Cov Lus Qhia PLC Cov Lus Qhia thiab Lawv Cov Ntawv Thov

I. Kev Taw Qhia

Hauv kev lag luam automation, programmable logic controllers (PLCs) tau dhau los ua cov cuab yeej tseem ceeb rau kev tswj ntau yam khoom siv tshuab thiab cov txheej txheem kev lag luam vim lawv qhov kev ntseeg siab thiab yooj yim. Los ntawm kev ua raws li cov lus qhia tswj, PLCs ua kom muaj kev tswj hwm thiab ua kom zoo ntawm cov kab ntau lawm. Tsab ntawv xov xwm no yuav muab cov ncauj lus qhia ntxaws ntxaws txog kev siv PLC tswj cov lus qhia, suav nrog lawv cov haujlwm yooj yim, daim ntawv thov scenarios, thiab cov txheej txheem programming, nrog rau lub hom phiaj ntawm kev ua haujlwm rau cov kws ua haujlwm thiab cov neeg ua haujlwm.

II. Txheej txheem cej luam ntawm PLC Tswj Cov Lus Qhia

PLC tswj cov lus qhia yog cov ntsiab lus tseem ceeb ntawm PLC programming lus. Lawv piav qhia txog yuav ua li cas PLC tswj cov kev hloov pauv hauv cov khoom tso tawm raws li cov xwm txheej ntawm cov teeb liab tawm tswv yim, yog li ua kom muaj kev tswj hwm ntawm cov cuab yeej siv tshuab. Muab faib los ntawm kev ua haujlwm, PLC tswj cov lus qhia feem ntau suav nrog cov hauv qab no:

Cov lus qhia ua haujlwm logic

• Logic Input thiab Coil Drive Instructions (LD, LDI, OUT): Siv los txheeb xyuas cov xwm txheej ntawm cov teeb liab tawm tswv yim thiab, raws li qhov xwm txheej ntawd, tswj qhov ua kom lossis deactivation ntawm cov zis coils.
• Serial thiab Parallel Logic Instructions (AND, ANI, LOSSIS, ORI): Siv los ua cov haujlwm serial thiab parallel logic ntawm ntau lub tswv yim tawm tswv yim.
• Circuit Block Connection Instructions (ANB, ORB): Siv los ua ke ntau lub logic blocks hauv serial lossis parallel configurations.
• Logic Operation Result Inversion Instructions (INV): Siv los hloov cov txiaj ntsig ntawm kev ua haujlwm logic.

Cov lus qhia Timer/Counter

• Cov Lus Qhia Timer: Siv los tsim cov teeb liab tso tawm tom qab lub sijhawm teev tseg, siv cov haujlwm xws li kev ncua sijhawm thiab kev tswj xyuas lub sijhawm.
• Counter Instructions: Siv los suav cov naj npawb ntawm cov pulses los ntawm cov teeb liab tawm tswv yim; thaum cov pulse suav mus txog tus nqi teev, cov teeb liab tso zis yog generated, siv zog xws li suav tswj.

Cov lus qhia ua cov ntaub ntawv

• Cov lus qhia hloov pauv (BCD_I-hloov BCD code rau tus lej; I_BCD-hloov tus lej rau BCD code, thiab lwm yam): Siv los hloov pauv ntawm ntau hom ntaub ntawv.
• Cov lus qhia ua haujlwm lej (ADD, SUB, MUL, DIV, thiab lwm yam): Siv los ua cov lej lej xws li ntxiv, rho tawm, sib faib, thiab faib cov ntaub ntawv.
• Cov lus qhia sib piv (CMP? I rau qhov sib piv sib piv, CMP? D rau ob npaug- sib piv cov lej, thiab lwm yam): Siv los sib piv cov nqi ntawm ob cov ntaub ntawv thiab tsim cov teeb liab tso tawm raws li qhov txiaj ntsig sib piv.

Tswj Flow Instructions

• Cov Lus Qhia Tseem Ceeb (MC, MCR): Siv los siv cov kev pab cuam branching thiab voj tswj.
• Jump Instructions (JMP): Siv los dhia mus rau lwm qhov chaw hauv qhov kev pab cuam kom ua tiav.
• Hu / Rov Qhia Cov Lus Qhia (CALL, RET): Siv los hu thiab rov qab los ntawm cov txheej txheem subroutines.

Input/Output Cov Lus Qhia

• Input Instructions (XIC, XIO): Siv los nyeem cov xwm txheej ntawm cov teeb liab tawm tswv yim.
• Cov lus qhia tso zis (OTE, OTL, OTU): Siv los tswj lub xeev ntawm / tawm ntawm cov teeb liab tawm.

