I. Kev Taw Qhia
Nrog rau kev nce qib sai ntawm kev lag luam automation thev naus laus zis, programmable logic controllers (PLCs) tau dhau los ua cov cuab yeej tswj hwm tau dav siv thoob plaws ntau qhov chaw tsim khoom. Muab kev ntseeg siab, yoog raws, thiab yooj yim ntawm kev ua haujlwm, PLCs yog qhov tseem ceeb hauv kev lag luam automation. Cov ntaub ntawv no muab cov ncauj lus kom ntxaws txog PLC tswj kev siv cov txheej txheem thiab cov ntsiab lus tseem ceeb los pab cov neeg nyeem hauv kev paub thiab siv PLC thev naus laus zis kom zoo.
II. Basic Cheebtsam ntawm PLC Controllers
PLC maub los feem ntau suav nrog lub hauv paus ua haujlwm (CPU), lub cim xeeb, kev tawm tswv yim / tso tawm, lub zog siv hluav taws xob, thiab kev sib txuas lus sib txuas. CPU ua haujlwm tseem ceeb ntawm PLC, lub luag haujlwm rau kev ua haujlwm rau cov neeg siv kev pabcuam, khaws cov ntaub ntawv, thiab sib txuas lus nrog cov khoom siv sab nraud. Memory khaws cov neeg siv cov kev pab cuam, cov ntaub ntawv, thiab cov kev pab cuam system. Cov tswv yim / tso zis modules txuas cov khoom siv sab nraud rau PLC, ua kom cov ntaub ntawv tawm tswv yim thiab tso tawm. Lub hwj chim mov module muab lub zog ruaj khov rau PLC; Kev sib txuas lus interfaces pab PLC sib txuas lus nrog lwm cov khoom siv lossis cov tshuab.
III. PLC tswj kev siv txoj kev
Xaiv thiab Configuration
Thaum xaiv PLC, txiav txim siab nws cov qauv, I / O point suav, kev sib txuas lus sib txuas lus, thiab lwm yam tsis raws li qhov xav tau ntawm daim ntawv thov. Tsis tas li ntawd, xav txog yam xws li kev ntseeg siab, kev ruaj ntseg, thiab kev nthuav dav. Thaum lub sij hawm configuration, teem input/output chaw nyob, kev sib txuas lus tsis, thiab lwm yam kev teeb tsa raws li tej yam kev mob los xyuas kom meej PLC zoo.
Programming thiab Debugging
PLC programming feem ntau siv cov lus xws li daim duab ntaiv, cov npe qhia, lossis cov duab thaiv ua haujlwm. Thaum lub sijhawm ua haujlwm, tswj cov kev pabcuam- suav nrog cov haujlwm tseem ceeb, cov txheej txheem subroutines, thiab cov txheej txheem cuam tshuam- yuav tsum tau sau raws li cov cai tshwj xeeb. Kev saib xyuas yuav tsum tau them rau qhov tseeb qhov tseeb, kev ua cov ntaub ntawv raug, thiab kev sib txuas lus kev ntseeg tau. Tom qab programming, debugging yog qhov tseem ceeb los xyuas kom meej tias qhov program ua tiav kom raug thiab ua tau raws li qhov xav tau ntawm kev ua haujlwm.
Kev teeb tsa thiab kev teeb tsa
Thaum txhim kho PLC, xaiv qhov tsim nyog mounting qhov chaw kom ruaj khov thiab yooj yim ntawm kev txij nkawm. Ua tib zoo saib xyuas cov cua kub dissipation, tiv thaiv plua plav, thiab kev tiv thaiv dej. Thaum xaim, txuas cov khoom siv thiab cov khoom tawm raws li PLC qhov chaw nyob ua haujlwm kom ntseeg tau tias muaj kev sib txuas kom raug. Tsis tas li ntawd, xyuas kom cov xaim muaj kev ruaj ntseg, zoo insulated, thiab grounded.
