Et system LAB-HP User manual

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ETSystemelectronicGmbHTelefon062053948‐0
Fax0620537560
Hauptstraße119‐121info@et‐system.de
68804Altlußheimwww.et‐system.de
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LAB‐HP
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Softwareversion:V178
May2021
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TableofContents
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Info&ContactAddresses........................................................................................................................................1
TechnicalSpecifications...........................................................................................................................................1
AmbientConditions........................................................................................................................................................1
InputSpecifications........................................................................................................................................................2
OutputSpecifications.....................................................................................................................................................2
AIInterface.....................................................................................................................................................................3
RS232.............................................................................................................................................................................3
RS485.............................................................................................................................................................................3
TechnicalDrawing..........................................................................................................................................................4
ImportantSafetyInstructions..................................................................................................................................5
InitialOperation.............................................................................................................................................................5
Unpacking.......................................................................................................................................................................5
SettingUp.......................................................................................................................................................................5
VisualInspection............................................................................................................................................................5
MainsOperation............................................................................................................................................................5
FunctionalDescription.............................................................................................................................................6
GeneralSettings......................................................................................................................................................8
Configuration..................................................................................................................................................................8
Contrast..........................................................................................................................................................................8
VoltageSettings......................................................................................................................................................8
UlimitandIlimit...................................................................................................................................................................8
OVP(OverVoltageProtection).......................................................................................................................................8
AI‐Type...........................................................................................................................................................................8
RememberLastSetting..................................................................................................................................................9
M/SMode......................................................................................................................................................................9
Interfaceparameter(Option).........................................................................................................................................9
FrontPanelOperation.............................................................................................................................................9
ConsoleandRotaryPulseEncoder.................................................................................................................................9
DisplayandSettings.......................................................................................................................................................9
Currentmeasurementvalues(Display).....................................................................................................................9
Maindisplay............................................................................................................................................................10
UIdisplay.................................................................................................................................................................10
Operatingmodes..........................................................................................................................................................10
OperatingModeselection.......................................................................................................................................10
Preselectablefixedsettings.....................................................................................................................................11
OperatingModedescription...................................................................................................................................11
Universalinterface(Option)..................................................................................................................................11
Commands...................................................................................................................................................................11
Format.....................................................................................................................................................................11
InstructionSet.........................................................................................................................................................12
Quickviewofcommands........................................................................................................................................12
Detaileddescriptionofcommands..........................................................................................................................13
ResponseString.......................................................................................................................................................21
Ext.Control:Computer..........................................................................................................................................22
GPIB..............................................................................................................................................................................22
StatusWord.............................................................................................................................................................23
ESR‐Register‐Event‐Status‐Register.......................................................................................................................24
RS232Interface............................................................................................................................................................24
InterfaceReconfiguration........................................................................................................................................25
RS485Interface............................................................................................................................................................25
InterfaceReconfiguration........................................................................................................................................26
Ext.Control:AIInterface(Option)..........................................................................................................................26
PinAssignmentAIInterface.........................................................................................................................................26
AnalogInput.................................................................................................................................................................27