III. Programming Ua raws li cov lus qhia PLC tswj

Thaum lub sijhawm PLC programming, cov lus qhia tswj kom tsim nyog yuav tsum raug xaiv raws li cov kev xav tau tiag tiag, thiab qhov kev zov me nyuam yuav tsum tau ua raws li cov txheej txheem tshwj xeeb. Cov hauv qab no yog cov piv txwv programming rau qee cov lus qhia uas nquag siv:

Programming Ua raws li cov lus qhia ua haujlwm logical

Piv txwv li, txhawm rau ua kom muaj kev tswj xyuas kev pib thiab nres lub cev muaj zog, koj tuaj yeem siv cov lus qhia AND thiab cov lus qhia kauj tsav (LD, LDI, OUT) nrog rau cov lus qhia sib txuas thiab sib txuas (AND, ANI, OR, ORI). Cov txheej txheem programming tshwj xeeb yog raws li hauv qab no:

Thaum nias lub pob pib (I0.0 nquag), siv LD cov lus qhia los nyeem cov teeb liab raws li txoj cai, thiab siv OUT cov lus qhia los tsav lub cev muaj zog pib tawm (Q0.0 yog nquag).

Thaum nias lub khawm nres (I0.1 ua haujlwm), siv LDI cov lus qhia los nyeem cov teeb liab raws li txoj cai, thiab siv AND cov lus qhia los txuas rau hauv series nrog lub cev muaj zog pib tawm, yog li nres lub cev muaj zog (Q0.0 yog deactivated).

Programming Ua raws li cov lus qhia Timer/Counter
Piv txwv li, txhawm rau siv qhov kev ncua ncua kev tswj xyuas logic, cov lus qhia timer tuaj yeem siv. Cov txheej txheem programming tshwj xeeb yog raws li hauv qab no:

Thaum yuav tsum tau kaw lub sijhawm ncua, pib lub sijhawm (TON T0 K10) thiab teem sijhawm ncua mus rau 10 vib nas this.

Thaum lub sijhawm teem sijhawm mus txog lub sijhawm teem tseg (T0.DONE yog nquag), siv cov lus qhia OUT los tsav lub kaw lus tawm (Q0.1 yog nquag).

Programming Implementation of Data Processing Instructions

Piv txwv li, txhawm rau ua raws li kev tswj hwm kev nyeem ntawv thiab sib piv cov ntaub ntawv kub, koj tuaj yeem siv cov lus qhia hloov dua siab tshiab thiab sib piv. Cov txheej txheem programming tshwj xeeb yog raws li hauv qab no:

Siv cov analog input module los nyeem cov ntaub ntawv ntsuas kub (AIW0), thiab siv cov lus qhia hloov pauv hloov mus rau hom integer (D0).

Siv cov lus qhia sib piv (CMP? D) los sib piv D0 nrog rau qhov ntsuas kub, thiab tsim cov teeb liab tso zis (xws li lub tswb ceeb toom) raws li qhov sib piv.

IV. Daim Ntawv Thov Scenario rau PLC Tswj Cov Lus Qhia

PLC tswj cov lus qhia tau dav siv hauv kev lag luam automation; lawv tuaj yeem siv ntau yam kev tswj xyuas logics thiab kev ua haujlwm automation raws li qhov xav tau tiag tiag. Cov hauv qab no yog cov ntawv thov tshwj xeeb ntawm PLC tswj cov lus qhia hauv ntau qhov xwm txheej:

Muaj Automation

• Kev Tswj Kab Ntau Lawm: Siv cov lus qhia ua haujlwm logic thiab timer/counter cov lus qhia, PLC ua tiav kev tswj hwm ntau yam khoom ntawm cov kab ntau lawm, xws li cov neeg hlau txav, siv txoj siv hlua pib / nres, thiab ntim tshuab suav. Los ntawm kev ua haujlwm, PLC ua kom muaj kev ua haujlwm zoo thiab ruaj khov ntawm cov kab ntau lawm.
• Kev Tswj Neeg Hlau: Hauv kev tswj cov neeg hlau, PLCs ua kom muaj kev ua haujlwm ntawm cov neeg hlau los ntawm kev tswj tsis tau xws li cov lus tsa suab, nrawm, thiab txoj haujlwm. Piv txwv li, hauv cov txheej txheem xws li vuam, sib dhos, thiab pleev xim, PLCs tuaj yeem coj cov neeg hlau los ua cov haujlwm raws li cov kev pabcuam preset.

Kev Lag Luam Hluav Taws Xob

• Switchgear thiab Power Distribution Cabinet Control: Hauv kev lag luam hluav taws xob hluav taws xob, PLCs feem ntau yog siv los tswj cov khoom siv xws li cov khoom siv hluav taws xob thiab cov khoom siv hluav taws xob faib hluav taws xob, ua kom cov chaw taws teeb saib xyuas thiab ua haujlwm. Los ntawm cov lus qhia logic thiab I / O cov lus qhia, PLCs tuaj yeem saib xyuas cov xwm txheej ntawm cov khoom siv hluav taws xob, tswj nws qhov kev hloov thiab kev ua haujlwm, thiab txhim kho kev ruaj ntseg thiab kev nyab xeeb ntawm lub zog hluav taws xob.