Kev ua haujlwm thiab kev tu
Thaum lub sijhawm ua haujlwm PLC, tsis tu ncua tshuaj xyuas nws cov haujlwm ua haujlwm, suav nrog cov tswv yim / tso zis, kev sib txuas lus, thiab cov khoom siv hluav taws xob. Ua haujlwm tu vaj tse tsim nyog xws li kev tu, kev sib txuas kom nruj, thiab hloov cov khoom siv. Ua ntej kev nyab xeeb thaum kho kom tsis txhob muaj xwm txheej xws li hluav taws xob poob lossis hluav taws xob luv luv.
IV. Kev txiav txim siab rau PLC Controllers
Kev xaiv thiab kev txiav txim siab
(1) Thaum xaiv tus qauv, ua tib zoo xav txog qhov yuav tsum tau ua kom tsis txhob pov tseg lossis tsis txaus los ntawm oversizing lossis undersizing.
(2) Thaum lub sij hawm configuration, ua tib zoo xyuas cov chaw xws li input/output chaw nyob thiab kev sib txuas lus parameters kom paub tseeb tseeb.
(3) Thaum teeb tsa lub hwj chim, xyuas kom meej tias nws qhov hluav taws xob, qhov tam sim no, thiab lwm yam tsis ua raws li PLC cov lus qhia.
Programming thiab Debugging Considerations
(1) Thaum lub programming, xyuas kom muaj qhov tseeb ntawm qhov kev zov me nyuam, qhov tseeb ntawm kev ua cov ntaub ntawv, thiab kev ntseeg siab ntawm kev sib txuas lus interfaces.
(2) Thaum lub sij hawm debugging, ua tib zoo tshuaj xyuas qhov kev ua tiav, suav nrog cov tswv yim / tso zis thiab kev sib txuas lus.
(3) Thoob plaws hauv kev debugging, ua qhov tseem ceeb ntawm kev nyab xeeb los tiv thaiv kev sib tsoo xws li hluav taws xob poob lossis hluav taws xob luv luv.
Kev txiav txim siab ntawm kev teeb tsa thiab kev teeb tsa
(1) Xaiv qhov chaw teeb tsa tsim nyog los xyuas kom meej PLC ua haujlwm ruaj khov thiab pab txhawb kev txij nkawm.
(2) Hlau raws li PLC qhov chaw tawm tswv yim / tso tawm kom lav qhov raug xaim.
(3) Thaum lub sij hawm xaim, xyuas kom cov kev sib txuas muaj kev ruaj ntseg, zoo insulated, thiab hauv av.
Kev txiav txim siab txog kev ua haujlwm thiab kev saib xyuas
(1) Thaum lub sijhawm ua haujlwm, tsis tu ncua xyuas PLC txoj haujlwm ua haujlwm, suav nrog cov tswv yim / tso tawm, kev sib txuas lus, thiab cov khoom siv hluav taws xob.
(2) Thaum lub sij hawm tu, saib xyuas qhov tseem ceeb ntawm kev nyab xeeb kom tsis txhob muaj xwm txheej xws li hluav taws xob poob lossis hluav taws xob luv luv.
(3) Thaum hloov cov khoom siv, xaiv cov khoom ua raws thiab ua raws li cov txheej txheem hloov kom raug.
V. Xaus
Raws li cov cuab yeej tswj hwm tseem ceeb hauv kev lag luam automation, txoj kev siv kom zoo thiab kev ceev faj rau PLC tswj yog qhov tseem ceeb rau kev ua haujlwm ruaj khov thiab ua haujlwm ntev. Los ntawm tsab xov xwm no, tam sim no cov neeg nyeem yuav tsum muaj kev nkag siab tob dua ntawm PLC tswj kev ua haujlwm thiab cov ntsiab lus tseem ceeb. Hauv kev siv cov tswv yim, hloov tau yooj yim thiab hloov kho raws li cov xwm txheej tshwj xeeb yog tsim nyog kom ua tau raws li qhov xav tau tiag tiag.