Siargo MF4600 Series User manual

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Gas Mass Flow Meter VB.4
Model MF4600
Sold in North America by:
Servoflo Corporation
75 Allen Street
Lexington, MA 02472
www.servoflo.com/info@servoflo.com
781-862-9572

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www.Siargo.com
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MF4600UserManual
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Gas Mass Flow Meter
withMEMScalorimetricsensingtechnology
MF4600Series
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User Manual
DocumentNo. 05‐2022‐CM1EN
Issuedate:  2022.5
Revision:  VB.4
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SiargoLtd.
3100DeLaCruzBoulevard,Suite210
SantaClara,CA95054
USA
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Tel:+1(408)969.0368
Email:[email protected]
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©Copyright2022bySiargoLtd.
SiargoLtd.anditssubsidiariesreservetherighttochangethespecificationsand/ordescriptions
withoutpriornotice.Forfurtherinformationandupdates,pleasevisit:www.Siargo.com
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www.Siargo.com
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MF4600UserManual
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
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Attention!
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Pleasecarefullyreadthismanualpriortooperatingthisproduct.
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Donotopenormodifyanyhardwarewhichmayleadtoirrecoverable
damage.
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Donotusethisproductifyoususpectanymalfunctionsordefection.
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Donotusethisproductforcorrosivemediaorinastrongvibration
environment.
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Usethisproductaccordingtothespecifiedparameters.
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Onlythetrainedorqualifiedpersonnelshallbeallowedtoperform
productservices.
Becautiousfortheelectricalsafety,evenitoperatesatalowvoltage,
anyelectricalshockmightleadtosomeunexpecteddamages.
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Thegastobemeasuredshouldbecleanandfreeofparticles.Donotapply
thismeterforliquidmedium.
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Donotapplyforanyunknownornon‐specifiedgasesthatmay
damagetheproduct.
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Forremotedata,pleasebesurethemeterisproperlyconfigured.

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www.Siargo.com
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MF4600UserManual
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
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TableofContents
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1.Overview..................................................................................................5
2.Receipt/unpackoftheproducts................................................................6
3.Knowingtheproducts...............................................................................7
3.1Productdescription...............................................................................................7
3.2Poweranddatacabledescription...........................................................................7
3.3Mechanicaldimensions..........................................................................................8
4.Installation...............................................................................................9
5.OperationandMENUdescription..............................................................11
5.1Checktheproductspecifications...........................................................................11
5.2Checktheleakage...............................................................................................11
5.3Powerthemeteranddigitaldataconnection.........................................................11
5.4MeterdisplayandMENUdescriptions...................................................................12
5.4.1Meterdisplayandfunctionkeys....................................................................................12
5.4.2MENUfunctioninputsequence.....................................................................................12
5.4.3Detaileddescriptionsofthefunctions............................................................................15
5.5RS485Modbuscommunicationprotocol...............................................................17
5.5.1Hardwareconnection....................................................................................................17
5.5.2Communicationparameters..........................................................................................18
5.5.3Frame..........................................................................................................................18
5.5.4Functioncodes.............................................................................................................19
5.5.5Registers......................................................................................................................19
5.6Analogoutput.....................................................................................................22
5.6.14~20mAoutput..........................................................................................................22
5.6.20.5~4.5Vdcoutput......................................................................................................23
5.7Pressureloss.......................................................................................................23
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www.Siargo.com
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MF4600UserManual
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6.Productselectionandorderinformation....................................................25
6.1Productselection................................................................................................25
6.2Ordercontactandcustomersupport.....................................................................26
7.Technicalspecifications............................................................................27
8.Technicalnotesfortheproductperformance............................................28
8.1Measurementprinciple........................................................................................28
8.2Precautionsforthebestperformanceoftheproduct..............................................28
8.2.1Comparisonwithathirdpartyreferencemeter...............................................................28
8.2.2Controlflowwithamanualvalve...................................................................................29
8.2.3Particlecontaminationandfluidiccleanness..................................................................29
8.2.4Applytoadifferentgasmedium....................................................................................29
9.Troubleshooting......................................................................................30
10.WarrantyandLiability..............................................................................31
11.Servicecontact........................................................................................33
AppendixI:Productevaluationkit..................................................................34
AppendixII:Documenthistory.......................................................................35
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www.Siargo.com
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MF4600UserManual
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
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1. Overview
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Allcontactinformationcanbefoundattheendofthismanual.
ThismanualprovidesessentialinformationfortheoperationoftheMF4600seriesofgasmassflow
meterswithamanualcontrolvalveforgeneral‐purposegasflowmonitorandcontrolapplications.
Theproductperformance,maintenance,andtrouble‐shootingaswellastheinformationforproduct
order,technicalsupport,andrepairarealsoincluded.
MF4600massflowmetersaredesignedforgeneralpurposepreciseindustrialgasprocessing
monitor,orcontrol.Itcanbeusedtoreplacethemechanicalrotameterswheredigitaldataand/or
remotecontrolarerequired.Themeterseriescoverawidedynamicflowrangewithaworking
pressureratingofupto1.0MPa,andatemperaturerangingfrom‐10to55°C.
ThemetersareoperatedwithSiargo’sproprietaryMEMScalorimetricmassflowsensorstogether
withthesmartcontrolelectronics.Thesensorsurfaceispassivatedwithsiliconnitrideceramic
materialstogetherwithawater/oilproofnano‐coatingforperformanceandreliability.Themeter
bodyismadeofeitheraluminumalloyorstainlesssteelthatisavailableforapplicationsofmostof
thegases.
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www.Siargo.com