Kev thauj mus los

• Traffic Signal Control: Siv logic thiab timer cov lus qhia, PLCs tswj kev ua kom, deactivation, thiab hloov cov teeb liab tsheb los ua kom tsis siv neeg lub teeb liab hloov. Qhov no pab txhim kho tsheb khiav thiab txhim kho txoj kev ua haujlwm zoo.
• Kev Tswj Tus Hu Xov Tooj Plaza: PLCs tuaj yeem tswj cov khoom siv ntawm cov chaw hu xov tooj - xws li cov teeb meem tsis siv neeg thiab cov ntxaij vab tshaus tso tawm - txhawm rau ua kom paub lub tsheb tsis siv neeg thiab kev them nqi. Qhov no txo ​​qhov kev ua yuam kev cuam tshuam nrog kev ua haujlwm ntawm phau ntawv thiab txhim kho kev ua haujlwm ntawm cov chaw hu xov tooj.

Environmental Protection Kev lag luam

• Kev Tiv Thaiv Kev Kho Dej: PLCs tswj cov twj tso kua mis, cov khoom siv tshuaj lom neeg, li qub, thiab lwm yam khoom siv los kho cov dej khib nyiab. Siv cov logic thiab cov ntaub ntawv ua cov lus qhia, PLCs tuaj yeem saib xyuas cov dej tsis zoo hauv lub sijhawm, kho cov txheej txheem kho, thiab xyuas kom meej tias cov dej ntws zoo raws li cov qauv.

Kev lag luam kho mob

• Kev Tswj Cov Khoom Siv Kho Mob: PLCs tuaj yeem siv los tswj cov khoom siv kho mob xws li cov rooj ua haujlwm thiab lub teeb phais hauv chav ua haujlwm, nrog rau cov txaj pw hauv tsev kho mob hauv cov chav neeg mob. Los ntawm cov lus qhia thiab cov tswv yim / tso zis, PLCs ua kom muaj kev ua haujlwm zoo thiab kev nyab xeeb ntawm cov khoom siv kho mob.
• Kev tswj kub thiab av noo: Hauv ib puag ncig xws li chav ua haujlwm thiab chaw kuaj mob, PLCs saib xyuas ib puag ncig ntawm qhov ntsuas kub thiab av noo thiab tswj xyuas qhov kub thiab av noo los ntawm kev tswj cov cua sov, cua txias, humidification, lossis dehumidification khoom.

Tsev Automation

• Kev tswj teeb pom kev zoo: PLCs tuaj yeem tsim kho kom muaj kev tswj hwm lub tsev teeb pom kev zoo, xws li lub sijhawm teem sijhawm rau / tawm, qhov chaw teeb tsa, thiab kho qhov ci. Qhov no pab txhim kho lub tsev lub zog ua haujlwm thiab kev nplij siab ntawm cov neeg nyob.
• HVAC Control: PLCs tuaj yeem saib xyuas qhov ntsuas sab hauv tsev xws li qhov kub thiab txias, thiab hloov kho cov haujlwm ntawm HVAC systems raws li preset tswj cov tswv yim kom ua tiav qhov sib npaug ntawm kev txuag hluav taws xob thiab kev nplij siab.

Ua liaj ua teb

• Agricultural Machinery Control: PLCs tuaj yeem tswj kev ua haujlwm ntawm cov tshuab ua liaj ua teb, xws li cov noob qoob loo thiab cov qoob loo. Los ntawm kev ua haujlwm, PLCs xyuas kom meej tias cov tshuab ua liaj ua teb ua haujlwm raws li txoj kev npaj ua ntej thiab ntawm qhov nrawm nrawm, yog li txhim kho kev ua liaj ua teb ua haujlwm.
• Irrigation Control: PLCs tuaj yeem hloov kho qhov kev khiav hauj lwm thiab cov dej ntim ntawm cov khoom siv dej raws li cov yam ntxwv xws li av noo thiab cov qoob loo loj hlob, ua kom cov dej muaj tseeb thiab dej - txuag dej.

Raws li pom los ntawm daim ntawv thov scenarios tau piav qhia saum toj no, PLC tswj cov lus qhia tau dav siv thoob plaws ntau yam, suav nrog kev lag luam automation, kev lag luam hluav taws xob, kev thauj mus los, kev tiv thaiv ib puag ncig, kev kho mob, tsev automation, thiab kev ua liaj ua teb. Lawv muab kev txhawb zog rau kev siv ntau yam ntawm kev tswj cov logic thiab cov haujlwm automation.