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E4356A Operating and Programmign Guide

1. Assume Vinominal 208 Vac 208 V 8 low 191 V K 233 V Aa Rear of instrument Instrument operates between 191 amp 250 Vac instrument will not operate on a 120 Vac line i Instrument requires an a c input voltage in the window 191 250 Vac Figure 2 3 Connection to a 3 Phase Line Installation 19 VXI plug amp play Power Products Instrument Drivers VXI plug amp play Power Products 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 Power Products instrument VXI plug amp 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 System Requirements Agilent VEE The VXI plug amp play Power Products instrument driver Microsoft Visual BASIC complies with the following e Microsoft Visual C C Microsoft Windows 95 e Borland C C Microsoft Windows NT 4 0 e National Instruments LabVIEW HP VISA revision F 01 02 e National Instruments LabWindows CVI National Instruments VISA 1 1 Downloading and Installing the Driver NOTE Before installing
2. FOLD OFF These commands enable or disable Foldback protection None FOLD CC Foldback protection disables the power supply output if the power FOLD 2 supply switches to whichever mode CV or CC is defined as the FOLD 0 fold error condition Note that foldback protection is disabled FOLD CV during the DELAY period FOLD 1 Initial condition FOLD OFF FOLD CC FOLD 2 FOLD This command reads the Foldback setting None x any digit within range MA milliampere MV millivolt MS millisecond 120 Compatibility Language Table G 1 ARPS Commands continued ARPS Command Description Similar SCPI Command RST This command resets the power supply if the output is disabled by OUTP PROT CLE the overvoltage remote inhibit or foldback protection circuits The power supply resets to the parameters stored for the power on state Note that the settings can be changed while the unit is disabled HOLD OFF These commands determine if certain newly received VOLT TRIG HOLD 0 commands are immediately acted on by the power supply CURR TRIG HOLD ON or are acted on later while the unit continues to operate with HOLD 1 previously received values HOLD ON can be used to synchronize power supply actions with the actions of other GPIB devices See the TRG command Initial condition HOLD OFF HOLD This command reads the HOLD setting VOLT TRIG CURR TRIG These commands cause the power
3. Note HPSL and TMSL Test and Measurement System Language were earlier versions of SCPI If you have programmed in either then you probably can go directly to Chapter 3 Language Dictionary Conventions The following conventions are used throughout this chapter Angle brackets lt gt Items within angle brackets are parameter abbreviations For example lt NR1 gt indicates a specific form of numerical data Vertical bar Vertical bars separate one of two or more alternative parameters For example OIOFF Square Brackets Co Items within square brackets are optional The representation SOURce CURRent indicates that you may enter either 0 or OFF for the required parameter means that SOURce may be omitted Braces Braces indicate parameters that may be repeated zero or more times It is used especially for showing arrays The notation lt A gt lt B gt shows that A is a required parameter while B may be omitted or may be entered one or more times Boldface font Boldface font is used to emphasize syntax in command definitions TRIGger DELay lt NRf gt shows a command syntax Computer font Computer font is used to show program text within normal text TRIGger DELay 5 represents program text Types of SCPI Commands SCPI has two types of commands common and subsystem Common Commands Common commands generally are not related to specific operation but to co
4. Output VOLTAGE and CURRENT rotary RPG knobs SYSTEM keypad FUNCTION keypad ENTRY keypad Power LINE switch Some keys have two functions For example the System key can be used either to recall a stored operating state or to store an operating state The first operation is shown on the key and the second shifted operation is shown in blue above the key In order to do a shifted operation first press the solid blue key which is unlabeled but shown throughout this manual as Shift For example for a recall operation press the recall key Recall For a save operation press the save key which is Shift Recall When you do this the Shift annunciator will light to remind you that the key is now functioning as the key In this chapter such a shifted operation may be shown simply as Save Front Panel Operation 37 ii a al ae ad ao ICOC Figure 5 1 Front Panel Controls and Indicators Table 5 1 Front Panel Controls and Indicators See Figure 5 1 Control or Function or Indication Indicator Display VOLTS Shows present output voltage of the power supply AMPS Shows present output current of the power supply Status Annunciators CV The power supply is in constant voltage mode CC The power supply is in constant current mode Unr The power supply output is unregulated output is neither C
5. Meaning and Type Identification Query System Interface Description This query requests the power supply to identify itself It returns a string composed of four fields separated by commas Query Syntax IDN Returned Parameters lt AARD gt Field Information Agilent Technologies Manufacturer XXXX 4 digit model number followed by a letter suffix nnnnA nnnnn 10 character serial number or 0 lt R gt XX XX Revision levels of firmware Example Agilent Technologies 6681 0 A 00 01 Related Commands None OPC Meaning and Type Operation Complete Device Status Description This command causes the interface to set the OPC bit bit 0 of the Standard Event Status register when the power supply has completed all pending operations See ESE for the bit configuration of the Standard Event Status register Pending operations are complete when All commands sent before OPC have been executed This includes overlapped commands Most commands are sequential and are completed before the next command is executed Overlapped commands are executed in parallel with other commands Commands that affect output voltage current or state relays and trigger actions are overlapped with subsequent commands sent to the power supply The OPC command provides notification that all overlapped commands have been completed Any change in the output level caused by previous commands has been completed completion of settling time relay bounce etc
6. SOUR CURR LEV IMM AMPL none IMINIMAX SOUR CURR LEV TRIG AMPL lt NRf gt suffix SOUR CURR LEV TRIG AMPL none IMINIMAX SOUR CURR PROT STAT 0 IL ONIOFF SOUR CURR PROT STAT none SOUR DIG DATA VAL lt NRf gt SOUR DIG DATA VAL none DISP WIND MODE NORMITEXT DISP WIND MODE none DISP WIND STAT 0 Il OFFION DISP WIND STAT none DISP WIND TEXT DATA lt STR gt DISP WIND TEXT DATA none INIT IMM none INIT CONT 0111 OFFION INIT CONT none Common Commands Command Parameters Command _ Parameters Command Parameters None OPC None SRE lt NRf gt lt NRf gt PSC lt bool gt SRE None None PSC None STB None None RCL lt NRf gt TRG None None RST None TST None None SAV _ lt NRf gt WAI None Programming Parameters Table 7 1 list the programming parameters For programming accuracy and resolution refer to Appendix A Table 7 1 Power supply Programming Parameters see note Parameter CURR LEV MAX and CURR LEV TRIG MAX 30 71 A Programming range is 0 to MAX RST Current Value 0 14A RST Value 200 ms VOLT LEV MAX and VOLT LEV TRIG MAX 81 9 V Programming range is 0 to MAX RST Voltage Value 0V VOLT PROT MAX 96 0 V Programming range is 0 to MAX RST OVP value MAX 86 Language Dictionary Status Reporting Power
7. Use load leads of a sufficient wire size so that the absolute voltage difference between the output terminal of the master unit and the output terminal of the first slave unit is kept under 2 V at rated current This also applies to the voltage difference between the output terminals of the first and second slave units If remote sensing is required connect the load to the remote sense terminals of the master unit as shown by the dashed lines in Figure 4 7 32 User Connections Analog Connector Slave Unit Master Unit Program only the master Set slave output and OVP slightly higher than the master to ensure that slave stays in CC mode Load _ Load Connection Only local sensing permitted _2 Connect for optional remote sensing Figure 4 7 Auto Parallel Connection Remote Sensing Optional Auto Parallel Programming Program only the first master unit in the series the slave units automatically track the master s output However the voltage and OVP settings of the slave units must be set higher than the operating voltage of the master unit This ensures that the slave units will operate in CC mode Functions such as status voltage readback and current readback can still be read back individually for each unit If a slave unit experiences a desired shutdown condition such as overtemperature or overcurrent it will not automatically shut down all other units You must first enable remote inhibit RI and dis
8. GOSUB 2000 1270 END 1275 2000 Send command to power supply 2005 LENGTH LEN CODES 2010 CALL IOOUTPUTS PS CODES LENGTH Send command to interface 2015 IF PCIB ERR lt gt NOERR THEN ERROR PCIB BASERR ISETUP BAS error trap 2020 RETURN 2025 3000 Get data from power supply 3005 CALL IOENTERA PS OUTPUTS 1 MAX ELEMENTS ACTUAL ELEMENTS 3010 IF PCIB ERR lt gt NOERR THEN ERROR PCIB BASERR 3015 RETURN PEELE LEELEE III III II II RIK PIRI IBM Controller Using National Interface SREP EROS CECE OEE COREE EEREEEEEEEEEE REEE EEEEEEEE EEEE IOI OK 990 peers Merge DECL BAS here 11000 Power supply Variable PS Stand Alone Address 706 1005 CODES SPACE 50 MODE S PACE 5 0 EVENT S PACE 20 1010 D SPACE 60 OUTPUT S PACE 40 BDNAME PS 1015 DIM OUTPUT 2 1020 1025 Setup power supply interface for DOS driver 1030 CALL IBFIND BDNAME PS 1035 IF PS lt O THEN PRINT IBFIND Failed 11040 CALL IBCLR PS 1045 1050 Program power supply to CV mode with following voltage and current fe CODES VOLTAGE 78 CURRENT 25 GOSUB 2000 1060 1065 Query power supply outputs and print to screen 1070 CODES MEASURE VOLTAGE CURRENT GOSUB 2000 GOSUB 3000 1075 VOUT OUTPUT 1 1080 IOUT OUTPUT 2 1085 PRINT The programmed levels are VOUT Volts and IOUT Amps 1090 1095 Program triggered current level
9. This appendix provides operation verification test procedures The tests do not check all the operating parameters but verify that the power supply is performing properly The required test equipment and acceptable test results are specified in tables at the end of this appendix Note Performance Tests which check all the specifications of the power supply are given in the Service Manual Test Equipment Required List of Equipment The following equipment is required to perform the tests Table C 1 Equipment Required for Verification Tests Equipment Characteristics Recommended Model Digital Voltmeter Resolution 10 nV 1 V Agilent 3458A Readout 8 1 2 digits Accuracy 20 ppm Current Monitor Resistor 100 A 0 001 Q 0 04 100 W Guildline 9230 100 Current Monitoring Resistor The 4 terminal current monitoring resistor listed in Table B 1 is required to eliminate output current measurement error caused by voltage drops in leads and connections The specified resistors have special current monitoring terminals inside the load connection terminals Connect the digital voltmeter directly to these current monitoring terminals 1 CV Test Setup 2 CC Test Setup Figure C 1 Verification Test Setup Verification 105 Performing The Tests General Measurement Techniques Figure C 1 shows the setup for the tests Be certain to use load leads of sufficient wire gauge to carry the output current see Tabl
10. 200 Default password is the four digit model number 210 220 LINE 240 PASSWORD MUST BE EDITED FOR MODEL OTHER THAN 6680 230 ce OUTPUT Ps CAL STATE ON 4356 250 1 260 OUTPUT Ps CAL VOLTAGE LEVEL MIN 270 INPUT ENTER VOLTAGE MEASUREMENT FROM EXTERNAL VOLTMETER Volt_read 280 OUTPUT Ps CAL VOLTAGE Volt_read 290 OUTPUT Ps CAL VOLTAGE LEVEL MAX 300 INPUT ENTER VOLTAGE MEASUREMENT FROM EXTERNAL VOLTMETER Volt_read 310 OUTPUT Ps CAL VOLTAGE Volt_read 320 330 Calibrate overvoltage protection circuit 340 350 OUTPUT Ps CAL VOLTAGE PROTECTION 1360 1370 GOSUB Save_cal 1380 IF Err_found THEN 390 INPUT ERRORS have occurred REPEAT VOLTAGE CALIBRATION Y OR N Resp 400 IF TRIM UPC Resp 1 1 Y THEN GOTO Volt_cal 410 ENDIF 420 IF Err_found THEN 430 PRINT VOLTAGE CALIBRATION NOT SAVED 440 ELSE 450 PRINT VOLTAGE CALIBRATION COMPLETE 460 ENDIF 470 o Calibration 103 Figure B 2 BASIC Calibration Program continued 480 Current_cal Imon DAC and Current DAC calibration 1490 Err_found 0 500 PRINT TABXY 5 10 CONNECT INSTRUMENTS AS SHOWN IN FIG A 1 2 Then Press Continue 510 PAUSE 520 CLEAR SCREEN 540 Password is optional only required if set to non zero value 550 Default password is four digit model number 560 570 LINE 590 PASSWORD MUST BE EDITED FOR MODEL OTHER THAN E4356A 580 590 OUTPUT
11. 48 volts as follows Press OV The display will change from meter mode to indicate OV followed by the present OVP value Press 4 8 Enter The display will return to the meter mode and indicate the output 45 00 volts Press again The display will now indicate OV 48 00 Press to return to the meter mode Checking OVP Operation Assuming the above operating conditions voltage programmed to 45 V and OVP programmed to 48 V trip the OVP circuit as follows m Gradually increase the output voltage by pressing until the OVP circuit trips This will cause the output voltage to drop to zero and the Prot annunciator to go on m There now is no power supply output due to an overvoltage condition m To verify this press and observe that the display indicates 0V This shows that the protection circuit tripped due to an overvoltage condition Clearing The OVP Condition With the OVP tripped return to the meter mode and try to clear the condition by pressing Prot Clear Nothing will appear to happen because the OV trip voltage is still below the programmed output voltage Thus as soon as the circuit is cleared it trips again You can clear the OV condition by m Lowering the output voltage below 48 the OV setting or m By raising the OV trip voltage above the output voltage setting Try either of these methods Now when you press the Prot annunciator will turn off and the output voltage will return to normal Programming Curre
12. 5 Observe the input rail LED under the RFI shield If the LED is on there is still hazardous voltage inside the unit Wait until the LED goes out this may take several minutes before proceeding 6 Connect a de voltmeter across test points TP1 and TP2 It may be necessary to remove the RFI shield in order to reach these test points The shield is secured by four screws on each side When the voltmeter indicates 60 volts or less it is safe to work inside the power supply 7 Locate the line selector switch and slide it to the desired position 8 If you removed it in step 6 be sure to replace the RFI shield 9 Replace the dustcover RFI SHIELD AFI SHIELD Figure E 1 Line Select Switch Line Voltage Conversion 111 Digital Port Functions Digital Connector A 4 pin connector and a quick disconnect mating plug are provided for digital input and output signals see Figure F 1 for wiring connections and Table A 2 for electrical characteristics This digital port can be configured to provide either Fault Inhibit or Digital I O functions Note Consistent with good engineering practice twist and shield all signal wires to and from the digital connector DIG CNTL izaan PIN JOGI TAL VO FAULT INHIBIT Pa f ouro Fir output e i common NH Common Figure F 1 Digital Port Connector A Insert wires AWG 12 22 Tighten screws MED Fault Inhibit Op
13. Not used OC Overcurrent protection circuit has tripped OT Overtemperature status condition exists OV Overvoltage protection circuit has tripped RI Remote inhibit is active UNR Power supply output is unregulated Note See Chapter 4 Status Reporting for more explanation of these registers STAT OUES This query returns the value of the Questionable Event register The Event register is a read only register which holds latches all events that are passed by the Questionable NTR and or PTR filter Reading the Questionable Event register clears it Query Syntax STATus QUEStionable EVENt Parameters None Returned Parameters lt NRI gt Register Value Examples STAT QUES STATUS QUESTIONABLE EVENT Related Commands CLS STAT QUES ENAB STAT QUES NTR STAT QUES PTR 80 Language Dictionary STAT QUES COND This query returns the value of the Questionable Condition register That is a read only register which holds the real time unlatched questionable status of the power supply Query Syntax Parameters Examples Returned Parameters Related Commands STAT QUES ENAB STATus QUEStionable CONDition None STAT QUES COND STATUS QUESTIONABLE CONDITION lt NRI gt Register value None This command and its query set and read the value of the Questionable Enable register This register is a mask for enabling specific bits from the Questionable Event register to set the questionable summary bit QUES of the Statu
14. Ps CAL STATE ON 4356 600 OUTPUT Ps VOLT LEV 2 610 Refer to Table A 1 for correct shunt value for model being calibrated 620 630 INPUT ENTER VALUE OF CURRENT SHUNT BEING USED Shunt_val 680 OUTPUT Ps CAL CURRENT LEVEL MIN 690 INPUT ENTER VOLTAGE MEASUREMENT FROM EXTERNAL VOLTMETER Volt_read 700 Current Volt_read Shunt_val 710 OUTPUT Ps CAL CURRENT Current 720 OUTPUT Ps CAL CURRENT LEVEL MAX 730 INPUT ENTER VOLTAGE MEASUREMENT FROM EXTERNAL VOLTMETER Volt_read 740 Current Volt_read Shunt_val 750 OUTPUT Ps CAL CURRENT Current 760 GOSUB Save_cal 770 IF Err_found THEN 780 INPUT ERRORS have occurred REPEAT CURRENT CALIBRATION Y OR N Resp 790 IF TRIM UPC Resp 1 1 Y THEN GOTO Volt_cal 800 END IF 810 IF Err_found THEN 820 PRINT CURRENT CALIBRATION NOT SAVED 830 ELSE 840 PRINT CURRENT CALIBRATION COMPLETE 850 END IF 860 STOP 870 Save_cal SAVE CALIBRATION 880 REPEAT 890 OUTPUT Ps SYSTEM ERROR 900 ENTER Ps Err_num Err_msg 910 IF Err_num lt gt 0 THEN 920 PRINT ERROR Err_msg 930 Err_found 1 940 END IF 950 UNTIL Err_num 0 960 IF NOT Err_found THEN 970 INPUT SAVE CALIBRATION CONSTANTS Y OR N Resp 980 IF TRIM UPC Resp 1 1 Y THEN 990 OUTPUT Ps CAL SAVE 1000 END IF 1010 ENDIF 1020 OUTPUT Ps CAL STATE OFF 1030 RETURN 1040 END 104 Calibration Verification Introduction
15. Remote Programming 47 The optional header SOURCE precedes the current digital and voltage subsystems This effectively makes CURRENT DIGITAL and VOLTAGE root level commands Moving Among Subsystems In order to combine commands from different subsystems you need to be able to restore the active path to the root You do this with the root specifier For example you could clear the output protection and check the status of the Operation Condition register as follows OUTPUT PROTECTION CLEAR STATUS OPERATION CONDITION By using the root specifier you could do the same thing in one message OUTPUT PROTECTION CLEAR STATUS OPERATION CONDITION Note The SCPI parser traverses the command tree as described in Appendix A of the IEEE 488 2 standard The Enhanced Tree Walking Implementation given in that appendix is not implemented in the power supply The following message shows how to combine commands from different subsystems as well as within the same subsystem VOLTAGE LEVEL 7 PROTECTION 8 CURRENT LEVEL I50 PROTECTION ON Note the use of the optional header LEVEL to maintain the correct path within the voltage and current subsystems and the use of the root specifier to move between subsytems Including Common Commands You can combine common commands with system commands in the same message Treat the common command as a message unit by separating it with the message unit separator Common commands do not affect the activ
