Sensors muaj ntau hom kev tso zis, suav nrog cov khoom siv analog xws li voltage thiab tam sim no, nrog rau cov txiaj ntsig digital xws li I²C, SPI, RS485, thiab RS232. Ntawm cov no, RS485 yog qhov siv dav tshaj plaws thiab txhim khu kev qha digital kev sib txuas lus rau kev ntsuas siab. Kab lus no yuav tsom mus rau kev qhia txog txoj kev sib txuas lus no rau lub siab sensors thiab cov ntsiab lus tseem ceeb rau nws siv.
Yooj yim muab, RS485 kev sib txuas lus zoo li "kev sib tham" nruab nrab ntawm cov khoom siv- nws ua rau cov cuab yeej siv khoom lag luam (xws li lub tshuab xa hluav taws xob siab) thiab khoos phis tawj / PLC sib txuas lus nyob rau qhov ntev uas siv ob lub xov hlau (A thiab B kab).
Hom kev sib txuas lus no tiv taus kev cuam tshuam, tuaj yeem xa tawm ntau pua metres, thiab qhov tseem ceeb tshaj plaws, txhua yam khoom siv yuav tsum sib faib tib yam baud tus nqi thiab raws tu qauv.Key Considerations Thaum Siv RS485:
1. Cov kab A thiab B yuav tsum tsis txhob thim rov qab.
2. Tus nqi baud yuav tsum zoo ib yam thoob plaws txhua yam khoom siv (feem ntau yog 9600).
3. Cov txheej txheem kev sib txuas lus yuav tsum sib phim. Yog tias kev sib txuas lus tsis ruaj khov, 120 Ω terminating resistor tuaj yeem muab ntxiv rau qhov kawg ntawm kab.
Hauv RS485 kev sib txuas lus, Modbus raws tu qauv yog tus qauv kev sib txuas lus ntau tshaj plaws - nws ua haujlwm raws li kev cai thoob ntiaj teb rau kev sib txuas lus, kev siv twj paj nruag, PLCs, thiab khoos phis tawj los ntawm ntau hom kev sib pauv cov ntaub ntawv. Cov txheej txheem qhib no siv tus tswv-cov lus nug qhev- teb txoj kev sib txuas lus, nyeem thiab sau cov ntaub ntawv los ntawm cov chaw nyob sau npe ua ntej. Cov lus txib sib txuas lus tau tsim raws li hauv qab no:
|
Chaw nyob |
Function Code |
Sau npe pib |
Sau npe ntev |
CRC Tshawb xyuas |
|||
|
01 |
03 |
00 |
02 |
00 |
02 |
65 |
CB |
Hauv kev siv cov tswv yim, cov khoom siv feem ntau muab kev mob siab rau Modbus debugging software, tso cai rau cov neeg siv ceev nrooj teeb tsa thiab ntsuas kev sib txuas lus. Yog tias tsis muaj lub cuab yeej tshwj xeeb, cov neeg siv tuaj yeem ua qhov kev debugging yooj yim siv - lub hom phiaj sib txuas lus software. Cov software zoo li no txhawb xa kev cai Modbus cov lus txib-tsuas yog teeb tsa cov cim tsis raug (baud tus nqi, cov ntaub ntawv khoom, nres cov khoom, thiab lwm yam) thiab Modbus raws tu qauv hom (RTU/ASCII) los cuam tshuam nrog lub cuab yeej. Los ntawm kev nkag mus rau tus qhev chaw nyob, kev ua haujlwm code, thiab sau npe chaw nyob, cov neeg siv tuaj yeem nyeem lossis sau cov ntaub ntawv ntaus ntawv, ua kom muaj kev sib txuas lus yooj yim thiab daws teeb meem. Qhov kev hloov pauv no ua kom ntseeg tau tias cov neeg siv tuaj yeem ua tiav Modbus kev sib txuas lus debugging txawm tias tsis muaj software tshwj xeeb.
Xi'an Mihui Technology tshwj xeeb hauv kev tsim khoom siab -precision digital siab transmitters raws li kev sib txuas lus RS485, xws li High Precision Pressure Transmitter series:https://www.mihuitec.com/pressure-transmitter/high-presicion-siab-transmitter.html
Cov parameter tshwj xeeb yog raws li nram no:
Yog xav paub ntxiv txog peb cov kev daws teeb meem siab, thov mus saib peb lub vev xaib official:www.mihuitec.com.
Yog tias koj muaj lus nug txog koj daim ntawv thov tshwj xeeb lossis xav tau kev txhawb nqa, thov hu rau peb pab pawg engineering ntawm email ntawm:mihuitec@gmail.com. Peb nyob ntawm no los muab cov kws tshaj lij kev taw qhia thiab cov kev daws teeb meem zoo tshaj plaws rau koj cov kev xav tau.
