Modbus Kɔmyunikeshɔn: Di Ki fɔ Bil Simlɛs Indastrial Nɛtwɔk
Modbus Kɔmyunikeshɔn: Di Ki fɔ Bil Simlɛs Indastrial Nɛtwɔk
Ovaviu fɔ di tin dɛn we dɛn dɔn lan
Modbus na wan protɔkɔl we dɛn kin yuz bɔku tɛm na di industrial fil, we dɛn bin mek insay 1979 fɔ mek dɛn ebul fɔ tɔk to dɛnsɛf bitwin ɔtomɛshɔn divays dɛn. Modbus bin ɔrizinali implimɛnt as aplikeshɔn lɛvɛl protɔkɔl fɔ transmit data tru di siriɔs layt, ɛn naw dɛn kin ɛkstɛnd am bak fɔ implimɛnt tru siriɔs, TCP/IP, ɛn Yuza Datagram Prɔtokɔlɔ (UDP). Dis dɔkyumɛnt de gi wan dip intapriteshɔn fɔ di protɔkɔl implimɛnt.
Wetin na Modbus protɔkɔl?
Modbus na wan rikwest rispɔns protɔkɔl we dɛn impruv tru wan masta-slev rilayshɔn. Insay masta-slev rilayshɔn, kɔmyunikeshɔn kin apin ɔltɛm tu tu (divays fɔ bigin wan riŋwe ɛn afta dat i wet fɔ ansa), ɛn di divays we de aks (masta divays) na in gɛt di wok fɔ bigin ɛni intarakshɔn. Tipikli, di praymari divays na mɔtalman-mashin intafɛs (HMI) ɔ monitarin ɛn data akwyeshɔn (SCADA) sistem, we di sɛkɔndari divays dɛn na sɛns, programmabl lɔjik kɔntrol (plcs), ɔ programmabl ɔtomɛshɔn kɔntrol (PAC). Di tin dɛn we de insay dɛn rikwest ɛn ansa ya, ɛn bak di nɛtwɔk layt we de sɛn dɛn mɛsej ya, na difrɛn layers dɛn na di protɔkɔl de difayn am.
Us divays dɛn de sɔpɔt Modbus protɔkɔl?
Di Modbus protɔkɔl gɛt bɔku sɔpɔt frɔm divays dɛn, we inklud programmabl lɔjik kɔntrol (PLC), rimot tɛminal yunit (RTU), sɛns, aktyuator, mɔtalman-mashin intafɛs (HMI), ɛn bɔku ɔda kayn divays dɛn we de na industrial ɔtomɛshɔn ɛn industrial fil dɛm. Dipatmɛnt fɔ Kɔntrol di Prɔses. Modbus na wan we dɛn de yuz bɔku bɔku wan ɛn i dɔn bi di de facto standad fɔ inta-ɔparabiliti bitwin divays dɛn we difrɛn manifakta dɛn mek pan fild dɛn lɛk manufakchurin, ɛnaji, transpɔt, ɛn bildin ɔtomɛshɔn.
Modbus getway na divays we de kɔnvɔyt di kɔmyunikeshɔn protɔkɔl we di industrial ɔtomɛshɔn sistɛm nɛtwɔk hab dɛn de yuz. I de kɔmyuniket wit smat divays dɛn, gɛda data frɔm di lɔwa lɛvɛl divays dɛn ɛn transmit am to di Modbus get, i de mek kɔnɛkshɔn wit di ɔpa kɔmpyuta nɛtwɔk, ɛn i de du Modbus protɔkɔl wit nɛtwɔk kɔmpyuta dɛn.
Modbus kɔmyunikeshɔn mɔd
Di Modbus protɔkɔl gɛt tri men kɔmyunikeshɔn mɔd dɛn:
lRTU (Rimot Tɛminal Yunit) .
lASCII (Amɛrikan Stɛndad Kɔd fɔ Infɔmeshɔn Intɛchɛnj) .
lTCP/IP (Transmishɔn Kɔntrol Prɔtokɔlɔ/Intanɛt Prɔtokɔlɔ) .
Insay di Modbus protɔkɔl, Modbus TCP ɛn Modbus RTU na di tu kɔmyunikeshɔn we dɛn kin yuz mɔ. Pan ɔl we dɛn ɔl mek fɔ mek i izi fɔ chenj data bitwin divays dɛn, sɔm impɔtant difrɛns dɛn de pan di we aw dɛn de impruv dɛn ɛn di we aw dɛn de yuz dɛn.
