Umhlinzeki wesilawuli ohlelekayo we-Siemens SIMATIC S7-300

Incazelo emfushane:

Uhlolojikelele lwe

I-S7-300

Uhlelo lwe-Modular micro PLC, ukuhlangabezana nezidingo zokusebenza zesikali esimaphakathi nesincane

Amamojula okusebenza ahlukahlukene angaba mahle kakhulu ukuhlangabezana nokuzivumelanisa nomsebenzi wokulawula okuzenzakalelayo

Isakhiwo esisabalalisiwe esilula nesisebenzayo kanye nekhono lenethiwekhi ye-multi-interface, isicelo sivumelana nezimo kakhulu


Imininingwane Yomkhiqizo

Omaka bomkhiqizo

Incazelo yomkhiqizo

Uhlolojikelele lwe

I-S7-300

Uhlelo lwe-Modular micro PLC, ukuhlangabezana nezidingo zokusebenza zesikali esimaphakathi nesincane

Amamojula okusebenza ahlukahlukene angaba mahle kakhulu ukuhlangabezana nokuzivumelanisa nomsebenzi wokulawula okuzenzakalelayo

Isakhiwo esisabalalisiwe esilula nesisebenzayo kanye nekhono lenethiwekhi ye-multi-interface, isicelo sivumelana nezimo kakhulu

Kulula ukuyisebenzisa, idizayini elula, ayikho ifeni

Ukukala okushelelayo njengoba imisebenzi yengezwa

Inani elikhulu lezici ezihlanganisiwe zenza kube namandla kakhulu

I-S7-300F

Isistimu ye-automation ehlulekayo ingahlangabezana nezidingo ezikhulayo zokuphepha zefekthri

Ngokusekelwe ku-S7-300

Iziteshi ezengeziwe ze-ET 200S kanye ne-ET 200M ezisabalalisiwe ze-I/O ezinamamojula avikelekile zingaxhunywa

Ukuxhumana okuhlobene nokuvikeleka kwenziwa nge-PROFIBUS DP kusetshenziswa ikhodi yemboni ye-PROFISAFE

Amamojula ajwayelekile nawo ayatholakala kuzinhlelo zokusebenza ezingahlobene nokuvikela

ukutholakala

Umndeni wesistimu ye-SIMATIC S7-300 / ET 200M uyingxenye ebalulekile yomugqa womkhiqizo okhona ka-Siemens futhi uzovame ukutholakala kuze kube ngu-2023.

Ngokwesitatimende sokuphuma komkhiqizo, le mikhiqizo izonikezwa izingxenye ezisele iminyaka engu-10 eyengeziwe.

1

Siemens S7-300 umphakeli

umsebenzi

I-S7-300

Ihlinzeka ngenani elikhulu lemisebenzi ukusekela ukuhlela komsebenzisi kwe-S7-300, ukulungisa amaphutha kanye nomsebenzi wokulungisa.

Ukucubungula imiyalelo enesivinini esikhulu:

Isikhathi sokwenza imiyalelo siqala ku-4 ns, sivula uhla olusha lonke lwezinhlelo zokusebenza ebangeni lokusebenza eliphansi nelimaphakathi.

Umsebenzi wephoyinti elintantayo:

Ingasebenzisa kahle iphoyinti elintantayo le-arithmetic kanye nemisebenzi ye-arithmetic eyinkimbinkimbi.

Umsebenzi wepharamitha osebenziseka kalula:

I-Parameterization yawo wonke amamojula ingaqedwa kuphela ngethuluzi lesofthiwe eline-interface ehlanganisiwe.Lokhu kwehlisa imigoqo yokungena kanye nezindleko zokuqeqesha.

I-Operator Control and Monitoring (HMI) :

Amasevisi e-HMI asebenziseka kalula ahlanganiswe nesistimu yokusebenza ye-S7-300.Lezi zici azisawudingi umsebenzi wokuhlela obizayo: uhlelo lwe-Simatic HMI lucela ukucubungula idatha evela ku-Simatic S7-300, kanti isistimu yokusebenza ye-S7-300 idlulisela le datha ngokuzenzakalelayo. ngesikhathi sokubuyekeza esilindelekile.Futhi sebenzisa umbhalo ofanayo kanye nesizindalwazi.