16. SEQUENCE SETS UP CV MODE OPERATION FORCES UNIT TO SWITCH TO CC MODE AND DETECTS AND REPORTS MODE CHANGE KK K KK K K KK K K FKK K 2K KK 2K K 2s fe K K K K K K K K K K K K K K 2K K K 2K K K K K 3K 2K K K K K K ois K K K K KK K K 2K K K K K K K K 3K 2K K K K K K HP Vectra PC Controller Using Agilent 82335A Interface KK K KK K K KK K K 2K K K fe K K K K 3K fe K K K K K K K K K K KK K K FKK K 2K K K K K 3K 2K K K K K 3K K K K K K KK K K 2K K K K K K K K 3K 2K K K K K K 5 P e eoapae sasaat Merge SETUP BAS here gt 1000 MAX ELEMENTS 2 ACTUAL ELEMENTS 0 MAX LENGTH 80 ACT LENGTH 0 1005 DIM OUTPUTS 2 CDDES SPACE 40 1010 ISC 7 PS 706 1015 1020 Setup the Power supply Interface for DOS driver 1025 CALL IORESET ISC Resetthe interface 1030 IF PCIB ERR lt gt NOERR THEN ERROR PCIB BASERR 1035 TIMEOUT 3 1040 CALL IOTIMEOUT ISC TIMEOUT Set timeout to 3 seconds 1045 IF PCIB ERR lt gt NOERR THEN ERROR PCIB BASERR 1050 CALL IOCLEAR ISC Clear the interface 1055 IF PCIB ERR lt gt NOERR THEN ERROR PCIB BASERR 1060 CALL IOREMOTE ISC Set Power supply to remote mode ie IF PCIB ERR lt gt NOERR THEN ERROR PCIB BASERR 1070 1075 Program power supply to CV mode with following voltage and current te CODES VOLTAGE 78 CURRENT 25 GOSUB 2000 1085 1090 Query power supply outputs amp print to screen 1095 CODES MEASURE VOLTAGE CURRENT GOSUB 2000 GOSUB 3000
17. battery charging 29 C cables 14 calibration equipment 99 example 105 GPIB 102 password 100 102 procedure 101 saving 100 setup 99 calibration commands CAL CURR 103 CAL CURR LEV 103 CAL PASS 103 CAL SAVE 103 CAL STAT 104 CAL VOLT 104 CAL VOLT LEV 104 CAL VOLT PROT 104 calibration errors 102 capacitive loads 28 cc mode 16 42 character strings 51 characteristics 96 output 16 checkout in case of trouble 24 output current 23 output voltage 22 power on 21 preliminary 21 replacing fuse 25 save and recall 24 checksum errors 26 combine commands common commands 48 root specifier 48 command completion 52 command summary 85 common command syntax 64 common commands CLS 64 ESE 65 ESR 65 IDN 66 OPC 66 OPC 67 OPT 67 PSC 67 RCL 68 RST 69 SAV 69 SRE 70 STB 70 TRG 71 TST 71 WAL 71 Compatibility language 121 connection LS 30 LS 30 sense leads 30 connections auto parallel 32 controller 35 external voltage control 34 multiple load 32 output 29 series 33 single load 31 Index 123 connector analog 27 digital 28 controller connections 35 linked 35 stand alone 35 conventions 46 CRD 51 current monitor resistor 107 current programming 41 53 current sinking 16 cv mode 16 42 damage 17 description 15 detecting SRQ events 54 DFI descrete fault indicator 90
18. e All triggered actions are completed OPC does not prevent processing of subsequent commands but Bit 0 will not be set until all pending operations are completed Command Syntax OPC Parameters None Related Commands OPC WAI 66 Language Dictionary OPC Meaning and Type Operation Complete Device Status Description This query causes the interface to place an ASCII 1 in the Output Queue when all pending operations are completed Pending operations are as defined for the OPC command Unlike OPC OPC prevents processing of all subsequent commands OPC is intended to be used at the end of a command line so that the application program can then monitor the bus for data until it receives the 1 from the power module Output Queue AUTION Do not follow OPC with TRG or GPIB bus triggers Such triggers sent after OPC will be prevented from executing and will prevent the power supply from accepting further commands If this occurs the only programmable way to restore operation is by sending the power supply a GPIB DCL Device Clear command Query Syntax OPC Returned Parameters lt NRI gt ASCII is placed in the Output Queue when the power supply has completed operations Related Commands OPC TRIG WAI OPT Meaning and Type Option Identification Query Description This query requests the power supply to identify any options that are installed Options are identified by number A 0 indicates no options are
19. see Chapter 8 Status Reporting To re enable the unit after it has been disabled by the INH input first open the connection between pins 3 and 4 Then clear the protection circuit either from the front panel see Chapter 5 Front Panel Operation in this guide or over the GPIB see the Programming Guide Digital Port Functions 113 poe ott 123 4 Normally oud Open INH Common te Q INH Input Figure F 2 Example of Inhibit Input In Figure F 3A the FLT output is connected to a relay driver circuit that energizes a relay whenever a fault condition occurs in the power supply The relay can be used to physically disconnect the output of the power supply from the load The FLT output is generated by the logical ORing of the power supply s Operation Questionable and Event status summary bits see Chapter 8 Status Reporting in the Programming Guide You can cause one or more events to activate the FLT output by enabling the appropriate events in these status registers The fault condition is cleared by first removing the cause of the fault and then reading the appropriate status event register s In Figure F 3B the FLT output of one unit is connected to the INH input of another unit Although only two supplies are shown it is possible to chain other supplies with this arrangement A fault condition in any one of the power supplies will disable all of them without intervention either by the controller or external
20. see STB for its bit configuration are allowed to set the Master Status Summary MSS bit and the Request for Service RQS summary bit A in any Service Request Enable Register bit position enables the corresponding Status Byte Register bit and all such enabled bits then are logically ORed to cause Bit 6 of the Status Byte Register to be set See Chapter 8 Status Reporting for more details concerning this process When the controller conducts a serial poll in response to SRQ the RQS bit is cleared but the MSS bit is not When SRE is cleared by programming it with 0 the power supply cannot generate an SRQ to the controller Command Syntax SRE lt NRf gt Parameters 0 to 255 Default Value See PSC Example SRE 20 Query Syntax SRE Returned Parameters lt NRI gt Register binary value Related Commands ESE ESR PSC AUTION If PSC is programmed to 0 then the SRE command causes a write cycle to nonvolatile memory The nonvolatile memory has a finite number of write cycles see Table A 2 Supplementary Characteristics Programs that repeatedly write to nonvolatile memory can eventually exceed the maximum number of write cycles and may cause the memory to fail STB Meaning and Type Status Byte Device Status Description This query reads the Status Byte register which contains the status summary bits and the Output Queue MAV bit Reading the Status Byte register does not clear it The input summary bits are cleared wh
21. 1100 VOUT OUTPUTS 1105 IOUT OUTPUTS 2 1110 PRINT The output levels are VOUT Volts and IOUT Amps 1120 Program triggered current level to value insufficient to maintain 1125 unit within its CV operating characteristic m CODES CURR TRIG 1 GOSUB 2000 1135 11140 Setoperation status mask to detect mode change from CV to CC 1145 CODES STAT OPER ENAB 1024 PTR 1024 GOSUB 2000 1150 1155 Enable Status Byte OPER summary bit 1160 CODES SRE 128 GOSUB 2000 1165 1170 Arm trigger circuit and send trigger to power supply fee CODES INITIATE TRIGGER GOSUB 2000 1180 1185 Wait for unit to respond to trigger 1190 FOR l 1 to 100 NEXT 1195 1200 Poll for interrupt caused by change to CC mode and print to screen 1205 CALL IOSPOLL PS RESPONSE 1210 IF RESPONSE AND 128 lt gt 128 THEN GOTO 1240 No OPER event to report 1215 CODES STATUS OPER EVEN GOSUB 2000 Query status oper register 58 Remote Programming Programming Some Power supply Functions continued 11220 CALL IOENTER PS OEVENT Read back event bit 1225 IF PCIB ERR lt gt NOERR THEN ERROR PCIB BASERR 1230 IF OEVENT AND 1024 1024 THEN PRINT Unit switched to CC mode 1240 Clear the status circuit 1245 CODES CLS GOSUB 2000 1260 FOR 1T0 100 NEXT Wait for unit to clear 1265 1260 Disable output and save present state in location 2 1265 CODES OUTPUT OFF SAV 2
22. 1E 3 M milli _1E 6 U _micro Boolean Data Either form 110 or ONIOFF may be sent with commands Queries always return 1 or 0 OUTPut OFF CURRent PROTection 1 Character Data For query statements character strings may be returned in either of the forms shown in Table 6 3 depending on the length of the returned string l Table 6 3 Character Data Formats lt CRD gt Character Response Data Permits the return of character strings lt AARD gt Arbitrary ASCII Response Data Permits the return of undelimited 7 bit ASCII This data type has an implied message terminator Note The IEEE 488 2 format for a string parameter requires that the string be enclosed within either single _C_ or double _ quotes Be certain that your program statements comply with this requirement Remote Programming 51 SCPI Command Completion SCPI commands sent to the power supply are processed either sequentially or in parallel Sequential commands finish execution before a subsequent command begins A parallel command can begin execution while a preexisting command is still executing overlapping commands Commands that affect trigger actions are among the parallel commands The WAI OPC and OPC common commands provide different ways of indicating when all transmitted commands including any parallel ones have completed their operations The syntax and parameters for these commands are described in Chapter 7 Language Dictionary Some
23. 28 load inductive 29 local voltage sensing 30 location 18 master unit 32 message terminator 50 message unit separator 50 moving among subsystems 48 multiple load connections 32 multipliers 51 N NTR filter 92 numerical data format 51 0 OCP checking 42 clearing 42 programming 42 53 setting 42 operating curve 40 operation status group 87 optional headers effect 47 options 14 ouptut queue 90 OUT 0 118 OUT 1 118 output rating 16 output connections 29 output impedance 98 output isolation 28 OVP checking 41 clearing 41 programming 40 53 settting 41 P com 27 parallel polling 121 parts list 14 power cord 17 installing 18 power receptacle 13 power on 43 register states 91 power on errors 25 status registers 91 primary address 44 55 print date 5 program examples 57 programming analog 16 auto parallel 33 current 41 53 digital I O 55 external voltage 34 front panel 15 overcurrent protection OCP 42 53 overvoltage protection OVP 40 53 parameters 86 remote 15 service request 92 status 54 triggers 53 voltage 40 53 PTR filter 92 queries 48 query indicator 50 questionable status group 89 R rack mount kit 14 rack mounting 18 reading status registers 54 recalling states 43 54 relay link 28 remote voltage sensing 30 CV regulation 30 output noise 30 output rating 30 OVP considerations 31 stabi
24. GPIB library is implemented as a series of subroutine calls To access these subroutines your application program must include the header file SETUP BAS which is part of the DOS driver software SETUP BAS starts at program line 5 and can run up to line 999 Your application programs must begin at line 1000 SETUP BAS has built in error checking routines that provide a method to check for GPIB errors during program execution You can use the error trapping code in these routines or write your own code using the same variables as used by SETUP BAS National Instruments GP IB Driver Your program must include the National Instruments header file DECL BAS This contains the initialization code for the interface Prior to running any applications programs you must set up the interface with the configuration program IBCONF EXE Your application program will not include the power supply symbolic name and GPIB address These must be specified during configuration when you run IBCONF EXE Note that the primary address range is from 0 to 30 but any secondary address must be specified in the address range of 96 to 126 The power supply expects a message termination on EOI or line feed so set EOI w last byte of Write It is also recommended that you set Disable Auto Serial Polling All function calls return the status word JBSTA which contains a bit ERR that is set if the call results in an error When ERR is set an appropriate code is placed in varia
25. I As more current is demanded the voltage decreases to maintain the increased current level If the load current increases to the maximum output of the power supply the output voltage will be maintained at a near zero level Unregulated Operation If the power supply goes into a mode of operation that is neither CV nor CC the Unr annunciator will light An unregulated condition limits the output current to a value that is safe for the power supply Some unregulated states occur so briefly that they do not turn on the Unr annunciator but they may set the UNR status bit during remote operation One condition that can cause a noticeable unregulated state is low ac line voltage 42 Front Panel Operation Saving and Recalling Operating States You can save programming time by storing up to 5 operating states in nonvolatile memory The front panel programming parameters that are saved are Output voltage Output current OVP voltage m OCP state on or off Output state enabled or disabled Note More power supply parameters are saved in remote operation See Chapter 7 As an example set up the following state m Voltage 45 V Current 5 A OVP voltage 48 V m OCP on OCP annunciator on Output off Dis annunciator on Save the above state to location by pressing Save Enter Now set up the following state m Voltage 50V Current 2 5 A OVP voltage 55 V m OCP off OCP annunciator off Output on Dis annunciato
26. Installation Inspection Damage When you receive your power supply inspect it for any obvious damage that may have occurred during shipment If there is damage notify the shipping carrier and the nearest Agilent Sales and Support Office immediately Warranty information is printed in the front of this guide Packaging Material Until you have checked out the power supply save the shipping carton and packing materials in case the power supply has to be returned to Agilent Technologies If you return the power supply for service attach a tag identifying the model number and the owner Also include a brief description of the problem Items Supplied In addition to this manual check that the following items in Table 2 1 are included with your power supply see Table 1 6 for part numbers Table 2 1 Items Supplied Power cord Your power supply was shipped with a power cord appropriate for your location The cord may or may not be terminated in a power plug see Options in Chapter 1 If the cord is not included contact your nearest Agilent Sales and Support Office see end of this guide to obtain the correct cord These models also include a power input safety cover with strain relief connector It is required to secure the power cord to the power supply Analog A 7 terminal analog plug see Table 1 4 that connects to the back of the unit Analog connections are connector described in Chapter 4 Digital A 4 termina
27. Resistor calibration Appendix B Cover ac input safety 5040 1676 Cover dc output 5040 1674 Screw ac input safety cover 0515 0156 Flatwasher ac input safety cover 3050 1053 M4 0 x 60 mm long Foot cabinet 5041 8801 Screw carrying strap 0515 1384 Fuse power 25A 250V 2110 0849 M5x0 8x10 mm this is an internal fuse Knob rotary output control 0370 1091 Screw output bus bar 1 4 20x 1 2 2940 0103 Lockwasher ac input safety cover 2190 0484 Screw outer cover M5 x 0 8 mm 0515 0073 Lockwasher output bus bar 1 4 spring 3050 1690 Screw output sense terminal 0515 0104 M3x0 5x8mm Agilent 59510 11A Relay Accessories 5957 6382 Slide mount kit see Table 1 3 Agilent Series 667xA Service Manual 5961 2583 Standoff GPIB 0380 0643 Agilent E4356A Service Addendum 5964 8170 Nut output bus bar hex 1 4 20x1 2 2950 0084 Terminal crimp ac power cord Nut power ground hex w lw 3 8x32 0590 0305 L or N terminal 0362 068 1 Plug analog connector 7 terminal 1252 3698 Gnd terminal 0362 0207 Plug digital connector 4 terminal 1252 1488 14 General Information Description The Agilent E4356A is a unipolar GPIB programmable power supply which is programmable locally from the front panel or remotely via a rear panel analog control port Operational features include Constant voltage CV or constant current CC output over the rated output range Built in overvoltage OV overcurrent OC and overtemperature OT protection A
28. Status Event register Operation Enable STAT OPER ENAB 1024 Allows the latched CC event to be summed into the OPER summary bit Service Request Enable SRE 128 Enables the OPER summary bit from the Status Byte register to generate RQS Operation Condition STAT OPER EVEN When you service the request read the event register to determine that bit 10 CC is set and to clear the register for the next event All bits of the PTR registers bits are set to 1 at power on or in response to STAT PRES Adding More Operation Events To add the CV constant voltage event to this example it is only necessary to add the decimal values for bit 8 value 64 to the programming commands of the Operation Status group The commands to do this are STAT OPER PTR 1280 ENAB 1280 It is not necessary to change any other registers since the programming for the operation summary bit OPER path has already been done Servicing Questionable Status Events To add OC overcurrent and OT overtemperature events program Questionable Status group bits and 4 STAT QUES PTR 18 ENAB 18 Next you must program the Service Request Enable register to recognize both the questionable QUES and the operational OPER summary bits SRE 136 Now when there is a service request read back both the operational and the questionable event registers STAT OPER EVEN QUES EVEN Monitoring Both Phases of a Status Transition You can monitor a status sign
29. Table 7 1 Command Syntax Parameters Query Syntax Related Commands SAV Meaning and Type SAVE Device State Description RST None None PSC State OUTP STAT OFF OUTP PROT DEL OUTP REL STAT OFF OUTP REL POL NORM TRIG SOUR BUS VOLT LEV IMM VOLT LEV TRIG VOLT PROT LEV SAV This command stores the present state of the power supply to the specified location in memory Up to four states can be stored Under certain conditions see Turn On Conditions in Chapter 5 Front Panel Operation location 0 may hold the device state that is automatically recalled at power turn on The following power supply parameters are stored by SAV CURR LEV IMM CURR PROT STAT DIG DATA VAL Command Syntax Parameters Example Query Syntax Related Commands OUTP STAT OUTP REL POL OUTP PROT DEL VOLT LEV IMM OUTP REL STAT VOLT PROT LEV SAV lt NRf gt 0111213 SAV 3 None RCL RST CAUTION The power supply uses nonvolatile memory for recording register states Programs that repeatedly use SAV for recalling states cause frequent write cycles to the memory and can eventually exceed the maximum number of write cycles for the memory Language Dictionary 69 SRE Meaning and Type Service Request Enable Device Interface Description This command sets the condition of the Service Request Enable Register This register determines which bits from the Status Byte Register