MF4600UserManual
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
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2. Receipt/unpackoftheproducts
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Uponreceiptoftheproducts,pleasecheckthepackingboxbeforethedismantlementofthepacking
materials.Ensurenodamagesduringshipping.Ifanyabnormalityisobserved,pleasecontactand
notifythecarrierwhoshippedtheproductandinformthedistributorsorsalesrepresentativesifthe
orderisnotplaceddirectlywiththemanufacturer,otherwise,themanufacturershouldbeinformed
aswell.Foranyfurtheractions,pleaserefertothereturnandrepairsectioninthismanual.
Ifthepackingboxisintact,proceedtoopenthepackingbox,andyoushallfindtheproduct(either
themeterorthemeterwiththevalvepertheactualorder).Thepoweradapterand/ordatacableas
shownbelowmayalsobefoundaccordingtoyouractualorder.
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
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 



Figure2.1:MF4600flowmeter  Figure2.2:datacable

Pleasecheckimmediatelyfortheintegrityoftheproductaswellasthepoweranddatacable,ifany
abnormalisidentified,pleasenotifythedistributor/salesrepresentativeormanufacturerassoonas
youcan.Ifanydefectsareconfirmed,anexchangeshallbearrangedimmediatelyviatheoriginal
saleschannel.(Note:theLEDdisplayshallnotbelighteduntilthepowercableispluggedin).This
usermanualshallalsoeitherbeincludedinthepackingboxorviaanonlinerequestforanelectronic
version.Inmostcases,thismanualshallbemadeavailabletothecustomerbeforetheactualorder.
ThestandardcablehasanAMPMODUMTE(5positions)compatibleconnectorwithalengthof0.5
meters.




www.Siargo.com

MF4600UserManual


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3. Knowingtheproducts
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3.1 Productdescription
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Figure3.1:MF4600partsdescription
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3.2 Poweranddatacabledescription

  Table3.1:MF4600pin/wireassignments.

