PTZ Nemeni ewe Dive mi Alollol: Ekkewe Popun Bus RS485, Ekkewe Pworaus, me Ekkewe Osukosuk mi Fansoun

Porousan

Akos, 2023

RS485 ew napanapen porous mei sokono mei aea ruu linein signal (a kan iteni A me B, ika + me -) ne tinano porous. Ewe popun feiochun signaling mi sokkono ina pochokunen tufichin ungeni osukosuk.

RS485 Layer mi fis: Esap chok ruu wiis

RS485 ew napanapen porous mei sokono mei aea ruu linein signal (a kan iteni A me B, ika + me -) ne tinano porous. Ewe popun feiochun signaling mi sokkono ina pochokunen tufichin ungeni osukosuk — ewe chon angei a kuna ewe sokofesenin pochokun nefinen ekkewe ruu line nap seni ewe unusen pochokun mi riri ngeni fonu. Wewen pwe ewe noise mi kan fis (usun chok ewe osukosuk mi fis ren ekkewe mota mi kan ngeni ika ekkewe drive mi siwin) a chok kansel.

Nge ewe feioch seni ewe signal mi sokkofesen a feito ren eu liwin. Ewe bus RS485 a mochen pwe epwe pwung ekkewe pisekin eppet (tipeew ngeni 120 ohms) mi nom non ekkewe ruu kinikinin ewe bus pwe epwe awesi ekkewe signal mi pwarata. Ika ewe minen eppet ngeni awesi ese nomw ika a nomw non ewe neni ese pung, ekkewe esisin ra efisata tipisin data — a pwano usun esisin a kon watte me a ring won ew oscilloscope. Non angangen engineering, ew minen eppet ngeni nesoponon mi mwaken ina ew me nein ekkewe popun a fis pwe ese tongeni nemeni ewe PTZ.

Pelko-D me Pelko-P: Ewe kefil mi fis fan iten ewe prokram ese fis fan iten aramas meinisin

Ekkewe prokram mei kan fis ren tumunun PTZ non ewe angangen tumunun pisek, ina ewe Pelco-D me Pelco-P. Iir me ruu ir ekkewe prokram mi fis fan iten porausfengen, nge mi sokkofesen napanapen ekkewe poraus: Pelco-D a aea eu kokkot mi 7-byte, nge Pelco-P a aea eu kokkot mi kon kukkun. Ekkewe ruu prokram rese tipeew — ika pwe ewe kamera a anisi Pelco-D me ewe pisekin angang a tinato ekkewe annukun Pelco-P, ewe PTZ esapw ponuweni.

Pwal och, ewe mettoch mi kon osukosuk, ina pwe ekkewe sokkopaten brand ra fori ewe chok protocol epwe tongeni wor sokkofesenin mi monomon. Awewe chok, non ekkoch brands’ Pelco-D angangen, ewe PTZ mi fitikoko a sokkono seni ewe napanap, a emweni ngeni an epwe kisino ewe pwungun nemenem. Non ekkewe prokram mei wor sokopaten sokkun, mei murino sipwe anneani ewe prokram mei tipeew ngeni ew me ew sokkun, nap seni ach sipwe ekieki pwe ‘ika ir meinisin ra anisi Pelco-D, iwe mei tipeew.’ FangService ewe PK69 me PK68 ra anisi ekkewe prokram Pelco-D me Pelco-P, me ra tongeni pwisin siwin ika ren poun aramas anongonong won ewe napanapen kamera.

Komon Feil me Osukosuk Flow.

