Agilent Technologies 66312A Operating instructions

Programming Guide

Dynamic Measurement DC Source

Agilent Models 66312A, 66332A

System DC Power Supply

Agilent Models 6631B, 6632B, 6633B, 6634B

6611C, 6612C, 6613C, 6614C

Agilent Part No. 5962-8198 Printed in U.S.A.

Microfiche No 5962-8199 January, 2000

Safety Guidelines

The beginning of the Operating Guide has a Safety Summary page. Be sure you are familiar with the

information on this page before programming the dc source for operation from a controller.

Printing History

The edition and current revision of this manual are indicated below. Reprints of this guide containing minor

corrections and updates may have the same printing date. Revised editions are identified by a new

printing date. A revised edition incorporates all new or corrected material since the previous printing date.

Changes to the manual occurring between revisions are covered by change sheets shipped with the

guide.

This document contains proprietary information protected by copyright. All rights are reserved. No part of

this document may be photocopied, reproduced, or translated into another language without the prior

consent of Agilent Technologies. The information contained in this document is subject to change without

notice.

Update 1 December, 1998

Update 2 January, 2000

Table of Contents

Safety Guidelines 2

Printing History 2

Table of Contents 3

1 - GENERAL INFORMATION 7

About this Guide 7

Documentation Summary 7

External References 8

GPIB References 8

SCPI References 8

2 - INTRODUCTION TO PROGRAMMING 9

VXIplug&play Power Products Instrument Drivers 9

Supported Applications 9

System Requirements 9

Downloading and Installing the Driver 9

Accessing Online Help 10

GPIB Capabilities of the DC Source 10

GPIB Address 10

RS-232 Capabilities of the DC Source 10

RS-232 Data Format 10

RS-232 Flow Control 11

RS-232 Programming Example 11

RS-232 Troubleshooting 12

Introduction to SCPI 12

Conventions Used in This Guide 12

Types of SCPI Commands 13

Multiple Commands in a Message 13

Moving Among Subsystems 14

Including Common Commands 14

Using Queries 14

Types of SCPI Messages 14

The Message Unit 15

Headers 15

Query Indicator 15

Message Unit Separator 15

Root Specifier 15

Message Terminator 15

SCPI Data Formats 16

Numerical Data Formats 16

Suffixes and Multipliers 16

Response Data Types 16

SCPI Command Completion 17

Using Device Clear 17

3 - PROGRAMMING THE DC SOURCE 19

Introduction 19

Programming the Output 19

Power-on Initialization 19

Enabling the Output 19

Output Voltage 20

Output Current 20

Triggering Output Changes 21

SCPI Triggering Nomenclature 21

Output Trigger System Model 21

Setting the Voltage or Current Trigger Levels 21

Initiating the Output Trigger System 22

Generating Triggers 22

Making Measurements 23

Voltage and Current Measurements 23

Internally Triggered Measurements 25

SCPI Triggering Nomenclature 25

Measurement Trigger System Model 25

Initiating the Measurement Trigger System (Agilent 66312A, 66332A Only) 25

Selecting the Measurement Trigger Source (Agilent 66312A, 66332A Only) 26

Generating Measurement Triggers (Agilent 66312A, 66332A Only) 26

Measuring Output Pulses (Agilent 66312A, 66332A Only) 28

Current Detector 28

Pulse Measurement Queries 28

Controlling Measurement Samples 29