30. VWOLT PROT OUTPut PROTection CLEar Optional Headers The use of some headers is optional Optional headers are shown in brackets such as OUTPut STATe ON However if you combine two or more message units into a compound message you may need to enter the optional header This is explained under Traversing the Command Tree Query Indicator Following a header with a question mark turns it into a query VOLT VOLT PROT If a query contains a parameter place the query indicator at the end of the last header VOLT PROT MAX Message Unit Separator When two or more message units are combined into a compound message separate the units with a semicolon STATus OPERation QUEStionable Important You can combine message units only at the current path of the command tree see Traversing the Command Tree Root Specifier When it precedes the first header of a message unit the colon becomes a root specifier This indicates that the command path is at the root or top node of the command tree Note the difference between root specifiers and header separators in the following examples OUTP PROT DEL 1 All colons are header separators OUTP PROT DEL 1 The first colon is a root specifier OUTP PROT DEL 1 VOLT 12 5 The third colon is a root specifier Message Terminator A terminator informs SCPI that it has reached the end of a message Three permitted messages terminators are Newline lt NL gt which is ASCII decimal 10 or he
31. You can set up the GPIB address in one of three ways Front Panel Operation 43 1 As a stand alone unit the only unit at the address It has a primary address in the range of 0 to 30 For example 5 or 7 2 As the direct unit in a serial link It is the only unit connected directly to the GPIB bus The primary address is unique and can be from 0 to 30 It is entered as an integer followed by a decimal separator The secondary address always is 0 which may be added after the primary address If the secondary address is omitted it is assumed to be 0 For example 5 0 or 7 3 As a linked unit in serial link It gets its primary address from the direct unit It has a unique secondary address that can be from to 15 It is entered as an integer preceded by a decimal separator For example l or 12 When you enter a secondary address leading zeros between the decimal separator and the first digit are ignored For example 1 01 and 001 are accepted as secondary address 1 and displayed as 0 01 Zeros following a digit are not ignored Thus 10 and 010 are both accepted as secondary address 10 and displayed as 0 10 Changing the Power supply GPIB Address Use the key and numerical keypad for entering addresses The power supply is shipped with a 5 stand alone address as the default The general procedure for setting an address is Action Display Shows Press Current address Press new address keys New address replaces numbers on the di
32. and Event registers and the NTR and PTR filters STAT PRES This command sets all defined bits in the Status Subsystem PTR registers and clears all bits in the subsystem NTR and Enable registers STAT OPER PTR is set to 1313 and STAT QUES PTR is set to 1555 Command Syntax Parameters Examples Query Syntax Related Commands 78 Language Dictionary STATus PRESet None STAT PRES STATUS PRESET None None Status Operation Registers The bit configuration of all Status Operation registers is shown in the following table See Chapter 8 Status Reporting for more explanation of these registers Bit Configuration of Operation Registers Bit Position Bit Name NU NU CC NU Bit Weight 2048 1024 512 15 12 11 i 9 7 6 5 4 3 2 1 0 WTG NU NU NU NU CAL 128 64 32 16 8 4 2 1 CAL Interface is computing new calibration constants CC The power module is in constant current mode CV The power module is in constant voltage mode NU Not used WTG Interface is waiting for a trigger STAT OPER This query returns the value of the Operation Event register The Event register is a read only register which holds latches all events that are passed by the Operation NTR and or PTR filter Reading the Operation Event register clears it Query Syntax Parameters Returned Parameters Examples Related Commands STAT OPER COND STATus OPERtion EVENt None lt NRI gt Register Value STAT OPER STATUS OP
33. before the protection feature occurred OUTP PROT DEL Sets the time between the programming of an output change that produces a CV CC or UNREG condition and the recording of that condition by the Status Operation Condition register The delay prevents the momentary changes in power supply status that can occur during reprogramming from being registered as events by the status subsystem Since the delay applies to CC status it also delays the OCP overcurrent protection feature The OVP overvoltage protection feature is not affected by this delay Examples Query Syntax Returned Parameters Related Commands OUTP PROT CLE OUTPUT PROTECTION CLEAR OUTPUT PROTECTION DELAY 75E 1 OUTP PROT DEL MIN OUTPUT PROT DELAY MAX OUTP PROT CLE None OUTPut PROTection DELay OUTPut PROTection DELay MIN OUTPut PROTection DELay MAX lt NR3 gt OUTP PROT DEL returns value of programmed delay OUTP PROT DEL MIN and OUTP PROT DEL MAX return the minimum and maximum programmable delays OUTP PROT CLE None OUTP PROT DEL RST RCL SAV Language Dictionary 77 OUTP REL This command is valid only if the power supply is configured for the optional relay connector Programming ON closes the relay contacts programming OFF opens them The relay is controlled independently of the output state If the power supply is supplying power to a load that power will appear at the relay contacts during switching If the power supply is not configured for
34. load connections to the output terminals or bus bars analog connector and digital connector as shown on the rear panel drawing for your model power supply Make controller connections GPIB and serial link as shown in Figure 4 6 at the end of this chapter Load Wire Selection Fire Hazard To satisfy safety requirements load wires must be large enough not to overheat when carrying the maximum short circuit current of the power supply If there is more than one load then any pair of load wires must be capable of safely carrying the full rated current of the unit Table 4 1 lists the characteristics of AWG American Wire Gauge copper wire Table 4 1 Stranded Copper Wire Capacity and Resistance AWG Ampacity Resistance AWG Ampacity Resistance No Q m No Q m NOTES 1 Ampacity is based on 30 C ambient temperature with conductor rated at 60 C For ambient temperature other than 30 C multiply the above ampacities by the following constants Temp C Constant Temp C Constant 21 25 1 08 41 45 0 71 26 30 1 00 46 50 0 58 31 35 0 91 51 55 0 41 36 40 0 82 2 Resistance is nominal at 75 C wire temperature Analog Connector This connector which is on the rear panel is for connecting remote sense leads external current monitors and external programming sources The connector accepts wires sizes from AWG 22 to AWG 12 O Insert Wires Tighten Screws IM
35. lt bool gt lt NRf gt Parameters 0 OFF 11 ON lt NRf gt RST Value OFF Examples CAL STAT 1 4356 CAL STAT OFF Query Syntax CALibrate STATe Returned Parameters Related Commands 011 CAL PASS CAL SAVE CAL VOLT This command is used to calibrate the output voltage The command enters voltage value that you obtain from an external meter If you are entering the voltage value allow time for the DVM to stabilize You must first select a calibration level CAL VOLT LEV for the value being entered Two successive values one for each end of the calibration range must be selected and entered The power supply then computes new voltage calibration constants These constants are not stored in nonvolatile memory until saved with the CAL SAVE command Command Syntax Parameters Default Suffix Examples Query Syntax Related Commands CAL VOLT LEV CALibrate VOLTage DATA lt NRf gt See applicable Output Ratings in Chapter 1 General Information A CAL VOLT 322 5 MV CAL VOLT DATA 3 225 None CAL SAVE CAL STAT This command sets the power supply to a calibration point that is then entered with CAL VOLT DATA During calibration two points must be entered and the low end point MIN must be selected and entered first Command Syntax Parameters Examples Query Syntax Related Commands CAL VOLT PROT CALibrate VOLTage DATA MINIMAX lt CRD gt MINimum MAXimum CAL VOLT LEV MIN CAL V
36. mnemonics must be separated by commas and may be sent in any order but must correspond to the condition that will be enabled Fault conditions can also be enabled by sending the decimal equivalent of the total bit weight of all conditions to be enabled UNMASK NONE disables all conditions from setting bits in the fault register Initial condition UNMASK NONE Compatibility Language 121 Table G 1 ARPS Commands continued ARPS Command Description Similar SCPI Command UNMASK This command reads which bits in the status register have been STAT OPER ENAB enabled as fault conditions The decimal equivalent of the total bit STAT QUES ENAB weight of all enabled bits is returned ESE FAULT This command reads which bits have been set in the fault register STAT OPER A bit is set in the fault register when the corresponding bit in the STAT QUES status register changes from inactive to active AND the ESE corresponding bit in the mask register has been enabled The fault register is reset only after it has been read The decimal equivalent of the total bit weight of all enabled bits is returned SRQ OFF These commands enable or disable the power supply s ability to SRE SRQ 0 request service from the controller for fault conditions UNMASK SR Q ON defines which conditions are defined as faults SRQ 1 Initial condition SRQ OFF SRQ This command reads the SRQ setting SRE CLR This command initializes t
37. pass filter that becomes part of the voltage feedback loop The extra phase shift created by this filter can degrade the unit s stability and result in poor transient response In severe cases this may cause output oscillations To minimize this possibility keep the load leads as short as possible and tie wrap them together In most cases following the above guidelines will prevent problems associated with load lead inductance However if a large bypass capacitor is required at the load and load lead length cannot be reduced then a sense lead bypass network may be needed to ensure stability see Figure 4 4 The voltage rating of the 33 uF capacitors should be about 50 greater than the anticipated load lead drop Addition of the 20 Q resistors will cause a slight voltage rise at the remote sensing points For utmost voltage programming accuracy the unit should be recalibrated with the DVM at the remote sensing points see Appendix B Calibration Note Ifyou need help in solving a stability problem with the power supply contact an Agilent Service Engineer through your local Agilent Sales and Support Office _ BUS BAR BUS BAR P ner Load Leads Remote Sense Points Cl C2 33 uF C3 Load bypass capacitor R1 R2 20 Q 1 Figure 4 4 Sense Lead Bypass Network Operating Configurations Figures 4 5 through Figure 4 8 show the various configurations for connecting to the load Figure 4 9 shows how to connect an externa
38. practical considerations for using these commands are as follows WAI This prevents the power supply from processing subsequent commands until all pending operations are completed If something prevents completion of an existing operation WAI can place the power supply and the controller in a hang up condition OPC This places a in the Output Queue when all pending operations have completed Because it requires your program to read the returned value from the queue before executing the next program statement OPC could prevent subsequent commands from being executed OPC This sets the OPC status bit when all pending operations have completed Since your program can read this status bit on an interrupt basis OPC allows subsequent commands to be executed The trigger subsystem must be in the Idle state in order for the status OPC bit to be true Therefore as far as triggers are concerned OPC is false whenever the trigger subsystem is in the Initiated state However OPC is also false if there are any commands still pending Note For a detailed discussion of WAI OPC and OPC see Device Controller Synchronization Techniques in ANSI IEEE Std 488 2 Programming Examples The examples given here are generic without regard to the programming language or type of GPIB interface Because SCPI commands are sent as ASCII output strings within the programming language statements the SCPI syntax is independent of both programming lang
39. see Chapter 5 Front Panel for more information Press Recall and notice that the output voltage returns to the value stored in location 1 Determining The GPIB Address When the power supply is turned on the display shows ADDR n where n is the power supply GPIB address Any time you want to see the address press address The display will indicate ADDR 5 which is the factory default If the address has been changed then a different number will appear see Setting the GPIB Address in Chapter 5 Front Panel In Case Of Trouble Line Fuse If the power supply appears dead with a blank display and the fan not running first check your power source to be certain line voltage is being supplied to the power supply If the power source is normal the power supply line fuse may be defective If the unit has a defective fuse replace it only once If it fails again investigate the reason for the failure Proceed as follows Hazardous voltage can remain inside the power supply even after it has been turned off Fuse replacement should be done only by qualified electronics personnel 24 Turn On Checkout A The line fuse is located inside the power supply To change it proceed as follows 1 Turn off the front panel power switch and unplug the line cord from the power source 2 Remove the power supply dustcover as follows a Remove the four screws securing the carrying straps and dustcover b Spread the botto
40. short across the output and then enabling or turning the output on Note that the power supply cannot be programmed to operate in a specific mode After initial turn on the operating mode of the unit will be determined by the voltage setting V the current setting I and the load impedance RL In Figure 1 1 operating point 1 is defined by the load line cutting the operating locus in the constant voltage region This region defines the CV mode Operating point 2 is defined by the load line cutting the operating locus in the constant current region This region defines the CC mode Appendix A lists the specifications and supplemental characteristics 26A 30A Figure 1 1 Output Characteristic Curve Output Ranges Figure 1 1 shows two output ranges 80V 26A and 70V 30A The step in the output characteristic indicates that the power supply cannot simultaneously output 80V and 30A No separate command is required to select a range the power supply automatically selects one of the operating ranges based on the last parameter either voltage or current that is programmed For example if you program 80V and 30A the power supply will select the 70V 30A range based on the last parameter that was programmed 30A Downprogramming The power supply can sink current for more rapid down programming in the CV mode This is an uncharacterized current sinking area that provides a limited downprogramming capability 16 General Information
41. supply Status Structure Figure 8 1 shows the status register structure of the power supply The Standard Event Status Byte and Service Request Enable registers and the Output Queue perform standard GPIB functions as defined in the JEEE 488 2 Standard Digital Interface for Programmable Instrumentation The Operation Status and Questionable Status registers implement status functions specific to the power supply Table 8 2 and Figure 8 1 show the bit configuration of each status register Operation Status Group Register Functions The Operation Status registers record signals that occur during normal operation The group consists of the following registers A Condition register that holds real time status of the circuits being monitored Itis a read only register e A PTR NTR positive transistion negative transition Filter that functions as described under STAT OPER NTRIPTR COMMANDS in Chapter 3 Language Dictionary This is a read write register An Event register that latches any condition that is passed through the PTR or NTR filters Reading the Event register clears it An Enable register that functions as described under STAT OPER ENAB in Chapter 3 Language Dictionary This is a read write register The outputs of the Operation Status group are logically ORed into the OPER ation summary bit 7 of the Status Byte register Register Commands Commands that access this group are derived from the STAT OPER comma
42. the Questionable Condition register can set the corresponding bit in the Questionable Event register Note Setting a bit in the PTR or NTR filter can of itself generate positive or negative events in the corresponding Questionable Event register Command Syntax Parameters Suffix Default Value Examples Query Syntax Returned Parameters Related Commands STATus QUEStionable NTRansition lt NRf gt STATus QUEStionable PTRansition lt NRf gt 0 to 32727 None 0 STAT QUES NTR 16 STATUS QUESTIONABLE PTR 512 STAT QUES NTR STAT QUES PTR lt NR1 gt Register value STAT QUES ENAB Language Dictionary 81 System Commands System commands query error messages and software versions and program system language functions SYST ERR This query returns the next error number followed by its corresponding error message string from the remote programming error queue The queue is a FIFO first in first out buffer that stores errors as they occur As it is read each error is removed from the queue When all errors have been read the query returns 0 NO ERROR If more errors are accumulated than the queue can hold the last error in the queue will be 350 TOO MANY ERRORS see Appendix D for other error codes You can use the power supply front panel key to read errors from the queue Errors generated at the front panel are not put into the queue but appear immediately on the display Query Syntax Parameters Returned Pa