SetPointU(USet).....................................................................................................................................................27
SetPointI(ISet)........................................................................................................................................................27
SetPointOVP(UOVP)...............................................................................................................................................28
AnalogOutput.............................................................................................................................................................28
MonitorSetPointU(Umon).....................................................................................................................................28
MonitorSetPointI(Imon)........................................................................................................................................28
MonitorActualValueP(Pmon).................................................................................................................................28
AnalogOutputOVP(UOVPmon)..................................................................................................................................28
MonitorOutputVoltage(UIstmon)............................................................................................................................29
MonitorOutputCurrent(IIstmon)..............................................................................................................................29
DigitalInput.................................................................................................................................................................29
Activation(Ext.Control)..........................................................................................................................................29
Soft‐Interlock..........................................................................................................................................................29
Blocking(Standby)..................................................................................................................................................29
DigitalOutput..............................................................................................................................................................29
Blocking(Standby)..................................................................................................................................................29
Const.Voltagemode(CV)............................................................................................................................................29
Error.............................................................................................................................................................................30
Ext.Control:Ethernet(LAN)...................................................................................................................................30
ManualAssignmentofanIPunderMicrosoftWindows®...........................................................................................31
Monitoringthedeviceviabrowser.............................................................................................................................31
ControllingthedeviceviaTelnet.................................................................................................................................32
Controllingthedeviceviabrowser..............................................................................................................................32
Ext.Control:USB....................................................................................................................................................33
InterfaceReconfiguration.......................................................................................................................................34
DataLogFunction(Option)....................................................................................................................................34
formatofthesavedData.............................................................................................................................................34
ScriptMode...........................................................................................................................................................35
Executing/LoadingaScript..........................................................................................................................................35
Commands...................................................................................................................................................................35
Syntax.....................................................................................................................................................................35
Quickviewofcommands........................................................................................................................................35
Detaileddescriptionofcommands.........................................................................................................................36
Controller..............................................................................................................................................................40
ControlStructurePVsimModeandUserMode..........................................................................................................41
ControlStructureUIPMode........................................................................................................................................41
ControlStructureUIRMode........................................................................................................................................41
Controllerparameters.................................................................................................................................................42
SenseMode...........................................................................................................................................................42
LoadconnectionwithoutSensorConductor...............................................................................................................42
LoadConnectionwithSensorconductor.....................................................................................................................43
LoadDistributionwithoutSensorConductor..............................................................................................................44
Master/SlaveMode(M/SMode)...........................................................................................................................44
OperationModesinMaster/SlaveMode....................................................................................................................45
M/SModeOff.........................................................................................................................................................45
M/SModeParallel..................................................................................................................................................45
M/SmodeSerial.....................................................................................................................................................46
M/SmodeIndependent.........................................................................................................................................46
Overviewoftheconnectedunits................................................................................................................................46
ControllingtheunitinMaster/SlaveModeviadigitalinterface.................................................................................46
Appendix...............................................................................................................................................................48
EquivalentleakagecurrentmeasurementaccordingtoVDE0701.............................................................................48
Notes.....................................................................................................................................................................49
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Info&ContactAddresses
ETSystemelectronicGmbH 1
INFO&CONTACTADDRESSES
ETSystemelectronicGmbHwasfoundedin1986intheheartoftheRhine‐Neckar‐Triangle.Asasubsidiaryofaleading
electricityutilitygroup,thecompanyquicklytookonaleadingroleintheareaoflaboratorypowerelectronicsand
associatedelectricalmeasurement.Theexistingknow‐howinpowertechnologiesinthe90sgaverisetothe“Power
Solutions”productdivisionasastrongextensionofthehistorical“Test&Measurement”range.
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Since1997,wehavebeenworkingsuccessfullyasanindependent,privatelyheldcompanywithcustomersinalllines
ofbusinessfromindustry,medicalcare,railwaytechnologyandautomotiveelectronics.
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Bymeansofourhighverticalrangeofmanufactureandoureverexpandingdevelopmentdivisionwecanfastand
flexiblyadjusttoourcustomers’requirements.NecessaryapprovalssuchasCSA,UL,VDE,TÜVetc.areflexiblycarried
outbyqualifiedpersonnel.Theapprovalproceduresareperformedwithinthescopeofdevelopmentplanningandthus
donotnegativelyimpactthestartofmanufacturing.Permanentmanufacturingcontrolthroughaccreditedlaboratories
andanISO9001compliantqualitymanagementsystemguaranteeaconstanthigh‐levelseries‐productionquality.
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Weofferrepairsandadjustmentforunitsoutsideofourwarrantyperiod.Pleasecontactyourlocaldistributorfor
furtherinformation:
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PlaceofBusiness:Altlußheim,Germany
VATIdentificationNumber:DE144285482
RegisterCourt:Mannheim,Germany
RegisterNumber:HRB421186
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TECHNICALSPECIFICATIONS
AMBIENTCONDITIONS
CoolingFan
Germany
ETSystemelectronicGmbH
Hauptstraße119‐121
68804Altlußheim
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Germany
Phone:+49(0)620539480
Fax:+49(0)620537560
em@il:info@et‐system.de
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web:www.et‐system.de

TechnicalSpecifications
2ETSystemelectronicGmbH
Operatingtemperature0‐50°C
Storagetemperature‐20‐70°C
Humidity<80%
Operatingaltitude<2000m
Vibration10‐55Hz/1min/2GXYZ
Shock<20G
Weight5kW19kg,10kW26kg,15kW33kg
INPUTSPECIFICATIONS
Version5kW10kW15kW20kW30kW45kW60kW
Connection5wire(3P+N+E)
Input3P/2083x208Vac(187‐229Vac47‐63Hz)
Input3P/4003x400Vac(360‐440Vac47‐63Hz)
Input3P/4403x440Vac(396‐484Vac47‐63Hz)
Input3P/4803x480Vac(432‐528Vac47‐63Hz)
Max.allowednonsymmetry<3%
InputCurrent(3phase)
3P/400model1,211.5Aeff22.9Aeff34.4Aeff45.8Aeff68.7Aeff103.1Aeff137.5Aeff
InrushTransientCurrent2<25<51<76<102<153<229<305
NominalCurrentInternalFuse320A40A60A80A120A180A240A
BreakingCapacity
Fuse/AutomaticFuse3built‐inCircuitBreaker:KLK20A
RecommendedSupplyBreaker
(valueandcurve)
16A
TypeD/K
32A
TypeD/K
63A
TypeD/K
63A
TypeD/K
<80A
TypeD/K
<120A
TypeD/K
<150A
TypeD/K
LeakageCurrent<35mA<35mA<35mA<35mA<35mA<35mA<35mA
Cosphi>0.7>0.7>0.7>0.7>0.7>0.7>0.7
HarmonicContent4
50Hz=72%
100Hz=2%
150Hz=0,9%
200Hz=0,1%
250Hz=11%
350Hz=0.6%
EfficiencyType194%94%94%94%94%94%94%
DissipatedPower300W600W900W1,200W1,800W2,700W3,600W
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OUTPUTSPECIFICATIONS
Staticvoltageregulation±0.05%+2mV
Staticcurrentregulation±0.1%+2mA
Dynamicregulation<1‐3ms(typ.)
Ripple<0.2%RMS(typ.)
Stability±0.05%
Programmingaccuracy(Vout)±0.05%+2mV
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1fornominalcurrentandnominalvoltage
2fornominalinputvoltage
3internalmainfuse
4totalharmonicdistortioninputcurrent([%]/Iein)