Imisebenzi yokuxilonga:

Isistimu yokuxilonga ehlakaniphile ye-CPU ngokuqhubekayo ithola ukusebenza kwesistimu, amalogu emilayezo, nemicimbi ethile yesistimu (isibonelo, amaphutha esikhathi, ukwehluleka kwamamojula, nokunye).Le micimbi imakwa isikhathi futhi igcinwe kusigcinalwazi esiyindilinga ukuze kuxazululwe izinkinga esikhathini esizayo.

Ukuvikelwa kwephasiwedi:

Sebenzisa ukuvikela iphasiwedi ukuze uvikele ulwazi lomsebenzisi ngendlela ephumelelayo futhi enokwethenjelwa ekukopishweni okungagunyaziwe nasezinguqukweni.

I-SIMATIC S7-300 ihlangabezana namazinga alandelayo kazwelonke nawamazwe ngamazwe:

Isitifiketi se-CE

Isitifiketi se-UL

Isitifiketi se-CSA

I-CUlus iqinisekisiwe

CUlus HAZ.LOC.Isitifiketi

Isitifiketi se-FM

Isitifiketi se-ATEX

Ilogo yase-Australia

I-IEC 61131

I-Classification Society Certification

I-ABS (i-American Bureau of Shipping)

I-BV (Veritas Veritas)

I-DNV (Irejista yaseNorway Yokuthumela)

I-GL (Irejista ka-Lloyd Yokuthunyelwa Kwemikhumbi YaseJalimane)

I-LRS (Irejista kaLloyd)

I-Class NK (Japan Classification Society)

Ukuze uthole ulwazi olwengeziwe, sicela ubheke imanuwali "SIMATIC S7-300 Programmable Controller S7-300 Module Data" ukuze uthole idatha yobuchwepheshe evamile / amazinga angu-1.1 nesitifiketi.

2

Umhlinzeki we-CPU ojwayelekile we-Siemens S7-300

6ES7312-1AE14-0AB0 SIMATIC S7-300,CPU 312 ene-MPI interface, amandla ahlanganisiwe angu-24 V DC, indawo yokugcina yokusebenza engu-32 K, kufanele ibe nekhadi le-MMC

6ES7312-5BF04-0AB0 SIMATIC S7-300, CPU 312C, compact CPU ene-MPI, okokufaka kwedijithali okungu-10/6 okukhiphayo kwedijithali, izinto zokubala ezi-2 zesivinini esikhulu (10kHz), amandla ahlanganisiwe angu-24 V DC, indawo yokugcina yokusebenza engu-64 KB, isixhumi sangaphambili (1X 40 pin) idinga ikhadi le-MMC

6ES7313-5BG04-0AB0 SIMATIC S7-300, CPU 313C, i-compact CPU ene-MPI, okokufaka kwedijithali okungu-24/16 okukhiphayo kwedijithali, okokufaka okungu-4 kwe-analog, okukhiphayo okungu-2 kwe-analog 1 PT100,3 izinto zokubala zejubane eliphezulu (30 kHz), amandla ahlanganisiwe angu-24 V DC ,128 KB isitoreji esisebenzayo, isixhumi sangaphambili (1X 40 amaphini) sidinga ikhadi le-MMC

6ES7313-6BG04-0AB0 SIMATIC S7-300, CPU 313C-2 PTP, CompACT CUP ene-MPI, okokufaka kwedijithali okungu-16/16 okukhiphayo kwedijithali, izinto zokubala ezisheshayo ezi-3 (30 kHz), isixhumi esibonakalayo esihlanganisiwe RS485, amandla ahlanganisiwe angu-24V DC, isitoreji esisebenzayo esingu-128KB indawo, isixhumi sangaphambili (1 X 40 izikhonkwane) sidinga ikhadi le-MMC

6ES7313-6CG04-0AB0 SIMATIC S7-300, CPU 313C-2DP, compact CPU with MPI,16 digital input /16 digital output,3 high speed counters (30 kHz), isixhumi esibonakalayo se-DP, amandla ahlanganisiwe angu-24V DC,128KB indawo yokugcina yokusebenza , isixhumi sangaphambili (amaphinikhodi angu-1 X 40) sidinga ikhadi le-MMC

6ES7314-1AG14-0AB0 SIMATIC S7-300, CPU 314 CPU ene-MPI interface, ugesi ohlanganisiwe ongu-24V DC, indawo yokugcina yokusebenza engu-128 KB, kufanele ibe nekhadi le-MMC