Varying the Voltage or Current Sampling Rate 29

Multiple Measurements (Agilent 66312A, 66332A Only) 29

Pre-event and Post-event Triggering (Agilent 66312A, 66332A Only) 30

Pulse Measurement Example (Agilent 66312A, 66332A only) 30

Programming the Status Registers 32

Power-On Conditions 32

Operation Status Group 33

Questionable Status Group 34

Standard Event Status Group 34

Status Byte Register 34

Determining the Cause of a Service Interrupt 35

Servicing Operation Status and Questionable Status Events 35

Monitoring Both Phases of a Status Transition 36

Inhibit/Fault Indicator 36

Remote Inhibit (RI) 36

Discrete Fault Indicator (DFI) 36

Using the Inhibit/Fault Port as a Digital I/O 37

DFI Programming Example 37

4 - LANGUAGE DICTIONARY 39

Introduction 39

Subsystem Commands 39

Common Commands 43

Programming Parameters 43

Calibration Commands 44

CALibrate:CURRent 44

CALibrate:CURRent:NEGative 44

CALibrate:CURRent:MEASure:LOWRange 44

CALibrate:CURRent:MEASure:AC 44

CALibrate:DATA 45

CALibrate:LEVel 45

CALibrate:PASSword 45

CALibrate:SAVE 45

CALibrate:STATe 46

CALibrate:VOLTage 46

CALibrate:VOLTage:PROTection 46

Measurement Commands 47

MEASure:ARRay:CURRent? FETCh:ARRay:CURRent? 47

MEASure:ARRay:VOLTage? FETCh:ARRay:VOLTage? 47

MEASure:CURRent? FETCh:CURRent? 48

MEASure:CURRent:ACDC? FETCh:CURRent:ACDC? 48

MEASure:CURRent:HIGH? FETCh:CURRent:HIGH? 48

MEASure:CURRent:LOW? FETCh:CURRent:LOW? 49

MEASure:CURRent:MAXimum? FETCh:CURRent: MAXimum? 49

MEASure:CURRent:MINimum? FETCh:CURRent:MINimum? 49

MEASure:VOLTage? FETCh:VOLTage? 50

MEASure:VOLTage:ACDC? FETCh:VOLTage:ACDC? 50

MEASure:VOLTage:HIGH? FETCh:VOLTage:HIGH? 50

MEASure:VOLTage:LOW? FETCh:VOLTage:LOW? 51

MEASure:VOLTage:MAXimum? FETCh:VOLTage:MAXimum? 51

MEASure:VOLTage:MINimum? FETCh:VOLTage:MINimum? 51

SENSe:CURRent:RANGe 52

SENSe:CURRent:DETector 52

SENSe:FUNCtion 53

SENSe:SWEep:OFFSet:POINts 53

SENSe:SWEep:POINts 53

SENSe:SWEep:TINTerval 53

SENSe:WINDow 54

Output Commands 55

OUTPut 55

OUTPut:DFI 55

OUTPut:DFI:SOURce 55

OUTPut:PON:STATe 56

OUTPut:PROTection:CLEar 56

OUTPut:PROTection:DELay 56

OUTPut:RELay 57

OUTPut:RELay:POLarity 57

OUTPut:RI:MODE 57

[SOURce:]CURRent 58

[SOURce:]CURRent:TRIGger 58

[SOURce:]CURRent:PROTection:STATe 58

[SOURce:]DIGital:DATA 59

[SOURce:]DIGital:FUNCtion 59

[SOURce:]VOLTage:ALC:BANDwidth? [SOURce:]VOLTage:ALC:BWIDth? 60

[SOURce:]VOLTage:TRIGger 60

[SOURce:]VOLTage:PROTection 60

Status Commands 61

STATus:PRESet 61

STATus:OPERation? 61

STATus:OPERation:CONDition? 61

STATus:OPERation:ENABle 62

STATus:OPERation:NTR STATus:OPERation:PTR 62

STATus:QUEStionable? 63

STATus:QUEStionable:CONDition? 63

STATus:QUEStionable:ENABle 63

STATus:QUEStionable:NTR STATus:QUEStionable:PTR 64

*CLS 64

*ESE 65

*ESR? 65

*OPC 65

*PSC 66

*SRE 66

*STB? 67

*WAI 67

System Commands 68

DISPlay 68

DISPlay:MODE 68

DISPlay:TEXT 68

SYSTem:ERRor? 69

SYSTem:LANGuage 69

SYSTem:VERSion? 69

SYSTem:LOCal 70

SYSTem:REMote 70

SYSTem:RWLock 70

*IDN? 70

*OPT? 71

*RCL 71

*RST 71

*SAV 72

*TST? 72

Trigger Commands 73

ABORt 73

INITiate:SEQuence INITiate:NAME 73

INITiate:CONTinuous:SEQuence1 INITiate:CONTinuous:NAME 73

TRIGger 74

TRIGger:SOURce 74

TRIGger:SEQuence2 TRIGger:ACQuire 74

TRIGger:SEQuence2:COUNt:CURRent TRIGger:ACQuire:COUNt:CURRent 75

