1. yooj yim zog ntawm cov davhlau ya nyob twg blocks
Lub davhlau ya nyob twg thaiv hauv PLC yog siv los txuas cov cables ntawm cov khoom siv nkag thiab tawm, thiab nws cov haujlwm yooj yim suav nrog:
Cable kev twb kev txuas: lub davhlau ya nyob twg thaiv muab qhov chaw sib txuas rau ntau yam sensors, actuators thiab lwm yam khoom siv sab nraud. Los ntawm cov kev sib txuas no, PLC tuaj yeem nyeem cov tswv yim tawm tswv yim thiab tswj ntau yam actuators los ntawm cov khoom tso tawm, kom paub txog kev tswj tsis siv neeg ntawm cov txheej txheem kev lag luam.
Cov teeb liab kis tau tus mob: lub davhlau ya nyob twg thaiv tsis yog tsuas yog qhov chaw txuas ntawm lub cable, tab sis kuj muaj lub luag haujlwm rau cov teeb liab kis. Lub input davhlau ya nyob twg tau txais cov teeb liab xa los ntawm cov khoom siv sab nraud, thiab lub davhlau ya nyob twg tso tawm cov teeb liab tsim los ntawm PLC rau lub actuator. Kev ruaj khov thiab txhim khu kev qha teeb liab kis tau tus mob yog ib qho tseem ceeb los xyuas kom meej qhov kev ua haujlwm ntawm automation system.
Kev tu thiab commissioning: lub hav zoov ntawm lub davhlau ya nyob twg thaiv ua rau cov neeg ua haujlwm saib xyuas yooj yim thiab ua haujlwm rau lub cev. Los ntawm kev sib txuas thiab txiav cov cables, cov neeg saib xyuas tuaj yeem nrhiav cov teeb meem sai sai thiab kho qhov tsim nyog. Qhov no pab txo qis downtime thiab txhim kho cov khoom tsim tau.
2. hom davhlau ya nyob twg thaiv
Nyob rau hauv PLC, muaj ntau yam xov hlau terminals, uas yuav muab faib ua input terminals thiab output terminals raws li lawv sib txawv zog thiab siv.
Input davhlau ya nyob twg: siv los txuas cov sensors thiab lwm yam khoom siv tshawb nrhiav, thiab xa cov ntaub ntawv xwm txheej ntawm ib puag ncig sab nraud rau PLC. Hom input davhlau ya nyob twg muaj xws li digital input terminal thiab analog input davhlau ya nyob twg. Digital input terminals tau txais cov teeb liab tsis sib xws, xws li lub xeev hloov pauv, thaum analog input terminals tau txais kev hloov pauv tsis tu ncua, xws li qhov kub thiab txias.
Output davhlau ya nyob twg: nws yog siv los txuas cov actuators thiab lwm yam khoom siv tswj, thiab xa cov teeb liab tsim los ntawm PLC rau cov khoom siv sab nraud, kom paub txog kev tswj cov txheej txheem kev lag luam. Zoo ib yam li cov tswv yim terminals, cov zis terminals kuj tseem tuaj yeem muab faib ua cov khoom tso tawm digital thiab cov khoom siv analog, uas yog siv los tswj cov teeb liab tawm tsis sib xws thiab tsis tu ncua raws li.
3. qhov tseem ceeb ntawm cov davhlau ya nyob twg
Qhov tseem ceeb ntawm cov davhlau ya nyob twg hauv PLC system tsis tuaj yeem tsis quav ntsej, lawv cuam tshuam ncaj qha rau kev ua haujlwm thiab kev ruaj ntseg ntawm automation system.
System stability: ruaj khov kev twb kev txuas yog qhov tseem ceeb ntawm qhov system stability. Cov kab hluav taws xob tsim tau zoo tuaj yeem tiv thaiv cable looseness, kev sib cuag tsis zoo thiab lwm yam teeb meem, txhawm rau txo qis kev ua haujlwm tsis zoo los ntawm teeb meem kev sib txuas.
Kev ntseeg tau ntawm qhov system: qhov zoo thiab kev ntseeg siab ntawm cov hlua hluav taws xob ncaj qha cuam tshuam rau kev ntseeg tau ntawm qhov system. Qhov zoo tshaj plaws lub davhlau ya nyob twg thaiv tuaj yeem tiv taus cov xwm txheej hnyav hauv kev lag luam ib puag ncig, xws li av noo, kub thiab kev co, kom ntseeg tau tias kev ua haujlwm ruaj khov ntawm lub sijhawm ntev.
Kev yooj yim ntawm kev saib xyuas thiab kev debugging: cov kab hluav taws xob tsim tau zoo ua rau cov neeg ua haujlwm saib xyuas kom sai thiab raug ua raws li kev saib xyuas thiab kev debugging. Qhov no yuav pab txo tus nqi txij nkawm ntawm qhov system thiab txhim kho kev txij nkawm zoo.
4. kev xaiv thiab kev teeb tsa ntawm cov hlua hluav taws xob
Thaum xaiv thiab txhim kho cov davhlau ya nyob twg, cov hauv qab no yuav tsum tau txiav txim siab:
Ib puag ncig yam tseem ceeb: xaiv cov khoom siv hluav taws xob tsim nyog raws li cov yam ntxwv ntawm kev ua haujlwm ib puag ncig kom ntseeg tau tias lawv tuaj yeem ua haujlwm ib txwm nyob hauv ib puag ncig hnyav.
Cable hom: txawv cables xav tau ntau yam ntawm cov davhlau ya nyob twg thaiv, yog li hom thiab specification ntawm cables yuav tsum tau txiav txim siab thaum xaiv.
Kev nyab xeeb: xaiv cov hlua txuas nrog kev nyab xeeb zoo kom ntseeg tau tias lawv tuaj yeem tiv thaiv hluav taws xob tsis ua haujlwm thiab lwm yam kev phom sij.
Kev ruaj ntseg: xav txog seb qhov kev tsim cov kab hluav taws xob puas yooj yim rau kev saib xyuas, thiaj li txo qhov nyuaj thiab tus nqi ntawm kev saib xyuas.