Siemens S7-300 umphakeli

6ES7314-6BH04-0AB0 SIMATIC S7-300, CPU 314C-2 PTP uhlobo lwe-CPU ene-MPI, okokufaka kwedijithali okungu-24/16 okukhiphayo kwedijithali, okokufaka kwe-analog oku-4, okuphumayo kwe-analog oku-2, izinto zokubala zesivinini esikhulu ezingu-1T100,4 (60 kHz), isixhumi esibonakalayo esihlanganisiwe RS485 , amandla ahlanganisiwe angu-24V DC, indawo yokugcina yokusebenza engu-192 KB, isixhumi sangaphambili (izikhonkwane ezingu-2 X 40) sidinga ikhadi le-MMC

6ES7314-6CH04-0AB0 SIMATIC S7-300, CPU 314C-2 DP Compaction CPU ene-MPI, okokufaka kwedijithali okungu-24/16 okukhiphayo kwedijithali, okokufaka okungu-4 kwe-analog, okukhiphayo okungu-2 kwe-analog,1 PT100,4 izinto zokubala zejubane eliphezulu (60 kHz), i-DP ehlanganisiwe isixhumi esibonakalayo, amandla ahlanganisiwe angu-24V DC, indawo yokugcina yokusebenza engu-192 KB, isixhumi sangaphambili (izikhonkwane ezingu-2 X 40) sidinga ikhadi le-MMC

6ES7314-6EH04-0AB0 SIMATIC S7-300, CPU 314C-2PN/DP CompACT CPU enendawo yokugcina engu-192 KB, okokufaka kwedijithali okungu-24/16 okukhiphayo kwedijithali, okokufaka kwe-analog okungu-4, okukhiphayo okungu-2 kwe-analog, 1 PT100, 4 isibali esisheshayo (60 kHz ), 1.Ethernet PROFINET, okuhlanganisa 2 PORT Switch, ugesi ohlanganisiwe we-24V DC, Front C

6ES7315-2AH14-0AB0 SIMATIC S7-300, CPU 315-2DP CPU iqukethe i-MPI interface, ukunikezwa kwamandla okuhlanganisiwe okungu-24 V DC, 256 KB isitoreji esisebenzayo 2. I-Interface DP-master /SLAVE, idinga ikhadi le-MMC

6ES7315-2EH14-0AB0 SIMATIC S7-300 CPU 315-2 PN/DP, CPU iqukethe 384 KB indawo yenkumbulo yokusebenza, 1.Ethernet PROFINET, 2 PORT SWITches, kufanele MMC ikhadi

6ES7317-2AK14-0AB0 SIMATIC S7-300, CPU317-2 DP,CPU enendawo yokugcina yokusebenza engu-1 MB, 1. I-Interface MPI/DP 12Mbit /S,2.Interface DP-master /SLAVE, kufanele ibe nekhadi le-MMC

6ES7317-2EK14-0AB0 SIMATIC S7-300 CPU 317-2 PN/DP, CPU enenkumbulo yokusebenza engu-1 MB, 1.Ethernet PROFINET, 2 PORT SWITches, kufanele ibe nekhadi le-MMC

6ES7318-3EL01-0AB0 SIMATIC S7-300 CPU 319-3 PN/DP, CPU enenkumbulo yokusebenza engu-2 MB, 1.Interface MPI/DP 12Mbit /S, 2. Interface DP-master /SLAVE, 3.Interface Ethernet PROFINET, ene 2 UKUSHINTSHWA KWE-PORT, kufanele kube nekhadi le-MMC

3

6ES73211BH020AA0 SIMATIC S7-300, okokufaka kwedijithali SM 321, isolation optical, 16 okokufaka kwedijithali, 24 V DC, 1 X 20 amaphini

6ES73211BH024AA1 SM321 isandiso semojula (6ES73211BH020AA0) SIMATIC S7-300, digitalinput SM321, isolation optical, 16 digital volume input, 24 V DC, 1 X 20 pins kanye SIMATIC S7-300 00 0 isignali J07 ngaphambili, AA 300 isignali ye-300 ES, 6AJ0 isixhumi esingaphambili 2, isixhumi esingu-2 AJ07 ngaphambili