 



ThestandardcablehasanAMPMODUMTE(5positions)
compatibleconnectorwithalengthof0.5meters.
Figure3.2:MF4600connectionandcable


Wire Color Definition
1BlueRS485B
2GreenAnalogoutput4~20mA
/Analogoutput0.5~4.5Vdc
3RedPowersupply,8~24Vdc
4BlackGround
5YellowRS485A
Meterbody
LEDdisplay
MENUkeys
Manualcontrolvalve

Flowdirection
Electricalinterface,AMP
MTE,5positions
LEDindicator
Flowinlet
Flowoutlet


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www.Siargo.com

MF4600UserManual
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
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3.3 Mechanicaldimensions
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Figure3.3:MF4600dimensions

ModelDN(mm)N*L**H1H2
MF46011.0NPT1/8”~1/4”
BSPT1/8”~1/4”8813890
MF46022.0NPT1/8”~1/4”
BSPT1/8”~1/4”73~8013494
MF46033.0NPT1/8”~1/4”
BSPT1/8”~1/4”

73~8013494
MF46088.0NPT1/4”~3/8”
BSPT1/4”~3/8”73~8013890

Note: *Otherthreadscanbecustomized.Forbarbedconnection,pleaseuseaconverter.
**Therangeisfromvalveclosetovalvefullyopen.
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www.Siargo.com
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MF4600UserManual
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
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4. Installation

Donotopenoralteranypartoftheproductwhichwouldleadtomalfunctionandirrecoverable
damage.Itwillalsoforfeitthetermsofthewarrantyandcauseliability.
Theproductatthetimeofshipmentisfullyinspectedforitsqualityandmeetsallsafetyrequirements.
Additionalsafetymeasuresduringtheinstallationshouldbeapplied.Thisincludes,butisnotlimited
totheleakageverificationprocedures,standardEDS(electrostaticdischarge)precautions,DC
voltageprecautions.Othertaskssuchascalibration,partreplacement,repair,andmaintenance
mustonlybeperformedbytrainedpersonnel.Uponrequest,themanufacturerwillprovide
necessarytechnicalsupportand/ortrainingofthepersonnel.
Therearenopreferreddirectionsfortheinstallation.Flowdirectionshouldbealignedwiththearrow
markonthemeterbody.Iftheflowingfluidmayhaveparticlesordebris,afilterisstrongly
recommendedtobeinstalledupstreamofthemeter.
Pleasefollowthefollowingstepstocompletetheinstallation:
a)Uponopeningthepackage,theproduct'sphysicalintegrityshouldbeinspectedtoensureno
visualdamage.
b)Beforeinstallationoftheproduct,pleaseensurethatthepipedebrisorparticlesoranyother
foreignmaterialsarecompletedremoved.
c)Closethemetervalvecompletely.
d)Duringinstallation,pleasemakesurenoforeignmaterials(suchaswater,oil,dirt,particles,etc.)
enteringintotheinstallationpipeline.
e)ConnectelectricalwiresperthewiredefinitioninTable3.1.Pleasebesureofthepowersupply
range(i.e.,8~24VDC)andpowersupplypolarization.Ifanadapterotherthantheonesupplied
bythemanufacturer,makesuretheadaptermeetsindustrialstandardsandhasallsafety
certifications.
f)Forthedatacommunicationwireconnection,pleasefollowthedescriptioninTable3.1andmake
surethatthewiresarecorrectlyconnectedtotheproperportsonyourdatadevice/equipment.
Pleasemakesurethedatacablemeetsindustrialstandardswithpropershielding.
g)Oncetheexternalpowerissuccessfullyconnected,theLEDshouldbelightedupwiththeproper
informationdisplayedworkscorrectly.
h)Slowlyopenthevalve(s)ofthegassupplyifany,upstreamordownstream,orbothofthe
pipeline.Andthenslowlyopenthevalveofthemeter,themetershouldthenstarttomeasure
theflowinthepipeline.Note:becausethemeterhasalargedynamicalmeasurementrange,it
couldbenormalifyouseethesmallinstantflowrateevenifthereisnoflowinthepipeline.If



www.Siargo.com
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MF4600UserManual
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
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thevalueconsistentlypresent,double‐checkthepipeleakageandthenresettheoffsetifyou
aresurethereisnoleakageorflow.
h)Thiswillconcludetheinstallation.


Cautions
a)Don'talteranypartsoftheproduct.
b)Ensuretheelectricalconnectionisproperlydonepertheinstructions.
c)Makesurenomechanicalstressesintheconnections.
d)Thestrongelectromagneticinterferencesourcesclosebyoranymechanicalshocksatthe
pipelinemayalsocreatemalfunctioningoftheproduct.
e)Slowlyopen/closevalvestopreventabruptpulseflowimpact.


