Manual

EMO‐3000
OperationandProgrammingManual
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ma‐Scaler Themilliampscalerscalesthe0‐20mAmpinpu tsignalonPin5and6totheflowratein
engineeringunits/mA.
Forexample:20mA=1000cc/min.Then,
1000 =mA‐Scaler
B
whereB=20mA‐mAoffsetvalue.
WithamAOffsetValueof4mA,then
mA‐Scaler=62.5cc/minor1mA=62.5cc/min.
ThissignalservesasaflowratesetpointinthePIDmodeafterscaling.
mA’soffset Used in a situation where there is not an exact 4 mA’s at the low point of the analog
input.Theoffsetisthe
baselineforcalculatingtheset‐valuebased ontheanaloginpu t.
ImportantHardwareConnectionsforPIDOperation
Noneofthefollowingexternalsignalshastobewired.However,theyareusefulfeaturesinPIDmode.
SeeAppendixPfordetails.
Transparent Thetransparentinputredirectstheanaloginput,(PINS5/6)directly tothemAmps
output(PIN7).Itisnecessarytousethetransparentinputifthechannel
isputinopenloopsimulation.
ThissignalislocatedatPIN11onthebackplane.
HoldAnalog Thisinputsignalholdstheanalogoutputatthelastsetoutput.Theholdinputisoften
usedinflushsituationswherethecontro ller is supposedtobedisabled.Thissignalis
atPIN12.
Holdtotal Holdtotalinputdisablesthetotalizer.Oftenusedduringflush orsoft‐airpushcycles.
ThissignalisatPIN13onthebackplane.
Set‐value YoumustprogramthisnumberinordertogenerateaflowrateinPIDiftheexternal0‐
20mAmp
setvalueisnothookedup.Thisisthedigitalset‐value.Itisimportanttoknowthattheanalog
inputset‐valueisoverridden.
Setreached Anoutputthatactivateswhentheflowratemeetstheset‐value(+/‐tolerance).This
signalisatPIN14.
FluidTables: The
EMO‐3000supports32fluidtables.Eachtableisexternallyaccessedviapin#8or
viatheDM‐3000.Thedefaultfluidnumberis00.Mostvariablesaffectall32fluidnu mbers,butafew
requirethatyouenterthefluidnumberwhentheychange.Inthisevent,anadditionalscreen
appears
withprompts.Youcanassigneachfluidtabletostore flowdatafor adifferentfluidorcolorasitisbeing
regulated.Thesedatatablesarecontinuallyadaptedaseachcolorisencounter ed.Eachfluidis
identifiedbyavoltageof0.15625volts,whichrepresents 5 Vdivided
by32.Forexample,thefirst
color/fluidisindicatedbythestepvoltage0‐0.15625V.Seethefluidtableillustr ationonpage22.