Zihlelwa njani ii-PLCs? Zeziphi iiMetrikhi zokuSebenza eziPhambili?
Zihlelwa njani ii-PLCs? Zeziphi iiMetrikhi zokuSebenza eziPhambili?
Ii-PLC zinokuhlelwa ngolu hlobo lulandelayo:
Ngokubunjwa koLwakhiwo:
I-Integral PLC (okanye i-Unitary PLC): Onke amacandelo, kubandakanywa unikezelo lwamandla, i-CPU, kunye ne-interfaces ye-I / O, zidibaniswe kwindlu enye.
I-PLC yeModyuli (okanye i-PLC eDityanisiweyo): Amacandelo afana nemodyuli yonikezelo lwamandla, imodyuli ye-CPU, kunye nemodyuli ye-I / O yakhiwe ngokuzimeleyo. Ezi zinokudityaniswa kwi-rack esisigxina okanye umzila ngokusekelwe kwiimfuno ezithile zesicelo ukwenza inkqubo ye-PLC epheleleyo.
NgoMmandla we-I/O:
Compact PLCs: Ngokuqhelekileyo zineengongoma ezingaphantsi kwe-256 ze-I/O, ezifana ne-Siemens S7-200SMART PLC.
Ii-PLC eziPhakathi: Sebenzisa izakhiwo zeemodyuli kwaye ngokubanzi unamanqaku e-I / O ukusuka kwi-256 ukuya kwi-1024, njenge-Siemens S7-300 PLC.
Ii-PLC ezinkulu: Ngokuqhelekileyo zineengongoma ezingaphezu kwe-1024 ze-I/O, ezifana ne-Siemens S7-400 PLC.
IiMetrics zokuSebenza eziphambili zee-PLCs:
Ngelixa ii-PLC ezivela kubavelisi abahlukeneyo zinokwahluka kwiimpawu, zabelana ngeemetrikhi ezininzi eziqhelekileyo zokusebenza:
Igalelo/Imveliso (I/O) Amanqaku: Amanqaku e-I/O amele inani leempembelelo zangaphandle kunye neemveliso eziqhagamshelwe kwiphaneli yePLC. Okukhona amanqaku e-I/O ekhona, kokukhona amandla okulawula angakumbi iPLC enawo. Le yenye yezona zinto zibalulekileyo xa ukhetha i-PLC.
Isantya sokuSkena: Le metric ibonisa ukuba i-PLC yenza ngokukhawuleza kangakanani inkqubo yayo. Ngokuqhelekileyo kulinganiswa ngeemilliseconds ezifunekayo ukwenza imiyalelo ye-1K.
Umthamo wokuGcina: Umthamo wogcino udla ngokuchazwa ngokweekhilobhayithi (KW), iikhilobhayithi (KB), okanye iikhilobhithi (Kbit), apho i-1K = 1024. Ezinye ii-PLC zibonelela ngogcino olunokwandiswa.
Iseti yomyalelo: Iseti yomyalelo ibonisa amandla asebenzayo esoftware yePLC. Iseti yemiyalelo etyebileyo ithetha ukuba namandla okucwangcisa okuqinileyo.
Iirejista zangaphakathi (iiRelays): Ii-PLC ziqulethe iirejista ezininzi zokugcina izinto eziguquguqukayo, iziphumo eziphakathi, kunye nedatha. Ulungelelwaniso lwezi rejista lukwasisalathisi sokusebenza kwePLC.
Ukwandiswa kweSakhono: Oku kubonisa indlela i-PLC ekwazi ngayo ukudibanisa iimodyuli ezongezelelweyo zemisebenzi ekhethekileyo, njenge-A / D, i-D / A, ukubala ngesantya esiphezulu, okanye iimodyuli zonxibelelwano ezikude.
Uthelekiso phakathi kwe-PLCs kunye neNkqubo yoLawulo loNxibelelwano:
Phambi kokufika kwee-PLCs, iisekethe ezinentambo zombane zaziyeyona ndlela iphambili yolawulo olunengqiqo kunye nolandelelwano. Zazilula kwaye zingabizi kakhulu kodwa zingenako ukubhetyebhetye. Ukusukela oko kwathi kwasungulwa ii-PLCs, phantse yonke inkalo yokusebenza kwazo iye yodlula leyo yeenkqubo zolawulo lodluliselo.
Iindlela zoPhuhliso lwee-PLCs:
Ukuya kwintsebenzo ephezulu, ukusetyenzwa ngokukhawuleza, kunye nomthamo omkhulu.
Ukuphucula izakhono zothungelwano kunye nonxibelelwano.
Iya incinci, ingabizi kakhulu, kwaye kulula ukuyisebenzisa.
Ukuphucula ngokuqhubekayo ukusebenza kwesoftware.
Ukuphuhlisa iimodyuli ezintsha ezilungiselelwe usetyenziso lwePLC.
Ukuqhubela phambili i-miniaturization kunye ne-software-based evolution ye-PLCs.