TRIGger:SEQuence2:COUNt:VOLTage TRIGger:ACQuire:COUNt:VOLTage 75

TRIGger:SEQuence2:HYSTeresis:CURRent TRIGger:ACQuire:HYSTeresis:CURRent 76

TRIGger:SEQuence2:HYSTeresis:VOLTage TRIGger:ACQuire:HYSTeresis:VOLTage 76

TRIGger:SEQuence2:LEVel:CURRent TRIGger:ACQuire:LEVel:CURRent 77

TRIGger:SEQuence2:LEVel:VOLTage TRIGger:ACQuire:LEVel:VOLTage 77

TRIGger:SEQuence2:SLOPe:CURRent TRIGger:ACQuire:SLOPe:CURRent 78

TRIGger:SEQuence2:SLOPe:VOLTage TRIGger:ACQuire:SLOPe:VOLTage 78

TRIGger:SEQuence2:SOURce TRIGger:ACQuire:SOURce 79

TRIGger:SEQuence1:DEFine TRIGger:SEQuence2:DEFine 79

*TRG 79

A - SCPI CONFORMANCE INFORMATION 81

SCPI Version 81

SCPI Confirmed Commands 81

Non-SCPI Commands 81

B - COMPATIBILITY LANGUAGE 83

Introduction 83

C - ERROR MESSAGES 89

Error Number List 89

D - EXAMPLE PROGRAMS 93

Introduction 93

Assigning the GPIB Address in Programs 93

Types of DOS Drivers 93

Error Handling 94

BASIC Controllers 94

Example 1. HP Vectra PC Controller Using Agilent 82335 Interface 94

Example 2. IBM Controller Using National Interface 96

Example 3. Controller Using BASIC 98

INDEX 99

General Information

About this Guide

This guide provides remote programming information for the following series of GPIB programmable dc

power supplies:

• Agilent 66312A

• Agilent 66332A

• Agilent 6631B/6632B/6633B/6634B

• Agilent 6611C/6612C/6613C/6614C

You will find the following information in the rest of this guide:

Chapter 1 Introduction to this guide.

Chapter 2 Introduction to SCPI messages structure, syntax, and data formats. Examples of SCPI

programs

Chapter 3 Introducton to Programming the dc source with SCPI commands.

Chapter 4 Dictionary of SCPI commands.

Appendix A SCPI conformance information.

Appendix B Use of the alternate Comptibility programming language.

Appendix C Error messages

Documentation Summary

The following documents that are related to this Programming Guide have additional helpful information

for using the dc source.

♦ User’s Guide for Agilent 66312A and Agilent 6611C/6612C/6613C/3314C. Includes specifications

and supplemental characteristics, how to use the front panel, how to connect to the instrument,

and calibration procedures.

♦ User’s Guide for Agilent 66332A and Agilent 6631B/6632B/6633B/6634B. Includes specifications

and supplemental characteristics, how to use the front panel, how to connect to the instrument,

and calibration procedures.

1 - General Information

External References

GPIB References

The most important GPIB documents are your controller programming manuals - BASIC, GPIB Command

Library for MS DOS, etc. Refer to these for all non-SCPI commands (for example: Local Lockout).

The following are two formal documents concerning the GPIB interface:

♦

ANSI/IEEE Std. 488.1-1987 IEEE Standard Digital Interface for Programmable Instrumentation

Defines the technical details of the GPIB interface. While much of the information is beyond the

need of most programmers, it can serve to clarify terms used in this guide and in related

documents.

♦

ANSI/IEEE Std. 488.2-1987 IEEE Standard Codes, Formats, Protocols, and Common

Commands

. Recommended as a reference only if you intend to do fairly sophisticated

programming. Helpful for finding precise definitions of certain types of SCPI message formats,

data types, or common commands.

