Agilent Technologies 66lxxA manual List Subsystem

Page 60

List Subsystem

The List Subsystem commands allow you to program a sequence of voltage and/or current values that will be applied to the power module output when it is the list mode (VOLTage:MODE LIST or CURRent:MODE LIST). Up to 20 voltage and current values, with 20 associated time intervals (dwells), may be programmed. By using lists, you can program a complex sequence of power module outputs with minimal interaction between the controller and the power module. Lists allow you to time output changes more precisely or to better synchronize them (using triggers) with asynchronous events.

Basic Steps of List Sequencing

You can program the number of output levels (or points) in the list, the time interval that each level is maintained, the number of times that the list will be executed, and how the levels change in response to triggers. This is a synopsis of the list commands:

List Function

Command

Enable the voltage list function

VOLT:MODE LIST

Enable the current list function

CURR:MODE LIST

Specify the voltage output levels (points)

LIST:VOLT <NRf+>

Specify the current output levels (points)

LIST:CURR <NRf+>

Specify the time duration of each output level

LIST:DWEL <NRf+>

Specify the times the list is repeated

LIST:COUN <NRf+>

Select the list response to a trigger

LIST:STEP AUTOONCE

Programming the List Output Levels

1.Enable the specific output to be controlled by the list. For example,

VOLT:MODE LIST CURR:MODE LIST

2.Program the desired output levels or points. The order of the points determines the order in which the output levels will occur. To sequence the voltage through values of 1, 1.5, 3, 1.5, and 1 volts, program:

LIST:VOLT 1,1.5,3.0,1.5,1

You can specify lists for both voltage and current. For example:

LIST:VOLT 1,2,5,6,8 LIST:CURR 10,5,2,1.67,1.25

Both lists must have the same number of points. The exception is if a list has only a single point. In this case, the single- point list is treated as if it has the same number of points as the other list with each point equal to the programmed value. For example, if you send:

LIST:VOLT 1,2,5,6,8;CURR 1

then the power module will respond as if the two lists were:

LIST:VOLT 1,2,5,6,8

LIST:CURR 1,1,1,1,1

Note

Execution of a list will be aborted if an ABORt command or an implied ABORt command (another list

 

command, the *RST command or the *RCL command) is sent.

 

 

Programming List Intervals

The dwell time is the interval that the output remains at the programmed value. The time unit is seconds. The following command specifies five dwell intervals:

LIST:DWEL 1,1.5,3,1.5,.5

Synchronizing Power Module Output Changes 61

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Contents Agilent Part No Microfiche Part No Update April Programming GuideSafety Guidelines Contents Abor Status Reporting Synchronizing Power Module Output Changes Error MessagesIntroduction About This GuideDocumentation Summary External ReferencesVXIplug&play Power Products Instrument Drivers Downloading and Installing the DriverAccessing Online Help Supported ApplicationsGpib Capabilities Of The Power Module Introduction To ProgrammingModule Gpib Address Introduction To ScpiRST *IDN? *SRE Volt LEV Prot Curr Voltlev 8.0 Prot 8.8 CURR?Outpprotdel Traversing the Command Tree Effect of Optional HeadersOutputprotectionclear STATUSOPERATIONCONDITION? OUTPUTPROTECTIONCLEARSTATUSOPERATIONCONDITION?Voltagelevel 7PROTECTION 8CURRENTLEVEL 3MODE List Volttrig 7.5INIT*TRG Outp OFF*RCL 2OUTP onSymbol Numerical Data Formats Talking FormatsListening Formats Suffixes and Multipliers Class Unit Unit with MultiplierSystem Considerations Assign @PM3TOError Handling Agilent Basic ControllersUsing the National Instruments Gpib Interface Sending the Command Volt 5 in Basic Sending the Command Volt 5 in CReceiving Data from the Module Receiving Module Data with BasicReceiving Module Data with C Language Dictionary IntroductionDescription Of Common Commands CLSMeaning and Type DescriptionBit Configuration of Standard Event Status Enable Register ESEESE ESR?IDN? OPCOPC? OPT? PSCRCL RCLRST SAV SRESRE Bit Configuration of Status Byte Register STB?TRG Description of Subsystem Commands TST?WAI AborSubsystem Tree Diagram Calibration Subsystem CalautoCalauto 1 Calauto Once CalcurrCalcurrlev CalpassCalsave CalstatCalvolt CalvoltlevCalvoltprot CurrCurr 500 MA Currlev CurrmodeCurrprotstat Currprotstat OFFCurrtrig Currtrig 1200 MA CurrlevtrigInit Initcont 1 Initcont on ListcounListcoun Listcoun INF ListcurrLISTCURRPOIN? ListdwelLISTDWELPOIN? ListstepListvolt Listvolt 2.0,2.5,3.0 Listvolt MAX,2.5,MINLISTVOLTPOIN? MEASCURR? MEASVOLT?Outp Outpstat ON,NORELAY OutpprotOutpprotcle Outpprotdel 75E-1 OutprelOutprelpol NormOutpttlt Outpttlt 1 Outpttlt OFFOutpttltlink Outpttltsour LinkSTATOPER? STATOPEREVEN?STATOPERCOND? StatoperenabStat Oper NTR 32 Stat Oper PTR StatpresSTATQUES? STATQUESEVEN?STATQUESCOND? Stat Ques COND?SYSTERR? SYSTVERS?Trigger Subsystem TrigTrig Trig IMM TrigdelTrigdel .25 Trigdel MAX TriglinkVolt VoltlevVoltmode Voltmode List Voltmode FIXVOLTSENSSOUR? VolttrigVolttrig 1200 MV Voltlevtrig Power Module Programming Parameters Link Parameter ListPower Module Status Structure Status Register Bit ConfigurationStatus Reporting Operation Status GroupBit Signal Bit Configurations of Status Registers Meaning Status Questionable Commands QueryQuestionable Status Group Power Module Status Model Standard Event Status GroupStatus Byte Register Output QueueLocation Of Event Handles Initial Conditions At Power On ExamplesStatoperptr 5376ENAB Statquesptr 18ENABSTATOPEREVEN?QUESEVEN? Statoperptr 1024NTR Statoperenab 1024*SRESynchronizing Power Module Output Changes Trigger SubsystemModel of Fixed-Mode Trigger Operation Delaying State Idle StateInitiated State Model of List Mode Trigger Operation INITiateCONTinuous CommandTrigger Status and Event Signals Output Change StateOutpttltsour List Subsystem Listvolt 3.0,3.25,3.5,3.75 Listdwel 10,10,25,40 Automatically Repeating a ListListcurr 2,3,12,15 Triggering a ListTiming diagrams of Liststep Operation DFI Discrete Fault Indicator Subsystem Scpi Command CompletionRI Remote Inhibit Subsystem Error Messages Power Module Hardware Error MessagesSystem Error Messages Standard Event Status Register Error Bits222 -223 -241 -310 -330 -350 -400 -410 -420 -430 Scpi Confirmed Commands Scpi Approved CommandsScpi Conformance Information Scpi VersionNon-SCPI Commands Application Programs Application 1. Sequencing Multiple Modules During Power Up Figure B1-1. Block Diagram of Application #1 Variations On This ImplementationFigure B1-2. Timing Diagram of Application #1 Reset and Clear Module Enable Backplane TTL Trigger DriveEnable Output Enable Response to TriggerImplementation Details How The MPS Implements The Solution MPS Set Up Figure B2-1. Block Diagram of Application #2 When a CV-TO-CC Transition Occurs Enable TTL Trigger DriveEnable Response to TTL Trigger Start AT 15Application 3. Controlling Output Voltage Ramp Up at Turn On Figure B3-1. Simulating a Slow Voltage Ramp Generating the Desired Voltage Ramp for Application #3 Option Base Start Voltage for RampStop Voltage for Ramp SecondsApplication 4. Providing Time-Varying Voltages Figure B4-1. Voltage Waveform for Application #4Module set up Variations On This Implementation Enable OCP No Delay Before Protection OccursEnable Detection of OC Condition Enables Detection on Positive TRANSITION, I.EApplication 5. Providing Time-Varying Current Limiting Figure B5-1. Typical DUT Current vs. Time Implementation Details How The MPS Implements The Sequence GO to 12 V When Triggered Current Limit DataDwell Time Data SET to GET Current from ListApplication 6. Output Sequencing Paced by the Computer Nominal 12MPS Set Up Figure B6-1. Block Diagram of Application #6 These are the Bias Supply Limit ConditionsTo be Tested Number of Bias Supply Limit C0MBINATIONSReturn Overview Of Application Advantages/Benefits Of The MPS Solution Figure B7-1. Block Diagram of Application #7 When the Module Indicates SIC Step Completed When IT Completes the LIST. OPC Generates SROEnable SRQ Interrupt Enable Intr Identify Handler SubroutineSupplemental Information CMD$ = Output on ‘ Enable Output CMD$ = Initiate ‘ Enable Trigger to Start List‘ Conversion to Send Real Numbers Over the BUS CMD$ = Voltmode List ‘ SET to GET Voltage from ListCall Iooutputs SLOTO, CMDS, L Waiting for Trigger BIT 5 of the Operation Status RegisterCONDITION.DATA = Wend‘ Disable Auto Serial Poll If IBSTA% 0 then Goto ‘ AS Part of the Command String‘ Program N3.BAS ‘ INSTRUMENT.NAME$ = Sloto‘ General Error Handler If IBSTA% 0 then Goto Selected AS a Trigger SourceStop Application #3 Controlling Voltage Ramp UP AT Turn on Dwell = ramptimeTo terminate the iooutputa Int error Char *badstring If error != EOl enabled for both read and write Strcatvlist, vpoint This is a generalized error checking routine Index IndexIndex Index Index Agilent Sales and Support Offices United States Latin AmericaManual Updates
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