letemperatureco
troli
buildi
gautomatio
Programmi
gismuchsimplerifthesefu
ctio
sarealreadybuilti
tosystemsoftwareofprocessorI
processautomatio
2digitaloutputupdow
closedloopPIDregulatio
isquiteofte
usedItmightbeasurprisebutit’s
oti
cludedi
mostofthemicroco
trollersSieme
sAG2003a
dforaverageprogrammerit’stoocomplicatedtasktocreatehisow
regulatorusi
gsta
dardfu
ctio
sBasicallythereare2solutio
seithertoavoidthisco
structio
ortouseapplicableco
troller
fTable1Tableformethodresults
Commu
icatio
isbecomi
gmoreimporta
ti
owadaysautomatio
systemsI
somecases
o
sta
dardiseddevicesasbarcodereadersorelectro
icweightshavetobei
cludedi
tothesystemThe
it’svitaltohavefu
ctio
sforprotocolprogrammi
gfreeportprogrammi
gSta
dardisedprotocolsdema
dexiste
ceofspecificmodules
Worki
gco
ditio
sca
usuallybeovercomebyusi
gspecialcabi
etsbuttherearealsospecificseriesofprogrammableco
trollersthathaveimprovedresista
ceforelectromag
eticdisturba
ceshumiditya
dvibratio
sI
verydustye
viro
me
tsallcooli
gve
tilatorshavetobeequippedwithfilters
5CONCLUSIONS
Mai
be
efitsofprogrammableco
trollersare
flexibility
commu
icatio
possibilities
realisatio
ofcomplexco
trolalgorithms
reliability
Alter
ativesolutio
sshouldbeco
sideredif
fsystemisverysimple
specialdevicesareavailable
datarecordi
gis
ecessary
I
itialselectio
ofappropriatesolutio
a
dhardwarehasgreati
flue
ceo
fi
alresultMistakesi
thisstepsig
ifica
tlyi
creaseoverallbudgetofprojectassomeprogramsmighthavetobecha
geda
dsomehardwarereplaced
Basedo
hispracticalexperie
cetheauthorhasformedamethodforselecti
gprogrammableco
trollerIthas9criteria’s
atureofsolutio
eworexisti
g
maximum
umberofelectricali
putsoutputsalloweddigitala
aloguei
putsoutputs
eedforspecialmoduleshighspeeddigitaloutputs
layoutofse
sorsa
dactuatorslocalorperiphery
propertiesofprocessorprograma
ddatamemory
programspecialitiesspecialfu
ctio
s
commu
icatio
eedsProfibusASCII
worki
gco
ditio
shumiditytemperaturevibratio
dust
Methodis
otguara
teedtoalwayspoi
toutthebestselectio
butusi
gitcertai
lyavoidsmistakes
6REFERENCES
HughesTAProgrammableCo
trollersThirdEditio
ISATheI
strume
tatio
Systemsa
dAutomatio
Society2000334p
JackHAutomati
gMa
ufacturi
gSystemswithPLCs828pAvailable
httpclaymoree
gi
eergvsuedujackhbooksplcspdfplcbook4_2pdfAccessed3102003LOGOMa
ualSieme
sAG2003312p
OPCFou
datio
homepagehttpwwwopcfou
datio
orgAccessed9112003
Rosi
AProgrammableCo
trollersSimaticS7Talli
TTU2000120pMasterThesisi
Esto
ia
BergerHAutomar