Lub CAN (Controller Area Network) txoj kev tsheb npav thiab PROFIBUS (Process Field Bus) raws tu qauv muaj qhov sib txawv ntawm lub davhlau ya nyob twg uas yuav tsum tau ua thaum siv M12 connector. Qhov no yog vim lub cev txheej txheem thiab cov teeb liab kis tau tus mob ntawm ob txoj cai sib txawv.
CAN tsheb npav raws tu qauv
1. Terminal resistors
CAN npav raws tu qauv yuav tsum muaj lub davhlau ya nyob twg resistor txuas rau txhua qhov kawg ntawm lub npav. Feem ntau, tus nqi ntawm cov resistors yog 120 ohms.
2. Muaj nuj nqi
Lub luag haujlwm tseem ceeb ntawm lub davhlau ya nyob twg resistor yog los tiv thaiv lub teeb liab los ntawm kev xav ntawm qhov kawg ntawm lub tsheb npav, yog li ua kom muaj kev ntseeg siab. Lub tsheb npav CAN yog ib txoj kev sib txawv ntawm cov teeb liab kis tau tus mob, thiab lub davhlau ya nyob twg resistor pab phim lub impedance ntawm lub tsheb npav thiab txo cov teeb liab reflections.
3. Qhov chaw
Lub davhlau ya nyob twg resistor yuav tsum tau muab tso rau ntawm lub cev kawg ntawm lub npav kom paub meej cov yam ntxwv hluav taws xob ntawm lub npav.
PROFIBUS raws tu qauv
1. Termination resistor
PROFIBUS raws tu qauv kuj xav tau kev teeb tsa ntawm kev txiav tawm cov resistors ntawm ob qho kawg ntawm lub npav. RauPROFIBUS DP (Decentralized Peripherals), qhov kev txiav tawm resistor feem ntau yog 220 ohms. RauPROFIBUS PA (Process Automation), qhov kev txiav tawm tus nqi resistor yuav txawv, tab sis nws kuj yog rau impedance txuam thiab teeb liab kev ncaj ncees.
2. Muaj nuj nqi
Zoo ib yam li CAN tsheb npav, kev ua haujlwm ntawm PROFIBUS davhlau ya nyob twg resistor yog los tiv thaiv kev cuam tshuam cov teeb liab thiab xyuas kom muaj kev ntseeg siab ntawm cov ntaub ntawv xa mus.
3. Txoj hauj lwm
Lub davhlau ya nyob twg resistor yuav tsum tau nruab rau ntawm ob qho kawg ntawm PROFIBUS network.
4. Nyob rau hauv PROFIBUS raws tu qauv, peb-kuj configuration feem ntau yog hais txog ib tug tshwj xeeb kev twb kev txuas txoj kev ntawm lub network davhlau ya nyob twg resistor, uas yog muaj nyob rau hauv PROFIBUS DP (Decentralized Peripherals). Cov hauv qab no yog cov lus piav qhia ntxaws txog kev teeb tsa peb-resistance:
PROFIBUS DP davhlau ya nyob twg resistor configuration
Hauv PROFIBUS DP network, lub davhlau ya nyob twg resistor yog siv los ua kom haum rau lub tsheb npav impedance kom ntseeg tau tias kev ncaj ncees thiab kev ntseeg siab ntawm cov teeb liab kis tau tus mob. Peb-tiv thaiv configuration yog raws li nram no:
- Ob qhov sib txuam resistors: Ob lub resistors no feem ntau yog 220 ohms thiab txuas ntawm kab A (cov ntaub ntawv +, feem ntau ntsuab) thiab B kab (cov ntaub ntawv -, feem ntau yog liab) ntawm PROFIBUS thiab Vcc (+5V).
- Ib tug rub-down resistor: Qhov no resistor feem ntau yog 390 ohms thiab txuas ntawm B kab (cov ntaub ntawv -, liab) thiab hauv av (GND).
Function Description
- Ob 220 ohm resistors: Cov resistors no yog siv los ua kom haum rau cov yam ntxwv impedance ntawm lub tsheb npav los tiv thaiv kev cuam tshuam cov teeb liab.
- Ib tug 390 ohm resistor: Qhov resistor no yog siv los rub cov kab B mus rau hauv av muaj peev xwm thaum tsis muaj kev tsav tsheb los xyuas kom lub xeev ruaj khov thaum lub tsheb npav tsis ua haujlwm.
Kev siv tswv yim
Terminal resistors yuav tsum tau teeb tsa ntawm ob qho kawg ntawm PROFIBUS network, thiab peb qhov resistors yuav tsum tau txuas rau ntawm txhua qhov kawg hauv qhov saum toj no. Qhov kev teeb tsa no tuaj yeem ua tiav los ntawm qhov tshwj xeeb lub davhlau ya nyob twg resistor module lossis hloov ua rau hauv qee qhov PROFIBUS li.
nyob rau hauv tag nrho
Raws li PROFIBUS raws tu qauv, thaum siv M12 B-coded connectors, davhlau ya nyob twg resistors raug ntsia ntawm ob lub cev kawg ntawm lub network. Lawv lub luag haujlwm tseem ceeb yog kom phim lub tsheb npav impedance, tiv thaiv kev cuam tshuam ntawm lub teeb liab, thiab xyuas kom muaj kev ruaj ntseg thiab kev ntseeg siab ntawm kev sib txuas lus. Cov terminal resistors feem ntau yog teeb tsa nrog ob 220 ohm resistors thiab ib qho 390 ohm resistor.