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MF4600UserManual
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
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5. OperationandMENUdescription
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5.1 Checktheproductspecifications

Beforestartingtousethisproduct,checktheproductspecificationsthatcanbefoundinthismanual
orthebasicinformationfromthedatasheetatthecompany’swebsitewww.Siargo.com.
ThedetailedproducttechnicalspecificationscanbefoundinSection7.Foraspecificapplication,
thepressureratingmustnotbehigherthanthesystempressuretobemeasured,andtheflowrange
shouldalsobewithinthespecifiedones.Inmostcases,theuseofahighfull‐scalerangedmeterfor
theverylowflowratemeasurementoftenresultsinerroneousdata.Thegastobemeasuredmust
alsobeconsistentwiththatspecifiedbytheproduct.Beparticularlycautiousaboutthesupplied
voltageindicatedinthespecification.Ahighervoltagemayleadtoirrecoverabledamage,anda
lowervoltagewillnotpowertheproductforanydesiredfunctions.
Forthebestperformanceoftheproduct,itisadvisedthatthegastobemeasuredmustbecleanand
freeofparticlesorotherforeignmaterials.

5.2 Checktheleakage

Checkgasleakagebeforeanymeasurement.Ifitisneeded,thepressurizednitrogenoraircanbe
usedfortheleakagecheck.

5.3 Powerthemeteranddigitaldataconnection

AlthoughthisproductcomplieswiththeCE‐requiredEMCregulations,italsorequirestheproductto
beusedaccordingtothestandardelectricaldevicepractice.Beforeconnectingthemeterwith
externalDCpoweroranAC‐DCadapter,makesurethesupplyvoltageiswithintherangeofthe
specifiedonesinSection7.BecautiousthatthestandardelectricaldeviceprecautionssuchasEDS
(electrostaticdischarge)andDCvoltageareobserved.Excessiveelectrostaticdischargemay
damagetheproduct.
Themanufacturer‐suppliedpoweranddatacablehavealockingfixture.Lockthecableandmake
sureitisproperlyengagingandwillnotbeaccidentallygotunplugged.
Half‐duplexRS485Modbusisusedfordigitaldatacommunication.Makesurethewiresareproperly
connectedtothereceiverside.

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
MF4600UserManual


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5.4 MeterdisplayandMENUdescriptions

5.4.1 Meterdisplayandfunctionkeys



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Figure5.1:MF4600displayandfunctionkeys
Themeterhasafront3‐keyboardfortheusertosetthedesiredfunctions,accessdata,andcheck
forthestatus.TheMenukey(M)isattheupperrightpositionthatallowstheusertoselectafunction
andconfirmationorotherrelatedactionsthatwillbedetaileddescribedintheMENUkeysequence
graphicpresentation.Twokeys(“Up”and“Down”)areusedtoselectthefunctions.ThetwoLED
lights(IandII)areusedfortheindicationofdisplaycontents.Forthedefaultinstantflowratedisplay,
bothofthesetwoLEDswillbeoff.Pleaserefertothedetailedinformationbelow.
ThedefaultinstantflowrateisSLPM(orsccm)with4digits,oneofthedigitsisadecimal.Whenthe
flowrateisabovethespecifiedflowrange,LEDIwillflashfortheflowratesabovetheupperlimit,
andLEDIIwillflashfortheflowratesbelowthelowerlimit.IfbothLEDsareflashing,thedisplayed
valuesareincorrect.
Oncethepowerissuppliedandnoabnormalissuesareobserved,themeterisreadytoperformthe
measurements.WhiletheLEDdisplaystheinstantmassflowrate,theaccumulatedortotalizedflow
ratecanbeaccessedbypressthe“Up”or“Down”key.
(a)WhentheinstantflowrateisSLPM,theaccumulatedflowrateisregisteredwith“standard
liter”(SL),andthemaximumcanbe9,999,999.9SL,or“normalcubicmeters”(Nm3),andthe
maximumcanbe999,999.99Nm3;
(b)Whentheinstantflowrateissccm,theaccumulatedflowrateisregisteredwith“standard
cubiccentimeter”(scc),andthemaximumcanbe9,999,999.9scc,or“standardliter”(SL),and
themaximumcanbe999,999.99SL.
Thefirstfourdigitsoftheaccumulatedflowrateareindicatedbythe“I”LEDlight,andthelastfour
digitsarerepresentedwhenthe“II”LEDlightison.The“I”and“II”LEDlightswillbeautomatically
switchedwhentheaccumulatedflowrateisdisplayed.Theaccumulatedflowratewillbe
automaticallysavedeverythreeminutes.Atthetimeofthepowerfailureorcut‐off,thevaluewill
berepresentingthelatestsavedones.
5.4.2 MENUfunctioninputsequence
Attheflowmeasurement(main)display,pressthethreeMEMUkeys,itwillallowtheusertoperform
avarietyofsettingsoftheproduct.Thefollowinggraphdetailsthekeysequenceforeachfunction,
andsomedetailedexplanationsarefollowedafterthegraphicpresentation.


