Flann Microwave 624 Manual de usuario

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RS485CONTROLLED

SYSTEMATTENUATOR

MODEL624

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INSTRUMENTMANUAL

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Version1.2

December2020

FlannMicrowave ModelRS485

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Model624(R485)Attenuatorv1.2 December2020 Page2of13

FlannMicrowave ModelRS485

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Model624(R485)Attenuatorv1.2 December2020 Page3of13

GENERALINFORMATION.........................................................................................4

WARRANTY..........................................................................................................................................4

DESIGNCHANGES................................................................................................................................4

SPECIFICATIONCHANGES....................................................................................................................4

REPAIRS...............................................................................................................................................4

GETTINGSTARTED...................................................................................................5

CONNECTORASSEMBLY......................................................................................................................5

ENVIRONMENTALCONSIDERATIONS.................................................................................................5

COMMUNICATIONSSET‐UP................................................................................................................6

SYSTEMFUNCTIONSANDFEATURES........................................................................7

POWER‐UPPROCEDURE......................................................................................................................7

INSTRUMENTERRORS.........................................................................................................................8

FIRMWAREUPGRADES........................................................................................................................8

RS485COMMANDSTRUCTURE................................................................................9

NOTATION...........................................................................................................................................9

QUERYCOMMANDS............................................................................................................................9

COMMANDSET...................................................................................................................................9

COMMANDEXAMPLES......................................................................................................................11

STATUSBYTE......................................................................................................................................11

COMMANDSUMMARY.....................................................................................................................12

REGULATORYINFORMATION.................................................................................13

DECLARATIONOFCONFORMITY.......................................................................................................13

WASTEELECTRICALANDELECTRONICEQUIPMENT(WEEE)REGULATIONS....................................13

FlannMicrowave ModelRS485

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Model624(R485)Attenuatorv1.2 December2020 Page4of13

GENERALINFORMATION

WARRANTY

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FlannMicrowaveLtdwarrantseachproductofitsmanufacturetobefreefromdefectsinmaterialand

workmanship.Ourobligationunderthiswarrantyislimitedtoservicingoradjustinganyproducts

returnedtoouraddressforthatpurposeandtomakegoodatourfacilityanypartorpartsthereof

(powersupplies,transistors,integratedcircuits,batteries,diodesanddisplays)withinoneyearafter

makingdeliverytotheoriginalpurchaserandwhichinourexaminationshalldisclosetoour

satisfactiontohavebeenthusdefective.SuchreturnsmusthavepriorauthorizationfromFlann

MicrowaveLtdandmustbereturnedasperourdetailedinstructionswithtransportationcharges

prepaid.WarrantyreturnsorrepairsmustfirstbeauthorizedbyFlann.Flanndoesnotauthorizeany

thirdpartytoassumeforthemanyotherliabilityinconnectionwiththeoriginalsalethanthe

foregoing.Unauthorizedtamperingwithsealedscrewswillinvalidatethewarrantyandmayresultin

damagetotheproduct.

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DESIGNCHANGES

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FlannMicrowaveLtdreservestherighttomakechangesinthedesignofitsproductswithoutreference

andwithoutincurringanyobligationtomakethesamealterationsonproductspreviouslypurchased.

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SPECIFICATIONCHANGES

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FlannMicrowaveLtdreservestherighttochangeanyspecificationnotedhereinwithoutpriornotice.

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REPAIRS

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Whenwishingtoreturninstrumentsforrepairs,orforanyotherreason,pleasecontactthisCompany

forshippinginstructions.Toexpediterepairservice,itisimportanttoprovidetypenumber,serial

numberandadetaileddescriptionofthereason,includingallfaultsymptoms,forthereturnofthe

instrument.

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FlannMicrowaveLtd

DunmereRoad

Bodmin

Cornwall

PL312QL

UnitedKingdom

Tel:+44(0)120877777

Fax:+44(0)120876426

Email:[email protected]

http://www.flann.com

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InUSAcontact

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FlannMicrowaveInc

OneBostonPlace

Suite2600

Boston

Massachusetts

MA02108‐4407

Tel:(617)6217034

Fax:(6175778234

Email[email protected]

http://www.flann.com

FlannMicrowave ModelRS485

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Model624(R485)Attenuatorv1.2 December2020 Page5of13

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GETTINGSTARTED

CONNECTORASSEMBLY

TheModel624instrumentincorporatingtheRS485interfaceissuppliedwiththefollowingmating

connectorstoMIL‐C‐26482,tobeassembledasdetailedinTables1and2.

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6‐WaySocketPinAttenuatorSignal

ARXD+

BRXD‐

CTXD‐

DTXD+

EGround

FNotused

Table1:RS485Interface

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Note1:Cablescreenisnotconnectedattheattenuatorend;itwillrequireterminationtogroundatthe

controller.