43. the instrument in the presence of flammable gases or fumes KEEP AWAY FROM LIVE CIRCUITS Operating personnel must not remove instrument covers Component replacement and internal adjustments must be made by qualified service personnel Do not replace components with power cable connected Under certain conditions dangerous voltages may exist even with the power cable removed To avoid injuries always disconnect power discharge circuits and remove external voltage sources before touching components DO NOT SERVICE OR ADJUST ALONE Do not attempt internal service or adjustment unless another person capable of rendering first aid and resuscitation is present DO NOT EXCEED INPUT RATINGS This instrument may be equipped with a line filter to reduce electromagnetic interference and must be connected to a properly grounded receptacle to minimize electric shock hazard Operation at line voltages or frequencies in excess of those stated on the data plate may cause leakage currents in excess of 5 0 mA peak DO NOT SUBSTITUTE PARTS OR MODIFY INSTRUMENT Because of the danger of introducing additional hazards do not install substitute parts or perform any unauthorized modification to the instrument Return the instrument to an Agilent Technologies Sales and Service Office for service and repair to ensure that safety features are maintained Instruments which appear damaged or defective should be made inoperative and secured against unintended opera
44. to value insufficient to maintain 1100 unit within its CV operating characteristic 1105 CODES CURR TRIG 1 GOSUB 200 1110 1115 Setoperation status mask to detect mode change from CV to CC Hie CODES STAT OPER ENAB 1024 PTR 1024 GOSUB 2000 1125 Remote Programming 59 1130 1135 1140 1146 1150 1160 1165 1170 1175 1180 1186 1190 1195 1200 1205 1210 1215 1220 1225 1230 1235 1240 1245 1250 1255 1260 1265 2000 2005 2010 2015 1250 1255 1260 1265 2000 2005 2010 2015 2020 2100 2105 2110 2115 2120 Programming Some Power supply Functions continued Enable Status Byte OPER summary bit CODES SRE 128 GOSUB 2000 Arm trigger circuit and send trigger to power supply CODES INITIATE TRIGGER GOSUB 2000 Wait for unit to respond to trigger FOR l 1 to 100 NEXT Poll for interrupt caused by change to CC mode and print to screen SPOL 0 CALL IBRSP PS SPOL IF SPOL AND 128 128 THEN POLL 1 Set interrupt flag on OPER bit IF POLL lt gt 1 THEN GOTO 1230 No interrupt to service CODES STAT OPER EVEN GOSUB 2000 Query status oper register CALL IBRD PS OEVENT Read back event bit IF IBSTA lt 0 THEN GOTO 2100 OEVENT VAL OEVENT IF OEVENT AND 1024 1024 THEN PRINT Unit switched to CC mode Clear status circuit CODES CLS GOSUB 2000 FOR l 1TO 50 NEXT Wait for unit to clear Disable
45. voltage and current 1026 OUTPUT 706 VOLTAGE 78 CURRENT 25 11030 1035 Query power supply outputs and print to screen 1040 OUTPUT 706 MEASURE VOLTAGE CURRENT Query output levels 1045 ENTER 706 Vout lout 1050 PRINT The output levels are Vout Volts and lout Amps l 1060 Program current triggered level to a value insufficient to maintain 1065 unit within its CV operating characteristic 1070 OUTPUT 706 CURR TRIG 1 1080 S et operation Status mask to detect mode change from CV to CC 11085 OUTPUT 706 STAT OPER ENAB 1280 PTR 1280 l 1095 Enable Status Byte OPER summary bit 1100 OUTPUT 706 SRE 128 1105 1110 Arm trigger circuit and send trigger to power supply 1115 OUTPUT 706 INITIATE TRIGGER 1130 Poll for interrupt caused by change to CC mode and print to screen 1135 Response SPOLL 706 1140 IF NOT BIT Response 7 THEN GOTO 1130 INO OPER event to report 1145 OUTPUT 706 STAT OPER EVEN Query status operation register 1160 ENTER 706 Oevent Read back event bit vee IF BIT Oevent 10 THEN PRINT Unit switched to CC mode 1160 1165 Clear status 1170 OUTPUT 706 CLS 1176 1180 Disable output and save present state in location 2 1185 OUTPUT 706 OUTPUT OFF SAV 2 1190 END Remote Programming 61 SCPI Confirmed Commands This power supply conforms to Version 1990 0 ABOR CAL STAT SOUR CURR LEV IMM AMPL SOUR CURR LEV IMMI
46. wire connections to the digital connector FRONT INNER COVER INPUT RAIL LEDS 3 HP IB BOARD 4 CONFIGURATION JUMPER FIQ 4 GAL Toa Sd 8 6 4 2 Pin configuration on earlier models 24 68 Fr OOO FLT INH Position Troubleshooting lAs Shipped Digital KO a Position Figure F 4 Digital Port Configuration Jumper Digital Port Functions 115 Digital I O Operation The digital port can be configured see Figure F 4 to provide a digital input output to be used with custom digital interface circuits or relay circuits Some examples are shown Figure F 5 See Figure F 1 for the pin assignments of the mating plug and Appendix A for the electrical characteristics of the port See DIG DATA VAL in Chapter 7 Language Dictionary for information on programming the port The digital port pins are as follows OUT 0 pin 1 This port can only be used as an open collector output It is assigned a bit weight of 1 OUT 1 pin 2 This port can only be used as an open collector output It is assigned a bit weight of 2 IN OUT 2 pin 3 This port can be programmed to be either an input or an open collector output with an internal 4 6 k pull up to 5 V Common pin 4 This pin is the common connection
47. within acceptable range an error occurs CAL ERROR Wait for the power supply to compute the new current calibration constants which will be CAL COMPLETE stored in RAM Notes If CAL DENIED appears then an internal jumper has been set to prevent the calibration from being changed See the Service Manual Tf the active password is lost the calibration function can be recovered by moving an internal jumper that defeats password protection However this also will change all calibration constants to their factory default values For more information see the Service Manual Program the output current to 10 of its rated output Program the output voltage to 10 of its rated output Calibration 99 Recovering From Calibration Problems You can encounter serious calibration problems if you cannot determine a calibration password that has been changed or the power supply is severely out of calibration There are jumpers inside the power supply that permit the calibration password to be defeated and allow the original factory calibration constants to be restored These jumpers are explained in the Service Manual Calibration Error Messages Error messages that can occur during calibration are shown in Table A 3 Table B 3 GPIB Calibration Error Messages Error Meaning Error Meaning No No 1 CAL jumper prevents calibration 6 Wrong CAL command sequence 2 CAL password is incorrect 7 Incorrect st
48. 1 See Appendix A in Operating Manual for calibration commands hee re T OUTPut STATus SYSTem TRIGger CURRent VOLTage STATe PROTection CLEar i ame re RELay OPERation PRESet QUE Stionable ERRor LANGuage VERSIon IMMediate SOURce DC LDC 7 STATe POLarity EVEN CONDition ENABle NTRansition PTRansition EVENt CONDition sENABle NTRansition PTRansition Fig3 2 gal Figure 7 2 Subsystem Commands Tree Diagram ABOR This command cancels any trigger actions presently in process Pending trigger levels are reset equal to their corresponding immediate values ABOR also resets the WTG bit in the Operation Condition Status register see Chapter 8 Status Reporting If INIT CONT ON has been programmed the trigger subsystem initiates itself immediately after ABORt thereby setting WTG ABOR is executed at power turn on and upon execution of RCL or RST Command Syntax Parameters Examples Query Syntax Related Commands ABORt None ABOR None INIT RST TRG TRIG Calibration Commands See Appendix B 72 Language Dictionary Current Subsystem This subsystem programs the output current of the power supply CURR CURR TRIG These commands set the immediate current level or the pending triggered current level of the power supply The immediate level is the current programmed for the output ter
49. 5 mA Current Monitor IM 50 ppm 0 6 mA Typical Common Mode Noise Current rms 500 uA referenced to signal ground binding post p p 4 mA Maximum Input VA and Power with full load 3800 VA 2600 W with no load 100 W AC Input Ranges 200 Vac nominal 174 220 Vac selectable via internal switching 230 Vac nominal 191 250 Vac see Appendix F Frequency 47 63 Hz Below 185 Vac derate output voltage linearly to 75 3 V Output Terminal Isolation 240 Vdc maximum from chassis ground Maximum AC Line Current Ratings 200 Vac nominal 19 Arms 25 A fuse 230 Vac nominal 19 A rms 25 A fuse Maximum Reverse Bias Current With ac input power applied and the dc output reverse biased by an external power supply the unit will continuously withstand without damage a current equal to its output current rating see Table A 1 Remote Sensing Capability Voltage Drop Per Lead Up to 1 2 of rated output voltage Load Voltage Subtract voltage drop in load leads from specified output voltage rating Load Regulation AmV Degradation due to load lead drop in output AmV Vdrop Rsense 10 Degradation due to load lead drop in output AmV Varop Rsense 10 2V drop V raine CV rating 10V where Rgense resistance of sense lead Rgense resistance of sense lead 94 Specifications Table A 2 Supplemental Characteristics continued Parameter l Value Command Processing Time 20 ms Ave
50. 6 EEC including 93 68 EEC and carries the CE Marking accordingly EMC Information ISM Group 1 Class A Emissions As detailed in Electromagnetic Compatibility EMC Certificate of Conformance Number CC TCF 02 020 based on Technical Construction File TCF HPNJ2 dated June 4 2002 Assessed by Celestica Ltd Appointed Competent Body Westfields House West Avenue Kidsgrove Stoke on Trent Straffordshire ST7 1TL United Kingdom Safety Information and Conforms to the following safety standards TEC 61010 1 2001 EN 61010 1 2001 Canada CSA C22 2 No 1010 1 1992 UL 61010B 1 2003 This DoC applies to above listed products placed on the EU market after January 1 2004 CD ues Date Bill Darcy Regulations Manager For further information please contact your local Agilent Technologies sales office agent or distributor or Agilent Technologies Deutschland GmbH Herrenberger StraBe 130 D71034 B blingen Germany Revision B 00 00 Issue Date Created on 11 24 2003 3 23 Document No 6x7y668xA 11 24 doc PM To obtain the latest Declaration of Conformity go to http regulations corporate agilent com and click on Declarations of Conformity Table of Contents as 2 Safety Summary Safety Symbol Definitions Acoustic Noise Information Printing History Declaration Page Table of Contents GENERAL INFORMATION Introduction Safety Considerations Options Accessories Operator Replaceable Parts List Descriptio
51. 80 SRE 128 Assert SRO when the unit switches between CV and CC modes 2 STAT OPER ENAB 1 PTR 1 NTR 1 SRE 128 Assert SRO when the unit enters or leaves calibration mode 3 STAT QUES 3 PTR 3 SRE 128 Assert SRQ when the unit goes into overvoltage or overcurrent condition 4 STAT OPER ENAB 1280 PTR 1280 Assert SRQ under any event occurring in 1 or 3 above STAT QUES 3 PTR 3 SRE 136 Reading Specific Registers You can exercise program control without interrupts by reading specific registers STAT OPER 1280 EVEN Enable only the CV and CC events and read their status STAT OPER ENAB 1313 PTR 1313 EVEN Enable all conditions of the Operation Status register and read any events STAT OPER ENAB EVENT STAT QUES ENAB EVEN ESE ESR Read which events are active and which events are enabled in the Operation Questionable and Standard Event status registers 54 Remote Programming Note The last query string can be handled without difficulty However should you request too many queries the system may return a Query DEADLOCKED error 430 In that case break the long string into smaller parts Programming the Digital I O Port Digital control ports 1 and 2 are TTL outputs that can be programmed either high or low Control port 3 can be programmed to be either a TTL input or a TTL output Send a decimal parameter that translates into the desired straight binary code for these ports See DIG DATA VAL in Chapter 3 Language Dict
52. AMPL 2 SOUR CURR LEV TRIG AMPL SOUR CURR LEV TRIG AMPL SOUR CURR PROT STAT SOUR CURR PROT STAT DISP WIND STAT DISP WIND STAT DISP WIND TEXT DATA DISP WIND TEXT DATA INIT IMM INIT CONT INIT CONT MEAS CURR DC MEAS VOLT DC OUTP STAT OUTP STAT OUTP PROT CLE OUTP PROT DEL OUTP PROT DEL STAT OPER EVEN STAT OPER COND STAT OPER ENAB STAT OPER ENAB STAT OPER NTR STAT OPER NTR STAT OPER PTR STAT OPER PTR STAT PRES STAT QUES EVEN STAT QUES COND STAT QUES ENAB STAT QUES ENAB SYST ERR SYST LANG SYST LANG SYST VERS TRIG STAR IMM See Appendix B Calibration for CAL commands TRIG STAR DEL TRIG STAR DEL TRIG STAR SOUR TRIG STAR SOUR SOUR VOLT LEV IMMI AMPL SOUR VOLT LEV IMM AMPL SOUR VOLT LEV TRIG AMPL SOUR VOLT LEV TRIG AMPL SOUR VOLT PROT LEV SOUR VOLT PROT LEV CLS RCL ESE RST ESE SAV ESR SRE IDN SRE OPC STB OPC TRG PSC TST PSC WAI NON SCPI Commands CAL CURR DATA CAL CURR LEV CAL VOLT LEV CAL VOLT PROT OUTP REL POL OUTP REL POL CAL CURR MON CAL PASS CAL SAV CAL VOLT DATA SOUR DIG DATA VAL SOUR DIG DATA VAL DISP WIND MODE DISP WIND MODE 62 Remote Programming OUTP REL STAT OUTP REL STAT SOUR VOLT PROT AMPL SOUR VOLT PROT AMPL Language Dictionary Introducti
53. Current monitor output VP Voltage programming input IP Differential current programming input IP Differential current programming input Common for VP and IM signals referenced to OUT S remote sense input S__ remote sense input Figure 4 1 Rear Panel Analog Connector IM VP IP IP 4P e te va ge User Connections 27 Note Itis good engineering practice to twist and shield all signal wires to and from the analog and digital connectors Digital Connector This connector which is on the rear panel is for connecting fault inhibit digital I O or relay link signals The connector accepts wires sizes from AWG 22 to AWG 12 Insert Wires Tighten Screws FUNCTION Digital I O Relay Link FLT OUTPUT OUT 0 RLY SEND FLT OUTPUT OUT 1 NOT USED INH INPUT IN OUT 2 RLY RTN INH COMMON COMMON COMMON NOTE Factory default function is FAULT INHIBIT Figure 4 2 Rear Panel Digital Connector Connecting the Power supply to the Load Output Isolation The output of the power supply is isolated from earth ground Either output terminal may be grounded or an external voltage source may be connected between either output and ground However both output terminals must be kept within 240 Vdc of ground An earth ground terminal is provided on the rear panel for convenience such as grounding wire shields The earth ground terminal on the rear panel is a low noise signal ground for co
54. ERATIOBAL EVENT CLS STAT OPER NTR STAT OPER PTR This query returns the value of the Operation Condition register That is a read only register which holds the real time unlatched operational status of the power supply Query Syntax Parameters Examples Returned Parameters Related Commands STAT OPER ENAB STATus OPERation CONDition None STAT OPER COND STATUS OPERATION CONDITION lt NR1 gt Register value None This command and its query set and read the value of the Operational Enable register This register is a mask for enabling specific bits from the Operation Event register to set the operation summary bit OPER of the Status Byte register This bit bit 7 is the logical OR of all the Operational Event register bits that are enabled by the Status Operation Enable register Command Syntax Parameters Suffix Default Value Examples Query Syntax Returned Parameters Related Commands STATus OPERation ENABle lt NRf gt 0 to 32727 None 0 STAT OPER ENAB 1312 STAT OPER ENAB 1 STATUS OPERATION ENABLE STATus OPERation ENABle lt NR1 gt Register value STAT OPER EVEN Language Dictionary 79 STAT OPER NTR STAT OPER PTR These commands set or read the value of the Operation NTR Negative Transition and PTR Positive Transition registers These registers serve as polarity filters between the Operation Enable and Operation Event registers to cause the following actions When a bit in the Op
55. NT 76 MEAS CURR MEAS VOLT 76 OUTP 77 OUTP PROT CLE OUTP PROT DEL 77 OUTP REL 78 OUTP REL POL 78 STAT OPER COND 79 STAT OPER ENAB 79 STAT OPER NTR STAT OPER PTR 80 STAT OPER 79 STAT PRES 78 STAT QUES COND 81 STAT QUES ENAB 81 STAT QUES NTR STAT QUES PTR 81 STAT QUES 80 SYS ERR 82 SYS LANG 82 SYS VERS 82 TRIG 83 TRIG SOUR 83 VOLT PROT 84 VOLT VOLT TRIG 83 suffixes 51 support rails 18 system errors 111 system keys shift 39 Address 39 44 55 Error 39 Local 39 Recall 39 Save 39 temperature range 18 trigger continuous 53 initiate 53 single 53 triggering the output 53 turn on conditions 43 types of SCPI commands 46 jo unregulated operation 42 ae value coupling 48 verification current programming 109 current readback 109 equipment 107 test record 110 test setup 107 voltage programming 108 voltage readback 108 voltage programming 40 53 voltage sensing local 30 voltage sensing remote 30 VP 27 VXIplug amp play 13 20 warranty 2 wire capacity 27 wire resistance 27 wire size 27 writing to the display 54 Index 127 Agilent Sales and Support Offices For more information call your local Agilent sales office listed in your telephone directory or an Agilent regional office listed below for location of your nearest sales support office United States of America Agilent Technologies Company Test and Measurement Organizat
56. OLT LEV MAX None CAL VOLT DATA CAL STAT This command calibrates the overvoltage protection OV circuit It takes several seconds to complete The output voltage must be calibrated before this procedure is performed Also the power supply output must be enabled and operating in the constant voltage CV mode If present the optional relay accessory must either be disconnected or set to the off open state The power supply automatically performs the calibration and stores the new OV constant in nonvolatile memory Command Syntax Parameters Example Query Syntax Related Commands 102 Calibration CALibrate VOLTage PROTection None CAL VOLT PROT None CAL STAT BASIC Calibration Program The following program can be run on any controller operating under Agilent BASIC The assumed power supply address is 5 and calibration password is 4356 If required change these parameters in the appropriate statements 10 Agilent BASIC Calibration Program 20 30 DIM Resp 255 Err_msg 255 40 50 Volt_cal Voltage DAC calibration 60 Err_found 0 70 PRINT TABXY 5 10 CONNECT INSTRUMENTS AS SHOWN IN FIG A 1 1 Then Press Continue 80 PAUSE 90 CLEAR SCREEN 100 110 Assign power supply GPIB address 120 130 ASSIGN Ps TO 705 140 150 Initialize power supply 160 170 OUTPUT Ps RST OUTPUT ON iso 190 Password is optional only required if set to non zero value
57. OPERATING amp PROGRAMMING GUIDE Agilent Model E4356A Telecommunications DC Power Supply 4 ge Agilent Technologies Agilent Part No 5964 8166 Microfiche No 5964 8167 Printed in Malaysia September 2004 CERTIFICATION Agilent Technologies Company certifies that this product met its published specifications at time of shipment from the factory Agilent Technologies further certifies that its calibration measurements are traceable to the United States National Bureau of Standards to the extent allowed by the Bureau s calibration facility and to the calibration facilities of other International Standards Organization members WARRANTY This Agilent Technologies hardware product is warranted against defects in material and workmanship for a period of three years from date of delivery Agilent Technologies software and firmware products which are designated by Agilent Technologies for use with a hardware product and when properly installed on that hardware product are warranted not to fail to execute their programming instructions due to defects in material and workmanship for a period of 90 days from date of delivery During the warranty period Agilent Technologies Company will at its option either repair or replace products which prove to be defective Agilent Technologies does not warrant that the operation of the software firmware or hardware shall be uninterrupted or error free For warranty service with the exception of warranty op