TechnicalSpecifications
ETSystemelectronicGmbH 3
Programmingaccuracy(Iout)±0.05%+2mA
Displayaccuracy(Vout)<±0.5%
Displayaccuracy(Iout)<±0.5%
Isolation3,000V
Overvoltageprotection0‐120%Vmax
CircuitprotectionOC/OV/OT/OP
LineRegulation<±0.1%+2mV
AIINTERFACE
Digitaloutputs
(CV,Standby,Error)
Outputtype:Opencollectorwithpull‐upresistor10kafter+5V
Isinkmax:50mA
Digitalinputs
(Ext.Control,Standby)
Inputresistance:47kΩ
Maximuminputvoltage:50V
Highlevel:Ue>2V
Lowlevel:Ue<0.8V
Analogoutputs(Xmon)
Outputresistance:100Ω
Minimumpermissibleloadresistance:2kΩ
Imax:5mA
Minimumloadresistancefor0.1%accuracy:100kΩ
Analoginputs(Xset)Inputresistance:1MΩ
Maximumpermissibleinputvoltage:25V
Referencevoltage
ReferencevoltageUref:10V±10mV
Outputresistance:<10Ω
Maximumoutputcurrent:10mA(notshort‐circuit‐proof)
5V‐SupplyvoltageOutputvoltage:5V±300mV
Maximumoutputcurrent:50mA(notshort‐circuit‐proof)
RS232
Signalinputs(RxD,CTS)
Maximuminputvoltage:±25V
Inputresistance:5kΩ(Type)
Switchingthresholds:UH<‐3V,UL>+3V
Signaloutputs(TxD,RTS)
Outputvoltage(atRLast>3kΩ):min±5V,Type±9V,max±10V
Outputresistance:<300Ω
Shortcircuitcurrent:Type±10mA
RS485
Maximuminputvoltage±5V
Inputresistance>12kΩ
Outputcurrent±60mAMax
HighlevelUd>0.2V
LowlevelUd<‐0.2V

TechnicalSpecifications
4ETSystemelectronicGmbH
TECHNICALDRAWING
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ImportantSafetyInstructions
ETSystemelectronicGmbH 5
IMPORTANTSAFETYINSTRUCTIONS

Pleasereadthismanualthoroughlybeforeputtingthedevice
intooperation.Payregardtothefollowingsafetyinstructions
andkeepthismanualnearbyforfuturepurpose.

Thisoperatingmanualisbasedonthestateoftechnologyatthetimeofprinting.However,itispossiblethatdespite
regularcontrolandcorrection,thepresentdocumentcontainsprintingerrorsordeficiencies.ETSystemelectronic
GmbHassumesnoliabilityforanytechnical,printingortranslationalerrorswithinthismanual.
INITIALOPERATION
UNPACKING
Pleasemakesurethattheshippingcartonandthepackagingisfreeofdamage.Ifexternaldamageisfound,itis
importanttorecordthetypeofdamage.Pleasekeeptheoriginalpackagingtoensurethedeviceisadequatelyprotected
incaseitneedstobetransportedinthefutureorclaimsforcompensationneedtobeasserted.
SETTINGUP
Toavoidelectricshocksandproductfailure,thedeviceshouldbeinstalledinatemperatureandhumiditycontrolled
indoorenvironment.Theambienttemperaturemustnotexceed50°C.Thedevicemustneverbeexposedtoliquidsor
extremehumidity.
VISUALINSPECTION
Theunitmustbeexaminedimmediatelyfordefectsordamagesintransit.Damagescausedduringtransportmaybe
looseorbrokencontrolknobsandbentorbrokenconnectors.Donotusethedeviceifanyphysicaldamageisapparent.
PleaseinformthecarriersandarepresentativeofETSystemelectronicimmediately.
MAINSOPERATION
Makesuretoverifythemodelnumberandvoltagestatedonthenameplate.Damagesduetowrongpowerfeedare
notcoveredbyguaranteeconditions.
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Theunitmustonlybeoperatedwhenconnecteddirectlytothe
mains.Toavoiddamage,donotconnecttheunitto
isolatingtransformers,auto‐transformers,magneticcurrent
limitersorsimilardevices.
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FunctionalDescription
6ETSystemelectronicGmbH
FUNCTIONALDESCRIPTION
Thefollowingblockdiagramgivesinformationaboutthevariousadjustmentoptions.

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Basically,fourdifferentoperationmodesareavailable:

UImodeUnitisoperatedwithcurrentandvoltagelimitation.
UIPmodeUnitisoperatedwithcurrent,voltageandpowerlimitation.
UIRmode
Unitisoperatedwithcurrent,voltageandpowerlimitation.Additionally,thesetvaluefor
voltageiscalculatedbymeansofthepresentoutputcurrenttosimulateaninternal
resistance..
TablemodeSetvaluesforcurrentandvoltagearesavedinatable.Therefore,UIcharacteristicscanbe
easilyadjusted.

Therearethreedifferentwaystoprogramthetable:

PVsimmodeTheUIcharacteristicofasolargeneratoriscalculatedwiththeUo,Ik,UmppandImpp
parametersandthenwrittentothetable.
MemorycardThetablecanbeprogrammedusingascriptfromamemorycard.
Ascriptisasimpletextfile(ScriptControl).
DigitalinterfaceThetablecanbeprogrammedusingthedigitalinterface(UniversalInterface,WAVE
Commandbzw.DATCommand).
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FunctionalDescription
ETSystemelectronicGmbH 7
ATE‐Unit
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AnATEunithasnofrontpanel.Itcanbecontrolledviaanaloginterface(page26ff)orviauniversalinterface(page11
ff).
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ExampletocontroltheLAB/HPovertheuniversalinterface:
ConnectthedevicetotheRS232port(Page25ff,defaultparameter9600Baud,8Databits,1Stopbit,noparity,no
handshake).
Startaterminalprogram(forexampleTerraTermPro).
Typefollowcommands:
*IDN?(TheLAB/HPwillresponsehisIdstring)
OVP,100(Setovervoltageprotectionto100V,noresponse)
UA,10(Setoutputvoltageto10V,noresponse)
IA,1(Setoutputcurrentto1A,noresponse)
SB,R(Enabletheoutput,noresponse)
MU(Readtheactualoutputvoltage)
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ConfigurationoftheAIinterfaceviadigitalinterface:

