Agilent Technologies 6613C Headers, Query Indicator, Message Unit Separator, Root Specifier

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Introduction to Programming - 2

Data

Keywords

Message Unit

Query Indicator

VOLT : LEV 20 ; PROT 21 ; : CURR? <NL>

Keyword Separator

Message Unit Separators

Message Terminator

Root Specifier

Figure 2-2. Command Message Structure

The Message Unit

The simplest SCPI command is a single message unit consisting of a command header (or keyword) followed by a message terminator. The message unit may include a parameter after the header. The parameter can be numeric or a string.

ABORt<NL>

VOLTage 20<NL>

Headers

Headers, also referred to as keywords, are instructions recognized by the dc source. Headers may be either in the long form or the short form. In the long form, the header is completely spelled out, such as VOLTAGE, STATUS, and DELAY. In the short form, the header has only the first three or four letters, such as VOLT, STAT, and DEL.

Query Indicator

Following a header with a question mark turns it into a query (VOLTage?, VOLTage:PROTection?). If a query contains a parameter, place the query indicator at the end of the last header (VOLTage:PROTection? MAX).

Message Unit Separator

When two or more message units are combined into a compound message, separate the units with a semicolon (STATus:OPERation?;QUEStionable?).

Root Specifier

When it precedes the first header of a message unit, the colon becomes the root specifier. It tells the command parser that this is the root or the top node of the command tree.

Message Terminator

A terminator informs SCPI that it has reached the end of a message. Three permitted messages terminators are:

newline (<NL>), which is ASCII decimal 10 or hex 0A.

end or identify (<END>)

both of the above (<NL><END>).

In the examples of this guide, there is an assumed message terminator at the end of each message.