58. P REL STAT in Chapter 7 For more information about the Relay Accessory refer to its manual see Table 1 4 A a Figure F 6 Relay Link Connections Digital Port Functions 117 Compatibility Language Introduction This power supply is programatically compatible with the Agilent 603xA Series AutoRanging Power Supplies ARPS This means that you can program this power supply over the GPIB using the ARPS commands Software that you have written for the autoranging power supplies can also be adapted to program this power supply Note The Agilent E4356A Power supply s serial link is not supported by ARPS commands You can use only a GPIB primary address for the power supply To switch from SCPI commands to ARPS commands and vice versa use the SYST LANG command This command is documented in Chapter 7 Table G 1 summarizes the ARPS commands that program the supplies You will need to refer to the Series 603xA power supply manual see Table 1 4 for complete information on the ARPS commands Some of the ARPS commands are similax to SCPI commands but others are unique to ARPS For example the ARPS FOLD commands have no function with the Agilent E4356A power supplies Similarly there are some SCPI commands that have no ARPS function Parallel Polling When programmed for parallel polling and Compatibilty Language power supplies operating under the Agilent BASIC system can hang up the GPIB when the system
59. REMOVED INSTALL A NEW COVER Figure 4 3 Rear Panel Output Connections Inductive Loads Inductive loads provide no loop stability problems in CV mode However in CC mode inductive loads will form a parallel resonance network with the power supply s output capacitor Generally this will not affect the stability of the unit but it may cause ringing of the current in the load Ringing will not occur if the Q quality factor of the parallel resonant network is lt 1 0 Use the following formula to determine the Q of your output oe M E R intt Re xt C where C model dependent internal capacitance see below L inductance of the load Rext equivalent series resistance of the load Rin model dependent internal resistance see below C 7 000 uF Rin 14mQ If the Q is greater than 0 5 inductive loads will ring with the output capacitance and will be damped according to the following equation t 3 sin wty 1 5 Battery Charging The power supply s OVP circuit has a downprogrammer FET that discharges the power supply output whenever OVP trips If a battery or other external voltage source is connected across the output and the OVP is inadvertently triggered or the output is programmed below the battery voltage the power supply will sink current from the battery To avoid this insert a reverse blocking diode in series with the output of the unit Connect the diode cathode to the battery terminal and the diode a
60. Regulation Voltage 0 002 3 mV change in output voltage or current for Current 0 005 2 mA any load change within ratings Line Regulation Voltage 0 002 3 mV change in output voltage or current for Current 0 005 2 mA any line change within ratings Transient Response Time lt 900 us for the output voltage to recover to its previous level within 0 1 of the rated voltage or 20 mV whichever is greater following any step change in load current up to 50 of the rated current Specifications 93 Table A 2 Supplemental Characteristics for Agilent E4356A Parameter Value Output Programming Range Voltage 81 9 V Current 30 71 A Overvoltage Protection 96 V Typical Programming Resolution Voltage 20 mV Current 7 5 mA Overvoltage Protection 150 mV Accuracy Overvoltage Protection OVP 1 5 V 25 C 5 C Analog Programming VP 0 3 Analog Programming IP 7 Current Monitor IM 7 Drift Temperature Stability Voltage 0 02 2 5 mV following a 30 minute warmup change Current 0 02 10 mA in output over eight hours under constant line load and ambient temperature Temperature Coefficients Voltage 50 ppm 1 6 mV change per C after 30 minute warmup Current 75 ppm 4 mA Voltage Readback 60 ppm 1 6 mV Current Readback 85 ppm 5 mA Overvoltage Protection OVP 200 ppm 18 mV Analog Programming VP 60 ppm 0 7 mV Analog Programming IP 275 ppm
61. STAT QUES NTR Programming 0 or STAT PRES Event None STAT QUES EVEN Reading or CLS Enable STAT QUES ENAB lt NRf gt STAT QUES ENAB Programming 0 Standard Event Status Group Register Functions This group consists of an Event register and an Enable register that are programmed by common commands The Standard Event Status Event register latches events relating to interface communication status see Table 8 1 It is a read only register that is cleared when read Read query ESR Cleared by CLS ESR The Standard Event Status Enable register functions similarly to the enable registers of the Operation and Questionable status groups Register Commands The common ESE command programs specific bits in the Standard Event Status Enable register Because the power supply implements PSC the register is cleared at power on if PSC 1 ESR reads the Standard Event Status Event register and reading the register clears it Programmed by ESE lt NRf gt Read query ESE Cleared by ESE 0 Status Reporting 89 Status Byte Register This register summarizes the information from all other status groups as defined in the IEEE 488 2 Standard Digital Interface for Programmable Instrumentation standard The bit configuration is shown in Table 8 1 The register can be read either by a serial poll or by STB Both methods return the same data except for bit 6 Sending STB returns MSS in bit 6 while poring the register ret
62. TECHNOLOGIES SHALL NOT BE LIABLE FOR ANY DIRECT INDIRECT SPECIAL INCIDENTAL OR CONSEQUENTIAL DAMAGES WHETHER BASED ON CONTRACT TORT OR ANY OTHER LEGAL THEORY ASSISTANCE The above statements apply only to the standard product warranty Warranty options extended support contracts product maintenance agreements and customer assistance agreements are also available Contact your nearest Agilent Technologies Sales and Service office for further information on Agilent Technologies full line of Support Programs Safety Summary The following general safety precautions must be observed during all phases of operation service and repair of this instrument Failure to comply with these precautions or with specific warnings elsewhere in this manual violates safety standards of design manufacture and intended use of the instrument Agilent Technologies Company assumes no liability for the customer s failure to comply with these requirements GENERAL This product is a Safety Class 1 instrument provided with a protective earth terminal Any LEDs used in this product are Class 1 LEDs as per IEC 825 1 This ISM device complies with Canadian ICES 001 Cet appareil ISM est conforme la norme NMB 001 du Canada ENVIRONMENTAL CONDITIONS With the exceptions noted all instruments are intended for indoor use in an installation category II pollution degree 2 environment They are designed to operate at a maximum relative humidity of 95 and at
63. V or CC Dis The power supply output is disabled OCP The overcurrent protection function is enabled Prot A protection circuit has caused the power supply to shut down Press to determine the reason Err An error has been generated as a result of remote operation Press to display the error code Cal The power supply is in calibration mode Shift The shift key has been pressed Rmt The power supply is in the remote mode controlled over the GPIB Addr The power supply is addressed to listen or talk SRQ The power supply is requesting service from the controller Output Rotary Controls Voltage Rotate clockwise to increase output voltage or program setting Use to rapidly set an approximate output value see and keys Current Rotate clockwise to increase output current or program setting Use to rapidly set an approximate current value see and keys 38 Front Panel Operation Table 5 1 Front Panel Conirols and Indicators continued SYSTEM Keys defeated by a lock out command over the GPIB Press to display the power supply s GPIB address You can change the address with the ENTRY keys Use to display error codes generated during remote operation Select by pressing Shift Address Use to restore a previously saved power supply state Use ENTRY keys 0 through 4 to specify which location to recall Select by pressing Recall Note Location 0 may contain the power supply turn on stat
64. aai Connect the power cord to the power supply Turn the front panel power switch to ON 1 3 The power supply undergoes a self test when you turn it on If the test is normal the following sequence appears on the LCD The GPIB address factory default is 5 This is then followed by PWR ON INIT for approximately 10 seconds 4 The display then goes into the meter mode with the Dis annunciator on and all others off Meter mode means that the VOLTS digits indicate the output voltage and the AMPS digits indicate the output current These values will be at or near zero Verify that the power supply fan is on by placing your hand near the rear grill to feel the air flow You may also be able to hear the fan operating Press Output on off once The Dis annunciator will go off and the CV annunciator will go on N n fon Note If the power supply detects an error during self test the display will show an error message Go to In Case of Trouble at the end of this chapter Turn On Checkout 21 Using the Keypad Shifted Keys Some of the front panel keys perform two functions one labeled in black and the other in blue You access the blue function by first pressing the blue key which is not labeled When the Shift annunciator is on you will know you have access to the key s shifted blue function Backspace Key The key is an erase key If you make a mistake entering a number and have not yet ent
65. al for both its positive and negative transitions For example to generate RQS when the power supply either enters the CC constant current condition or leaves that condition program the Operational Status PTR NTR filter as follows STAT OPER PTR 1024 NTR 1024 STAT OPER ENAB 1024 SRE 128 The PTR filter will cause the OPER summary bit to set RQS when CC occurs When the controller subsequently reads the event register STAT OPER EVEN the register is cleared When CC subsequently goes false the NTR filter causes the OPER summary bit to again set RQS 92 Status Reporting A Specifications Specifications are performance parameters warranted over the specified temperature range Supplemental Characteristics are not warranted but are descriptions of performance determined either by design or type testing Table A 1 Performance Specifications for Agilent E4356A Parameter Value Output Ratings Voltage 0 80 V 0 to 26A 0 to 45 C Current 0 30 A Oto 70 V Programming Accuracy Voltage 0 04 80 mV 25 C 5 C Current 0 1 25 mA Ripple amp Noise Constant Voltage rms 2 mV from 20 Hz to 20 MHz with outputs ungrounded Constant Voltage p p 16 mV or with either output terminal grounded Constant Current rms 25 mA measured with 60 cm leads Readback Accuracy Voltage 0 05 120 mV from front panel or over GPIB with respect to Current 0 1 35 mA actual output 25 C 5 C Load
66. altitudes of up to 2000 meters Refer to the specifications tables for the ac mains voltage requirements and ambient operating temperature range BEFORE APPLYING POWER Verify that the product is set to match the available line voltage and the correct fuse is installed GROUND THE INSTRUMENT To minimize shock hazard the instrument chassis and cabinet must be connected to an electrical ground The instrument must be connected to the ac power supply mains through a three conductor power cable with the third wire firmly connected to an electrical ground safety ground at the power outlet For instruments designed to be hard wired to the ac power lines supply mains connect the protective earth terminal to a protective conductor before any other connection is made Any interruption of the protective grounding conductor or disconnection of the protective earth terminal will cause a potential shock hazard that could result in personal injury If the instrument is to be energized via an external autotransformer for voltage reduction be certain that the autotransformer common terminal is connected to the neutral earthed pole of the ac power lines supply mains FUSES Only fuses with the required rated current voltage and specified type normal blow time delay etc should be used Do not use repaired fuses or short circuited fuseholders To do so could cause a shock or fire hazard DO NOT OPERATE IN AN EXPLOSIVE ATMOSPHERE Do not operate
67. ate CV CC for this command 3 CAL mode is not enabled 4 Incorrect computed readback constants 5 Incorrect computed programming This is a hardware disable See the power supply constants Service Manual Calibration Over The GPIB You can calibrate the power supply by using SCPI commands within your controller programming statements Be sure you are familiar with calibration from the front panel before you calibrate from a controller The SCPI calibration commands are related to the front panel calibration controls as follows Front Panel Corresponding SCPI Front Panel Corresponding SCPI Command Command Command Command CAL STAT ONI1 lt password gt CAL CURR LEV MINIMAX CAL CURR DATA lt NRf gt CAL STAT OFFI 0 CAL CURR MON lt newline gt CAL CURR DATA lt NRf gt Pass CAL PASS lt NRf gt CAL SAVE Pass CAL VOLT LEV MINIMAX CAL VOLT DATA lt Nrf gt CAL VOLT PROT Calibration Example A sample calibration program is given at the end of this appendix If your system is Agilent BASIC you can use the program with very little modification Otherwise use it as a guide for writing your own program 100 Calibration Calibration Language Dictionary The calibration commands are listed in alphabetical order The format for each command follows that shown in Chapter 7 Calibration error messages that can occur during GPIB calibration are shown in Table B 3 CAL CURR This command
68. ble IBERR Be sure to check IBSTA after every function call If it is not equal to zero branch to an error handler that reads IBERR to extract the specific error Error Handling If there is no error handling code in your program undetected errors can cause unpredictable results This includes hanging up the controller and forcing you to reset the system Both of the above DOS drivers have routines for detecting program execution errors Important Use error detection after every call to a subroutine Agilent BASIC Controllers The Agilent BASIC Programming Language provides access to GPIB functions at the operating system level This makes it unnecessary to have the header files required in front of DOS applications programs Also you do not have to be concerned about controller hangups as long as your program includes a timeout statement Because the power supply can be programmed to generate SRQ on errors your program can use an SRQ service routine for decoding detected errors The detectable errors are listed in Table D 1 in Appendix D Sample Program Code The following programs are intended only to show how some of the same power supply functions can be programmed to each of the three previously mentioned GPIB interfaces The first two are for the DOS interfaces and the third for the Agilent BASIC interface Remote Programming 57 Programming Some Power supply Functions SAMPLE FOR POWER SUPPLY AT STAND ALONE ADDRESS 6
69. ble the output by pressing Output On Ot The Dis annunciator will turn on Now try to program a current greater than the Imax for your unit Note that the display shows OUT OF RANGE Front Panel Operation 41 Programming Overcurrent Protection When enabled overcurrent protection removes the power supply output whenever it goes into CC operation This prevents the unit from indefinitely uniting the full programmed current to the load Setting The OCP Protection To activate overcurrent protection press OCP The OCP annunciator will light and power supply will continue to operate normally until it is forced into CC operation If that occurs the OCP circuit will trip and the power supply will remove its output Checking OCP Operation The easiest way to check this operation at any specified current is to increase the load current beyond the programmed current value and if necessary decrease the programmed voltage This will force the power supply into CC mode see Figure 1 1 When OCP trips the Prot annunciator will light and the output will drop to zero There is now no power supply output due to an overcurrent condition To verify this press and observe that the display indicates OC Clearing The OCP Condition With the OCP tripped return to the meter mode and try to clear the condition by pressing Prot Clear Nothing will appear to happen because the reason for the condition has not been removed Thus as soon as the circuit is
70. circuitry The controller can be made aware of the fault via a service request SRQ generated by the Questionable Status summary bit see Chapter 8 Status Reporting in the Programming Guide Note The INH input cannot be used to disable outputs set from the external voltage programming port B Exaraple with Multiple Suppiles Figure F 3 Examples of FLT Outputs 114 Digital Port Functions Changing The Port Configuration As shipped from the factory the digital port is configured for FLT INH operation You can change the configuration of the port to operate as a general purpose digital input output port to control your custom circuitry as shown in Figure F 4 To change the port configuration you must move a jumper on the GPIB board Shock Hazard Hazardous voltage can remain inside the power supply even after it has been turned off This procedure should only be done by qualified electronics service personnel Proceed as follows 1 Turn off the power supply and disconnect the power cord from the power source 2 Remove the four screws that secure the two carrying straps and outer cover 3 Spread the bottom rear of the cover and pull it back to disengage it from the front panel 4 Slide the outer cover back to expose the top of the GPIB board 5 Refer to Figure F 4 and use needle nose pliers to move the jumper to the Digital I O position 6 Replace the outer cover and secure the carrying straps 7 Make the necessary
71. ck mounting kit CAUTION This power supply requires instrument support rails for non stationary installations These are normally ordered with the cabinet and are not included with the rack mounting kits Temperature Performance A variable speed fan cools the unit by drawing air through the sides and exhausting it out the back Using Agilent rack mount or slides will not impede the flow of air The temperature performance is as follows The unit operates without loss of performance within the temperature range of 0 C to 45 C Input Power Source Do not apply power to the power supply until directed to do so in Chapter 3 CAUTION Check the line abel on the rear of your unit and verify that the voltage shown there corresponds to the nominal line voltage of your power source If it does not see Appendix E Line Voltage Conversion for instructions on changing the power supply s line voltage configuration Note This product requires single phase input voltage er source or from the line to line voltage of a label Figure 2 2 See AC Input Ratings in Table A 2 for the voltage and frequency range for each type of power source You can operate your unit from a nominal 200 V or a 230 V single ph 208 volt 3 phase source The proper source is indicated on the rear Note The power source must be a dedicated line with no other devices drawing current from it The line fuse is located inside the power supply Table 1 4 iden