Syntax:AI[,{5|10}[,{UI|UIP}[,<Filterlevel>]]]

Parameter:
5,10    5V‐or10V‐Mode
IP,UIPUI‐modeorUIP‐Mode
Filterlevel   rangeofvalues0..10

Examples:
AI,10
AI,5,UIP
AI,10,UI,8
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Thechangesaresavedpermanently.
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Controlviaanaloginterface:
ConnecttheAIinterfacelikethewiringdiagramonpage27.Closethe“Externcontrolswitch”.
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Theadjustmentofsetpointsandtheselectionofanoperationmodeareperformedviaconsole(FrontPanel
Operation),interface(UniversalInterface)oranalog/digitalIO(Ext.Control:AI‐Interface).
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Inorderofpriority,commandswhichhavebeensentbyinterfacecomefirst,byanalog/digital‐IOcomesecondandby
keyboardcomethird.Forexample,iftheinterfacespecifiesthesetpoint,thecorrespondingvalueswillbesent‐
irrespectiveofothersettings‐totheoutput.
Anothereasywaytoautomatefunctionsisofferedbyscriptcontrol(ScriptControl).Alistofcommandsissavedto
thescriptmemoryandenablestheusertochangethechronologicalsequenceofcertainsettings.Thescriptmemory
canbeprogrammedviamemorycardordigitalinterface.
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Measurementvaluesofthelatestoutputdataarepermanentlyavailableatallinterfaces.Therefore,thepresentoutput
voltagecanbereadfromthedisplayorviadigitalinterface,whilethecontroloftheunitiscarriedoutviaanalog/digital
IO.

GeneralSettings
8ETSystemelectronicGmbH
GENERALSETTINGS
CONFIGURATION
TheconfigurationmenucanbeaccessedbyholdingthebuttonDisplay(lowerbutton)foratleast1second.Thisopens
amenuwheregeneralsettingsoftheunitcanbechanged.
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ThesesettingsareUlimit,Ilimit,OVPandRememberlastsetting.Providedtheunitisequippedwiththeseoptions,AIType
andM/Smodecanalsobeselected.
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Pushingtherotarypulseencoderselectsindividualparameters.Turningtherotarypulseencoderselectsthedesired
value.PushingthebuttonDisplayasecondtime,openstheconfigurationmenufordigitalinterfaceparameters.
CONTRAST
Aftertheunithasbeenswitchedon,thedisplayshowstheETSystemlogo.Thecontrastofthedisplaycanbeadjusted
byusingtherotarypulseencoder.Afterwards,thecontrastwillbesavedautomatically.
VOLTAGESETTINGS
ULIMITANDILIMIT
Ulimitlimitsthemaximumoutputvoltage.Theoutputvoltageislimitedtotheselectedvalue,irrespectiveofthevalues
thathavebeensetatthefrontpaneloratoneoftheinterfaces.Theadjustmentrangeis0Vuptothemaximumrated
voltageofthedevice.
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Ilimitlimitsthemaximumoutputcurrent.Theoutputcurrentislimitedtotheselectedvalue,irrespectiveofthevalues
thathavebeensetatthefrontpaneloratoneoftheinterfaces.Theadjustmentrangeis0Auptothemaximumrated
currentofthedevice.
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Thesesettingscanonlybechangedatthedisplayandtheyapplytoallinterfaces.
OVP(OVERVOLTAGEPROTECTION)
Theoutputisshutimmediatelyiftheoutputvoltageexceedstheselectedvalue.Thedisplayindicatesthisstatuswith
theword‚OVP‘.Toresetthiserror,pushthebuttonStandby.TheOVPvalueappliestothefrontpaneloperation.
TheremayapplydifferentvaluesfortheAI‐interfaceandthedigitalinterface.Thedigitalinterfaceisinitializedwiththe
valuewhichhasbeenadjustedonthefrontpanel.Theadjustmentrangeis0Vuptothemaximumratedvoltageofthe
device+20%.
AI‐TYPE
Thisfeatureadjuststhevoltagelevelsofanaloginputsignalsandanalogoutputsignals.Selectablerangesare0‐5Vand
0‐10V.

FrontPanelOperation
ETSystemelectronicGmbH 9
REMEMBERLASTSETTING
Ifthisoptionisactivated(‚On‘),selectedparameterswillbekeptafterablackout.Ifthisoptionisdeactivated(‚Off’),
standardsetting(0V/0A/UI‐Mode)willbeloadedaftersupplyvoltageisenabled.
M/SMODE
ThefollowingadjustmentscanbemadeifM/S‐Modeisactivated(Master/Slave‐Mode):

Offnomaster/slave
Parallelparallelconnectedoutputs
Serialserialconnectedoutputs
IndependentIndependentoutputs,changeofsetvaluesviabusonly
INTERFACEPARAMETER(OPTION)
Thedisplayshowsallavailabledigitalinterfacesandtheirchangeableparameters.Theseparameterscanbeselectedby
pushingtherotarypulseencoderandchangedbyturningtherotarypulseencoder(functionoftheparameters
UniversalInterface).
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FRONTPANELOPERATION
CONSOLEANDROTARYPULSEENCODER
Thefrontpanelconsistsofarotarypulseencoder(withbuttonfunction)andtwobuttons.Theupperbuttonswitches
theunitintostandbyorrunmode.

