Agilent Technologies 664xA Adding More Operation Events, Servicing Questionable Status Events

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Table 4-5. Generating RQS from the CC Event

Register

Command

Comment

Operation PTR

STAT:OPER:PTR 1024

Allows a positive transition at the CC input (bit 10) to be

 

 

latched into the Status Event register.1

Operation Enable

STAT:OPER:ENAB 1024

Allows the latched CC event to be summed into the OPER

 

 

summary bit.

Service Request Enable

*SRE 128

Enables the OPER summary bit from the Status Byte register to

 

 

generate RQS.

Operation Condition

STAT:OPER:EVEN?

When you service the request, read the event register to

 

 

determine that bit 10 (CC) is set and to clear the register for the

 

 

next event.

1All bits of the PTR registers bits are set to 1 at power on or in response to STAT:PRES.

Adding More Operation Events

To add the CV (constant voltage) event to this example, it is only necessary to add the decimal values for bit 8 (value 64) to the programming commands of the Operation Status group. The commands to do this are:

STAT:OPER:PTR 1280;ENAB 1280

It is not necessary to change any other registers, since the programming for the operation summary bit (OPER) path has already been done.

Servicing Questionable Status Events

To add OC (overcurrent) and OT (overtemperature) events to this example, program Questionable Status group bits 1 and 4.

STAT:QUES:PTR 18;ENAB 18

Next, you must program the Service Request Enable register to recognize both the questionable (QUES) and the operational (OPER) summary bits.

*SRE 136

Now when there is a service request, read back both the operational and the questionable event registers.

STAT:OPER:EVEN?;QUES:EVEN?

Monitoring Both Phases of a Status Transition

You can monitor a status signal for both its positive and negative transitions. For example, to generate RQS when the power supply either enters the CC (constant current) condition or leaves that condition, program the Operational Status PTR/NTR filter as follows:

STAT:OPER:PTR 1024;NTR 1024

STAT:OPER:ENAB 1024;*SRE 128

The PTR filter will cause the OPER summary bit to set RQS when CC occurs. When the controller subsequently reads the event register (STAT: OPER: EVEN?), the register is cleared. When CC subsequently goes false, the NTR filter causes the OPER summary bit to again set RQS.

56 Status Reporting

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Contents Programming Guide Gpib DC Power Supplies Agilent Part No Microfiche Part No JulySafety Guidelines Printing HistoryContents Description of Subsystem Commands System CommandsCurrent Subsystem Display SubsystemCommand Summary Programming Parameters Power Supply Status Structure Operation Status GroupVoltage Subsystem Questionable Status GroupPage General Information About this GuideDocumentation Summary User’s GuidePrerequisites for Using this Guide VXIplug&play Power Product Instrument DriversDownloading and Installing the Driver Accessing Online HelpGpib Capabilities Of The Power Supply Remote ProgrammingIntroduction To Scpi ConventionsTypes of Scpi Commands Scpi MessagesStructure of a Scpi Message Voltlev 4.5PROT 4.8CURR?NLVoltlev 4.5 Prot 4.8 CURR? Parts of a Scpi MessageVolt LEV Prot Curr Traversing the Command Tree Query IndicatorMessage Unit Separator Root SpecifierEffect of Optional Headers Moving Among SubsystemsOutputprotectionclear STATUSOPERATIONCONDITION? OUTPUTPROTECTIONCLEARSTATUSOPERATIONCONDITION?Including Common Commands Scpi QueriesValue Coupling Scpi Data FormatsExamples Controlling the Output Programming Status Saving and Recalling StatesWriting to the Display System Considerations Programming the Digital I/O PortGpib Address DigdataAction Display Shows Assigning the Gpib Address In ProgramsError Handling DOS DriversAgilent Basic Controllers Sample Program CodeProgramming Some Power Supply Functions Iout = OUTPUTS2Call Ioenter PS,OEVENT SPOL%=O While C O Language Dictionary IntroductionDescription Of Common Commands Common Commands Syntax DiagramCLS ESEOPC ESR?IDN? OPC? OPT?PSC PSC 0 *PSCCommand Syntax RCL NRf Parameters Example Query Syntax None Related CommandsRCL PSC *RST *SAVSAV RSTSAV Bit Configuration of Status Byte Register SRESTB? SREWAI TRGTST? Description of Subsystem Commands Calibration CommandsAbor AborCurrprotstat Current SubsystemCurr Currtrig Display Subsystem DigdataDisp Digdata 7 DigitaldatavalueDisptext Defaultmode DispmodeDisptext Dispmode Norm Displaymode Normal Displaywindowmode TextInitiate Subsystem Measure SubsystemInit Initcont MEASCURR? MEASVOLT?Outpprotcle Outpprotdel Output SubsystemOutp Outprel OutprelpolOutprel 1 Outprel OFF Outprelpol NormStatus Subsystem StatpresStatus Operation Registers STATOPER?STATUSOPERATIONENABLE? StatoperenabStatoper NTR Statoper PTR Statoperenab 1312 StatoperenabStatus Questionable Registers STATQUES?STATQUESCOND? StatquesenabSystem Commands SYSTERR? SYSTEMERROR?Statques NTR Statques PTR SYSTERR?Trigger Subsystem SystlangSYSTVERS? TrigVoltage Subsystem TrigsourVolt Volttrig Trigsour BUS Triggersource BUSCommand Summary Command SummaryCommand Parameters Subsystem Commands VoltprotCommand Parameters Common Commands ParametersProgramming Parameters Currlevtrig MAXVoltlevtrig MAX Voltprot MAXPage Power Supply Status Structure Register CommandsStatus Reporting Operation Status GroupCAL WTGUNR OPCStatus Questionable Commands Register Query Cleared By Questionable Status GroupStandard Event Status Group STATQUESNTR?Service Request Enable Register Initial Conditions At Power OnStatus Byte Register Output QueuePON Power-On Bit Servicing an Operation Status Mode EventDefault Power On Register States Condition Caused By StatpreServicing Questionable Status Events Monitoring Both Phases of a Status TransitionAdding More Operation Events Scpi Command Completion DFI Discrete Fault IndicatorRI Remote Inhibit WAIPage Error Messages Power Supply Hardware Error MessagesCalibration Error Messages System Error MessagesSummary of System Error Messages Error Error String Description/Explanation/Examples NumberScpi Confirmed Commands1 Scpi Approved CommandsScpi Conformance Information Scpi VersionNON-SCPI Commands1 Compatibility Language Compatibility LanguageParallel Polling Volt CurrVSET? ISET? CURR? VOUT?Hold OFF VolttrigHold CurrtrigFAULT? UNMASK?SRQ OFF SRQIndex IndexOperation status group, 51 optional header Trig SOUR, 46 VOLT, 46 Volt PROT, 47 Volt Trig United States Latin America Canada Australia/New ZealandEurope Asia Pacific Japan
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