Agilent Technologies 6621A, 6627A, 6622A manual Functional Relationship of Status Registers, Unr +Cc

Page 70

Figure 5-3. Functional Relationship of Status Registers

The supply has one serial poll register which services all outputs and provides the user with other power supply status- related information as discussed on page 75.

Status Register. Each output channel of the power supply maintains its present status in an 8-bit register. This status register reports the status of the output channel whenever it is queried. A "1" in any of the bit positions indicates that the condition is true. As long as the condition continues to be true, the bit will remain set. Assignments for the bits are shown in Table 5-5.

Decoding of the reading is based on the weighted number placed on each bit of the 8-bit status registers. For example, bit position 5 in the register has a bit weight of 32 (see Table 5-5). Each bit is assigned to a particular condition and the corresponding bit weight is used to identify that condition. When set, bit 5 indicates that the associated output is in the unregulated state. If this is the only bit that is set, the number 32 will be returned when the output’s status register is queried.

 

Table 5-5. Bit Alignment for the Status, A Status, Fault, and Mask Register

 

Bit Position

7

6

5

4

3

2

1

0

Bit Weight

128

64

32

16

8

4

2

1

Meaning

CP

OC

UNR

OT

OV

-CC

+CC

CV

Where

 

 

 

 

 

 

 

 

CV = Constant Voltage Mode

+CC = Positive Constant Current Mode - CC = Negative Current Limit Mode

OV = Overvoltage Protection circuit tripped

OT = Over Temperature Protection circuit tripped UNR = Unregulated Mode

OC = Over Current Protection tripped CP = Coupled parameter (See Note)

Note: When the range is automatically switched as discussed on page70, the CP bit is set. It is cleared when you send a voltage or current value that causes no range change.

Remote Operation 73

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Contents Operating Manual Agilent Part NoCertification Safety Summary Safety Summary Environmental ConditionsDeclaration of Conformity EMCWhat this Manual Contains Table Of Contents Remote Operation Local OperationCalibration Command SummaryError Messages Programming With a Series 200/300 ComputerIntroduction Safety ConsiderationsGeneral Information Instrument and Manual IdentificationModel AccessoriesDescription Output Combinations AvailableBasic Operation GP-IB BoardOutput Boards Qualifying Conditions SpecificationsDefinitions Output Response Characteristics Specifications Source EffectSupplemental Characteristics Outputs Low High Voltage Temperature CoefficientReadback Resolution OVPLow Voltage General Information General Information General Information General Information Initial Inspection InstallationLocation and Cooling Input Power Requirements Line FuseGP-IB Line FusesPower Cord Line Voltage ConversionGP-IB Interface Connector Getting Started Front Panel Controls and IndicatorsTurning On Your Supply 15V 35A Output Controls and Indicators Number Controls/lndicators Test Pattern of all Display Segments at Power-on Normal Self Test IndicationsChecking Out Your Supply Using Local Control Sample Self-Test Failure DisplayOvervoltage Test Voltage TestCurrent Test OCP Introduction To Remote OperationIset Enter RSTReading the GP-IB Address Sending a Remote CommandOutput AddrGetting Data From The Supply Often Used CommandsDisp a Disp a Returning the Supply to Local Mode Output Connections and Operating Information Output RangesOperating Quadrants Protection FeaturesRange Selection Typical Output Range Characteristics Connecting the Load Page Wire Size Wire Bundled 10 a 20 a AWGRemote Voltage Sensing Multiple LoadsRemote Voltage Sensing Remote Sense ConnectionsProgramming Response Time with an Output Capacitor Output Type FormulaOutput Noise Considerations Open Sense LeadsOvervoltage Trigger Connections External Trigger CircuitEquivalent Internal OV Trigger Circuit Battery Charging Power Supply Protection ConsiderationsParallel Operation Maximum Allowable Voltage Setting CV OperationCC Operation Remote SensingSeries Operation 13. Series Connections with Local Sensing CV OperationSpecifications for Series Operation 14. Series Connections with Remote SensingPage GP-IB Operation Remote OperationInterface Function GP-IB Address Selection Programming Syntax Power-On Service Request PONNumeric Data Sheet 1 of 2. Syntax Forms for Power Supply Commands Sheet 2 of 2. Syntax Forms for Power Supply Commands Power Supply Commands Header Output Channel Data RangePower Supply Commands Initial ConditionsVOUT? Voltage ProgrammingVSET? Current ProgrammingAvg Current-Avg RangeAvg Resolution IOUT?Range Switching Output On/OffOVSET? Overvoltage OV ProtectionOvercurrent Protection OCP Multiple Output Storage & Recall Clear CommandStatus Reporting Functional Relationship of Status Registers UNR +CCUNMASK? ASTS?Unmask 2,XXX Bit Assignment of the Serial Poll Register FAULT?Service Request Generation PON RQS ERR RDY FAUSRQ? Reprogramming Delay RQS BitDisplay On/Off Other QueriesTEST? CMODE?GP-IB Code Error Messages Explanation Front Panel ResponseTEST? Responses Front PanelResponse Code Code ExplanationLocal Control Of Output Functions Local ModeLocal Operation GeneralSetting Voltage Setting CurrentResetting Overcurrent Protection Setting Overvoltage ProtectionResetting Overvoltage Protection Displaying the Contents of the Fault RegisterLocal Control Of System Functions Setting the Reprogramming DelaySetting the Supply’s GP-IB Address ConditionSTO Enter Displaying Error MessagesAddr Enter RCL EnterCalibration Procedures Test Equipment and Setup RequiredFigure A-1. Calibration Setup Table A-1. Calibrat ion Commands Header Channel Data Syntax General Calibration ProcedureSee Figure Page Clear Voltmeter Output Buffer Calibration Program10 ! Calibration Example PauseDisp END of Calibration Program Input ANY More Outputs to CALIBRATE? Y or N,X$Fnend Page Path Names Programming With a Series 200/300 ComputerVoltage and Current Programming Voltage and Current Programming With Variables Voltage and Current ReadbackService Request and Serial Poll Programming Power Supply RegistersPrint OUTPUT1 is in CV Mode END if Present StatusPrint ’’OVERVOLTAGE on Output #1 Enable IntrOFF Intr Print Overvoltage on Output #2Error Detection Programming Outputs Connected In Parallel Stored Operating StatesInput Enter Voltage LIMIT’’,V Input Enter Operating VOLTAGE,V1Programming Outputs Connected In Series Input Enter the Desired Current Limit POINT,ITable C-1. Command Summary Command SummaryCommand Description Table C-l. Command Summary PON? ROM?SRQ? Table D-l. Power-On Self Test Error Message Error Codes and MessagesPower-On Self Test Messages Error Responses Test ResponsesTable D-2. Error Responses Error Code Message Explanation ERR? query ERR keyTable D-3. TEST? Responses Response Code Explanation TEST? queryManual Backdating Make Changes6621A Generally Applicable AnnotationsII. CE’92 Product Specific Annotations 6623AAgilent Sales and Support Office United States Latin AmericaManual Updates

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

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