Thelowerbuttonchangesthedisplaymode.Pushingandholdingthisbuttonfor1secondopenstheinterface
configurationmenuforinterfacesettings(DisplayandSettings)andinterfaceparameters(InterfaceParameter).

Therotarypulseencoderadjuststhesetvalue.Pushingtherotarypulseencoderselectsthevaluetobechanged.
DISPLAYANDSETTINGS
Currentmeasurementvalues(Display)
Innormalmode,pushingthebuttonDisplayswitchesbetweentwodifferentoverviewscreens.

FrontPanelOperation
10ETSystemelectronicGmbH
Maindisplay
Themaindisplayshowscurrentmeasureandsetvalues.Ontheleftsideofthisscreen,presentvoltageandcurrent
valuesaredisplayedaswellastheresultingpower(P=U*I)andresistance(R=U÷I).Thesetvaluesaredisplayedon
therightsideofthescreen(‚Preset‘)andvaryaccordingtotheoperationmodeoftheunit.



ThelowerrightsectionofthescreenshowsthecurrentControlModeoftheunit:

LocFrontpaneloperation
ScrMemorycardoperation
AIAnaloginterfaceoperation
RemInterfaceoperation
LLOInterfaceoperation,Frontpaneloperationlocked
DisUnitlockedviainterlockinput(Option)

ThesectiontotheleftofthecontrolmodedisplayshowsthecurrentOperatingStatusoftheunit:

StandbyStandbymode
U‐LimitVoltagelimitationmode
I‐LimitCurrentlimitationmode
P‐LimitPowerlimitationmode
OVPdeactivationoftheunitbyovervoltageprotectionmode

ThesectionabovetheoperatingstatusdisplayshowsthecurrentOperatingModeoftheunit:

UIVoltageandcurrentlimitation
UIPVoltage,currentandpowerlimitation
UIRVoltageandcurrentlimitation,simulatedinternalresistance‐
PVsimsimulationofaphotovoltaiccharacteristic
Usersimulationofauser‐definedcharacteristic
UIdisplay
TheoutputdiagramisdisplayedasanUIcharacteristic.Thepicture
ontherightsideshowstheoperatingmodeUIR.Asmalldotshows
theactualoperatingpointoftheunit.Thediagramisalwaysrelative
totheselectedvalues.Forexample,thecurrentlimitationwouldbe
changedfrom100Ato50A,theinternalresistancewouldbe
doubled,whilethediagramwouldstaythesame.Ahorizontalpartof
thediagramcorrespondsthento50Aandnotto100A.

OPERATINGMODES
OperatingModeselection
Operatingmodescanonlybeselectedwhenthemaindisplayisvisible.Pushingtherotarypulseencoderswitchesthe
focus(selectedmodeisinverted)throughthedifferentmodes.Oncetheoptionisfocused,theoperatingmodecanbe
selectedbyturningtherotarypulseencoder.Theunitneedstobeinstandbymode,otherwisetheoption‚Mode‘isnot
selectable.
UOutputvoltage
IOutputcurrent
POutputpower(UIPmodeonlyUIPmode)
RiInternalresistance(UIRmodeonlyUIRmode)
UmppMPPvoltage(PVsimmodeonlyP
V
simmode)
ImppMPPcurrent(PVsimmodeonlyP
V
simmode)

Universalinterface(Option)
ETSystemelectronicGmbH 11
Preselectablefixedsettings
Fixedsettingscanbesavedandselectedwhichmeansthatfrontpaneloperationisinactive.Foractivationor
deactivationthebuttonStandbymustbepressedandheldwhenthedeviceisswitchedonuntiltheET‐Systemlogo
fadesout.

Toactivatethefixedsettings,thedevicemustbeswitchedonandtheoption‚RememberLastSetting‘mustbeactivated.
Thedesiredsetvaluescanbeadjustedandthedevicemustbeswitchedoff.ThebuttonStandbymustbepressedand
heldwhilethedeviceisswitchedonuntiltheET‐Systemlogofadesout.Thedevicewillloadthelastsetvaluesdirectly
onpowerup.Frontpaneloperationisinactive.Thisstatusissignalizedbytheword‚Dis‘inthelowerrightcornerofthe
display.Todeactivatethismode,thebuttonStandbymustbepressedwhenswitchingonthedevice.
OperatingModedescription
UIMode
InUImode,thesetvaluesforvoltageandcurrentaretransferreddirectlytotheswitchmoderegulator.Thereisno
additionaldigitalcontrol.
UIPMode
InUIPmode,thesetvaluesforvoltageandcurrentaretransferreddirectlytotheswitchmoderegulator.Iftheoutput
currentexceedsthepreviouslyadjustedlimitvalue,thecurrentsetpointwillberegulated.
UIRMode
InUIRmode,thevoltagesetpointisregulatedinawaythatapowersupplyunitwith(adjustable)internalresistanceis
simulated.Thesetvalueforcurrentlimitingistransferreddirectlytotheswitchmoderegulator.
PVsimMode
InPVsimmode,thediagramofaPVgeneratorissimulated.Givenvaluesareopen‐circuitvoltageUo,short‐circuitcurrent
Ik,aswellastheamountsofvoltageandcurrentbywhichthePVgeneratordeliversthemaximumpower(Umpp,Impp).
ParameterscanbefoundinthespecificationsheetofthesimulatedPVgenerator.