PTZ nemeni osukosuken atai annuk a namwot epwe wor ew kokkotun fitikoko. Ewe kokkotun atawei osukosuk mei mumuta ina: 1 cheki ewe layer non pekin inis (ika pwe ewe kabel RS485 mei pwung, ika pwe ewe wiring A/B mei pung, ika pwe ewe resistor mei fis); cheki ewe prokram (ika pwe ewe sokkun prokram a fiti, ika pwe ewe baud rate a fitikoko, ika pwe ewe koten address a pwung); cheki ewe layer ren pisekin angang (ika pwe ewe PTZ pwisin mei ngaw, ika pwe ewe pochokunen pochokun mei naf, ika pwe ewe kinikinin mecha mei jam). Ekkewe feiengawen layer non pekin inis ir ekkewe ra kon chommong — ewe siwinin line A/B ina ewe osukosuk mi kon monomon pun non chommong fansoun ewe PTZ a chuen rokopwanieno, non chok ewe epek. Non fansoun awenewen, ika ka kuna pwe ewe PTZ a ‘siwin ngeni pechen’ nupwen epwe ‘siwin ngeni pechen,’ kopwe akkomw cheki ewe wiring A/B. Pwal eu osukosuk mi kan fis, ina ewe RS485 line a chommongolo ren ekkewe pekin wire rese angang lon ewe kabel mi fiti ewe netip — ika ekkewe pekin wire mi aea fan iten RS485 lon ewe kebol ra wor ar kewe twist rate rese tipeeufengen ren ekkewe pekin data, epwe tongeni fis osukosuken signal. FangService’s PK69 series a wor ew angangen tes ren kabel RS485 mei tongeni kuna ika mei sopweno ne fis, ika mei mwochomwoch, me ika mei wor fitikoko. Ika epwe fiti ewe angangen anapanapen prokram, epwe tongeni mwitir kuna ewe layer mi feiengau.

RS485 Netipengaw me ekkewe kinikinin towaw

RS485 bus topology me ekkewe ukukun towaw ir ekkewe osukosuk mi mecheresin pout seni non ewe kokkotun engineer. Ewe RS485 a pesei ew topology usun bus — meinisin ekkewe pisek ra parallel won ew chok line mi watte, ren ew minen eppet ngeni soposopono non ew me ew kinikinin ewe line mi watte. Ew topology ren ekkewe fuu (meinisin ekkewe pisek ra pwisin riri ngeni ew neni mi nom nefinen) a efisata an epwe wor signal epwe pwarata, minne epwe tongeni efisata an epwe fis fitikoko ina mwo ika non ekkewe neni mi fokkun mwochomwoch.

Ewe RS485 mi nap seni meinisin a fiti ewe baud rate. Non ew baud mi kukkun 9600bps, ewe watten towaw epwe tongeni tori 1200 mita; non ew watten baud 115200bps, ewe watten towaw ese kan nap seni 200 mita. Ika ekkewe pisekin PTZ non ew prokram ra kinikinfesen non neni mi towaw, ekieki om kopwe apachanong ekkewe chon niwinsefan ika aukuuku ewe ukukun baud. FangService’s PK69 me PK68, non ewe napanapen tes RS485, ra tongeni pwarata ekkewe pisekin porous ikenai (ukukun baud, kinikinin data, kinikinin stop, parity), a anisi ekkewe chon angang ar repwe mwitir annetata pwe ewe kokkot a pung.

Seni RS485 ngeni IP PTZ Nemeni: Ewe Ekkesiwinin Teknolojiin Komunikasi.

Ewe kokkotun nemenem won PTZ a fis ren ewe RS485 serial bus, nge nupwen ekkewe kamera IP ra kon chommong, ewe kokkotun nemenem won PTZ a siwin ngeni ekkewe napanap mi anongonong won IP. IP PTZ ikenai a tongeni angei ekkewe annukun nemenem mi weneiti ewe kabel ren ewe netip ren ewe prokram ONVIF ika ekkewe prokram seni chon kamo, a awesi ewe osupwangen kabel RS485 mi pwisin nemeni.

Nge RS485 esapw pwan morono non fansoun mwochomwoch. Non ekkewe nenien angang mi fitikoko (AHD/TVI/CVI), ewe nemenem won PTZ a chuen anongonong won RS485; non chommongun ekkewe systemin uruwo mi fen foruta, RS485 ina chok ewe napanapen nemenem. Ina minne, pwal mwo nge lon ewe fansoun IP, ewe nemenem won RS485 PTZ a chuen eu tufich mi lamot ngeni ekkewe chon angangen tumun. FangService ewe linein pisekin angangen sotuni netip a kapachelong ekkewe sotuni nemenien RS485 PTZ (PK68/PK69) me ewe sotuni netip IP (PK69), a awora unusen sossotun sossot ren ekkewe sossotun netip me nomw me ikenai. Ren ekkewe angang mi sokono mi pachenong ekkewe minefon me ekkewe system mi nom, ei tufichin fiti ruu-coverage a fokkun auchea. View the Network Test Instruments Collection