Rst *Idn? *Sre | Agilent Technologies 66lxxA manual

Types of SCPI Messages

There are two types of SCPI messages, program and response.

∙A program message consists of one or more properly formatted SCPI commands sent from the controller to the power module. The message, which may be sent at any time, requests the power module to perform some action.

∙A response message consists of data in a specific SCPI format sent from the power module to the controller. The power module sends the message only when commanded by a special program message called a "query."

Types of SCPI Commands

SCPI has two types of commands, common and subsystem. Common commands generally are not related to specific operation but to controlling overall power module functions, such as reset, status, and synchronization. All common commands consist of a three-letter mnemonic preceded by an asterisk:

RST IDN? *SRE 8

Subsystem commands perform specific power module functions. They are organized into an inverted tree structure with the "root" at the top (see Figure 3-2). Some are single commands while others are grouped within specific subsystems.

Note	If you have the optional Agilent 66001A MPS Keyboard, you may want to use it as a quick introduction
	to message structure. See "Appendix A".

Structure of a SCPI Message

SCPI messages consist of one or more message units ending in a message terminator. The terminator is not part of the syntax, but implicit in the way your programming language indicates the end of a line (such as a newline or end-of-line character).

The Message Unit

The simplest SCPI command is a single message unit consisting of a command header (or keyword) followed by a message terminator.

ABOR<newline>

VOLT?<newline>

The message unit may include a parameter after the header. The parameter usually is numeric, but it can be a string:

VOLT 20<newline>

VOLT MAX<newline>

Combining Message Units

The following command message is briefly described here, with details in subsequent paragraphs.

10 Introduction To Programming

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Agilent Technologies 66lxxA manual Rst *Idn? *Sre

