ tsɔnei ni yɔɔ shishigbɛ lɛ amli ni ekɛyaa Modbus shinaa lɛ naa, ekɛ kɔmpiuta ni yɔɔ ŋwɛi lɛ feɔ tsakpaa, ni ekɛ network kɔmpiutai lɛ feɔ Modbus protocol.
Modbus sanegbaa gbɛ
Modbus protocol lɛ yɛ gbɛi titrii etɛ ni akɛgbaa sane:
lRTU (Tɛminaal He ni yɔɔ shɔŋŋ)
lASCII (Amerika mlai kɛha saji tsakemɔ)
lTCP/IP (Transɛmɔmɔ He Gbɛjianɔtoo/Intanɛt He Gbɛjianɔtoo)
Yɛ Modbus mla lɛ mli lɛ, Modbus TCP kɛ Modbus RTU ji gbɛi enyɔ ni atsɔɔ nɔ awieɔ. Eyɛ mli akɛ afee amɛ fɛɛ koni amɛha saji ni akɛtsuɔ nii yɛ tsɔnei ateŋ lɛ aya hiɛ moŋ, shi srɔtofeemɔi komɛi ni sa kadimɔ yɛ gbɛi ni atsɔɔ nɔ akɛtsuɔ nii kɛ bɔ ni akɛtsuɔ nii ahaa lɛ mli.
Gbɛ ni atsɔɔ nɔ awieɔ kɛ oyaiyeli
Modbus TCP kɛ TCP/IP protocol stack lɛ tsuɔ nii kɛhaa saji ni akɛhaa kɛtsɔɔ tsɔnei anɔ, ni ekɛ ehe fɔ̃ɔ tsɔnei ni akɛtsuɔ nii tamɔ Ethernet lɛ anɔ koni enyɛ eshɛ saji ni yaa oya kɛ nibii ni fa babaoo lɛ ahe.
Modbus RTU lɛ, yɛ gbɛ kroko nɔ lɛ, ekɛ saji yaa kɛtsɔɔ serial lines tamɔ RS-485 kɛ RS-232, ni yɔɔ oyaiyeli ni akɛhaa lɛ nɔ. Data tsɔsemɔ kɛ nitsumɔ shihilɛi.
Modbus RTU lɛ kɛ saji ni yɔɔ mli lɛ woɔ mli yɛ gbɛ ni yɔɔ kuku nɔ, ni adrɛs ŋmɔji, nitsumɔ koodii, saji, kɛ checksum ŋmɔji fata he. Akɛ nɛkɛ gbɛjianɔtoo nɛɛ tsuɔ nii jogbaŋŋ yɛ gbɛ ni ji enyɔ nɔ, ni ehaa efeɔ nɔ ni sa jogbaŋŋ kɛha be-mli loo maŋ nɔkwɛmɔ nitsumɔi, titri lɛ yɛ hei ni tsɔne ni akɛtsuɔ nii yɛ tsɔne mli lɛ bɛ, tamɔ nitsumɔhei ni tsuɔ nii amɛ diɛŋtsɛ amɛhe, gbɛjianɔtoi ni akɛwoɔ mli, tsɔnei ni nuɔ nii ahe, kɛ tsɔnei ni akɛkwɛɔ nibii anɔ lɛ bibii.
Modbus TCP, yɛ gbɛ kroko nɔ lɛ, tsakeɔ byte fɛɛ byte ni ji binary data lɛ ewoɔ yibɔi enyɔ ni yɔɔ hexadecimal string mli, ni no sɛɛ lɛ akɛtoɔ he kome ni akɛhaa yɛ TCP kood gbɛjianɔtoo mli. Yɛ bɔ ni eyɔɔ mlɛo, anyɛɔ akɛ he fɔ̃ɔ nɔ, kɛ shika babaoo ni akɛtsuɔ nii hewɔ lɛ, akɛtsuɔ nii babaoo yɛ otomashin gbɛjianɔtoi wuji amli, adafitswaa hei, tsumaa otomashin, kɛ nitsumɔhei Intanɛt nibii, ni biɔ shɛɛ sane sɛɛjɛkɛmɔ kɛ be diɛŋtsɛ kɛ shifimɔ taomɔi kɛha adafitswaa tsɔne.
KOnitsumɔ he lɛ
Yɛ nibii afeemɔŋ nitsumɔhe lɛ, akɛ Modbus tsuɔ nii koni akɛtsa nibii afeemɔŋ nibii srɔtoi anɔ ni anyɛ ana be diɛŋtsɛ mli nibii afeemɔ lɛ nɔkwɛmɔ kɛ nɔkwɛmɔ; Yɛ hewalɛ he nitsumɔ mli lɛ, akɛtsuɔ nii kɛkwɛɔ hewalɛ gbɛjianɔtoi ni tsuɔ nii diɛŋtsɛ lɛ anɔ, ni hewalɛ ni anáa kɛjɛɔ mli, nibii ni akɛhaa, kɛ nibii ni ajaa lɛ fata he; Yɛ gbɛfaa nitsumɔ mli lɛ, akɛ Modbus tsuɔ nii kɛhaa maŋtiase mli oketeke gbɛfaa he okadi gbɛjianɔtoi, tsɔne shihilɛ mlikwɛmɔ, kɛ ekrokomɛi; Yɛ tsui ahe nitsumɔ mli lɛ, akɛ Modbus tsuɔ nii yɛ HVAC, kanei, kɛ shweshweeshwefeemɔ gbɛjianɔtoi ni yɔɔ tsui amli lɛ ahe.
Kɛtsɔ nitsumɔhei Intanɛt kɛ Intanɛt nibii ahe ŋaalee ni yaa hiɛ lɛ nɔ lɛ, Modbus hu miifee nibii heei ni ekɛmiiya hiɛ be fɛɛ be koni ekɛ ehe awo nitsumɔhei shihilɛi ni mli wawai ni tsakeɔ lɛ amli. Akɛ nɔkwɛmɔnɔ lɛ, Modbus/TCP miifee nɔ ni akɛtsuɔ nii fiofio kɛha nitsumɔhei Ethernet sanegbaa, ni shinaa nibii ni damɔ Modbus nɔ lɛ haa blema Modbus nibii lɛ kɛ ŋmɛnɛŋmɛnɛ beaŋ tsɔnei lɛ tsaa mlɛo, ni ehaa atatu mli nibii ni akɛtoɔ kɛ saji amlipɛimɔ.
Yɛ kukufoo mli lɛ, Modbus, akɛ nitsumɔhe shɛɛ saji ahe gbɛjianɔtoo ni eda ni akɛtsuɔ nii babaoo lɛ, eye nitsumɔhe nine ni tsuɔ nii diɛŋtsɛ lɛ he ŋaalee ni yaa hiɛ lɛ he odase, ni ekɛ shishitoo kpakpa ema shi kɛha nitsumɔhe nilee ni baaba wɔsɛɛ lɛ. Kɛtsɔ tsɔnei ahe nilee ni yaa hiɛ lɛ nɔ lɛ, Modbus baaya nɔ atsu gbɛfaŋnɔ ko ni he hiaa he nii yɛ nibii heei kɛ tsakemɔi ni baa nitsumɔhei akuu lɛ mli lɛ mli .aloo.