Note2:For2‐wireinterfacecontrol,connectpinsAandD(RXD+andTXD+)togetherfortheDATA+line,and

BandC(RXD‐andTXD‐)togetherfortheDATA‐line.

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2‐WaySocketPinInput Specification

A+12Vsupply

12V±1V,max2.2W

B0Vsupply

Table2:PowerSupply

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ENVIRONMENTALCONSIDERATIONS

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Theattenuatorisdesignedtooperatein‘non‐hazardous’areas.Theenvironmentinwhichtheproductisto

beusediscommercial,lightindustrial,eitherindoorsorinaprotectedoutdoorenvironment.

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TheoperatingenvironmentmustconformtotheconditionsshowninTable3.Operationoutsidethese

rangescannotbeguaranteedandmayposedangerousimplicationstotheoperatororcausemechanicalor

electricalfailuretotheequipment.Thedevicewillgenerateheatduringoperation,anditisimportantto

maintainadequateventilationorcoolingatalltimes.

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EnvironmentalConditionRanges

Temperatureoperating+5°cto+35°c

Temperaturenon‐operating0°cto+40°c

Humidityoperating(max)85%withoutcondensation

Humiditynon‐operating(max)90%withoutcondensation

Table3:EnvironmentalConsiderations

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FlannMicrowave ModelRS485

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Model624(R485)Attenuatorv1.2 December2020 Page6of13

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COMMUNICATIONSSET‐UP

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Whenconnectingtothecontrollingcomputer,eachcomputerI/OportisassignedadifferentCOMPort

number.Theseportnumberscanchangeeachtimethecomputerisstarted,soitisrecommendedthatthe

userinterrogateseachassignedCOMPorttoidentifytheonesthathaveModel624attenuatorsconnected.

Sendingthe*IDN?commandwillcausetheinstrumenttoreturnitsidentitystringincludingtheinstrument’s

serialnumber.RefertotheCommandSetsectionfordetailsofthe*IDN?command.

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Theinputbufferis50bytesmaximum.

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TheinterfaceusedisRS485,9600baudrate8n1.Either2or4wireissupported(seeTable1above).

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FlannMicrowave ModelRS485

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Model624(R485)Attenuatorv1.2 December2020 Page7of13

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SYSTEMFUNCTIONSANDFEATURES

POWER‐UPPROCEDURE

Whentheinstrumentisinitiallyconnectedtothepowersupplyitresetstothe50dBreferenceposition.This

actionmaybedisabledifrequired,howevertheinstrumentmustberesetassoonaspossibletoestablishthe

correctreferencealignment.Refertothe‘PONRST’and‘RESET’commands.

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Theinstrumentcanbeprogrammedtoreturntothelastsettingpriortopowerbeingremoved.Refertothe

‘HOLDSET’command.

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Theinstrumentissuppliedinvaluemode,coveringtherangeof0.0dBto50.0dB,withthesmallest

incrementalvaluebeing0.1dB.Itispossibletopositiontheinstrumentusingmotorstepsintherange0to

2410,givingincreasedresolutionatlowerattenuationsettings.Refertothe‘SSET’commandandTable4

below.Notethatthestepsarefromthereferencepositionof50.0dB.

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Alsonotethatwhenchangingfrom‘steps’modeto‘value’mode,theattenuatorwillenterthereset

proceduretore‐synchronisetothereferenceposition.

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AttenuationdBStepsAttenuationdBStepsAttenuationdBSteps

50.0033.0 149 16.0 562

49.0532.0 164 15.0 603

48.01131.0 179 14.0 647

47.01730.0 195 13.0 695

46.02329.0 212 12.0 746

45.03028.0 230 11.0 801

44.03727.0 249 10.0 861

43.04526.0 270 9.0 926

42.05225.0 291 8.0 997

41.06124.0 314 7.0 1075

40.07023.0 339 6.0 1162

39.07922.0 365 5.0 1260

38.08921.0 393 4.0 1371

37.010020.0 422 3.0 1501

36.011119.0 454 2.0 1661

35.012318.0 488 1.0 1875

34.013617.0 524 0.0 2410

Table4:Attenuation–StepsfromReference

Whenthehighattenuationsettingisactive,thisenablesacoarseattenuationsettingofapproximately85dB.

Refertothe‘HIGH’command.

In‘Steps’mode,itispossibletoenteranegativevalueupto‐180toachieveaveryapproximatehigh

attenuationvalue.Forexample,‐39stepsroughlyequatesto60dB.Theattenuationaccuracybeyond50dB

cannotbeguaranteed.

FlannMicrowave ModelRS485

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Model624(R485)Attenuatorv1.2 December2020 Page8of13

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INSTRUMENTERRORS

InstrumenterrorscanbeidentifiedbyinterrogatingtheStatusByte.Refertothe‘STATUS?’command

descriptionandtheStatusByteinterpretationlist,Table5.