6ES73211BH024AA2 SM321 extension module (6ES73211BH020AA0) SIMATIC S7-300, digital input SM321, Optical isolation, 16 digital volume input, 24 V DC, 1 X 20 pin kanye SIMATIC S7-300, SIMATIC S7-300, i-spring0 isixhumi esingu-160 isixhumi esingaphambili AA 609 20 izikhonkwane

6ES73211BH100AA0 SIMATIC S7-300, okokufaka kwedijithali SM 321, ukuhlukaniswa okungaba khona, okokufaka kwedijithali okungu-16, 24 V DC, izikhonkwane ezingu-20 0.05 MS ukubambezeleka kokufaka

6ES73211BH500AA0 SIMATIC S7-300, okokufaka kwedijithali SM 321, optical isolation 16 digital input, 24 V DC, okokufaka komthombo, 1 X 20 amaphini

6ES73211BH504Aa1 SM321 extension module (6ES73211BH500AA0) SIMATIC S7-300, digital input SM321, optical isolation 16 digital volume input, 24 V DC, okokufaka komthombo, 1 X 20 amaphini kanye ne-SIMATIC S7-30003 yesixhumi esingaphambili se-SIMATIC S7-300J0J0300J0J03007 yemojuli ye-SIMATIC0J0300J ngaphambili) othintana naye, 20 izikhonkwane

6ES73211BH504AA2 SM321 isandiso semojuli (6ES73211BH500AA0) SIMATIC S7-300, digitalinput SM321, optical isolation 16 digital quantity input, 24 V DC, okokufaka komthombo, 1 X 20 izikhonkwane kanye ne-SIMATIC 60 isignali ye-30 yangaphambili ye-30 AA 30 isignali ye-300 yangaphambili ye-AA3000 AA 30 isixhumi se-3000 ngaphambili , 20 izikhonkwane

6ES73211BL000AA0 SIMATIC S7-300, okokufaka kwedijithali SM 321, isolation optical 32 okokufaka kwedijithali, 24 V DC, 1 X 40 amaphini

6ES73211BL004A1 SM321 Imojuli Yokunweba (6ES73211BL000AA0)SIMATIC S7-300, okokufaka kwedijithali SM321, i-optical isolation 32 okokufaka ivolumu yedijithali, 24 V DC, 1 X 40 izikhonkwane kanye ne-SIMATIC S7-300 izikhonkwane ezingu-3 ze-SIMATIC 4 (600000 pre-300, nesikulufa esingu-9 AA 70, nesixhumi esingu-9 AA 7, 9 iphinikhodi engu-9 AA, 900000), ene-9

6ES73211BL004AA2 SM321 isandiso module (6ES73211BL000AA0)SIMATIC S7-300, digital input SM321, optical isolation 32 digital volume input, 24 V DC, 1 X 40 pin kanye SIMATIC S7-300, isignali 3 isixhumi esingaphambili 9AA200, isixhumi esingaphambili se-spring049AA26ES0, isixhumi esingaphambili 30000000000700 isignali ye-3BM0 ngaphambili izikhonkwane

6ES73211BP000AA0 SIMATIC S7-300 okokufaka kwedijithali SM321, i-optical isolation 16 eqenjini, okokufaka kwedijithali okungu-64,DC 24V, 3MS, uhlobo lokudonsa/umthombo

6ES73211CH000AA0 SIMATIC S7-300, okokufaka kwedijithali SM 321, i-optical isolation, okokufaka kwedijithali engu-16, i-AC/DC 24-48V, ENESHANELI ESISODWA NGASINYE, amaphinikhodi angu-40

6ES73211CH200AA0 SIMATIC S7-300, okokufaka kwedijithali SM 321, isolation optical,16 okokufaka kwedijithali, DC 48-125V, 20 amaphini

6ES73211EL000AA0 SIMATIC S7-300, DIGITAL INPUT SM 321, OPTICAL ISOLATION,32 DIGITAL INPUT, 120V AC, 40 STITCHES

6ES73211FF010AA0 SIMATIC S7-300, okokufaka kwedijithali SM 321, isolation optical,8 digital input, 120V/230V AC, 20 izinaliti

6ES73211FF100AA0 SIMATIC S7-300, okokufaka kwedijithali SM 321, isolation optical,8 digital input, 120V/230V AC, 40 pin, 1 IPHUZU NGANYE OKUJWAYELEKILE