The above two documents are available from the IEEE (Institute of Electrical and Electronics Engineers),

345 East 47th Street, New York, NY 10017, USA. The WEB address is www.ieee.org.

SCPI References

The following documents will assist you with programming in SCPI:

♦

Standard Commands for Programmable Instruments Volume 1, Syntax and Style

♦

Standard Commands for Programmable Instruments Volume 2, Command References

♦

Standard Commands for Programmable Instruments Volume 3, Data Interchange Format

♦

Standard Commands for Programmable Instruments Volume 4, Instrument Classes

To obtain a copy of the above documents, contact: Fred Bode, Executive Director, SCPI Consortium,

8380 Hercules Drive, Suite P3, Ls Mesa, CA 91942, USA

Introduction to Programming

VXI

plug&play

Power Products

Instrument Drivers

VXI

plug&play

instrument drivers for Microsoft Windows 95 and Windows NT are now available on the

Web at http://www.agilent.com/find/drivers. These instrument drivers provide a high-level programming

interface to your Agilent Technologies instrument. VXI

plug&play

instrument drivers are an alternative to

programming your instrument with SCPI command strings. Because the instrument driver’s function

calls work together on top of the VISA I/O library, a single instrument driver can be used with multiple

application environments.

Supported Applications

ñAgilent VEE

ñMicrosoft Visual BASIC

ñMicrosoft Visual C/C++

ñBorland C/C++

ñNational Instruments LabVIEW

ñNational Instruments LabWindows/CVI

System Requirements

The VXI

plug&play

Power Products instrument driver complies with the following:

ñMicrosoft Windows 95

ñMicrosoft Windows NT 4.0

ñHP VISA revision F.01.02

ñNational Instruments VISA 1.1

Downloading and Installing the Driver

NOTE: Before installing the VXIplug&play instrument driver, make sure that you have one of the

supported applications installed and running on your computer.

1.Access Agilent Technologies’ Web site at http://www.agilent.com/find/drivers.

2. Select the instrument for which you need the driver.

3. Click on the driver, either Windows 95 or Windows NT, and download the executable file to your

pc.

4.Locate the file that you downloaded from the Web. From the Start menu select Run

<path>:\agxxxx.exe - where <path> is the directory path where the file is located, and agxxxx is

the instrument driver that you downloaded .

5.Follow the directions on the screen to install the software. The default installation selections will

work in most cases. The readme.txt file contains product updates or corrections that are not

documented in the on-line help. If you decide to install this file, use any text editor to open and

read it.

2 - Introduction to Programming

6.To use the VXI

plug&play

instrument driver, follow the directions in the VXI

plug&play

online help

under “Introduction to Programming”.

Accessing Online Help

A comprehensive online programming reference is provided with the driver. It describes how to get

started using the instrument driver with Agilent VEE, LabVIEW, and LabWindows. It includes complete

descriptions of all function calls as well as example programs in C/C++ and Visual BASIC.

ñTo access the online help when you have chosen the default Vxipnp start folder, click on the Start

button and select Programs | Vxipnp | Agxxxx Help (32-bit).

- where agxxxx is the instrument driver.

GPIB Capabilities of the DC Source

All dc source functions except for setting the GPIB address are programmable over the GPIB. The IEEE

488.2 capabilities of the dc source are listed in the Specifications Table of the User's Guide.

GPIB Address

The dc source operates from an GPIB address that is set from the front panel. To set the GPIB address,

press the Addresskey on the front panel and enter the address using the Entry keys. The GPIB address

is stored in non-volatile memory.

RS-232 Capabilities of the DC Source

The dc source provides an RS-232 programming interface, which is activated by commands located under

the front panel Addresskey. All SCPI and COMPatibility commands are available through RS-232

programming. When the RS-232 interface is selected, the GPIB interface is disabled.

The EIA RS-232 Standard defines the interconnections between Data Terminal Equipment (DTE) and

Data Communications Equipment (DCE). The dc source is designed to be a DTE. It can be connected to

another DTE such as a PC COM port through a null modem cable.

NOTE: The RS-232 settings in your program must match the settings specified in the front panel

Address menu. Press the front panel Address key if you need to change the settings.

RS-232 Data Format

The RS-232 data is a 10-bit word with one start bit and one stop bit. The number of start and stop bits is

not programmable. However, the following parity options are selectable using the front panel Address key:

EVEN Seven data bits with even parity

ODD Seven data bits with odd parity

MARK Seven data bits with mark parity (parity is always true)

SPACE Seven data bits with space parity (parity is always false)

NONE Eight data bits without parity

Parity options are stored in non-volatile memory.

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