Kev suav ntawm kev hloov pauv ntau
1.switching quantity, analog quantity, pulse quantity switching quantity, tseem hu ua logic quantity, hais txog ob qhov tseem ceeb, 0 lossis 1, ON lossis OFF. Nws yog qhov kev tswj hwm feem ntau siv, kev tswj hwm uas yog qhov zoo ntawm PLC, thiab yog qhov yooj yim tshaj plaws ntawm kev siv PLC.
Lub hom phiaj ntawm kev tswj kev hloov pauv yog ua kom PLC tsim cov kev hloov pauv hloov pauv raws li cov tswv yim tam sim no ua ke ntawm cov keyboards thiab keeb kwm ntawm cov tswv yim sib lawv liag, kom lub kaw lus tuaj yeem ua haujlwm hauv qee qhov kev txiav txim. Yog li ntawd, nws yog qee zaum hu ua sequential control.
Thiab qhov kev tswj hwm tau muab faib ua phau ntawv, semi-automatic lossis tsis siv neeg. Thiab cov ntsiab cai tswj siv yog decentralized, centralized thiab sib xyaw tswj.
2. Analog hais txog qee qhov hloov pauv lub cev tsis tu ncua, xws li voltage, tam sim no, siab, ceev, ntws thiab lwm yam.
PLC yog tsim los ntawm kev qhia txog microprocessor thev naus laus zis rau kev tswj hwm relay, uas tuaj yeem yooj yim thiab ntseeg tau siv rau kev hloov pauv. Raws li analog tuaj yeem hloov mus rau digital, digital tsuas yog hloov pauv ntau yam, yog li cov hloov pauv analog, PLC kuj tuaj yeem ua tiav kev tswj hwm kev tswj hwm.
Vim tias cov txheej txheem tsim khoom tas mus li feem ntau muaj analog, yog li kev tswj hwm analog yog qee zaum hu ua txheej txheem tswj.
Analog feem ntau tsis yog hluav taws xob, thiab PLC tsuas tuaj yeem ua cov digital, hluav taws xob. Txhua yam kom paub qhov hloov dua siab tshiab ntawm lawv kom muaj lub sensor hloov analog rau hauv hluav taws xob digital. Yog hais tias tus nqi hluav taws xob tsis yog tus qauv, tab sis kuj los ntawm lub transmitter, qhov tsis yog tus qauv ntawm cov hluav taws xob rau hauv cov qauv hluav taws xob, xws li 4-20mA, 1-5V, 0-10V thiab lwm yam.
Nyob rau tib lub sij hawm yuav tsum muaj analog input unit (A / D), cov qauv hluav taws xob cov teeb liab rau hauv cov teeb liab; analog output unit (D / A), nyob rau hauv thiaj li yuav ua rau lub PLC ua ntawm cov ntau npaum li cas mus rau hauv analog - txheem hluav taws xob signals.
Yog li tus qauv hluav taws xob teeb liab, kev hloov pauv digital ntawm ntau yam haujlwm yuav tsum tau siv. Qhov no yuav tsum tau qhia meej txog qhov kev daws teeb meem ntawm chav tsev analog thiab tus qauv hluav taws xob teeb liab.
Kev suav ntawm cov lej analog
1. Qhov kev daws teeb meem ntawm PLC analog chav tsev yog 1/32767, tus qauv siv hluav taws xob sib xws yog 0-10V, thiab qhov yuav tsum tau kuaj yog qhov ntsuas kub ntawm 0-100 degree . Tom qab ntawd 0-32767 sib raug rau qhov ntsuas kub ntawm 0-100 degree . Tom qab ntawd xam cov lej digital sib raug rau 1 degree yog 327.67. Yog tias koj xav ua kom qhov ntsuas kub yog qhov tseeb rau 0.1 degree, muab 327.67/10 tuaj yeem ua tau.
2. Analog tswj muaj xws li: kev tawm tswv yim tswj, pub-forward tswj, proportional tswj, fuzzy tswj, thiab lwm yam. Cov no yog tag nrho cov digital quantities nyob rau hauv lub PLC. Cov no yog cov txheej txheem ntawm kev suav cov lej digital hauv PLC.
3. Pulse yog ib qho digital uas nws tus nqi ib txwm hloov ntawm 0 (qib qis) thiab 1 (siab). Tus naj npawb ntawm alternating mem tes hloov ib ob yog hu ua 3, rau zaus.
PLC pulse kom muaj nuj nqis tswj lub hom phiaj yog qhov tseem ceeb ntawm txoj hauj lwm tswj, kev tswj kev txav, kev tswj kev sib tw, thiab lwm yam.
Lub subdivision ntawm stepper tsav tsav yog 10000 ib kiv puag ncig, thiab lub stepper motor yuav tsum tig 90 degrees. Ces tus nqi mem tes yuav tsum tau ua=10000/(360/90)=2500.