ValuesforUmppmaybeinarangefrom0.6to0.95*U.
ValuesforImppmaybeinarangefrom0.6to0.95*I.

ScriptMode
Inscriptmode,theunitiscontrolledbymemorycard.Thedisplay‚Mode‘showsthepresentoperatingmode‚UI‘.The
lowerrightcornerofthedisplayshowstheword‚Scr‘,whichindicatesthatscriptoperationwasselected.Ifthereisno
memorycardintheslot,thisoptioncannotbeselected.Fordetailedinformationaboutmemorycardcontrolandabout
howtobuildupascript,seeScriptControl.
UNIVERSALINTERFACE(OPTION)
Allinterfacesofthedigitalinterfaceareequal.Thereisnoshiftbetweentheinterfaces.Forexample,thefirstcommand
canbeissuedviatheIEEEinterfacewhilethesecondcommandcanbeissuedviatheRS232interface.Thereturnvalues
willbesentfromthatinterfacethecommandwasissuedfrom.
COMMANDS
CommunicationisbasedonanASCIIprotocol.Thefollowingchaptersdescribehowtowriteacommandandgivean
overviewoverthecommands.
Format
Acommandconsistsofthecommandword,aparameter(ifnecessary)andaterminator.Thecharacterforthe
terminatorisCarriageReturn<CR>orLineFeed<LF>.


Universalinterface(Option)
12ETSystemelectronicGmbH
CharacterASCIIDecvalueHexvalue
CarriageReturn<CR>130d
LineFee<LF>100a

Ifthecommandcontainsa<DEL>or<ESC>character,itwillnotbeprocessed.Therefore,acommandcanbecancelled
whileentering.Though,aterminator(<CR>or<LF>)isnecessary.

CharacterASCIIDecvalueHexvalue
Escape<ESC>271b
Delete<DEL>1277f

Commandsarenotcasesensitiveandmaybemixedup.Therefore,theeffectofthefollowingcommandsisthesame:
GTL,Gtl,gTL.Decimalplacesareoptionalandseparatedbyafullstop‘.‘.Thenumberofdecimalplacesisnotlimited.
Therefore,theeffectofthefollowingcommandsisthesame:UA,10,UA,10.0,UA,10.000000000,UA,0010,UA,010.0000

Thenumberofdecimalplacestobeanalyzeddependsonparameterandunittype.Itcorrespondstothenumberof
decimalplaces,acommandwithoutaparameterwouldreturn.Asarule,decimalplacesareanalyzeduntilaresolution
of0.1%isreached.

Example: Evaluation of decimal places
LAB/HP with 600 V, 25 A
600 V * 0.1 % = 0.6 V one decimal place
25 A * 0.1 % = 0.025 A three decimal places

Optional,afteranumericalvalue,alettermaybeaddedtoindicatetheunit.However,thisletterwillnotbeanalyzed.

Example: Attached letter as unit
UA,10.0 V Resets output voltage to 10 V
UA,10.0 m Caution! The ‚m‘ will not be evaluated, output voltage here is also 10 V

Example: A valid command with corresponding hex values
U A , 1 0 . 2 <CR>
55 h 41 h 2 ch 31 h 30 h 2 eh 32 h 0 dh
Example: Adjustment of output voltage 10 V/5 A (full command sequence)
OVP,100 adjusts OVP to 100 V
UA,10 adjusts output voltage to 10 V
IA,5 current limiting 5 A
SB,R output enabled
InstructionSet
TheIEEE‐488.2standarddemandsseveralbasiccommands.Somecommandsmayoccurtwiceforcompatibilityreasons
(onceintheETSversionandonceinthe(old)IEEE‐488.2version).Thefollowingsyntaxisusedtodescribethe
commands:
[]Squarebracketsoptionalparameter
<>Anglebracketnumericalvalue
{}Curlybracketselectionlist
|Verticallineseparatorwithinselectionlist

Example
GTR[,{0|1|2}] means that the command GTR can be used with or without parameters. If a parameter exists, it has to be 1, 2 or 3. Valid
commands are: GTR GTR,1 GTR,2 GTR,3
IA[,<imax>] means that the command IA can be used either with or without parameters. If a parameter exists, it has to be a numerical
value.
Quickviewofcommands
CommandDescriptionResult