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MF4600UserManual
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
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Figure5.2:MF4600menuflowchart

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MF4600UserManual
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
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Table5.1:On‐screencharactersandtheircorrespondingfunctions
On‐screencharacter SymbolFunctions
0.unL/LocUnlock/lockthekeyboard
1.oFF/onResettheaccumulatedflow
2.oFF/onResetorcalibratetheoffset
3.1~255
SettheModbusaddress
Available:1~255,
Thedefaultvalueis1.
4.1/2/5/10/
20/50/100
Settheresponsetime
Available:1/2/5/10/20/50/100,means
of10/20/50/100/200/500/1000msec.
5.25/50/100/
200
Setthedisplayrefreshrate
Available:25/50/100/200,
meansof250/500/1000/2000msec.
6.0~110
Settheupperflowratealarm
Available:0~110,meansof0%~110%full
scale.
Thedefaultvalueis100(100%fullscale).
7.0~110
Setthelowerflowratealarm
Available:0~110,meansof0%~110%full
scale.
Thedefaultvalueis0(0%fullscale).
8.0/1/2/3
Setthedisplaydecimal.
Available:0/1/2/3,dependsonthefull
scale.
9.48/96/192
/384
Setthecommunicationbaudrate
Available:48,96,192,384,meansofbaud
rate4800,9600,19200,38400bps.
Thedefaultvalueis384(baudrate38400).
A.10~999
SettheGCF(gasconversionfactor)
Available:10~999,meansofGCF=100~
9990.
Defaultvalueis100,meansofGCF=1000.
b.0/1
Settheaccumulatedflowrateunit.
 sccorSL(instantflowrateunitissccm);
 SLorNm
3
(instantflowrateunitis
SLPM).
Note:Duringthisprocess,themeterwillcontinuetomeasuretheflowwithoutbeinginterrupted.



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MF4600UserManual
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
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5.4.3 Detaileddescriptionsofthefunctions
0) Keyboardsecurity

Thisfunctionallowstheusertodisablethekeyboardentryafterthemeterissetasdesired.It
willpreventanyaccidentalkeyentrythatmayalterthesettings.AttheMENU,select“lock”
tolockthekeyboard.

1) Resettheaccumulatedflowrate

Themaximumaccumulatedflowratethatcanberegisteredbythemeteris99,999,999SL.
Oncethevalueisreached,theaccumulatingfunctionwillstopprocessingthedata.Itis
necessarytoresettheregisterforthecontinuationofthisfunction.

Usethisfunctionwithcautionasitwilldeleteallcurrentaccumulatedflowratedata.