72. cleared it trips again You can clear the OC condition by m Increasing the load resistance to lower the output current below the programmed current value or m By raising the programmed current to a value above that required by the load Clear the fault by either of the above methods Then clear the OCP circuit by pressing Prot Clear The Prot annunciator will go off and the output will be restored to normal If desired you can also restore the output by disabling the OCP function press to turn off the OCP annunciator This restores the output but does not clear any condition that may have caused OCP to trip Note Under certain conditions the OCP circuit may fail to clear because load demand occurs before the power supply has time to build up the required output current capacity In such cases disable the output press before clearing the OCP circuit After OCP is cleared then enable the power supply output CV Mode vs CC Mode Once you program a voltage Vs and a current Is in Figure 1 1 the power supply will try to maintain itself in either CV or CC mode depending on the impedance of the load R1 If the load demands less current than I operation will be in CV mode with the voltage maintained at V The output current will be at some value below I as determined by Vs Ry If the current increases beyond Is see Rr2 the unit will switch to CC mode by varying its output voltage to maintain a constant current value of
73. crete fault indicator DFI operation See Fault Inhibit Operation in Appendix F for wiring information and Questionable Status Group in Chapter 8 for programming information Connecting Units in Series Floating voltages must not exceed 240 Vdc No output terminal may be more than 240 V from chassis ground Figure 4 8 shows how power supplies can be connected in series for higher voltage output Series connections are straightforward in this case Program each power supply independently If two units are used in the series configuration program each unit for 50 of the total output voltage Set the current limit of each unit to the maximum that the load can handle without damage Each power supply has a reverse voltage protection diode across its output If a reverse voltage is applied the unit cannot control the current conducted through this diode To avoid damaging the unit never connect it in such a way that a reverse voltage can force it to conduct current in excess of the unit s maximum reverse diode current see Table A 2 User Connections 33 Load Connection Analog Connector Load Program each unit for full load current and 1 2 the load voltage eConnect for remote sensing optional WARNING FLOATING VOLTAGES MUST NOT EXCEED 240 VDC NO OUTPUT TERMINAL MAY BE MORE THAN 240 V FROM CHASSIS GROUND Figure 4 8 Series Connection Remote Sensing Optional External Voltage Control The setup shown in Figur
74. de Note If one of the entered values is not within acceptable range an error occurs The power supply is now holding the new voltage calibration constants in RAM CAL ERROR Calibrating the OVP Trip Point 1 Make certain the voltage has been calibrated and there is no load on the power supply Meter mode 2 Select OVP calibration by pressing OVCal OVPCAL 3 Wait for the power supply to compute the OVP calibration constant CAL COMPLETE If the unit goes unregulated or into CC mode during OVP calibration an error occurs NOT CV MODE If the computed constant is out of acceptable range an error occurs DOES NOT CAL The power supply is now holding the new OVP calibration constant in RAM Entering Current Calibration Values 1 Make certain appropriate shunt resistor see Table A I is the only load on the power supply Meter mode 2 Select the first calibration point by pressing i IRDG1 If the power supply is not in CC mode an error occurs WRONG MODE 3 Wait for DVM reading to stabilize Then read DVM and compute the first current value Meter mode DVM reading shunt resistance 4 Use Entry keypad to enter the first current value Meter mode 5 Select second calibration point by pressing again a d 6 Wait for DVM reading to stabilize Then read DVM and compute the second Meter made current value DVM reading shunt resistance 7 Use Entry keypad to enter the second current value Meter mode Note If the entered value is not
75. digital connector 17 28 115 digital I O 28 digital I O programming 55 digital port configuration 117 dimensions 18 direct unit 35 43 55 display text 54 DOS drivers 57 downprogramming 16 entry keys lt backspace 39 TCurrent 39 TVoltage 39 0 9 39 equivalent series resistance 29 error handling 57 error messages calibration 102 checksum 26 power on 25 runtime 26 selftest 25 system 111 example programs 57 external voltage control 34 F fan 18 fault inhibit 28 FLT indicator 90 FLT output 115 front panel 37 annunciators 38 function keys Current 39 OCP 39 124 Index Ouptut On Off 39 OV 39 Prot Clear 39 Protect 39 Voltage 39 fuse location 25 replacing 25 ground earth 13 guide user s 13 header 49 long form 49 short form 49 history 5 GPIB capabilities 46 command library for MS DOS 45 controller programming 45 references 45 GPIB address 24 43 55 assigning in programs 56 changing 44 55 J IM 27 IN OUT 2 118 inductive loads 29 INH common 115 INH indicator 90 INH input 115 initial conditions 40 input connections 18 power 14 rating 18 inspection 17 installation VXIplug amp play 20 IP 27 IP 27 language dictionary 63 line connections 3 phase 18 line fuse 18 line select switch 113 line voltage conversion 113 linked connections 35 linked unit 35 43 55 load battery 29 load capacitive
76. e See Turn on operation in this chapter Use to save the power supply s present state to nonvolatile memory Select by pressing Recall Use ENTRY keys to specify the location where you want to store the state Use locations 0 through 4 This unlabeled blue key is the Shift key Press to access the shifted alternate key functions When the power supply is under remote control press to enable local operation This control can be Function Keys Press to enable or disable the power supply output This key toggles between the two states The disabled state programs the output to the RST voltage and current settings Press to display the output voltage setting After pressing Voltage you may use the ENTRY keys to change the value Press to display the output current setting After pressing Current you may use the ENTRY keys to change the value Press to display the OV trip voltage setting After pressing OV you may use the ENTRY keys to change the value When the Prot annunciator is on press to see which protection circuit caused the power supply to shut down Response can be OC overcurrent OT overtemperature or OV overvoltage If no protection circuit has tripped the display will show dashes Press this key to reset the protection circuit Zf the condition that caused the circuit to trip has been removed the Prot annunciator will go off Press to enable or disab
77. e 4 9 allows an external dc voltage to program the power supply output A voltage applied to the voltage programming input programs the output voltage and a voltage applied to the current programming input programs the output current See Figure 4 1 for an explanation of these programming input connections Wiring Considerations The input impedance of the analog input is over 30 KQ If the output impedance of your programming source is not negligible with this programming errors will result Larger output impedances result in proportionally greater errors 1 Voltage programming source 0 to 4 15V 2 Differential current programming source 0 to 6 75 V 3 Differential current programming source 0 to 6 75 V 4 Current programming source floating 0 to 6 75 V Maximum Potential between IP and JP is 15 V Figure 4 9 Analog Programming Connections 34 User Connections Programming Note from Figure 4 1 that you have three options for programming the current You can use a voltage source that is positive negative or floating with respect to Common P Do not exceed 15 V with respect to Common P Make certain that the common connection for your voltage programming source is isolated from the CAUTION load Failure to do this may cause damage to the power supply The effect of the analog programming source is always summed with the values programmed over the GPIB or from the front panel The voltage source can act alone only if you
78. e 8 1 To avoid noise pickup use coaxial cable or shielded pairs for the test leads Programming the Power supply Appendix A lists the programming voltage and current ranges Enter the appropriate values from the front panel The programming procedures assume you know how to operate the power supply from the front panel see Chapter 5 Front Panel Operation Order of Tests Perform the following tests for operation verification Test 1 must be done first followed by Tests 2 and 3 in any order 1 Turn on Checkout 2 Voltage Programming and Readback Accuracy 3 Current Programming and Readback Accuracy Turn on Checkout Perform the Turn on Checkout as directed in Chapter 3 Turn on Checkout Note The power supply must pass turn on selftest before you can proceed with these tests Voltage Programming and Readback Accuracy This test verifies that the voltage programming GPIB readback and front panel display functions are within specifications Figure C 1 1 shows the setup for the tests Measure the dc output voltage directly at the sense connections of the output terminals or bus bars Connect the output as shown Table C 2 Voltage Programming and Readback Accuracy Tests Action Normal Result 1 Turn off the power supply and connect a DVM across the sense terminals see Figure C 1 1 2 Turn on the power supply with no load and program the output CV annunciator on Output current near 0 for 0 volts and maximu
79. e header path you may insert them anywhere in the message VOLT TRIG 7 5 INIT TRG OUTP OFF RCL 2 OUTP ON SCPI Queries Observe the following precautions with queries Remember to set up the proper number of variables for the returned data e Set the program to read back all the results of a query before sending another command to the power supply Otherwise a Query Interrupted error will occur and the unreturned data will be lost Value Coupling Value coupling results when a command directed to send one parameter also changes the value of a second parameter There is no direct coupling among any power supply SCPI commands However be aware that until they are programmed unititialized trigger levels will assume their corresponding immediate levels For example if a power supply is powered up and VOLT LEV is programmed to 6 then VOLT LEV TRIG will also be 6 until you program it to another value Once you program VOLT LEV TRIG to another value it will remain at that value regardless of how you subsequently reprogram VOLT LEVEL 48 Remote Programming Types of SCPI Messages There are two types of SCPI messages program and response A program message consists of one or more properly formatted SCPI commands sent from the controller to the power supply The message which may be sent at any time requests the power supply to perform some action e A response message consists of data in a specific SCPI format sent from the power su
80. e output terminals The pending triggered level is a stored voltage value that is transferred to the output terminals when a trigger occurs A pending triggered level is unaffected by subsequent VOLT commands and remains in effect until the trigger subsystem receives a trigger or an ABORt command is given If there is no pending VOLT TRIG level then the query form returns the VOLT level In order for VOLT TRIG to be executed the trigger subsystem must be initiated see INITiate Language Dictionary 83 Command Syntax Parameters Default Suffix RST Value Examples Query Syntax MAX Returned Parameters Related Commands VOLT PROT SOURce VOLTage LEVel MMediate AMPLitude lt NRf gt SOURce VOLTage LEVel TRIGgered AMPLitude lt NRf gt Table 7 1 V Table 7 1 VOLT 200 MA VOLTAGE LEVEL 200 MA VOLTAGE LEVEL IMMEDIATE AMPLITUDE 2 5 VOLT TRIG 20 VOLTAGE LEVEL TRIGGERED 20 SOURce VOLTage LEVel IMMediate AMPLitude SOURce VOLTage LEVel IMMediate AMPLitude SOURce VOLTage LEVel IMMediate AMPLitude MIN SOURce VOLTage LEVel TRIGgered AMPLitude SOURce VOLTage LEVel TRIGgered AMPLitude MAX SOURce VOLTage LEVel TRIGgered AMPLitude MIN lt NR3 gt VOLT and VOLT TRIG return presently programmed immediate and triggered levels If not triggered level is programmed both returned values are the same VOLT MAX and VOLT MIN return the maximum and minimum programmable im
81. e range of this device 223 Too much data out of memory block string or expression too long 240 Hardware error device dependent 241 Hardware missing device dependent 310 System error device dependent 313 Calibration memory lost out of calibration due to memory failure 330 Self test failed more specific data after 350 Queue overflow errors lost due to too many errors in queue 400 Query error generic query error 410 Query INTERRUPTED query followed by DAB or GET before response complete 420 Query UNTERMINATED addressed to talk incomplete programming message received 430 Query DEADLOCKED too many queries in command string 440 Query UNTERMINATED query received after query for indefinite response 110 Error Messages Line Voltage Conversion SHOCK HAZARD Hazardous voltage can remain inside the power supply even after it has been turned off This procedure should only be done by qualified electronics service personnel Line voltage conversion is accomplished by setting a line voltage select switch Proceed as follows 1 Turn off the ac power and disconnect the power cord from the power source 2 Remove the four screws securing the carrying straps and dustcover 3 Spread the bottom rear of the dustcover and pull it back to disengage it from the front panel 4 Slide the dustcover back far enough to expose the line select switch see Figure E 1
82. eadback You do not have to do a complete calibration each time If appropriate you may calibrate only the voltage or current and proceed to Saving the Calibration Constants Test Setup Figure B 1 shows the test setups required for voltage and current calibration for each power supply series Calibration 97 Front Panel Calibration Eight shifted keys and the Entry keypad are used for calibration functions see Chapter 5 for explanations of shifted keys and the Entry keypad The following procedures assume you understand how to operate front panel keys Entering the Calibration Values Follow the steps in Table B 2 for entering calibration values Saving the Calibration Constants CAUTION Storing calibration constants overwrites the existing ones in nonvolatile memory If you are not absolutely sure you want to permanently store the new constants omit this step The power supply calibration will then remain unchanged To replace any existing calibration constants with ones you have just entered press Cal Save CAL SAVED then appears on the display Disabling the Calibration Mode To disable the calibration mode press Cal Disable The display will return to meter mode with the Cal annunciator off Changing the Calibration Password The factory default password is the model number of your unit such as E4356A You can change the calibration password only when the power supply is in the calibration mode which requires you t
83. ecksum error by writing to the EEPROM while the power supply is in the calibration mode To do this proceed as follows 1 Enable the calibration mode by pressing Shift Cal Enable Q Enter 2 PASWD will appear on the display 3 Press the number keys corresponding to the password followed by Enter The Cal annunciator will go on Note On new equipment the calibration password corresponds to the four digit model number such as OO D See Appendix A Calibration for more information about the calibration password 4 Save any operating state for example press Shift Save Enter 5 Turn the power off and then back on A normal display free of error messages should appear If not the power supply requires service Runtime Error Messages Under unusual operating conditions the VOLT or AMPS display may show OL or OL This indicates that the output voltage or current is beyond the range of the meter readback circuit Table 3 4 shows other error messages that may appear at runtime l Table 3 4 Runtime Errors Display Meaning Display Meaning EE WRITE ERR EEPROM status timeout UART FRAMING UART byte framing error SBUB FULL Message too long for buffer UART OVERRUN Overfilled UART receive buffer SERIAL DOWN Failed communication with front UART PARITY UART byte parity error panel STK OVERFLOW Front panel stack overflow 26 Turn On Checkout User Connections Rear Panel Connections Make application
84. ect primary address and a secondary address Assigning the GPIB Address In Programs The following examples assume that the GPIB select code is 7 the the power supply is 6 and that the power supply address will be assigned to the variable PS 1000 Stand alone address The power supply will respond if it is set to 6 1010 PS 706 Statement for Agilent 82335A Interface 1010 ASSIGN PS TO 706 Statement for Agilent BASIC Interface 1020 Direct address The power supply will respond if it is set to 6 or 6 0 1030 PS 70600 Statement for Agilent 82335A Interface 1030 ASSIGN PS TO 70600 Statement for Agilent BASIC Interface 1040 Linked address 1 The power supply will respond if it is set to address 1 and is serially connected to a unit at direct address 6 0 1050 PS 706 01 Agilent 82335A Interface 1090 ASSIGN PS TO 706 01 Agilent BASIC Interface For systems using the National Instruments DOS driver the address is specified in the software configuration program IBCONFIG EXE and assigned a symbolic name The address then is referenced only by this name within the application program see the National Instruments GP IB documentation 56 Remote Programming DOS Drivers Types of Drivers The Agilent 82335A and National Instruments GPIB are two popular DOS drivers Each is briefly described here See the software documentation supplied with the driver for more details Agilent 82335A Driver For GW BASIC programming the
85. ed 1 oc The power module overcurrent 4 MAV Message Available summary bit protection circuit has tripped 4 OT The power module has an 5 ESB Event Status summary bit overtemperature condition 9 RI The power module remote inhibit state 6 MSS Master Status summary bit is active RQS Request Service bit 10 UNR The power module output is 7 OPER Operation status summary bit unregulated QUESTIONABLE STATUS CONDITION PTR NTR EVENT ENABLE OV oc NU g oT ipa S 3 FLT a UNR NY SERVICE STATUS REQUEST STANDARD EVENT STATUS OUTPUT QUEUE er BYTE ENABLE EVENT ENABLE OPC g N U 2 QYE 5 DDE z 3 EXE g 9 Questionable Status Group Register Functions The Questionable Status registers record signals that indicate abnormal operation of the power supply As shown in Figure 8 1 the group consists of the same type of registers as the Status Operation group The outputs of the Questionable Status group are logically ORed into the QUES tionable summary bit 3 of the Status Byte register Register Commands Programming for this group is derived from the STAT QUES commands described in Chapter 7 Language Dictionary and summarized in Table 8 3 Table 8 3 Status Questionable Commands Register Command Query Cleared By Condition None STAT QUES COND Cannot be cleared PTR Filter STAT QUES PTR lt NRf gt STAT QUES PTR Programming 0 NTR Filter STAT QUES NTR lt NRf gt