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FIRMWAREUPGRADES

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UserswillbeabletoupgradetothelatestversionoftheModel624firmwareovertheRS485interfaceby

followingtheinstructionsgivenintheFlannMicrowaveLtdwebsite,www.flann.com.

Acopyofthelatestissueofthismanualwillalsobeavailablefordownload.

FlannMicrowave ModelRS485

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Model624(R485)Attenuatorv1.2 December2020 Page9of13

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RS485COMMANDSTRUCTURE

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Thissectiondetailsthecommandsavailableandthevalidoperandsthatmayaccompanythem.

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NOTATION

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Uppercaseboldcharactersrepresenttheprogramcodes,whichmustappearexactlyaslisted.Programcode

commandsarenotcasesensitive,ieupperandlowercasecharactersareaccepted.Notethattheinputbuffer

is50bytesmaximum.

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Charactersenclosedinthe{}bracketsarequalifiersattachedtotherootmnemonic.Aspacemaybeinserted

betweenitandtherootmnemonic.eg{ON|OFF}showsthateitherONorOFFcanbeattachedtotheroot

mnemonic.



Forexample,the‘PONRST’commandhasthreepossibleapplications:‐



1.PONRSTON‐ SwitchonthePower‐onReset

2.PONRSTOFF ‐ SwitchoffthePower‐onReset

3.PONRST?‐ QuerythepresentstateofthePower‐onReset

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Eachprogramcommandmustbeterminatedwith\n(Hex0x0a)

Forexample:‘VSET45.3\n’



QUERYCOMMANDS

Forinstrumentstatecommands(identifiedwith‘Query:Valid’),appendthequestionmarkcharacter(?)

insteadofthe{ON|OFF}tointerrogatethestateofthefunctions.Theinstrumentrespondstothequerywith

a‘1’ora‘0’toindicateOnorOff,respectively.ForasettablefunctionsuchasVSETvalue,usingVSET?causes

theinstrumenttorespondbysendingthecurrentvalueofthatfunction.

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COMMANDSET

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VSET[value]

Switchestovaluemodeandsetsthemicrowaveinstrumenttovalue

Query: Valid,returnssetting

Value 0to50.0(dB)



SSET[value]

Switchestostepsmodeandsetsthemicrowaveinstrumenttovalue

Query: Valid,returnsnumberofstepsfromreference

Value  0to1410



ASET[value]

Switchestoanglemodeandsetsthemicrowaveinstrumenttovalue

Query:  Valid,returnsvaneangle

Value 0to86.776



ISETvalue

Setsthestoredincrementtovalue

Query: Valid,returnsstoreincrement

Value0to50.00(dB)ifinvaluemode,or0to1410ifinstepsmode,0to86.776ifinanglemode



FlannMicrowave ModelRS485



Model624(R485)Attenuatorv1.2 December2020 Page10 of13



INC

Increasethemicrowaveinstrumentsettingbythestoredincrement

Query: Invalid



DEC

Decreasemicrowaveinstrumentsettingbythestoredincrement

Query: Invalid



STOREvalue

Setsthestoredsettingtovalue

Query:  Valid,returnsstoredsetting

Value 0to50.0(dB)ifinvaluemode,or0to1410ifinstepsmode,0to86.776ifinanglemode



RECALL

Setstheinstrumenttothestoredsetting

Query: Invalid



HIGH{ON|OFF}

Setsthehighattenuationfeatureonoroff

Query: Valid,returns1foron,or0foroff



HOLDSET{ON|OFF}

Returnsthemicrowaveinstrumentstothepositionwhenpowerwasremoved

Query:  Valid,returns1foron,or0foroff



MODE?

Outputsthecurrentoperatingmode

Query: Valid,returnseither0forvaluemodeor1forstepsmodeor2foranglemode



PONRST{ON|OFF}

Enablesordisablesthepower‐onreset

Query: Valid,returns1foron,or0foroff



PRECISION{ON|OFF}

Enablesordisablestheprecisionsettingfeature

Query: Valid,returns1foron,or0foroff



Note:WhenON,thisfeaturegiveshigherattenuationaccuracyandrepeatabilitybyalwaysdrivingtothe

requiredpositionfromthesamedirection.Theattenuationvaluewillgohigherthantherequiredsetting

momentarilyduringpositioningfromthe0dBdirection.Thisappliestoallmodes(angle,stepsandvalue).



PWRSTAT?

Outputsthepower‐upstatistics

Query: Valid,returnsastringof50charactersmaximum



RESET

Resynchronisetheinstrument

Query:  Invalid



*IDN?

Outputsthefullinstrumentidentitystring

Query: Valid,returnstheidentitystringoftheinstrumentincludingtheserialnumber



STATUS?

Requestthevalueofthestatusregister

Query: Valid,returnthestatusregistervalue,avaluefrom0to255

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