Universalinterface(Option)
ETSystemelectronicGmbH 13
CLS*orCLSClearStatusDeletesthestatusbyte
DAT,<U>,<I>DIPDataforuser‐definedcharacteristic
DCLDeviceClearInitializationdatareset
GTLGoToLocalActivatesfrontpaneloperation
GTR[,{0|1|2}]GoToRemoteActivatesdigitalinterfaceoperation
IA[,<imax>]SetImaxAdjustscurrentlimiting
IDor*IDN?IdentificationDisplaysidentificationstring
IMPP[,<impp>]SetImppAdjustsMPPcurrentduringPVsimmode.
LLOLocalLockoutDeactivatesLOCALbutton
LIMILimitIaReadsmaximumadjustablecurrentlimitation
LIMPLimitPaReadsmaximumunitoutput.
LIMRLimitRReadsadjustablerangeforRiwithinUIRmode.
LIMRMAXLimitRmaxReadsmaximumadjustablerangeforRiwithinUIRmode.
LIMRMINLimitRminReadsminimumadjustablerangeforRiwithinUIRmode.
LIMULimitUaReadsmaximumadjustablevoltagelimitation
MODE[,{UI|UIP|UIR|PVSIM|
USER|Skript}]SetModeSelectsoperationmode
MU[,<Nr>]MeasureUaMeasurespresentoutputvoltage
MI[,<Nr>]MeasureIaMeasurespresentoutputcurrent
*OPT?OptionalIdentificationQueryDisplaysunitscurrenthardware/softwareversion
OVP[,<Uovp>]OvervoltageProtectionAdjustsovervoltageprotection
PA[,<Plimit>]SetPmaxAdjustspowerlimitation
PCx[,<baud>,<parity>,
<databits>,<stopbits>,
<handshake>,<echo>,
<timeout>]
Program
CommunicationAdjuststheinterfaces
RA[,<Ri>]SetRiAdjustsinternalresistance
REGLER[,<Nr>,<Kp>,<Ki>,
<Kd>]ControllerParametersAdjustscontrollerparametersforUIP,UIRandPVsimmode
RIor*RSTResetInstrumentResetshardware(noreturnvalue)
SB[,{S|R|1|0}]StandbyEnables/blockstheoutput
SCR[,<CMD>[,<value>]]LoadScriptProgrammingofscriptmemory
SSor*PDUSaveSetupSavespreviouslymadechannelandinterfaceparameteradjustments(noreturn
value)
STATUSStatusQueryoftheunitsstatus(returnvaluesinbinaryformat)(alsoseefollowing
table)
STBor*STB?InterfaceStatus 
UA[,<ua>]SetUaAdjustsoutputvoltage(iftherearenoparameters,presentsetpointis
displayed)
UMPP[,<umpp>]SetUmppAdjustsMPPvoltageinPVsimmode(iftherearenoparameters,presentsetpoint
isdisplayed)
WAVEEndUserwaveDataEndstransferofuser‐definedoutputcharacteristic(gradualinterpolationof
intermediatevalues)
WAVELINEndUserwaveDataEndstransferofuser‐definedoutputcharacteristic(linearinterpolationof
intermediatevalues)
WAVERESET,<Um>,<Im>StartUserwaveDataStartstransferofuser‐definedoutputcharacteristic
Detaileddescriptionofcommands
CLS*orCLS‐ClearStatus
Thiscommanddeletesthestatusbyte.Itaffectsonlythestatusbyteoftheinterface,thecommandwassentfrom.No
returnvalue.Fordetaileddescriptionofthestatusbyteseethedifferentinterfacechapters.
DAT,<U>,<I>‐Data
Dataforauser‐definedcharacteristic.Noreturnvalue.FordetaileddescriptionofthiscommandseeWavereset.
DCL‐DeviceClear
Thiscommandresetstheinitializationdata.Noreturnvalue.
Caution:Interfaceparametersarealsoreset!
GTL‐GoToLocal
Thiscommandactivatesfrontpaneloperation.If‚LocalLockout‘(LLO)wasactivatedbefore,itwillalsobereset.No
returnvalue.

Universalinterface(Option)
14ETSystemelectronicGmbH
GTR[,{0|1|2}]‐GoToRemote
Thiscommandactivatesdigitalinterfaceoperation.Theoptionalparameteraffectsthefuturebehavioroftheunitafter
switchon.Settingissavedpermanently.Noreturnvalue.

Optional parameter 0 = Deactivates automatic remote operation
The command GTR must be entered to activate the unit’s remote operation mode. This mode is useful if the unit shall be operated
manually and at the same time, measurement values shall be read out via the digital interface.

Optional parameter 1 = Activates remote operation on first addressing
Unit switches to remote operation when receiving a command via digital interface. The only exception is the GTL command, which switches
the unit to local mode.

Optional parameter 2 = Activates remote operation immediately after switch on
After the unit was switched on, remote mode is immediately activated. Front panel operation is deactivated.
IA[,<imax>]‐SetImax
Thiscommandadjustscurrentlimiting.Enteringthecommandwithoutparametersdisplaysthesetvalue.Iftheset
valueishigherthanthemaximumcurrentoftheunit,therange‐error‐bitwithintheESRregisteroftheinterfaceisset.
Thepresentsetvalueremainsunchanged.IfthesetvalueishigherthantheIlimitvalue,whichwasadjustedbytheuser’s
settings,butlowerthanthemaximumcurrentoftheunit,thecurrentislimitedtotheIlimitvalue.Noerrormessage.

Example: 300 A unit, Ilimit adjusted to 200 A via configuration menu
GTR Remote operation
OVP,200 Over voltage protection 200 V
UA,10 Output voltage 10 V
IA,100 Output current 100 A
SB,R Output open
IA,400 Output current 400 A, this command is ignored, because the current is higher than the maximum current of the device.
„Rangeerror“ is set within the status byte.
IA,250 Output current 250 A, since the output current was limited to 200 A via configuration menu, current limiting is set to 200
A. Error bit is not set.
IA Query of the adjusted current.
IA,200.0A Unit answers: Ilimit = 200 A
In master/slave mode, the current of a programmed device is adjusted. Connected in parallel, the total current is n x IA.

Example:
In M/S mode, 3 devices are connected parallel. IA,10 programs an output current of 10 A. All connected devices are set to 10 A. Since 3
devices have been connected parallel, the total current is 3 x 10A = 30A.
IDorIDN?‐Identification
Thiscommanddisplaystheidentificationstring.Returnvalue:<ID‐String>.