6ES73211FH000AA0 SIMATIC S7-300, okokufaka kwedijithali SM 321, i-optical isolation 16 okokufaka kwedijithali, 120/230V AC, 1 X 20 amaphini

6ES73211FH004AA1 SM321 Imojula Yokunweba (6ES73211FH000AA0) SIMATIC S7-300, okokufaka kwedijithali SM321, isolation optical 16 okokufaka ivolumu yedijithali, 120/230V AC, 1 X 20 izikhonkwane ezixhunywe-3060 SPA7 isiginali ye-SIMATIC07, noma i-0J0007 yesiginali ye-SIMATIC207 ngaphambili kwe-SIMATIC007 imojuli ye-0J07, noma i-0J0000 yemojuli yokuxhumana 20 izikhonkwane

6ES73211FH004AA2 SM321 Imojuli Yokunweba (6ES73211FH000AA0) SIMATIC S7-300, okokufaka kwedijithali SM321, i-optical isolation 16 ivolumu yedijithali okokufaka, 120/230V AC, 1 X 20 izikhonkwane 3 isignali engu-3 ye-Spring-300007 SMATIC 2,10007 isignali ye-SIMATIC07,00007 imojula yokuxhumana ye-SIMATIC0701007 ngaphambili we-SIMATIC007 ye-SIMATIC07 ngaphambili 20 izikhonkwane

6ES73217BH010AB0 SIMATIC S7-300, okokufaka kwedijithali SM 321, ukuzihlukanisa okungaba khona, okokufaka kwedijithali okungu-16, i-DC 24V, izinalithi ezingama-20, ilungele ukuphazamiseka kwenqubo, ukuxilongwa

Umhlinzeki wemojula yedijithali ye-Siemens S7-300

6ES73325HB010AB0 SIMATIC S7-300, logic okukhiphayo SM 332, optical isolation, 2 AO, U/I;11/12 bit RESOL., 20 pin., susa/faka ngebhasi elingemuva OKUSEBENZA

6ES73325HB014AB1 SM332 isandiso semojuli (6ES73325HB010AB0) SIMATIC S7-300, ukuphuma okunengqondo SM332, isolation optical, 2 AO, U/I;11/12-bit RESOL., 20 pin., khipha-3 SMATIC0 ibhodi elingemuva le-SIMATIC0 , isixhumi sangaphambili (6ES73921AJ000AA0) semojuli yesignali ene

6ES73325HB014AB2 SM332 isandiso semojuli (6ES73325HB010AB0) SIMATIC S7-300, okuphumayo okunengqondo SM332, isolation optical, 2 AO, U/I;11/12 bit RESOL., 20 pin., khipha/faka i-backboard07, khipha/faka i-backboard ye-SIMATIC07 isixhumi sangaphambili (6ES73921BJ000AA0) semojuli yesiginali nge

6ES73325HD010AB0 SIMATIC S7-300, logic okukhiphayo SM 332, optical isolation, 4 AO, U/I;Diagnosis;Resolution 11/12 bit, 20 pin, susa/faka W. Active, ibhasi elingemuva

6ES73325HD014AB1 SM332 isandiso semojula (6ES73325HD010AB0) SIMATIC S7-300, okuphumayo okunengqondo SM332, isolation optical, 4 AO, U/I;Diagnosis;Isixazululo 11/12 bit, 20rtboard pin, i-backboard ye-S Active/I-Active 300, isixhumi sangaphambili (6ES73921AJ000AA0) se-SIGN

6ES73325HD014AB2 SM332 isandiso semojula (6ES73325HD010AB0) SIMATIC S7-300, ukuphuma okunengqondo SM332, isolation optical, 4 AO, U/I;Diagnosis;Resolution 11/12 bit, 20 rtboard backboard, khipha i-Active/I-Active 300, isixhumi sangaphambili (6ES73921BJ000AA0) se-Signa

6ES73325HF000AB0 SIMATIC S7-300, LOGIC OUTPUT SM 332, OPTICAL ISOLATION, 8 AO, U/I;Ukuxilongwa;Ukulungiswa 11/12 bit, 40 pin, susa/faka W. Iyasebenza, ibhasi elingemuva

6ES73325HF004AB1 SM332 isandiso semojula (6ES73325HF000AB0) SIMATIC S7-300, logicaloutput SM332, optical isolation, 8 AO, U/I;Diagnosis;Resolution 11/12 bit, susa/40 i-backboard, i-backboard 40, i-Winse 40, i-backboard , isixhumi sangaphambili (6ES73921AM000AA0) 392 nge

6ES73325HF004AB2 SM332 isandiso semojula (6ES73325HF000AB0) SIMATIC S7-300, logicaloutput SM332, optical isolation, 8 AO, U/I;Diagnosis;Resolution 11/12 bit, susa/i-Active3-back 40pin IC, 40pin IC, i-backboard ye-SIMATIC , isixhumi sangaphambili (6ES73921BM010AA0) se-SIG

6ES73327ND020AB0 Simatic S7-300, AnalogausGabesm 332, Kanalweise Potre.I-GETR., 4 AA, Aufloesung 16 Bit, 0-10V,1-5V, +/-10V, +/ -20mA, 0/4-20mA, 20-polig, Simatic S7,SM 33216-bit resolution,0-10V , 1-5V, +/-10V, +/ -20mA, 0/4-20

Umhlinzeki wesifanekiso sesignali ye-Siemens S7-300

4

Ama-CPU angama-22 ahlukene:

Ama-CPU ajwayelekile angu-7 (CPU 312,CPU 314,CPU 315-2 DP,CPU 317-2 PN/DP,CPU 317-2 DP,CPU 317-2 PN/DP,CPU 319-3 PN/DP)

6 CompACT CPUs (namakhono ahlanganisiwe ezobuchwepheshe kanye ne-I/O) (CPU 312C, CPU 313C, CPU 313C-2 PTP, CPU 313C-2 DP, CPU 314C-2 PTP, CPU 314C-2 DP, CPU 314C-2 PN/ DP)

Ama-CPU angu-5 angaphumeleli (CPU 315F-2 DP, CPU 315F-2 PN/DP, CPU 317F-2 DP, CPU 317F-2 PN/DP, CPU 319F-3 PN/DP)

3 I-Technical CPU(CPU 315T-3 PN/DP,CPU 317T-3 PN/DP,CPU 317TF-3 PN/DP)

Kukhona futhi ama-CPU angu-25 atholakalayo ezinhlobonhlobo zamazinga okushisa azungezile kanye nemithwalo ephakathi

Inamabanga okusebenza ahlukene ukuhlangabezana nezinhlelo zokusebenza ezahlukene

umsebenzi

I-SIMATIC S7-300 CPU inokusebenza okuphezulu, izidingo zesikhala esincane kanye nezindleko zokulungisa ezincane, ngaleyo ndlela ithuthukise ukusebenza kwezindleko.

Ijubane eliphezulu lokucubungula;

Isibonelo, ku-CPU 315-2 DP, ukusebenza kancane kungu-0.05 μs, ukusebenza kwephoyinti elintantayo ngu-0.45;

Ku-CPU 319-3 PN/DP, ukusebenza kancane kungu-0.004 μs, ukusebenza kwephoyinti elintantayo ngu-0.04 μs

Inombolo yesandiso

I-SIMATIC miniature memory card (MMC) njengememori elayishayo:

Iphrojekthi ephelele, kuhlanganise nezimpawu namazwana, ingagcinwa ku-MMC.Imisebenzi yokuFunda/yokubhala nayo ingenziwa ngemodi ye-RUN.Lokhu kunganciphisa izindleko zesevisi.

Gcina idatha ye-RAM ku-MMC ngaphandle kwebhethriSiemens S7-300 umphakeli

Uhlolojikelele lwe

Imojuli ye-I/O ifanele i-SIMATIC S7-300:

Imojula yobuningi bedijithali

Imojuli yobuningi be-analog

F Digital/analogi module

Imojuli yokulinganisa yedijithali engaqhumisi

Imojuli ye-analogi yohlobo olungaqhumi

Imojula yomsebenzi

Iphrosesa yokuxhumana

Imojula ekhethekile

Ukuxhumana

Ukupakisha kanye Nezokuthutha

4

  • Okwedlule:
  • Olandelayo:

  • sesha isizinda sakho

    I-Mirum est notare quam littera gKuyiqiniso elaziwa kudala ukuthi umfundi uzophazanyiswa okuqukethwe okufundekayo kwekhasi lapho ebuka isakhiwo salo.