Agilent Technologies 6627A, 6621A, 6622A, 6623A, 6624A manual Asts?, Unmask?, Unmask 2,XXX

Page 71

To query an output channel for its status, you must specify the output channel. For example, to find out the status at output

2 send the following query and address the supply to talk:

STS? 2

Accumulated Status Register. Each output channel of the power supply also maintains a cumulative status in its accumulated status (astatus) register. This register records every status condition the power supply output entered since it was last queried. When queried, it returns a decimal number which is decoded as shown below. The astatus register is reset to the present value of the status register after it is queried. The bits are assigned as in Table 5-5. Here is an example to help you decode the decimal number (from 0 to 255) returned when the astatus register is queried. If the output channel was in overvoltage since the last reading of the astatus register and that channel is presently operating in constant voltage mode, the reading you will get when you query the register will be 9. To decode this we use table 5-5.

9 =

8

+

1

 

OV

+

CV

For example, to query the astatus register of output 2, send the following query and address the supply to talk.

ASTS? 2

The Mask and Fault Register. The fault register works in conjunction with the mask register. These are two eight bit registers which report any fault condition on a particular output channel. The mask register is used to set up the conditions that generate a fault which is latched into the fault register. The user can then read the fault register to determine the fault. When a bit in the fault register is set, the power supply can generate a service request for that output providing the service request command on fault (SRQ 1 or SRQ 3) was previously sent. See page 76 for a discussion on service request.

To understand how these two registers work, we must include the status register in this discussion. Recall that the status register takes its input from the power supply and the user cannot change its contents. The mask register takes its inputs from the user, and the power supply cannot change its contents. The fault register takes its inputs from both the mask and the status registers. You can find out the setting of the mask register of output 2 by sending the following query and addressing the supply to talk:

UNMASK? 2

The response will be a numeric code between 0 and 255 which can be decoded by consulting Table 5-5. You can set the conditions to generate a fault by setting (unmasking) one or more bits in the mask register. The conditions will remain unmasked until you change them. To unmask conditions in output 2 for example, send the following command:

UNMASK 2,XXX

where XXX specifies the numeric code (0 to 255) for the unmasked conditions (see Table 5-5). If during operation, the output experiences any of the previously unmasked conditions, it will set the corresponding bit(s) in its fault register.

Remember that the bits in the fault register can be set when there is a change in either the status register or the mask register. Each output has its status, mask, and fault registers arranged as shown in Figure 5-3 and Table 5-5. The mask register, which is set by the user, is used to specify which bits in the status register are enabled (unmasked) to set bits in the fault register. A bit is set in the fault register when the corresponding bit in the status register changes from "0’’ to "1" and the corresponding bit in the mask register is a "1". Also, if a bit in the status register is already set and then the corresponding bit in the mask register is set (unmasked), the corresponding bit in the fault register will be set.

In addition, if both status and mask register bits remain set after the fault register was read (and cleared), the fault register will remain cleared as long as there are no changes in either the status or mask registers with the following exception. Executing a VSET, ISET, RCL, OVRST, OCRST, or OUT on/off command, will cause the CV, + CC, - CC, or UNR bit (as applicable) in the fault register to be set. Note that the fault register is cleared immediately after it is read.