Contents

Agilent Part No Microfiche Part No Update April Programming Guide Safety Guidelines Contents Abor Status Reporting Synchronizing Power Module Output Changes Error Messages Documentation Summary IntroductionAbout This Guide External References Accessing Online Help VXIplug&play Power Products Instrument DriversDownloading and Installing the Driver Supported Applications Module Gpib Address Gpib Capabilities Of The Power ModuleIntroduction To Programming Introduction To Scpi RST *IDN? *SRE Volt LEV Prot Curr Voltlev 8.0 Prot 8.8 CURR? Outpprotdel Traversing the Command Tree Effect of Optional Headers Voltagelevel 7PROTECTION 8CURRENTLEVEL 3MODE List Outputprotectionclear STATUSOPERATIONCONDITION?OUTPUTPROTECTIONCLEARSTATUSOPERATIONCONDITION? Volttrig 7.5INIT*TRG Outp OFF*RCL 2OUTP on Listening Formats SymbolNumerical Data Formats Talking Formats Suffixes and Multipliers Class Unit Unit with Multiplier System Considerations Assign @PM3TO Error Handling Agilent Basic Controllers Using the National Instruments Gpib Interface Sending the Command Volt 5 in Basic Sending the Command Volt 5 in C Receiving Data from the Module Receiving Module Data with Basic Receiving Module Data with C Language Dictionary Introduction Meaning and Type Description Of Common CommandsCLS Description ESE Bit Configuration of Standard Event Status Enable RegisterESE ESR? OPC IDN?OPC? OPT? PSC RCL RCLRST SRE SAVSRE STB? Bit Configuration of Status Byte RegisterTRG WAI Description of Subsystem CommandsTST? Abor Subsystem Tree Diagram Calibration Subsystem Calauto Calcurrlev Calauto 1 Calauto OnceCalcurr Calpass Calvolt CalsaveCalstat Calvoltlev Curr 500 MA Currlev CalvoltprotCurr Currmode Currtrig CurrprotstatCurrprotstat OFF Currtrig 1200 MA Currlevtrig Listcoun Listcoun INF Init Initcont 1 Initcont onListcoun Listcurr LISTDWELPOIN? LISTCURRPOIN?Listdwel Liststep LISTVOLTPOIN? ListvoltListvolt 2.0,2.5,3.0 Listvolt MAX,2.5,MIN MEASCURR? MEASVOLT? Outp Outpstat ON,NORELAY Outpprot Outprelpol Outpprotcle Outpprotdel 75E-1Outprel Norm Outpttltlink OutpttltOutpttlt 1 Outpttlt OFF Outpttltsour Link STATOPERCOND? STATOPER?STATOPEREVEN? Statoperenab Stat Oper NTR 32 Stat Oper PTR Statpres STATQUESCOND? STATQUES?STATQUESEVEN? Stat Ques COND? Trigger Subsystem SYSTERR?SYSTVERS? Trig Trigdel .25 Trigdel MAX Trig Trig IMMTrigdel Triglink Voltmode VoltVoltlev Voltmode List Voltmode FIX Volttrig VOLTSENSSOUR?Volttrig 1200 MV Voltlevtrig Power Module Programming Parameters Link Parameter List Status Reporting Power Module Status StructureStatus Register Bit Configuration Operation Status Group Status Questionable Commands Query Bit Signal Bit Configurations of Status Registers MeaningQuestionable Status Group Power Module Status Model Standard Event Status Group Output Queue Status Byte RegisterLocation Of Event Handles Initial Conditions At Power On Examples STATOPEREVEN?QUESEVEN? Statoperptr 5376ENABStatquesptr 18ENAB Statoperptr 1024NTR Statoperenab 1024*SRE Trigger Subsystem Synchronizing Power Module Output ChangesModel of Fixed-Mode Trigger Operation Idle State Delaying StateInitiated State Trigger Status and Event Signals Model of List Mode Trigger OperationINITiateCONTinuous Command Output Change State Outpttltsour List Subsystem Listcurr 2,3,12,15 Listvolt 3.0,3.25,3.5,3.75 Listdwel 10,10,25,40Automatically Repeating a List Triggering a List Timing diagrams of Liststep Operation Scpi Command Completion DFI Discrete Fault Indicator SubsystemRI Remote Inhibit Subsystem System Error Messages Error MessagesPower Module Hardware Error Messages Standard Event Status Register Error Bits 222 -223 -241 -310 -330 -350 -400 -410 -420 -430 Scpi Conformance Information Scpi Confirmed CommandsScpi Approved Commands Scpi Version Non-SCPI Commands Application Programs Application 1. Sequencing Multiple Modules During Power Up Figure B1-1. Block Diagram of Application #1 Variations On This Implementation Figure B1-2. Timing Diagram of Application #1 Enable Output Reset and Clear ModuleEnable Backplane TTL Trigger Drive Enable Response to Trigger Implementation Details How The MPS Implements The Solution MPS Set Up Figure B2-1. Block Diagram of Application #2 Enable Response to TTL Trigger When a CV-TO-CC Transition OccursEnable TTL Trigger Drive Start AT 15 Application 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 Stop Voltage for Ramp Option BaseStart Voltage for Ramp Seconds Application 4. Providing Time-Varying Voltages Figure B4-1. Voltage Waveform for Application #4 Module set up Variations On This Implementation Enable Detection of OC Condition Enable OCPNo Delay Before Protection Occurs Enables Detection on Positive TRANSITION, I.E Application 5. Providing Time-Varying Current Limiting Figure B5-1. Typical DUT Current vs. Time Implementation Details How The MPS Implements The Sequence Dwell Time Data GO to 12 V When TriggeredCurrent Limit Data SET to GET Current from List Application 6. Output Sequencing Paced by the Computer Nominal 12 MPS Set Up Figure B6-1. Block Diagram of Application #6 To be Tested These are the BiasSupply Limit Conditions Number of Bias Supply Limit C0MBINATIONS Return Overview Of Application Advantages/Benefits Of The MPS Solution Figure B7-1. Block Diagram of Application #7 Enable SRQ Interrupt When the Module Indicates SIC Step CompletedWhen IT Completes the LIST. OPC Generates SRO Enable Intr Identify Handler Subroutine Supplemental Information ‘ Conversion to Send Real Numbers Over the BUS CMD$ = Output on ‘ Enable OutputCMD$ = Initiate ‘ Enable Trigger to Start List CMD$ = Voltmode List ‘ SET to GET Voltage from List CONDITION.DATA = Call Iooutputs SLOTO, CMDS, LWaiting for Trigger BIT 5 of the Operation Status Register Wend ‘ Program N3.BAS ‘ Disable Auto Serial PollIf IBSTA% 0 then Goto ‘ AS Part of the Command String ‘ INSTRUMENT.NAME$ = Sloto If IBSTA% 0 then Goto Selected AS a Trigger Source ‘ General Error HandlerStop Application #3 Controlling Voltage Ramp UP AT Turn on Dwell = ramptime To 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 Index Index Index Index Agilent Sales and Support Offices United States Latin America Manual Updates