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Agilent Technologies E3631A User Manual

Agilent Technologies E3631A
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Chapter 4 Remote Interface Reference
The SCPI Status Registers
93
4
The Questionable Status Register
The Questionable Status register provides information about unexpected operation of
the power supply. Bit 4 reports a fault with the fan, and bit 13 summarizes questionable
outputs for any of the three supplies. For example if one of the three supplies is in
constant voltage mode and due to an overload loses regulation, bit 13 is set (latched).
Send the command STAT:QUES? to read the register. To make use of bit 13 you must
first enable registers you wish to summarize with bit 13. Send
STAT:QUES:INST:ENAB 14 to enable the Questionable Instrument register. Then
send STAT:QUES:INST:ISUM<n>:ENAB 3 for each supply to enable the
Questionable Instrument Summary register, where n is 1, 2, or 3.
Table 4-2. Bit Definitions - Questionable Status Register
The Questionable Instrument Status Register
The Questionable Instrument register provides information about unexpected
operations for each of the three supplies. For example if the +6V supply is in the
constant voltage mode and loses regulation, then bit 1 set indicating a possible
overload in the +6V supply. The +25V supply is reported as bit 2, and the -25V supply
as bit 3. Send the command STAT QUES:INST? to read the register. The
STAT:QUES:INST:ISUM<n> registers must be enabled to make use of the
Questionable Instrument register. Send STAT:QUES:INST:ISUM<n>:ENAB 3
to enable output n.
The Questionable Instrument Summary Register
There are three Questionable Instrument Summary registers, one for each supply
output. These registers provide information about voltage and current regulation. Bit
0 is set when the voltage becomes unregulated, and bit 1 is set if the current becomes
unregulated. For example if a supply which is operating as a voltage source (constant
voltage mode) momentarily goes to constant current mode, bit 0 is set to indicate that
the voltage output is not regulated. To read the register for each supply, send
STAT:QUES:INST:ISUM<n>?, where n is 1, 2, or 3.
Bit
Decimal
Value
Definition
0-3 Not used 0 Always set to 0.
4 FAN 16 The fan has a fault condition.
5-12 Not Used 0 Always set to 0.
13 ISUM 8192 Summary of QUES:INST and QUES:INST:ISUM registers.
14-15 Not Used 0 Always set to 0.

Table of Contents

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Agilent Technologies E3631A Specifications

General IconGeneral
BrandAgilent Technologies
ModelE3631A
CategoryPower Supply
LanguageEnglish

Summary

The Front Panel at a Glance

Front-Panel Voltage and Current Limit Settings

Display Annunciators

The Rear Panel at a Glance

Environmental Conditions

Declaration of Conformity

Chapter 1 General Information

Safety Considerations

Covers safety and EMC requirements for the instrument.

Options and Accessories

Lists available options and accessories for the power supply.

Description of Agilent E3631A

Provides a detailed overview of the power supply's features and functionality.

Installation and Setup

Details initial inspection, cooling, location, and rack mounting procedures.

Input Power Requirements

Explains AC input voltage selection and power-line cord requirements.

Chapter 2 Initial Operation

Preliminary Checkout

Steps to verify the power supply is ready for use before initial operation.

Power-On and Output Checkout

Procedures for checking power-on self-test and basic output functions.

Chapter 3 Front-Panel Operation

Front-Panel Operation Overview

Introduces front-panel keys and modes for operating the power supply.

Output Operation Modes

Details constant voltage, constant current, and tracking output operations.

Storing and Recalling Operating States

Explains how to save and retrieve instrument configurations.

Output Control and System Operations

Covers disabling outputs, knob locking, self-tests, error conditions, and display control.

Remote Interface Configuration

Guides on selecting interfaces, setting GPIB addresses, and RS-232 parameters.

GPIB and RS-232 Interface Configuration

Details GPIB setup, RS-232 setup, connection, and troubleshooting.

Calibration Overview

Provides an overview of calibration security, code changes, count, and message features.

Chapter 4 Remote Interface Reference

SCPI Command Summary

Summarizes available SCPI commands for programming the power supply.

Simplified Programming Overview

Introduces basic programming methods using APPLy, low-level commands, output control, and triggering.

Output Setting and Operation Commands

Details commands for selecting, setting, and operating outputs.

Triggering Commands

Explains how to select trigger sources and manage triggering operations.

System-Related Commands

Covers commands for display control, beeper, errors, version, and reset.

Calibration Commands

Details SCPI commands for managing calibration security, current, voltage, and string data.

RS-232 Interface Commands

Lists commands specific to RS-232 communication with the power supply.

The SCPI Status Registers

Details event, enable, summary, questionable, standard, and byte registers and their usage.

Status Reporting Commands

Covers commands for querying system errors and status registers.

An Introduction to the SCPI Language

Explains SCPI language basics, command format, separators, and parameter types.

Interface Management and Conformance

Covers halting outputs, SCPI conformance, and IEEE-488 conformance.

Device Specific Commands

Lists commands specific to the Agilent E3631A, not in the SCPI standard.

Chapter 5 Error Messages

Execution Errors

Lists and explains execution errors related to command syntax and parameters.

Self-Test and Calibration Errors

Details error codes for self-tests and calibration failures.

Chapter 6 Application Programs

Programming Examples Overview

Introduces example programs in BASIC and C/QuickBASIC for GPIB and RS-232.

Using APPLy and Low-Level Commands

Demonstrates setting outputs and using commands via APPLy and low-level SCPI.

Using Status Registers and RS-232 Operation

Shows using status registers for interrupts and RS-232 communication examples.

Chapter 7 Tutorial

Overview of Agilent E3631A Operation

Explains the basic design and operation of series regulated power supplies.

Output Characteristics and Load Considerations

Describes output modes, unregulated states, unwanted signals, and load connection factors.

Extending the Voltage and Remote Programming

Covers series connections for higher voltage and factors affecting remote programming speed.

Reliability and Cooling

Discusses component reliability, internal heat, and cooling requirements for the power supply.

Chapter 8 Specifications

Performance Specifications

Lists warranted performance parameters like output ratings, accuracy, and ripple.

Supplemental Characteristics

Details non-warranted characteristics such as temperature, stability, speed, dimensions, and cooling.

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