2) Resetorcalibratetheoffset

Sometimesorafteralongtimeofuse(i.e.,over1yearofusage),thesensorsurfacecould
haveathindepositfromtheenvironmentifthegasisnotsuperclean.Dependingonthe
actualcase,thisdepositmightormightslightlychangethethermalsensitivityofthesensor
resultinginadriftoftheoffsetoratinyflowatthezeroflowinthepipeline.Usethisfunction
toresettheoffsetwillnothaveanimpactonthemeterperformanceifsuchanoffsetis
outsideofthe100:1calibratedrange.

Usethisfunctionwithcautionandmakesurethereisnoflowwhenexecutingthisfunction,
otherwise,itmayincursomeadditionalerrorstothemeasurement.

3) SettheModbusaddressofthemeter

UsethisfunctiontosettheRS485Modbusaddressofthemeter.Thissettingcanalsobe
doneviatheRS485communication.

4) Settheresponsetime

Usethisfunctiontochangetheresponsetimeofthemeter.Thedefaultoneis10msec.
Increasingtheresponsetimewillallowmoredatatoaverageandoutputastablerflowrateif
theactualflowratemayhavesomeundesiredfluctuation.

Availableresponsetimeis10msec(4.1);20msec(4.2);50msec(4.5);100msec(4.10);200
msec(4.20);500msec(4.50),and1000msec(4.100)

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MF4600UserManual
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5) Setthedisplayrefreshrate

Changethedisplayrefreshratewilljustalterthedisplayupdatetime,itwillhavenoimpact
onthemeter’smeasurement.Thedefaultrefreshrateis250msec.

Availablerefreshratesare250msec(5.25);500msec(5.50);1000msec(5.100),and2000
msec(5.200).

6) Settheupperflowratealarm

Thisfunctionallowstheusertosetamaximumallowableflowrateabovewhichanalarmwill
betriggeredwithaflashingscreen.

7) Setthelowerflowratealarm

Thisfunctionallowstheusertosetaminimumflowratebelowwhichanalarmwillbe
triggeredwithaflashingscreen.

8) Setthedisplaydecimal

Theusercanusethisfunctiontoalterthedefaultonedecimaldisplay.Optionsarelisted
belowforeachflowrange:
Table5.2:decimaloptions
FlowrangeDecimaloptions

Defaultdecimal
0~100,200,500sccm

0,1

0

0~1000,2000,5000sccm

0

0

0~1,2,5SLPM

0,1,2,

3

2

0

~

10,20,

50

SLPM

0,1,2

1


9) Setthecommunicationbaudrate

ThisfunctionallowsaMENUentryoftheRS485communicationbaudrate.

10) SettheGCF(thegasconversionfactor)
Themeterisnormallycalibratedwithairat20°Cand101.325kPa.Whentheuserwantsto
setthestandardconditionsotherthanthespecifiedtemperatureorappliesthemeterfor
otherallowablegases(pleasecontactthemanufacturerforthelistofgases),itispossibleto
usethisgasconversionfactorfunctiontoensurethereadingsarecorrectanddesired.

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MF4600UserManual
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ThedefaultvalueoftheGCFis1000(1.000).Forexample,ifonewantstoalterthestandard
temperatureto0°C,thefactorcanbecalculatedusingthegasequation:PV/T=constant:
GCF=1000xV(new)/V(20°C)=T(o°C)/T(20°C)=1000x273/293=932
Thenthegasconversionfactorwouldbe932.
Insomecases,theactualsystemmayhaveaconstantdeviationfromthatatthecalibration,
thisGCFcanalsobeusedtoadjust.Foradditionalinformation,pleasecontactthe
manufacturer.

11) Settheaccumulatedflowrateunit.
 WhentheinstantflowrateunitisSLPM,theaccumulatedflowrateunitcanbesettoSL
orNm3;
 Whentheinstantflowrateunitissccm,theaccumulatedflowrateunitcanbesettoscc
orSL.

5.5 RS485Modbuscommunicationprotocol
ThedigitalcommunicationprotocolisbasedonstandardModbusRTUHalf‐plexmode
communicationprotocol.Amaster(PCorPLC)cancommunicatewithmultipleslaves(thecurrent
product)fordataexchangeandcommunicationparameterconfiguration.RefertoTable3.1forcable
connection.

5.5.1 Hardwareconnection
TheRS485hardwarelayerisTIA/EIA‐485‐A,asillustratedbelow.Inthisconfiguration,theproduct
(MF4600)isaslave.

Figure5.3:RS485hardware


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5.5.2 Communicationparameters

ThePCUARTcommunicationparametersarelistedintable5.3.
Table5.3:PCUARTcommunicationparameters
ParametersProtocol
RTU
Baudrate(Bitspersecond)

38400bps
Startbits1
Databits8
Stopbits1
Even/OddparityNone
Bitsperiod104.2µsec
Bytesperiod1.1458msec
Maximumdatalength

20

Maximumnodes255


5.5.3 Frame

TheframefunctionisbasedonthestandardModbusRTUframing:
Table5.4:framefunction
Start_bitsAddress

Functioncodes

DataCRCStop_bits
T1‐T2‐T3‐T48bit8bitN8bit(20≥n≥0)

16bitT1‐T2‐T3‐T4

Start_bits:4periodsbittime,foranewframe.
Address: Theaddresscanbesetfrom1to255exceptfor157(0x9d).0isthebroadcastaddress.
Functioncodes: Definetheproduct(MF4600)'sfunctions/actions(slaves),eitherexecutionorresponse.
Data: Theaddressoftheregister,lengthofdata,andthedatathemselves.
CRC: CRCverificationcode.Thelowbyteisfollowedbythehighbyte.Forexample,a16bit
CRCisdividedintoBYTE_HandBYTE_L.Intheframing,theBYTE_Lwillcomefirst,then
followedbytheBYTE_H.ThelastoneistheSTOPsignal.
Stop_bits: 4periodsbittime,forendingthecurrentframe.

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5.5.4 Functioncodes

TheModbusfunctioncodesappliedfortheproductarethesub‐classofthestandardModbus
functioncodes.Thesecodesareusedtosetorreadtheregistersoftheproduct:
Table5.5:functioncodes
CodeNameFunctions
0x03ReadregisterReadregister(s)
0x06SetsingleregisterWriteonesingle16‐bitregister
0x10SetmultipleregistersWritemultipleregisters

5.5.5 Registers

Theproduct(MF4600)hasmultipleregistersavailablefortheassignmentofthevariousfunctions.Withthese
functions,theusercanobtainthedatafromtheproducts,suchasproductaddressandflowratesfromthe
registers,orsettheproductfunctionsbywritingthecorrespondingparameters.
Thecurrentlyavailableregistersarelistedinthefollowingtable,andtheregistersmaybecustomizedupon
contactthemanufacturer.WhereR:read;W:write‐only;W/R:readandwrite.
Note:Atthetimeofshipping,thewriteprotectionfunctionisenabledexceptforaddressandbaudrate.
Oncetheusercompletestheregistervaluechange,thewriteprotectionwillbeautomaticallyenabled
onceagaintopreventincidentaldataloss.
Table5.6:Registers
FunctionsDescriptionRegisterModbusreference
Address Productaddress(R/W)0x000140002(0x0001)
FlowrateCurrentflowrate(R)0x0002~0x000340003(0x0003)
TotalizerTotalizeroraccumulatedflowrate(R)0x0004~0x000640005(0x0005)
BaudrateCommunicationbaudrate(R/W)0x001540022(0x0015)
GCF*Gasconversionfactor(R/W)

0x0016

40023(0x0016)

Responsetime*Responsetimeorsamplingtime(R/W)0x001740024(0x0017)
Resetoffset*Resetorcalibrateoffset(R/W)0x002740040(0x0027)
Highflowalarm*Sethighflowratealarm(R/W)0x003140050(0x0031)
Lowflowalarm*Setlowflowratealarm(R/W)0x003340052(0x0033)
WriteprotectWriteprotectionofselectedparameters(W)

0x001440021(0x0014)
Notes:1,R–Read‐only,W–Writeonly,R/W–Readandwrite.
2,Forthe*markedfunctions,pleasedisablethewriteprotectionbeforeexecutingthecommand.
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