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Contents Programming Guide Printing History Safety GuidelinesTable of Contents Internally Triggered Measurements Language DictionaryOutput Commands Example Programs Error MessagesScpi Conformance Information Compatibility LanguageDocumentation Summary About this GuideExternal References Gpib ReferencesScpi References System Requirements VXIplug&play Power Products Instrument DriversDownloading and Installing the Driver Supported ApplicationsGpib Address Accessing Online HelpGpib Capabilities of the DC Source RS-232 Capabilities of the DC SourceRS-232 Flow Control RS-232 Programming ExampleBaud Rate Boldface font RS-232 TroubleshootingIntroduction to Scpi Conventions Used in This GuideMultiple Commands in a Message Types of Scpi CommandsMoving Among Subsystems Including Common CommandsUsing Queries Types of Scpi MessagesMessage Unit Separator Query IndicatorMessage Unit HeadersResponse Data Types Scpi Data FormatsNumerical Data Formats Suffixes and MultipliersUsing Device Clear Scpi Command CompletionPage Enabling the Output Power-on InitializationIntroduction Programming the OutputMaximum Current Output VoltageOutput Current Maximum VoltageOutput Trigger System Model Setting the Voltage or Current Trigger LevelsTriggering Output Changes Scpi Triggering NomenclatureGenerating Triggers Initiating the Output Trigger SystemMaking Measurements Voltage and Current MeasurementsDC Measurements Current Ranges RMS Measurements Agilent 66312A, 66332A OnlyInternally Triggered Measurements Measurement Trigger System ModelSequence Form Alias SEQuence2 ACQuire BUS Generating Measurement Triggers Agilent 66312A, 66332A OnlyTrigger Commands Used to Measure Output Pulses Measuring Output Pulses Agilent 66312A, 66332A Only Current DetectorPulse Measurement Queries Controlling Measurement Samples Varying the Voltage or Current Sampling RateMultiple Measurements Agilent 66312A, 66332A Only Pre-event and Post-event Triggering Pulse Measurement Example Agilent 66312A, 66332A onlyOption Base Programming the Status Registers Power-On ConditionsOperation Status Group Questionable Status Group Standard Event Status GroupStatus Byte Register RQS Bit Determining the Cause of a Service InterruptServicing Operation Status and Questionable Status Events MSS BitRemote Inhibit RI Inhibit/Fault IndicatorMonitoring Both Phases of a Status Transition Discrete Fault Indicator DFIPin Using the Inhibit/Fault Port as a Digital I/OBit Weight DFI Programming ExamplePage Language Dictionary Subsystem CommandsSubsystem Commands Syntax ALC DFISubsystem Commands Syntax Output Programming Parameters Common CommandsCommon Commands Syntax Programming ParametersCALibrateCURRentMEASureLOWRange Calibration CommandsCALibrateCURRent CALibrateCURRentNEGativeCALibrateLEVel CALibratePASSwordCommand Syntax CALibrateSAVE Parameters None Examples CALibrateDATAQuery Syntax CALibrateSTATe? CALibrateSTATeCALibrateVOLTage CALibrateVOLTagePROTectionQuery Syntax Measurement CommandsMEASureARRayCURRent? FETChARRayCURRent? MEASureARRayVOLTage? FETChARRayVOLTage?FETChCURRent? applies to Agilent 66312A, 66332A Only MEASureCURRent? FETChCURRent?MEASureCURRentACDC? FETChCURRentACDC? MEASureCURRentHIGH? FETChCURRentHIGH?MEASureCURRentLOW? FETChCURRentLOW? MEASureCURRentMAXimum? FETChCURRent MAXimum?MEASureCURRentMINimum? FETChCURRentMINimum? FETChVOLTage? applies to Agilent 66312A, 66332A Only MEASureVOLTage? FETChVOLTage?MEASureVOLTageACDC? FETChVOLTageACDC? MEASureVOLTageHIGH? FETChVOLTageHIGH?MEASureVOLTageLOW? FETChVOLTageLOW? MEASureVOLTageMAXimum? FETChVOLTageMAXimum?MEASureVOLTageMINimum? FETChVOLTageMINimum? Returned Parameters NR3 SENSeCURRentRANGeSENSeCURRentDETector Unit a amperes *RST Value MAX high rangeSENSeSWEepTINTerval SENSeFUNCtionSENSeSWEepOFFSetPOINts SENSeSWEepPOINtsReturned Parameters CRD SENSeWINDowHANNing RECTangularOUTPutDFISOURce Output CommandsOUTPut OUTPutDFIOUTPutPROTectionDELay OUTPutPONSTATeOUTPutPROTectionCLEar Query Syntax OUTPputRELayPOLarity? OUTPutRELayOUTPutRELayPOLarity OUTPutRIMODESOURceCURRentPROTectionSTATe Default SuffixSOURceCURRent SOURceCURRentTRIGgerQuery Syntax SOURceDIGitalDATA? SOURceDIGitalDATASOURceDIGitalFUNCtion SOURceVOLTageAgilent 66332A, 6631B, 6632B, 6633B and 6634B Only SOURceVOLTageALCBANDwidth? SOURceVOLTageALCBWIDth?SOURceVOLTageTRIGger SOURceVOLTagePROTectionSTATusOPERationCONDition? Status CommandsSTATusPRESet STATusOPERation?STATusOPERationNTR STATusOPERationPTR STATusOPERationENABleQuery Syntax STATusOPERationENABle? Parameters Preset ValueSTATusQUEStionableENABle STATusQUEStionable?STATusQUEStionableCONDition? STATQUESNTR?STATQUESPTR? Command Syntax *CLS Parameters NoneSTATusQUEStionableNTR STATusQUEStionablePTR CLSOPC Bit Configuration of Standard Event Status Enable RegisterESE ESR?Example PSCSRE PSC onNR1 register binary value Bit Configuration of Status Byte RegisterSTB? WAIDISPlayTEXT System CommandsDISPlay DISPlayMODEParameters none Returned Parameters NR2 SYSTemERRor?SYSTemLANGuage SYSTemVERSion?IDN? SYSTemLOCalSYSTemREMote SYSTemRWLockRST Command Syntax RCL NRf Parameters ExampleOPT? RCLTST? RST SettingsCommand Syntax SAV NRf Parameters Example SAVINITiateCONTinuousSEQuence1 INITiateCONTinuousNAME Trigger CommandsABORt INITiateSEQuence INITiateNAMEAbor Currtrig Init *TRG Volttrig TRIGgerTRIGgerSOURce TRIGgerSEQuence2 TRIGgerACQuireTRIGSEQ2COUNCURR 5 Trigacqcouncurr TRIGgerSEQuence2COUNtCURRent TRIGgerACQuireCOUNtCURRentTRIGgerSEQuence2COUNtVOLTage TRIGgerACQuireCOUNtVOLTage Parameters RST Value ExamplesTRIGSEQ2HYSTCURR TRIGSEQ2LEVVOLT TRIGSEQ2HYSTVOLT TRIGSEQ2LEVCURRTRIGSEQ2LEVCURR TRIGSEQ2HYSTVOLT TRIGgerSEQuence2LEVelCURRent TRIGgerACQuireLEVelCURRentTRIGgerSEQuence2LEVelVOLTage TRIGgerACQuireLEVelVOLTage TRIGSEQ2LEVVOLT TRIGSEQ2HYSTCURRTRIGgerSEQuence2SLOPeCURRent TRIGgerACQuireSLOPeCURRent TRIGgerSEQuence2SLOPeVOLTage TRIGgerACQuireSLOPeVOLTageTRIGSEQ2SLOPVOLT TRG Parameters None Related CommandsTRIGgerSEQuence2SOURce TRIGgerACQuireSOURce TRIGgerSEQuence1DEFine TRIGgerSEQuence2DEFinePage Scpi Confirmed Commands Non-SCPI CommandsScpi Version Page Command Setting Table B-1. COMPatibility Power-on Settings CommandASTS? CLR Table B-2. COMPatibility Commands CompatibilityERR? FAULT? ID? IOUT? Similar Scpi CommandTable B-2. COMPatibility Commands Description Similar Scpi Compatibility CommandError Table B-2. COMPatibility CommandsCompatibility Description Command These commands determine the conditions that will set bitsNorm Fast INH ERR UNR +CC RQS ERR RDYFAU Page Bit Set Error Number Error Code Error Type Error Number ListTable C-1. Error Numbers Error Number Page National Instruments Gpib Driver Assigning the Gpib Address in ProgramsTypes of DOS Drivers Agilent 82335A DriverBasic Controllers Error HandlingExample Programs D Call IBCLRPS% Example 2. IBM Controller Using National InterfaceCODES$=*CLS Option Base Example 3. Controller Using BasicIndex 100 IndexScpi 101102 Manual Updates
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