IMPP[,<impp>]‐SetImpp
ThiscommandadjuststheMPPcurrentforPVsimmode.Enteringthecommandwithoutparametersdisplaystheset
value.Ifthesetvalueishigherthanthemaximumcurrentoftheunit,therange‐error‐bitwithintheESRregisterofthe
interfaceisset.Thepresentsetvalueremainsunchanged.IfthesetvalueishigherthantheIlimitvalue,whichwas
adjustedbytheuser’ssettings,butlowerthanthemaximumcurrentoftheunit,thecurrentislimitedtotheIlimitvalue.
Noerrormessagefollows.

Example:

GTR Remote operation
OVP,200 Over voltage protection
UA,50.5 Open circuit voltage of a 50.5 V simulated PV generator
IA,10 Short circuit current of a simulated 10 A PV generato
r
UMPP,40.4 MPP voltage of a simulated 40.4 V PV generato
r
IMPP,8.2 MPP current of a simulated 8.2 A PV generator
MODE,PVSIM Activates PV simulation mode
SB,R Output open

In master/slave mode, the current of a programmed device is adjusted. In parallel connection the total current is n x IA.

Universalinterface(Option)
ETSystemelectronicGmbH 15
LIMI‐LimitIa
Withthiscommandtheusercanreadthemaximumadjustablecurrentlimiting.

Example: 300A unit, Ilimit was adjusted to 200 A via configuration menu
LIMI Query of maximum adjustable current
LIMI,200.0A Unit answers: Ilimit = 200 A
LIMP‐LimitPa
Withthiscommandtheusercanreadtheunit’smaximumoutput.

Example: 10 kW unit
LIMP Query of units output
LIMP,10000 Unit answers: 10 kW
LIMR‐LimitR
WiththiscommandtheusercanreadtheadjustablerangeforRiwithinUIRmode.

Example:
LIMR Query of adjustable internal resistance
LIMR,0.015R,1.00R Unit answers: 15 mOhm up to 1 Ohm
LIMRMAX‐LimitRmax
WiththiscommandtheusercanreadthemaximumadjustablerangeforRiwithinUIRmode.

Example:
LIMRMAX Query of maximum adjustable internal resistance
LIMRMAX,1.000R Unit answers: 1 Ohm
LIMRMIN‐LimitRmin
WiththiscommandtheusercanreadtheminimumadjustablerangeforRiwithinUIRmode.

Example:
LIMRMIN Query of minimum adjustable internal resistance
LIMRMIN,0.015R Unit answers: 15 mOhm


LIMU‐LimitUa
Readsmaximumadjustablevoltagelimitation.Thiscommandrequeststhepreviouslydefinedmaximumoutputvoltage.

Example: 300 V unit was adjusted to 200 V via configuration menu
LIMU Query of maximum adjustable current
LIMU,200.0V Unit answers: Ulimit = 200 V
LLO‐LocalLockout
ThiscommanddeactivatestheLocalbutton.UnitcannotbeswitchedtolocalmodebyholdingthebuttonStandby.
Noreturnvalue.
MI[,<Nr>]‐MeasureIa
Thiscommandmeasuresthepresentoutputcurrent.

Example:
GTR Remote operation
OVP,200 Over voltage protection 200 V
UA,10 Output voltage 10 V
IA,1 Output current 1 A
SB,R Output open

Universalinterface(Option)
16ETSystemelectronicGmbH
MI Measures present output current
MI,0.567A Unit answers: 567 mA

Inmaster/slavemodewithparallelconnectionthetotalcurrentofallconnecteddevicesisdisplayed.Usingthe
parameter<Nr>willshowthevalueofeachconnecteddevice.Numberingstartswith0.

Example:
MI,2 displays the measured output current at the bus of device number 3.
MODE[,{UI|UIP|UIR|PVSIM|USER|Skript|0|1|2|3|4|5}]‐SetMode
Thiscommandselectstheoperationmode.Enteringthecommandwithoutparameterdisplaysthepresentlyselected
operationmode.Enteringthecommandwithparameteractivatestheoperationmode.Alternatively,theoperation
modecanbeindicatedasnumber.

Thefollowingtableshowsthedifferentsettings:
CommandFunction
MODE,UI
MODE,0UImodeisactivated
MODE,UIP
MODE,1UIPmodeisactivated
MODE,UIR
MODE,2UIRmodeisactivated
MODE,PVSIM
MODE,3PVsimmodeisactivated
MODE,USER
MODE,4
User‐definedUIcharacteristicisactivated.Thecharacteristicisdefinedwiththe
commandsDAT,WAVE,WAVELINandWAVERESET.
MODE,SKRIPT
MODE,5
Scriptmodeisactivated.Thescriptisreadfromthememorycardorloadedafter
thecommandSCRhasbeenentered.








MU[,<Nr>]‐MeasureUa
Thiscommandshowsthemeasurementvalueofthepresentoutputvoltage.

Example:
GTR Remote operation mode
OVP,200 Over voltage protection 200 V
UA,10 Output voltage 10 V
IA,1 Output current 1 A
SB,R Output open
MU Measures present output voltage
MU,10.0V Unit answers: 10 V

Inmaster/slavemodewithserialconnectionthetotalcurrentofallconnecteddevicesisdisplayed.Usingtheparameter
<Nr>willshowthevalueofeachconnecteddevice.Numberingstartswith0.

Example:
MU,1 displays the measured output voltage at the bus of device number 2.
*OPT?‐OptionalIdentificationQuery
Thiscommanddoesanoptionalidentificationquery,whichmeansitdisplaysthesoftwareversion.

Example: