Cov khaub ncaws hnav zoo li qub thiab cov khau los tiv thaiv zoo li qub yuav tsum tau siv rau lub hwj chim ntsuas ntawm cov khoom siv.
Txoj kev sib txuas lus thoob ntiajteb sib txuas lus yog kom paub cov ntaub ntawv xa tawm ntawm txhua qhov chaw nres tsheb hauv MPI subnet. Txoj kev sib txuas lus yog tsim los ntawm qhov kev pabcuam system, yog li tsis muaj tus neeg siv programming, thiab tsis muaj kev teeb tsa, tab sis sTEP 7 yuav tsum siv cov ntaub ntawv thoob ntiajteb. (GD) txhais. Lub ntsiab lus ntawm lub ntsiab lus tseem ceeb xws li CPU koom rau hauv cov ntaub ntawv thoob ntiaj teb pauv, cov ntaub ntawv xaib thaj tsam, cov ntaub ntawv chaw txais, thiab qhov loj ntawm cov ntaub ntawv pob ntawv. Thoob ntiaj teb cov ntaub ntawv sib txuas lus tsuas yog nqa tawm ntawm S7-300 / 400 PLCs ntawm MPI network.
Ua ntej txhais lub ntiaj teb cov ntaub ntawv pob, thawj qhov uas yuav tsum tau ua yog teeb tsa ib qho MPI subnet hauv STEP 7.
1. Kho qhov MPI subnet
Cov kauj ruam dav dav rau kev tsim ib lub subnet nyob rau hauv STEP 7 yog raws li nram no.
1 Tsim kom muaj ib qhov project. .
2 Xaiv qhov "Options" - "Configure Network" xaiv nyob rau hauv lub SIMATIC Manager interface los sis ob tog MPI hauv SIMATIC Manager interface los qhib NetPro interface.
3 Nyob rau hauv txoj cai qhov rai ntawm NetPro interface, qhib lub nplaub tshev Subnets thiab xaiv hom subnet. Muaj 4 kev xaiv: Indus-trial Ethernet (212 ~ P2 heev), MPI, Profibus, PTP, ob-nias qhov xaiv subnet, hauv NetPro interface. Lub qhov rais laug yuav kawm txog cov kab thiab taw qhia hom npe. Cov xim ntawm txawv subnets sib txawv. Txij li ntawm lub hauv paus ntawm lub subnet lub hom ntawm STEP 7 qhov project yog MPI, cov kauj ruam no yuav raug rho tawm.
4 Tsis tas li ntawd nyob rau hauv lub qhov rais ntawm NetPro interface, qhib qhov chaw ceev, ob-nias los yog luag xaiv cov chaw nres thiab muab lawv tso rau hauv lub qhov rais VI.
5 Nyob rau sab laug ntawm NetPro interface, ob npaug nias ntawm qhov chaw nres tsheb ntxiv, koj tuaj yeem nkag mus rau qhov kho vajtse configuration interface (HWConfig), raws li cov kev taw qhia hauv Tshooj 7 ntawm phau ntawv no, ua kev kho vajtse rau txhua lub chaw nres tsheb.
6 Nyob rau sab laug ntawm NetPro interface, ob npaug nias ntawm kab ntawm MPI (1) subnet, thiab Network Qhov Sib Txuas Sib Tham Xov Xeem yuav nce mus rau qhov sib npaug thiab qhov chaw tshaj tawm. Lub sij hawm MPI pheej xa tawm yog 187.5kbps.
7 Hauv qab ntawm, nias rau ntawm lub thawv me me ntawm MPI qhov chaw nyob hauv txhua lub chaw nres tsheb (xim uas zoo ib yam li cov xim ntawm MPI subnet kab), nav hla lub cuab yeej ntawm qhov chaw sib tham (ntawm no, MPI interface) thiab xaiv hom subnet. Nyob rau hauv cov cuab yeej sib txuas, NetPro tau txais qhov chaw nyob ntawm MPI thiab tso cai rau kev hloov kho.
Los yog, yog tias koj nias rau ntawm qhov nruab nrab ntawm qhov interface, cov lus sib tham ntawm cov khoom sib tham hauv kab lus tso tawm, uas yog cov khoom nruab nrab raug xaiv.
Tom qab cov kauj ruam dhau los, qhov kev tsim ntawm MPI subnet tiav. Cov ntaub ntawv tseem ceeb uas muaj hauv qab no yog:
2. Kev sib txuas lus muaj peev xwm cuam tshuam txhawb S7 kev twb kev txuas
Tsuas yog S7-3. 0/400 cPu txhawb kev sib txuas lus S7. Kev sib txuas lus ntawm kev sib txuas lus tuaj yeem pom tseeb ntawm S7-400 / 400, s7-300 / 400 PLC tsuas tuaj yeem ua kev sib txuas lus ntawm kev sib txuas lus, S7-300 PLC yog neeg rau zaub mov, tau txais thiab teb rau kev nyeem / sau ua haujlwm ntawm s7-400.
Ib qhov kev sib txuas lus kev sib txuas lus uas txhawb S7 kev sib txuas (raws tu qauv). Nco ntsoov tias txij li lub ntsiab ntawm 3 qho ntawm subnets hauv SIMATIc kev sib txuas lus s7 kev sib txuas lus, cov ntsiab lus teev rau hauv Table 10-2 tsis yog tas rau MPI network.
Los ntawm kev pab online ntawm daim ntawv sTEP 7, koj tuaj yeem kawm txog kev siv thiab kev xyuam xim ntawm txhua qhov kev tiv thaiv kev sib txuas lus.
PG / OP kev sib txuas lus yog qhov sib txuas lus tseem ceeb ntawm MPI lub network. Nws tsis yog qhov tsim nyog yuav ua rau kev tswj hwm thiab lub cajmeem ntawm PLC sab kom paub qhov kev sib txuas lus no. Thaum tus neeg teb xov tooj luag los yog kov npauj txuas nrog lub PLC ntawm MPI, qhov kev sib txuas lus tsis raug teeb tsa ntawm tus neeg teb xov tooj luag los yog kov sab siv cov PROTOOL configuration software.
Ib yam li ntawd, thaum kev sib txuas lus ntawm WINCC thiab s7 PLC yog pom los ntawm MPI, nws tsis tsim nyog los txhim kho thiab khoos kas ntawm PLC sab. Nyob hauv WINCC, MPI chaw nres tsheb qhov chaw, tus nab npawb ntawm daim npav thiab network card ntawm CPU yuav tsum tau teeb tsa. P, ofibu. (Txoj Haujlwm Npav Tebchaws) yog lub tsev qhev-qhev uas siv cov tsheb npav tsheb npav rau lub xovtooj thiab qib-theem. Nws yog lub ntiaj teb, qhib, fieldbus tus qauv uas tsis vam khom cov tshuab ntaus ntawv. Nrog Profibus txheem system, automation li ntawm txawv manufacturers sib pauv ntaub ntawv ntawm tib lub interface. Profibus yog tsim rau kev sib pauv ntaub ntawv kev lag luam thiab qib siab tshaj plaws.
Lub Network Profibus yog siv los tsim ib qho kev sib koom nrog kev tswj, uas tuaj yeem tsim kho qhov automation paub tab ua ntau yam "subtasks" thiab tsim tau ntau lub subsystems. Muaj cov ntaub ntawv txuam ceev thiab cov ntaub ntawv sib hloov ntawm subsystems, thiab lub nra ntawm txhua subsystem me me. Tag nrho cov khau tiv thaiv zoo li qub thiab cov kev pabcuam los tiv thaiv zoo li qub muaj kev ceev ceev thiab lub network rov tuaj.
Profibus muaj peb qhov chaw: Profibus-DP (Decentralized Periphery), Pro-fibus-PA (Process Automation), Profibus-FMS (Fieldbus MessageSpecification), feem faib cov I / O systems, kev tswj cov txheej txheem, cog-theem automation nyob rau hauv industrial Enterprise automation.
Lub txheej txheej ntawm Profibus yog RS-485, qhov nruab nrab qhov sib kis yog shielded twisted kab cable (yam ntxwv impedance 150 ~ 2), los yog fiber optic cable. Thaum siv cov ntaub thaiv kev sib tw sib txuam sib luag, cov ntsiab lus ntawm Profibus network yog tib yam nkaus li ntawm MPI qhov network. Cov khau antistatic thiab cov khaub ncaws antistatic yog tib yam, thiab qhov dav hlau tiv thaiv tau muab tso rau ob hnub ntawm ib ntu npav. Qhov chaw ntawm "ON" - qhov no yog tib yam li MPI lub network.
Profibus-PA siv kev sib txuas lus siv tshuab raws li IEC 1158-2 los xyuas kom muaj kev nyab xeeb hauv kev ruaj ntseg. Lub zog ntawm qhov chaw tsheb npav yog muab los ntawm lub tsheb npav. Cov kis tau tus kab mob yog shielded los yog cov hlua khawm tsis sib thooj ntawm ib tus nqi ntawm 31.25 kbps. Ib qho RC terminator txuas nrog txhua qhov kawg ntawm lub tsheb npav, thiab muaj 100 x resistor thiab 1 / F capacitor txuas nrog hauv.
Cov qhev ntawm Profibus PA yeej txuas nrog DP / PA coupler thiab txuas tau ncaj qha mus rau Profi-npav-DP network ntawm DP / PA coupler lossis rau DP network ntawm DP / PA Txuas.