Ku rakibidda go'doomiyeyaasha calaamadaha khaanadaha xakamaynta PLC

Dhinaca otomaatiga warshadaha, armaajooyinka xakamaynta PLC (Programmable Logic Controller) waxay ciyaaraan door muhiim ah, iyagoo mas'uul ka ah helitaanka calaamadaha dareemayaasha iyo hawl-wadeennada kala duwan, iyo gaaritaanka xakamaynta saxda ah ee habka wax soo saarka iyada oo loo marayo hawlgallada macquulka gudaha. Si kastaba ha ahaatee, codsiyada wax ku oolka ah, armaajooyinka xakamaynta PLC waxay inta badan la kulmaan jawiyo kala duwan oo elektromagnetic ah iyo dhibaatooyin faragelin calaamadeed, kuwaas oo horseedi kara cillado nidaamka xakamaynta, guuldarooyin soo noqnoqda, iyo xitaa khatar ku ah badbaadada qalabka iyo shaqaalaha. Sidaa darteed, ku darista calaamad go'doonsanQalabka xakamaynta ee PLC ayaa noqday xal caadi ah.

Hawlaha ugu muhiimsan ee go'doomiyayaasha calaamadaha waxaa ka mid ah ka hortagga gudbinta faragelinta elektromagnetic-ka, yaraynta dhacdooyinka cilladaha nidaamka, iyo bixinta go'doomin haddii ay dhacdo cilladaha qalabka goobta, ka hortagga faafitaanka cilladaha nidaamka xakamaynta oo dhan. Iyadoo la beddelayo oo la beddelayo calaamadaha ay heshay PLC iyada oo loo marayo aaladaha semiconductor-ka, ka dibna la go'doomiyo oo loo beddelayo iyadoo la adeegsanayo aaladaha dareemayaasha indhaha ama birlabta, ugu dambayntiina la dhimo oo dib loogu beddelo calaamaddii asalka ahayd ama calaamadaha kala duwan, habkani wuxuu hubinayaa xasilloonida iyo saxnaanta calaamadda, iyadoo sidoo kale laga hortagayo waxyeellada PLC iyo in la yareeyo saameynta calaamadaha goobta ku yaal ee PLC, gaar ahaan calaamadaha ciriiriga ah. Intaa waxaa dheer, go'doomiyayaasha calaamadaha waxay sidoo kale gaari karaan beddelka calaamadaha, sida beddelka calaamadaha ka imanaya isku xirka PT10 una beddelayo calaamadaha 4-20mA iyo gelinta nidaamyada PLC, si wax ku ool ah looga fogaado khilaafaadka u dhexeeya korontada iyo ilaha korontada iyo xallinta dhibaatada faragelinta labada dhinac ee u dhexeeya wareegyada iyo qalabka.

Codsiyada gaarka ah, sida khadka wax soo saarka ee warshadda birta ah, cabbirka iyo xakamaynta waxaa lagu gaaraa PLC, qalabka otomaatiga ah ee goobta, iyo hawl-wadeennada goobta. PLC waxaa la dhigaa khaanad kontarool oo ku taal dhowr boqol oo mitir u jirta goobta (oo ka shaqaynaysa heerkulka qolka), iyo qalabka otomaatiga ah ama qalabka kuleyliyaha ee ka imanaya calaamadaha soo saarista goobta iyada oo loo marayo fiilooyin una gudbaya khaanadda kontaroolada ee qolka kontaroolada. Waqtigan xaadirka ah, calaamadda soo galaysa PLC waa in la go'doomiyaa waxaana sidoo kale loo baahan karaa in la beddelo, sida in la go'doomiyo 4-20mA oo loo beddelo 0-5V ka hor inta aan la gelin PLC. Qalabka dhammaystiraya go'doominta iyo beddelka calaamadaha kuleyliyaha waxaa loo yaqaan "go'doominta calaamadaha thermocouple" ama "gudbiyaha heerkulka thermocouple". Shaqadeeda asaasiga ah waxaa ka mid ah in la go'doomiyo calaamadda soo gelinta iyo calaamadda soo saarista, iyo sidoo kale in la beddelo calaamadda heerka mV ee soo gelinta ee ka timaadda kuleyliyaha una beddelo calaamadaha warshadaha ee caadiga ah (4-20mA, 0-5V, 0-10V).

Marka la soo koobo, rakibidda go'doomiyeyaasha calaamadaha ayaa muhiimad weyn u leh hagaajinta isku halaynta nidaamyada otomaatiga warshadaha, yaraynta heerarka cilladaha, ilaalinta qalabka PLC, iyo hagaajinta tayada calaamadaha. Waa mid ka mid ah qaybaha muhiimka ah si loo hubiyo hawlgalka xasilloon oo la isku halleyn karo ee nidaamyada xakamaynta.