1. -10-10V. Qhov voltage ntawm -10V-10V hloov mus rau F448-0BB8Hex (-3000-3000) ntawm 6000 daws teeb meem, thiab rau E890-1770Hex ({{9} }) ntawm 12000 daws teeb meem.
2. 0-10V. 0-10V hloov mus rau 0-1770Hex(0-6000) ntawm 12000 daws teeb meem; thiab 0-2EE0Hex(0-12000) ntawm 12000 daws teeb meem.
3. 0-20mA. 0-20mA tam sim no hloov mus rau 0-1770Hex(0-6000) ntawm 6000 daws teeb meem; 0-2EE0Hex(0-12000) ntawm 12000 daws teeb meem.
4. 4-20mA. 4-20mA tam sim no hloov mus rau 0-1770Hex(0-6000) ntawm 6000 daws teeb meem thiab 0-2EE0Hex(0-12000) ntawm 12000 daws teeb meem.
Cov saum toj no tsuas yog cov lus qhia luv luv, PLC sib txawv muaj qhov sib txawv, thiab lub cev qhov ntau koj ntsuas kom ua tiav ntau yam. Kev suav yuav txawv.
Nco tseg: Yuav tsum muaj rau kev xaim hluav taws xob analog
1. Siv cov hlua khi hlua khi, tab sis tsis txhob txuas cov ntaub thaiv npog
2. Thaum tsis siv cov tswv yim, luv luv V IN thiab COM terminals.
3. cais cov kab teeb liab analog ntawm cov kab hluav taws xob (AC fais fab kab, kab hluav taws xob siab, thiab lwm yam).
4. Thaum muaj kev cuam tshuam ntawm txoj kab hluav taws xob, teeb tsa lub ntsuas hluav taws xob nruab nrab ntawm cov khoom siv hluav taws xob thiab cov khoom siv hluav taws xob.
5. Tom qab paub meej tias qhov kev xaim raug cai, ua kom lub zog ntawm CPU ua ntej thiab tom qab ntawd cov khoom thauj.
6. Txiav tawm lub hwj huam mov mus rau lub load ua ntej, thiab ces txiav tawm lub hwj chim mov mus rau CPU thaum lub hwj chim txiav tawm.
Kev suav ntawm Pulse Amount
Kev tswj cov mem tes yog feem ntau yog siv rau kev tsav tsheb kauj vab, servo lub cev muaj zog lub kaum sab xis tswj, tswj kev deb, txoj hauj lwm. txoj hauj lwm tswj, thiab lwm yam. Cov hauv qab no yog ib qho piv txwv ntawm stepper lub cev muaj zog los qhia txog txhua txoj kev tswj.
1. Lub kaum sab xis tswj ntawm stepper lub cev muaj zog. Ua ntej ntawm tag nrho cov, nws yog ib qhov tsim nyog los qhia meej cov ntsiab lus zoo ntawm stepper lub cev muaj zog, thiab tom qab ntawd txiav txim siab tag nrho cov pulses xav tau rau ib lub kiv puag ncig ntawm stepper motor.
Xam "Angle feem pua = teeb lub kaum sab xis / 360 degree (ie, lub voj voog)" "Angle action mem tes=ib lub voj voog ntawm tag nrho cov pulses * kaum feem pua.
Cov mis yog: Tus naj npawb ntawm lub kaum ntse ntse pulses=- tag nrho cov pulses hauv lub voj voog * (teeb lub kaum sab xis / 360 degree ).
2. Stepper motor nrug tswj. Ua ntej txhais tag nrho cov pulses xav tau rau ib lub kiv puag ncig ntawm stepper lub cev muaj zog. Tom qab ntawd txiav txim siab txoj kab uas hla ntawm stepper lub cev muaj zog rau cov menyuam thiab suav qhov ncig ntawm cov menyuam.
Xam qhov kev ncua deb yuav tsum tau khiav rau txhua tus mem tes. Thaum kawg suav tus naj npawb ntawm cov pulses yuav tsum tau khiav rau qhov kev ncua deb.
Cov mis yog: teem qhov kev ncua deb ntawm tus naj npawb ntawm pulses=teem qhov nrug / [(roller diameter * 3.14) / ib lub voj voog ntawm tag nrho cov pulses]
3. Txoj hauj lwm tswj ntawm lub stepper lub cev muaj zog yog kev sib txuas ntawm lub kaum ntse ntse tswj thiab kev tswj kev deb.
Cov saum toj no tsuas yog ib qho yooj yim tsom xam ntawm stepper lub cev muaj zog tswj, tej zaum yuav muaj qhov sib txawv ntawm qhov tseeb, tsuas yog siv rau cov npoj yaig.
Qhov kev txiav txim ntawm cov kev pabcuam tib lub cev muaj zog yog tib yam li cov stepper lub cev muaj zog, tab sis peb yuav tsum xav txog cov khoom siv hluav taws xob sab hauv ntawm lub servo lub cev muaj zog thiab qhov txo qis ntawm servo lub cev muaj zog.