86. ede either command with a colon there is an implied colon in front of every root level command If you enter STATUS the active header path moves one colon to the right The interface is now ready to accept OPERATION PRESET or QUESTIONABLE as the next header Note that you must include the colon because it is required between headers If you next enter OPERATION the active path again moves one colon to the right The interface is now ready to accept EVENT CONDITON ENABLE NTRANSITION or PTRANSITION as the next header If you now enter ENABLE you have reached the end of the command string The active header path remains at ENABLE If you wished you could have entered ENABLE 18 PTRANSITION 18 and it would be accepted The entire message would be STATUS OPERATION ENABLE 18 PTRANSITION 18 The message terminator after PTRANSITION 18 returns the path to the root The Effect of Optional Headers If a command includes optional headers the interface assumes they are there For example if you enter STATUS OPERATION the interface recognizes it as STATUS OPERATION EVENT This returns the active path to the root STATUS But if you enter STATUS OPERATION EVENT then the active path remains at EVENT This allows you to send STATUS OPERATION EVENT CONDITION in one message If you tried to send STATUS OPERATION CONDITION the command path would send STATUS OPERATION EVENT and then return to STATUS instead of to CONDITION
87. en the appropriate event registers are read see Chapter 8 Status Reporting for more information The MAV bit is cleared at power on or by CLS A serial poll also returns the value of the Status Byte register except that bit 6 returns Request for Service RQS instead of Master Status Summary MSS A serial poll clears RQS but not MSS When MSS is set it indicates that the power supply has one or more reasons for requesting service Bit contiguret on of Status Byte Register 3 Bit Position 7 6 ee OE BitWeight 128 64 ESB Event status byte summary MAV Message available MSS Master status summary OPER Operation status summary QUES Questionable status summary RQS Request for service Also represents RQS These bits are always zero 70 Language Dictionary Query Syntax STB Returned Parameters lt NRI gt Register binary value Related Commands None TRG Meaning and Type Trigger Device Trigger Description This command generates a trigger when the trigger subsystem has BUS selected as its source The command has the same affect as the Group Execute Trigger lt GET gt command Command Syntax TRG Parameters None Query Syntax None Related Commands ABOR CURR TRIG INIT TRIG IMM VOLT TRIG lt GET gt TST Meaning and Type Test Device Test Description This query causes the power supply to do a self test and report any errors see Selftest Error Messages in Chapte
88. enerated to the controller Inhibit Fault Indicator The remote inhibit INH and discrete fault FLT indicators are implemented through their respective INH and FLT connections on the rear panel Refer to Appendix F for more information RI Remote Inhibit Whenever a remote inhibit signal is received at the digital port see Appendix F Digital Port Functions the power supply will receive an RI event at the Questionable Status register By programming the status subsystem you may use RI to generate a service request SRQ to the controller and or to create a DFI output at the digital port By using RI DFI in this way you can chain the power supplies to create a serial shutdown in response to the INH input DFI Discrete Fault Indicator Whenever a fault is detected in the power supply it is capable of generating a FLT signal at the digital port see Appendix F Digital Port Functions The source for the DFI signal can be any Questionable Operation or Standard Event status event see Figure 8 1 90 Status Reporting Initial Conditions At Power On Status Registers When the power supply is turned on a sequence of commands initializes the status registers For the factory default RST power on state Table 8 4 shows the register states and corresponding power on commands Table 8 4 Default Power On Register States Register Condition Caused By Operation PTR Questionable PTR All bits 1 STAT PRE Operation NTR Qu
89. eration As shipped from the factory the digital port is configured to provide a fault indicator FLT output and a remote INH input Unplug the mating plug to make the connections After you have finished making all connections plug the wired plug back into the connector FLT Output Used to indicate that a fault has occurred in power supply Pins and 2 are the open collector output of an optocoupler with pin 1 the collector and pin 2 the emitter When a fault has iis kand 2 occurred pin is driven low with respect to pin 2 negative true INH Input pin 3 Used to shut down the power supply output Pin 3 is a high impedance input The unit shuts down when this input is driven low negative true This can be done by shorting pin 3 to pin 4 INH Common pin 4 Provides the common connection for the INH input Three examples are provided to show how to use the FLT INH circuits of your power supply Use twisted wire connections to reduce or prevent EM in all cases If shielded wire is used connect only one end of the shield to the chassis signal ground binding post to prevent ground loops In Figure F 2 the INH input is connected to a switch that shorts pin 3 to pin 4 whenever it is necessary to externally disable the output of the unit This will activate the remote inhibit RI fault protection circuit causing the front panel Prot annunciator to come on It also sets the RI event bit in the unit s Questionable Status Event register
90. eration NTR register is set to 1 then a 1 to 0 transition of the corresponding bit in the Operation Condition register causes that bit in the Operation Event register to be set e When a bit of the Operation PTR register is set to 1 then a 0 to 1 transition of the corresponding bit in the Operation Condition register causes that bit in the Operation Event register to be set If the same bits in both NTR and PTR registers are set to 1 then any transition of that bit at the Operation Condition register sets the corresponding bit in the Operation Event register e If the same bits in both NTR and PTR registers are set to 0 then no transition of that bit at the Operation Condition register can set the corresponding bit in the Operation Event register Note Setting a bit in the value of the PTR or NTR filter can of itself generate positive or negative events in the corresponding Operation Event register Command Syntax STATus OPERtion NTRansition lt NRf gt STATus OPERtion PTRansition lt NRf gt Parameters 0 to 32727 Suffix None Default Value 0 Examples STAT OPER NTR 32 STAT OPER PTR 1312 Query Syntax STAT OPER NTR STAT OPER PTR Returned Parameters lt NRI gt Register value Related Commands STAT OPER ENAB Status Questionable Registers Bit Configuration of Questionable Registers _ Bit Position 15 11 10 9 8 7 6 5 4 3 2 1 0 Condition NU UNR RI NU NU NU NU OT NU NU OC OV Bit Weight 1024 512 256 128 64 32 16 8 4 2 1 NU
91. ered it have not pressed Enter you can delete the number by pressing You may delete as many numbers as you wish by repeatedly pressing this key Output Checkout Important When the power supply is turned on it asserts the state stored in EEPROM memory location 0 For a new unit this is the factory default RST state The following procedures assume that the factory default state is still in location 0 Turn On Conditions in Chapter 5 for details Checking the Voltage Function The tests in Table 3 1 check the basic voltage functions with no load connected to the power supply The VOLTS display will show various readings Ignore the AMPS display Table 3 1 Checking the Voltage Functions Output Terminals Open Procedure Display Explanation Output Terminals Open or Connected to a Voltmeter If Dis is on turn it off by pressing Press key VOLT 0 000 Default voltage setting CV annunciator should be on If CC annunicator is on increase the current by pressing Current one or more times until CC turns off and CV turns on Press 4 O VOLT 40 Program output to 40 volts Press 40 00 Enter the voltage Meter mode displays output voltage During these tests there may be a small relative to full output AMPS reading that will be ignored Press Voltage several times Voltage decreases several millivolts each time you press the key Press the same Voltage increases several millivolts each time you press the k
92. estionable NTR All bits 0 STAT PRE Operation Event Questionable Event All bits 0 CLS Operation Enable Questionable Enable All bits 0 STAT PRE Standard Event Status Enable All bits 0 ESE 0 Status Byte All bits 0 CLS Status Request Enable All bits 0 SRE 0 Output Queue Cleared CLS If PSC 1 If PSC 0 then the last previous state before turn on is recalled The value of PSC is stored in nonvolatile memory The PON Power On Bit The PON bit in the Standard Event register is set whenever the power supply is turned on The most common use for PON is to generate an SRQ at power on following an unexpected loss of power To do this bit 7 of the Standard Event Enable register must be set so that a power on event registers in the ESB Standard Event Summary Bit Also bit 5 of the Service Request Enable register must be set to permit an SRQ to be generated The commands to accomplish these two conditions are ESE 128 SRE 32 If PSC is programmed to 0 the contents of the Standard Event Enable and Service RequestEnable registers are saved in nonvolatile memory and recalled at power on This allows a PON event to generate SRQ at power on Programming PSC to 1 prevents these registers from being saved and they are cleared at power on This prevents a PON event from generating SRQ at power on Status Register Programming Examples Note These examples are generic SCPI commands See Chapter 6 Remote Programming fo
93. ey number of times The number of millivolts change is determined by the voltage programming resolution of your power supply see Appendix A Supplemental Characteristics Rotate Voltage control first Control operates similarly to Voltage and Voltage keys The control counterclockwise and then is rate sensitive Turning it more quickly causes a more rapid change clockwise in voltage Press alo 40 00 Program output to 40 volts Press Display shows default OVP overvoltage protection trip voltage for your unit see Appendix A Supplemental Characteristics 22 Turn On Checkout Press 8 0 OV 30 Program the OVP to 30 volts which is less than the output voltage Press Enter 0 000 OVP voltage entered is less than the output voltage This causes the OVP circuit to trip The output drops to zero CV turns off and Prot turns on Press OV eke that the power supply shuts down because the OVP circuit has tripped Press Return display to meter mode optional step Press ae 0 000 Program the OVP to 45 volts which is greater than the output voltage Note You cannot clear an OVP trip until you have first removed the cause of the condition Press Prot Clear 40 00 The OVP circuit is cleared restoring the output Prot turns off and Shift Protect CV turns on Shift is the unlabeled blue key Checking the Current Function The tests in Table 3 2 check the basic current functions with a
94. fety Considerations information Drivers are available on the web at www ag com go drivers Chapter 2 This power supply is a Safety Class instrument which means it has a protective earth terminal That terminal must be connected to earth ground through a power source equipped with a 3 wire ground receptacle Refer to the Safety Summary page at the beginning of this guide for general safety information Before installation or operation check the power supply and review this guide for safety warnings and instructions Safety warnings for specific procedures are located at appropriate places in the guide General Information 13 Options Table 1 2 List of Options Option Description i O 230 Power cord 4 mm harmonized without plug 909 Rack mount kit with handles Agilent 5062 3983 Support rails E3663A are required Accessories Table 1 3 List of Accessories GPIB cable all models 0 5 meters 1 6 ft 10833D 1 0 meter 3 3 ft 10833A 2 0 meters 6 6 ft 10833B 4 0 meters 13 2 ft 10833C Serial link cable 2 0 meters 6 6 ft 5080 2148 Accessory slide mount kit 1494 0059 Operator Replaceable Parts List Table 1 4 Operator Replaceable Parts List Description Agilent Part Description Agilent Part No No Cable assembly GPIB see Table 1 3 Power cord assembly see Table 1 2 Cable assembly serial link see Table 1 3 Rack mount kit see Table 1 2 Collar rotary output control 5040 1700
95. for the Digital I O ports External pull up to 5 V 16 5 V Max required for pins 1 amp 2 Digital Output Ports 0 1 2 A ERAEN Coil Current aaia 0 25 A Max TTL AS CMOS HC NOTE Connectors Relay Driver y aa aro romiovable AAE Ports 0 1 2 Digital Intput Supply contains Port 2 NH FLT S 43 2 1 internal clamp diodes 7 7 f7 Z ZOOR 5 wie for inductive flyback l A 4321 rg LZ pi C26 I p A Relay Circuits B Digital Interface Circuits Figure F 5 Digital I O Port Applications Relay Link Operation The digital port can be configured to provide relay control outputs for the Agilent 59510A or 59511A Relay Accessory Refer to Figure F 1 for the pin assignments of the mating plug Not used with units that output more than 50 amps CAUTION p p RLY SEND pin 1 Provides the serial data to control the relays in the Relay Accessory pin 2 is not used RLY RTN pin 3 Receives the data readback that indicates the status of the relays in the Relay Accessory Common pin 4 Common connection for the RLY SEND and RLY RTN lines 116 Digital Port Functions Figure F 6 shows how to connect your power supply to an Agilent 59510A or 59511A Relay Accessory when the digital port is configured for relay link operation An error will be generated if you attempt to program the relay box without first configuring the digital port for relay link operation For more information about programming the relay refer to OUT
96. gered levels they default to the programmed immediate output levels The following statements shows some basic trigger commands OUTP OFF Disable the output VOLT LEV IMM 22 TRIG 25 Program the immediate voltage level to 22V and the pending triggered level to 25 V CURR LEV IMM I5 TRIG 25 Program the immediate current level to 15 A and the pending triggered level to 25 A VOLT LEV IMM TRIG CURR LEV IMM TRIG Check all the programmed values OUTP ON Enable the output MEAS VOLT CURR Read back the immediate levels from the sense terminals INIT TRIG Arm the trigger circuit and send a single trigger INIT TRG Same as above except using a common command MEAS VOLT CURR Read back the triggered levels from the sense terminals If you need to send two or more triggers program the trigger circuit for continuous arming OUTP OFF Disable the output VOLT LEV IMM 50 TRIG 25 Program the immediate voltage level to 50 V and the pending triggered level to 25 V INTIT CONT ON Program the trigger circuit for continuous arming OUTP ON Enable the output to 50 V TRIG Trigger the output voltage to 25 V VOLT TRIG 50 TRIG Set the pending trigger level to 50 V and trigger the output voltage back to 50 V INTIT CONT OFF Remove the continuous triggger arming Saving and Recalling States Remote Programming 53 You can remotely save and recall operating states See SAV and RCL in Chapter 7 Language Dictionary for the para
97. he power supply to the power on state RST It also resets the PON bit in the serial poll register The command performs the same function as the Device Clear DCL interface message ERR This command determines the type of programming error detected SYST ERR by the unit A remote programming error sets the ERR bit in the status register which can be enabled by UNMASK to request service TEST This command causes the power supply to run selftest and report TST any detected failures This command causes the power supply to report its model number IDN and any options that affect the unit s output SYST LANG This command causes the alternate language to become active and SYST LANG to be stored in nonvolatile memory In this case the commands are equivalent After being shut off the power supply will resume in the last selected language when power is restored The parameter must be either COMP or TMSL not SCPI 122 Compatibility Language Index lt bool gt 51 lt NRI gt 51 lt NR2 gt 51 lt NR3 gt 51 lt NRf gt 51 lt NRfs gt 51 AARD 51 accessories 14 active header path 47 airflow 18 analog connector 17 analog connector 27 annunciators Addr 38 AMPS 38 Cal 38 CC 38 CV 38 Dis 38 Err 38 OCP 38 Prot 38 Rmt 38 Shift 38 SRQ 38 Unr 38 42 VOLTS 38 Arps commands 122 auto parallel connections 32 auto parallel programming 33 AWG wire size 27 R
98. installed Query Syntax OPT Returned Parameters lt AARD gt PSC Meaning and Type Power on Status Clear Device Initialization Description This command controls the automatic clearing at power turn on of The Service Request Enable register The Standard Event Status Enable register If the command parameter then the above registers are cleared at power turn on If the command parameter 0 then the above registers are not cleared at power turn on but are programmed to their last state prior to power turn on This is the most common application for PSC and enables the power module to generate an SRQ Service Request at power on Language Dictionary 67 Command Syntax PSC lt bool gt Parameters 0111OFFION Example PSCO PSC 1 Query Syntax PSC Returned Parameters lt NRI gt 011 Related Commands ESE SRE CAUTION PSC causes a write cycle to nonvolatile memory If PSC is programmed to 0 then the ESE and SRE commands also cause a write cycle to nonvolatile memory The nonvolatile memory has a finite number of write cycles see Table A 2 Supplementary Characteristics Programs that repeatedly write to nonvolatile memory can eventually exceed the maximum number of write cycles and may cause the memory to fail RCL Meaning and Type Recall Device State Recalling a previously stored state may place hazardous voltage at the power supply output Description This command restores the power su
99. ion 5301 Stevens Creek Blvd Bldg 51L 5C Santa Clara CA 95052 8059 800 452 4844 Asia Pacific Agilent Technologies Asia Pacific Ltd 17 21 F Shell Tower Time Square 1 Matheson Street Causeway Bay Hong Kong 852 2599 7070 Australia New Zealand Agilent Technologies Australia Ltd 31 41 Joseph Street Blackburn Victoria 3130 Australia 131 347 ext 2902 Canada Agilent Technologies Canada Ltd 5150 Spectrum Way Mississauga Ontario L4W 5Gl 905 206 4725 Europe Agilent Technologies European Marketing Centre P O Box 999 1180 AZ Amstelveen The Netherlands Japan Yokogawa Agilent Technologies Ltd Measurement Assistance Center 9 1 Takakura Cho Hachioji Shi Tokyo 192 Japan 81 426 48 3860 Latin America Agilent Technologies Latin American Region Headquarters 5200 Blue Lagoon Drive 9th Floor Miami Florida 33126 U S A 305 267 4245 4220 Manual Updates The following updates have been made to this manual since the print revision indicated on the title page 3 01 00 All references to HP have been changed to Agilent All references to HP IB have been changed to GPIB 9 17 04 The declarations page has been updated 5 13 09 A URL has been added to the declarations pages to obtain the latest declaration of conformity Option 841 has been removed from page 14 as it is no longer available Corrections have been made to Figure F 5