74 Remote Operation

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Contents Agilent Part No Operating ManualCertification Safety Summary Environmental Conditions Safety SummaryEMC Declaration of ConformityWhat this Manual Contains Table Of Contents Local Operation Remote OperationProgramming With a Series 200/300 Computer Command SummaryError Messages CalibrationInstrument and Manual Identification Safety ConsiderationsGeneral Information IntroductionOutput Combinations Available AccessoriesDescription ModelGP-IB Board Basic OperationOutput Boards Definitions SpecificationsQualifying Conditions Output Response Characteristics Source Effect SpecificationsOutputs Low High Voltage Temperature Coefficient Supplemental CharacteristicsOVP Readback ResolutionLow Voltage General Information General Information General Information General Information Location and Cooling InstallationInitial Inspection Line Fuse Input Power RequirementsLine Fuses GP-IBLine Voltage Conversion Power CordGP-IB Interface Connector Turning On Your Supply Front Panel Controls and IndicatorsGetting Started 15V 35A Output Controls and Indicators Number Controls/lndicators Normal Self Test Indications Test Pattern of all Display Segments at Power-onSample Self-Test Failure Display Checking Out Your Supply Using Local ControlCurrent Test Voltage TestOvervoltage Test RST Introduction To Remote OperationIset Enter OCPAddr Sending a Remote CommandOutput Reading the GP-IB AddressDisp a Often Used CommandsGetting Data From The Supply Disp a Returning the Supply to Local Mode Output Ranges Output Connections and Operating InformationRange Selection Protection FeaturesOperating Quadrants Typical Output Range Characteristics Connecting the Load Page AWG Wire Size Wire Bundled 10 a 20 aMultiple Loads Remote Voltage SensingRemote Sense Connections Remote Voltage SensingOpen Sense Leads Output Type FormulaOutput Noise Considerations Programming Response Time with an Output CapacitorExternal Trigger Circuit Overvoltage Trigger ConnectionsEquivalent Internal OV Trigger Circuit Parallel Operation Power Supply Protection ConsiderationsBattery Charging CV Operation Maximum Allowable Voltage SettingRemote Sensing CC Operation13. Series Connections with Local Sensing CV Operation Series Operation14. Series Connections with Remote Sensing Specifications for Series OperationPage Interface Function Remote OperationGP-IB Operation GP-IB Address Selection Numeric Data Power-On Service Request PONProgramming Syntax Sheet 1 of 2. Syntax Forms for Power Supply Commands Sheet 2 of 2. Syntax Forms for Power Supply Commands Data Range Power Supply Commands Header Output ChannelInitial Conditions Power Supply CommandsCurrent Programming Voltage ProgrammingVSET? VOUT?IOUT? Avg Current-Avg RangeAvg ResolutionOutput On/Off Range SwitchingOvercurrent Protection OCP Overvoltage OV ProtectionOVSET? Status Reporting Clear CommandMultiple Output Storage & Recall UNR +CC Functional Relationship of Status RegistersUnmask 2,XXX ASTS?UNMASK? PON RQS ERR RDY FAU FAULT?Service Request Generation Bit Assignment of the Serial Poll RegisterSRQ? RQS Bit Reprogramming DelayOther Queries Display On/OffCMODE? TEST?Front Panel Response GP-IB Code Error Messages ExplanationCode Explanation Front PanelResponse Code TEST? ResponsesGeneral Local ModeLocal Operation Local Control Of Output FunctionsSetting Current Setting VoltageDisplaying the Contents of the Fault Register Setting Overvoltage ProtectionResetting Overvoltage Protection Resetting Overcurrent ProtectionCondition Setting the Reprogramming DelaySetting the Supply’s GP-IB Address Local Control Of System FunctionsRCL Enter Displaying Error MessagesAddr Enter STO EnterTest Equipment and Setup Required Calibration ProceduresFigure A-1. Calibration Setup See Figure General Calibration ProcedureTable A-1. Calibrat ion Commands Header Channel Data Syntax Page Pause Calibration Program10 ! Calibration Example Clear Voltmeter Output BufferFnend Input ANY More Outputs to CALIBRATE? Y or N,X$Disp END of Calibration Program Page Voltage and Current Programming Programming With a Series 200/300 ComputerPath Names Voltage and Current Readback Voltage and Current Programming With VariablesPresent Status Programming Power Supply RegistersPrint OUTPUT1 is in CV Mode END if Service Request and Serial PollPrint Overvoltage on Output #2 Enable IntrOFF Intr Print ’’OVERVOLTAGE on Output #1Error Detection Stored Operating States Programming Outputs Connected In ParallelInput Enter Operating VOLTAGE,V1 Input Enter Voltage LIMIT’’,VInput Enter the Desired Current Limit POINT,I Programming Outputs Connected In SeriesCommand Description Command SummaryTable C-1. Command Summary Table C-l. Command Summary ROM? PON?SRQ? Test Responses Error Codes and MessagesPower-On Self Test Messages Error Responses Table D-l. Power-On Self Test Error MessageError Code Message Explanation ERR? query ERR key Table D-2. Error ResponsesResponse Code Explanation TEST? query Table D-3. TEST? ResponsesMake Changes Manual Backdating6623A Generally Applicable AnnotationsII. CE’92 Product Specific Annotations 6621AUnited States Latin America Agilent Sales and Support OfficeManual Updates

6627A, 6621A, 6624A, 6623A, 6622A specifications

Agilent Technologies is renowned for its high-quality electronic test and measurement equipment, and the Agilent 6600 series is no exception. This series includes models like the Agilent 6621A, 6622A, 6623A, 6624A, and 6627A, each designed to meet the needs of various application requirements, making them an essential part of modern laboratories.

The Agilent 6621A is a single-output DC power supply that provides a stable output voltage and current, making it ideal for testing and powering electronic devices. It features a low noise specification, which is crucial for sensitive applications. With a maximum output voltage of 30V and a current of 3A, it offers flexibility for a range of projects, from powering prototypes to performing benchmark tests.

The Agilent 6622A, a dual-output model, enhances versatility by allowing users to power two devices concurrently. It delivers output voltages of up to 20V and a total output current of 5A, which is perfect for powering circuit boards with multiple components. The built-in voltage and current limiting functions protect the equipment under test, preventing any potential damage.

On the other hand, the Agilent 6623A provides additional capabilities with its three outputs, making it particularly suitable for complex testing procedures. With a maximum voltage of 20V and output current reaching 6A across all channels, it ensures that multiple loads can be powered simultaneously without compromising performance.

The Agilent 6624A further pushes these capabilities with its higher output power. This model boasts two outputs with a combined maximum output of up to 6A, supporting devices that require more demanding power levels. Its advanced control features allow for precise voltage and current adjustments, enhancing reliability during experiments.

Lastly, the Agilent 6627A stands out as a highly scalable power supply, capable of delivering up to 40V and 7.5A across its multiple outputs. This model is particularly beneficial for applications requiring higher voltages, enabling engineers and technicians to work with a broader array of components and systems.

All models in the Agilent 6600 series incorporate built-in protection features to guarantee safety during testing. They are equipped with memory functions, allowing users to save and recall settings quickly. Additionally, the intuitive interface and various connectivity options make these power supplies user-friendly, ensuring efficient workflow in any laboratory setting. In summary, the Agilent 6600 series offers a compelling combination of versatility, precision, and advanced features, catering to diverse electronic testing applications.
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