Di we aw dɛn kin tɔk to dɛnsɛf ɛn di we aw dɛn kin spid
Modbus TCP de yuz di TCP/IP protɔkɔl stak fɔ data transmishɔn ova nɛtwɔk, we de abop pan nɛtwɔk infrastukchɔ lɛk Itanɛt fɔ ajɔst ay-spid ɛn big-big data transmishɔn.
Modbus RTU, na di ɔda say, de transmit data tru siriɔs layn dɛn lɛk RS-485 ɛn RS-232, we gɛt rili slo transmishɔn spid. Data transmishɔn ɛn aplikeshɔn sɛnɛriɔ.
Modbus RTU de kapsul data freym dɛn insay wan kɔmpakt baynary fɔmat, inklud adrɛs fil dɛn, fɛnshɔn kɔd dɛn, data, ɛn chɛksam fil dɛn. Dis fɔmat de transmit fayn fayn wan insay baynary fɔm, we de mek i fayn fɔ rial-taym ɔ lokal kɔntrol aplikeshɔn, mɔ na say dɛn we nɔ gɛt nɛtwɔk infrastukchɔ we dɔn de, lɛk industrial ɔtomɛshɔn sayt dɛn, ɛmbaded sistɛm dɛn, sɛns nɛtwɔk dɛn, ɛn smɔl kɔntrol sistɛm dɛn.
Modbus TCP, na di ɔda say, de kɔnvɔyt ɛni bayt pan baynary data to wan fiks tu dijit heksadesimal string, we dɛn kin kɔnkaten togɛda ɛn transmit insay TCP kɔd fɔmat. Bikɔs i simpul, i rili izi, ɛn i nɔ de tek bɔku mɔni, dɛn de yuz am bɔku bɔku wan na big big ɔtomɛshɔn sistem, data sɛnta, bildin ɔtomɛshɔn, ɛn industrial Intanɛt ɔf Tin dɛn, we nid lɔng kɔmyunikeshɔn distans ɛn ay rial-taym ɛn stebiliti rikwaymɛnt fɔ data transmishɔn.
WANpplication eria
Insay di manufakchurin industri, dɛn de yuz Modbus fɔ kɔnɛkt difrɛn prodakshɔn ikwipmɛnt ɛn ajɔst rial-taym monitarin ɛn kɔntrol fɔ di prodakshɔn prɔses; Insay di fild fɔ ɛnaji, dɛn kin yuz am fɔ di ɔtomɛshɔn manejmɛnt fɔ pawa sistɛm, inklud pawa jenɛreshɔn, transmishɔn, ɛn distribyushɔn prɔses; Insay di transpɔt industri, dɛn de yuz Modbus fɔ ɔban rel transit signal sistem, fɔ wach aw motoka dɛn de, ɛn ɔda tin dɛn; Insay di fild fɔ bildin ɔtomɛshɔn, dɛn de yuz Modbus fɔ HVAC, layt, ɛn sikyɔriti sistem dɛn na bildin dɛn.
Wit di divɛlɔpmɛnt fɔ industrial Intanɛt ɛn Intanɛt ɔf Tin dɛn teknɔlɔji, Modbus de bak ɔltɛm fɔ mek nyu tin dɛn ɛn ɔpgrɛd fɔ adap to mɔ kɔmpleks ɛn chenj industrial sɛnɛriɔ dɛn. Fɔ ɛgzampul, Modbus/TCP de bi di men standad fɔ industrial Itanɛt kɔmyunikeshɔn smɔl smɔl, ɛn getway divays dɛn we de bays pan Modbus de mek tradishɔnal Modbus divays dɛn ebul fɔ kɔnɛkt to mɔdan nɛtwɔk dɛn izi wan, we de mek dɛn ebul fɔ kip di klawd ɛn analayz di data.
Fɔ sɔmtin, Modbus, as machɔ ɛn we dɛn de yuz bɔku bɔku wan fɔ di industrial kɔmyunikeshɔn protɔkɔl, dɔn witnɛs di prɔgrɛs we industrial ɔtomɛshɔn teknɔlɔji de du ɛn i dɔn le wan sɔlid fawndeshɔn fɔ di fiuja industrial intɛlijɛns. Wit di kɔntinyu divɛlɔpmɛnt fɔ teknɔlɔji, Modbus go kɔntinyu fɔ ple impɔtant pat fɔ drɛb inovashɔn ɛn chenj na di industrial sɛktɔ.