Agilent Technologies 6812B, 6813B, 6811B RS-232 Interface, Interface Commands, RS-232 Data Format

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Installation - 2

RS-232 Interface

The ac source provides an RS-232 programming interface, which is activated by commands located under the front panel Address key. When the RS-232 interface is selected, the GPIB interface is disabled.

NOTE: Sending or receiving data over the RS-232 interface when not configured for REMOTE operation can cause unpredictable results. Always make sure the ac source is configured for remote operation when using the RS-232 interface.

Interface Commands

All SCPI commands are available through RS-232 programming. The SYSTem:LOCal, SYSTem:REMote, and SYSTem:RWLock commands are only available through the RS-232 interface.

SYSTem:LOCal Places the ac source in local mode during RS-232 operation.The front panel keys are functional.

SYSTem:REMote Places the ac source in remote mode during RS-232 operation. All front panel keys except the LOCAL key are disabled.

SYSTem:RWLock Places the ac source in remote mode during RS-232 operation. All front panel keys including the LOCAL key are disabled.

RS-232 Data Format

♦constant 11-bit data format

♦one start bit

♦seven data bits plus a parity bit (even or odd parity), or eight data bits without parity (parity bit is "0")

♦two stop bits

You can specify one of the following baud rates: 300 600 1200 2400 4800 9600

NOTE: The ac source always uses one start bit and two stop bits regardless of the baud rate. The number of start and stop bits is not programmable.

RS-232 Connector

The RS-232 connector is a DB-9, male connector. You can connect the ac source to any computer or terminal with a properly configured DB-25 connector. You can use a standard Agilent 24542G or 24542H interface cable.

Table 2-2.RS-232 Connector

1 2 3 4 5

6 7 8 9

Pin

1

2

3

4

5

6

7

8

9

Input/Output

Output

Input

Output

Output

Common

Input

Output

Description

Reserved for service use Receive Data (RxD) Transmit Data (TxD)

Data Terminal Ready (DTR) Signal ground

Data Set Ready (DSR) no connection

no connection

Reserved for service use

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Contents User’s Guide AC Power Solutions Agilent Models 6811B, 6812B, and 6813BCertification Warranty InformationGeneral Safety SummarySafety Symbols EMC DeclarationPrinting History Acoustic Noise InformationTable of Contents Entry Keys Examples of Front Panel Programming Performing the Calibration ProcedureIntroduction Performing the Verification TestsLine Voltage Conversion Error Number ListPage Location Document OrientationTopic Options and Parts Safety ConsiderationsEarlier AC Source Models OptionsAgilent Part Number DescriptionOperator Replaceable Parts Model Description Front Panel/Remote OperationCapabilities Steady-state Output Characteristic in real-time mode Steady-state Output CharacteristicPeak Current Limit Peak Current/Dynamic Power CapabilityPeak Inrush Example Typical Peak Current Output CapacitiesCapacitance in μF 127 254 Ipeak settingVoltage Regulation RMS Current Limit CircuitOutput Impedance Real Time RegulationOutput Coupling Page Inspection CleaningDamage Packaging Material Items SuppliedBench Operation LocationRack Mounting Not block the fan exhaust at the rear of the unitInput Source and Line Fuse Installing the Power CordInput Connections Output Connections Connecting the Power CordRemote Sense Connections Wire ConsiderationsVoltage Drops Current RatingsRemote Sense Connections Remote Sensing and OVP Considerations Trigger ConnectionsDigital Connections Controller Connections Gpib ConnectorRS-232 Connector Interface CommandsRS-232 Interface RS-232 Data FormatNull Modem Interface Lines Response Data Terminator Hardware HandshakePreliminary Checkout IntroductionCheckout Procedure Using the KeypadPress Output On/Off Press 1, 2, 0, EnterPress Protect Press 1, 6, 0, EnterSelftest Errors Error MessagesPower-On Selftest Errors Case of TroubleLine Fuse Runtime Error MessagesIndicates May appear at runtimePage Front Panel, Overall View Front Panel DescriptionAC+DC System Keys Dis lay Command FunctionScrolling Keys Function KeysImmediate Action Keys Meter Display Keys Display Command FunctionDisplay Measurement DisplayList Output Control KeysRST CLS Protection and Status Control KeysProtclear Initimmed Trigger and List Control KeysIMM AbortThrough Are used for entering numeric values Is the decimal Entry KeysSet the output to 120 V rms as follows Setting the Output Voltage AmplitudeExamples of Front Panel Programming Setting the DC Offset Setting the Output FrequencyTo verify the output, use the meter menu ActionOvercurrent protection feature as follows Setting a Protection FeatureBit Number Bit Weight Clearing Protection ConditionsPulse Using Transient Voltage ModesPulse Transient Step TransientVoltt Voltm StepVoltm Pulse List TransientWidth DcycleVoltm Fixed List Count Dwel Trigger Delays and Phase SynchronizationDwel EOL Volt Volt EOL Step AutoSyncphas Initimmed Syncsour PhaseExample Display Programming Slew Rates Using Slew Rates to Generate WaveformsSlew Voltm FixedStep Slewm SlewtMeasuring Peak Inrush Current Syncsour Phase SyncphasCurrlev CurrpeakTo configure the RS-232 interface, proceed as follows Setting the Gpib Address and RS-232 ParametersSaving and Recalling Operating States Action Display To set the Gpib address, proceed as followsTable A-1. Performance Specifications1 SpecificationsTable A-1. Performance Specifications Table A-2. Supplemental Characteristics Supplemental CharacteristicsTrig Out HC TTL output Trig In 10k pullup Table A-3. Operation Below 45 Hz Operation Below 45 HzPage Equipment Required Verification and CalibrationRecommended Model Test SetupTable B-1. Equipment Required Performing the Verification Tests Turn-On Checkout ProcedureAC Voltage Programming and Measurement Accuracy Action Normal ResultRMS Current Accuracy Test DC Voltage Programming and Measurement AccuracyVolt 0, Outpcoup DC, Offset Volt 50, Currrange LOW, CurrlevTable B-3. Agilent 6812B Verification Test Record Table B-2. Agilent 6811B Verification Test RecordDC Programming and Measurement Accuracy RMS Current Measurement AccuracyTable B-4. Agilent 6813B Verification Test Record Table B-3Front Panel Calibration Menu Performing the Calibration ProcedureCalibrating and Entering Voltage Offset Values Enable Calibration ModeFront Panel Calibration Callev P4 Calibrating and Entering DC Voltage Gain ValuesCalibrating and Entering AC rms Voltage Gain Values Calibrating and Entering rms Current Values Calibrating the OVP Trip PointCalibrating the Output Impedance Calibrating and Entering rms Current Measurement ValuesSaving the Calibration Constants OFFCalibration Error Messages Changing the Calibration PasswordTable B-5. Gpib Calibration Error Messages Calibration Over the GpibFigure B-2. Calibration Program Listing Sheet 1 Figure B-2. Calibration Program Listing Sheet 2 Figure B-2. Calibration Program Listing Sheet 3 Page Table C-1. Error Numbers Error Number ListError Messages Error Messages C Page Check the Power Transformer Connector all Models Check the Jumper Wire Model Agilent 6811B/6812B onlyOpen the Unit Check the Line Jumpers all ModelsFigure D-1. Line Voltage Conversion Components Close the UnitIndex Index Index Canada Australia/New Zealand United States Latin AmericaEurope Asia Pacific JapanManual Updates
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6812B, 6811B, 6813B specifications

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