100. ionary for the port bit configurations DIG DATA 3 Set ports I and 2 high and make 3 another output port DIG DATA 7 Set ports I and 2 high and make 3 an input port DIG DATA Read back the present port configuration System Considerations The remainder of this chapter addresses some system issues concerning programming These are power supply addressing and the use of the following types of GPIB system interfaces 1 HP Vectra PC controller with Agilent 82335A GPIB Interface Command Library 2 IBM PC controller with National Instruments GPIB PCII Interface Handler 3 Agilent controller with Agilent BASIC Language System Setting the GPIB Address The power supply address cannot be set remotely it must be set from the front panel Once the address is set you can assign it inside programs Figure 4 10 shows the ways the power supply can be connected to the GPIB bus You can set up the GPIB address in one of three ways 1 Asa stand alone unit the only unit at the address It has a primary address in the range of 0 to 30 For example 5 or 7 2 As the direct unit in a serial link It is the only unit connected directly to the GPIB bus The primary address is unique and can be from 0 to 30 It is entered as an integer followed by a decimal separator The secondary address always is 0 which may be added after the primary address If the secondary address is omitted it is assumed to be 0 For example 5 0 or 7 3 As a linked unit in
101. is turned on This can occur under the following conditions e The controller uses CS80 Protocol for an external disk drive for example the Agilent 9133D e The external disk drive and the power supply have the same select code and that code is 7 or less e The external disk drive and power supply addresses are binary complements of each other e g 0 amp 7 1 amp 6 etc When the system is turned on the power supply accesses the GPIB before the controller and prevents it from accessing the external disk drive The solution is to change one of the GPIB addresses or to ensure that the power supply is not turned on until after the controller has completed its selftest and has control of the GPIB Compatibility Language 119 Table G 1 ARPS Commands DLY xS DLY xMS OUT OFF OUT 0 OUT ON OUT 1 voltage or current is implemented or an RST OUT ON or CLR command is received During the delay the CV CC and CR conditions cannot be reported as faults and foldback protection is disabled This command reads the delay time setting These commands enable or disable the power supply output The disabled state programs the output to relatively low voltage and current values The unit will be able to implement commands even while the output is disabled Initial condition OUT ON OUTP STAT OFF OUTP STAT 0 OUTP STAT ON OUTP STAT 1 OUTP PROT DEL ARPS Command De
102. is used to calibrate the output current The command enters current value that you obtain from an external meter If you are entering the current value allow time for the DVM to stabilize You must first select a calibration level CAL CURR LEYV for the value being entered Two successive values one for each end of the calibration range must be selected and entered The power supply then computes new current calibration constants These constants are not stored in nonvolatile memory until saved with the CAL SAVE command Command Syntax Parameters Default Suffix Examples Query Syntax Related Commands CAL CURR LEV CALibrate CURRent DATA lt NRf gt See applicable Output Ratings specification in Chapter 1 General Information A CAL CURR 32 33 A CAL CURR DATA 5 00 None CAL SAVE CAL STAT This command sets the power supply to a calibration point that is then entered with CAL CURR DATA During calibration two points must be entered and the low end point MIN must be selected and entered first Command Syntax Parameters Examples Query Syntax Related Commands CAL PASS CALibrate CURRent LEVel MINIMAX lt CRD gt IMINimum MA Ximum CAL CURR LEV MIN CAL CURR LEV MAX None CAL CURR DATA CAL STAT This command enters a new calibration password The command is active only when the power supply is already in the calibration mode Unless it is changed subsequently to shipment the password is the power sup
103. ital I O Operation Relay Link Operation G COMPATIBILITY LANGUAGE Introduction Parallel Polling INDEX AGILENT SALES AND SUPPORT OFFICES 105 105 105 106 106 106 106 106 106 107 109 109 109 109 111 113 113 113 115 116 116 119 119 119 123 131 11 General Information Introduction The following Getting Started Map will help you find the information you need to complete the specific task that you want to accomplish Refer to the table of contents or index of each guide for a complete list of the information contained within Table 1 1 Getting Started Map Task General information Capabilities and characteristics Where to find information Chapter 1 Installing the unit Location Line connections Checking out the unit Verifying proper operation Using the front panel Chapter 2 Chapter 3 Making Connections Load connections Computer connections Application Information Using the front panel Front panel keys Front panel examples Chapter 4 Chapter 5 Using the programming interface GPIB interface SCPI commands SCPI programming examples SCPI language dictionary Programming the unit using SCPI and COMPatibility commands Chapter 6 Chapters 7 and 8 for SCPI commands Appendix G for COMPatibility commands Installing the Agilent VXI plug amp play instrument driver NOTE The driver must be installed on your pc to access the on line Sa
104. l digital plug see Table 1 4 that connects to the back of the unit Digital connections are connector described in Appendix D Digital Port Functions Serial cable A 2 meter cable see Accessories in Chapter 1 that connects to the control bus next to the GPIB connector This cable is used to serially connect multiple power supplies as described under Controller Connections in Chapter 4 Output Output hardware screws with nuts and lockwashers for securing your load wires to the output bus bars hardware see Table 1 4 Guide change If applicable change sheets may be included with this guide If there are change sheets make the page indicated corrections in this guide Installation 17 Location and Temperature Bench Operation The Table A 2 in Appendix A gives the dimensions of your power supply The cabinet has plastic feet that are shaped to ensure self alignment when stacked with other Agilent System II cabinets The feet may be removed for rack mounting Your power supply must be installed in a location that allows sufficient space at the sides and rear of the cabinet for adequate air circulation Minimum clearances are inch 25 mm along the sides Do not block the fan exhaust at the rear of the unit Rack Mounting The power supply can be mounted in a standard 19 inch rack panel or cabinet Rack mounting kits are available as Option 908 or 909 with handles Installation instructions are included with each ra
105. l voltage source for analog programming Connecting One Power supply to a Single Load Figure 4 5 shows how to connect a single power supply to one load Keep output load leads close together small loop area to obtain a low inductance and low impedance connection to the load If you wish to use remote sensing connect the sense leads at the load as shown in the figures User Connections 31 FI 0 40 08 Load Connection Load Analog Connector Connect for remote sensing optional eConnect for local sensing default Figure 4 5 Single Load Connection Remote Sensing Optional Connecting One Power supply To Multiple Loads Figure 4 6 shows how to connect a single power supply to more than one load When connecting multiple loads to the power supply with local sensing connect each load to the output bus bars with separate connecting wires This minimizes mutual coupling effects and takes full advantage of the unit s low output impedance Keep each pair of load wires as short as possible and twist or bundle them to reduce lead inductance and noise pickup OLoads Load Connection Analog Connector Connect for remote sensing optional eConnect for local sensing default Figure 4 6 Multiple Load Connection Remote Sensing Optional Connecting Units in Auto Parallel Figure 4 7 illustrates how power supplies can be connected in auto parallel for increased current output You can connect up to five units of the same model
106. le the power supply OCP trip circuit This key toggles between the two states which are indicated by the OCP annunciator ENTRY Keys Press to increment the output voltage in the CV mode or to increase the voltage setting after you have pressed the key pressed the key Press to increment the output current in the CC mode or to increase the current setting after you have pressed the key Press to decrement the output current in the CC mode or to decrease the current setting after you have pressed the key Press to select numerical values Press to enter a minus sign Press to delete the last keypad entry Use this key to remove one or more incorrect digits before they are entered Press to decrement the output voltage in the CV mode or to decrease the voltage setting after you have These four entry keys operate in two modes Press and release for a single minimal change as determined _by the programming resolution see Table A 2 Press and hold for an increasingly rapid output change Press to delete an entire keypad entry and return to the meter mode Use this key to exit from a value before it is entered Press to enter a value or to accept an existing value and return the display to the meter mode The remaining shifted keys are for calibration see Appendix B Calibration Front Panel Operation 39 Programming The Output Important These instructions show how to prog
107. lity 31 repacking 17 replaceable parts 14 reverse protection diode 33 RI remote inhibit 90 RLY RTN 118 RLY SEND 118 root specifier 50 runtime errors 26 S 27 S 27 safety symbol 4 warning 3 safety class 13 safety warning 13 saving states 43 54 SCPI command completion 52 command tree 46 common commands 46 conformance 62 Index 125 data format 51 header path 47 message structure 49 message types 49 message unit 49 multiple commands 47 non conformance 62 program message 49 queries 48 references 45 response message 49 subsystem commands 46 72 secondary address 44 55 selftest errors 25 serial cable 17 series connections 33 service request 91 programming 92 service request enable register 90 servicing status events 92 shift function 37 38 single load connections 31 slave unit 32 specifications 95 SRQ events detecting 54 SRQ service request 91 stand alone connections 35 standard event status group 89 status bit CAL 88 CC 88 CME 88 CV 88 DDE 88 ESB 88 EXE 88 MAV 88 MSS 88 90 OC 88 OPC 88 OPER 88 OT 88 OV 88 PON 88 91 QUES 88 QYE 88 RI 88 RQS 88 90 UNR 88 WTG 88 status byte register 90 status registers 87 configuration 88 subsystem commands ABOR 72 CURR PROT STAT 73 CURR CURR TRIG 73 DIG DATA 74 DISP 74 DISP MODE 75 126 Index DISP TEXT 75 INIT INIT CO
108. lone Connections Linked Connections 5 FRONT PANEL OPERATION Introduction Getting Acquainted Programming The Output Establishing Initial Conditions Programming Voltage Programming Overvoltage Protection Programming Current Programming Overcurrent Protection CV Mode vs CC Mode Unregulated Operation Saving and Recalling Operating States Turn On Conditions Setting The GPIB Address Types of Power supply GPIB Addresses Changing the Power supply GPIB Address 6 REMOTE PROGRAMMING Prerequisites for Remote Programming External Documents SCPI References GPIB References GPIB Capabilities of the Power supply 25 26 26 Introduction To SCPI Conventions Types of SCPI Commands Traversing the Command Tree Active Header Path The Effect of Optional Headers Moving Among Subsystems Including Common Commands SCPI Queries Value Coupling Types of SCPI Messages Structure of a SCPI Message SCPI Data Formats Numerical Data Boolean Data Character Data SCPI Command Completion Programming Examples Programming Voltage and Current Programming Protection Circuits Changing Outputs by Trigger Saving and Recalling States Writing to the Display Programming Status Detecting Events via SRO Reading Specific Registers Programming the Digital I O Port System Considerations Setting the GPIB Address Changing the Power supply GPIB Address Assigning the GPIB Address In Programs DOS Drivers Types of Drivers Error Handling Agilent BASIC Controlle
109. lt Indicator Initial Conditions At Power On Status Registers The PON Power On Bit Status Register Programming Examples Determining the Cause of a Service Interrupt Servicing an Operation Status Mode Event Adding More Operation Events Servicing Questionable Status Events Monitoring Both Phases of a Status Transition A SPECIFICATIONS B CALIBRATION Introduction Equipment Required General Procedure Parameters Calibrated Test Setup Front Panel Calibration Entering the Calibration Values Saving the Calibration Constants Disabling the Calibration Mode Changing the Calibration Password Recovering From Calibration Problems Calibration Error Messages Calibration Over The GPIB Calibration Example Calibration Language Dictionary CAL CURR CAL CURR LEV CAL PASS CAL SAVE CAL STAT CAL VOLT CAL VOLT LEV CAL VOLT PROT BASIC Calibration Program C VERIFICATION Introduction 10 102 102 102 103 105 105 Test Equipment Required List of Equipment Current Monitoring Resistor Performing The Tests General Measurement Techniques Programming the Power supply Order of Tests Turn on Checkout Voltage Programming and Readback Accuracy Current Programming and Readback Accuracy D ERROR MESSAGES Power supply Hardware Error Messages Calibration Error Messages System Error Messages E LINE VOLTAGE CONVERSION F DIGITAL PORT FUNCTIONS Digital Connector Fault Inhibit Operation Changing The Port Configuration Dig
110. m programmable triggered current levels Related Commands For CURR SAV RCL RST For CURR TRIG ABOR CURR RST CURR PROT STAT This command enables or disables the power supply overcurrent protection OCP function If the overcurrent protection function is enabled and the power supply goes into constant current operation then the output is disabled and the Questionable Condition status register OC bit is set see Chapter 8 Status Reporting An overcurrent condition can be cleared with the OUTP PROT CLE command after the cause of the condition is removed Command Syntax SOURce CURRent PROTection STATe lt bool gt Parameters 0111OFFION RST Value OFF Examples CURR PROT STAT0 CURRENT PROTECTION STATE OFF CURR PROT STAT 1 CURRENT PROTECTION STATE ON Query Syntax SOURce CURRent PROTection STATe Returned Parameters lt NRI gt Oor Related Commands OUTP PROT CLE RST Language Dictionary 73 Digital Subsystem This subsystem programs the control port on the back of the power supply when it is configured for Digital I O operation DIG DATA This command sets and reads the power supply digital control port when that port is configured for Digital I O operation Configuring of the port is done via an internal jumper see Appendix F The port has three signal pins and a digital ground pin Pins 1 and 2 are output pins controlled by bits O and 1 Pin 3 is controlled by bit 3 and can be programmed to serve either as an input or an outpu
111. m programmable current 3 Record voltage readings at DVM and on front panel display Readings within Low Voltage limits see applicable Subtract or add the specified readback limit to the actual test table output values 4 Program voltage to full scale 5 Record voltage readings of DVM and on front panel display Readings within High Voltage limits see applicable Subtract or add the specified readback limit to the actual test table output values 106 Verification Current Programming and Readback Accuracy This test verifies that the current programming and readback are within specification Connect the appropriate current monitoring resistor see Table C 1 as shown in Figure C 1 2 The accuracy of the resistor must be as specified in the table Table C 3 Current Programming and Readback Accuracy Test Action Normal Result 1 Turn off the power supply and connect the current monitoring resistor as shown in Figure C 1 2 Be certain to use wire of sufficient size to carry the maximum rated current of the unit see Table 7 1 in Chapter 7 2 Connect a DVM across the resistor at the monitoring terminals 3 Turn on the power supply and program the output for 5V OA 4 Disable the output 6 Observe the DVM voltage reading Divide this by the resistance of the current monitor resistor Record the result as the Low Current value in applicable test table table Value within specified readback limits
112. m rear of the dustcover and pull it back to disengage it from the front panel c Slide the dustcover back far enough to expose the line fuse 1 3 Observe the input rail LED under the RFI shield see Figure E 3 in Appendix E If the LED is on there is still hazardous voltage inside the unit Wait until the LED goes out this may take several minutes before proceeding 4 Connect a dc voltmeter across test points TPI and TP2 Figure E 3 It may be necessary to remove the RFI shield in order to reach these test points The shield is secured by four screws on each side When the voltmeter indicates 60 volts or less it is safe to work inside the power supply 5 Replace the fuse with one of the same type see Table 1 4 in Chapter 1 Do not use a slow blow type fuse 6 If you removed it in step b be sure to replace the RFI shield 7 Replace the dust cover 8 Connect the line cord to the power source 9 Turn on the front panel power switch and check the operation Power Fuse Line Filter Rear of Power supply Figure 3 1 Line Fuse Location Error Messages Power supply failure may occur during power on selftest or during operation In either case the display may show an error message that indicates the reason for the failure Selftest Errors When a selftest error occurs it prevents all front panel operation The display may show either a power on error message or a checksum error message Power On Error Messages Power o
113. mediate voltage levels VOLT TRIG MAX and VOLT TRIG MIN return the maximum and minimum programmable triggered voltage levels For VOLT SAV RCL RST For VOLT TRIG ABOR VOLT RST This command sets the overvoltage protection OVP level of the power supply If the output voltage exceeds the OVP level then the power supply output is disabled and the Questionable Condition status register OV bit is set see Chapter 8 Status Reporting An overvoltage condition can be cleared with the OUTP PROT CLE command after the condition that caused the OVP trip is removed The OVP always trips with zero delay and is unaffected by the OUTP PROT DEL command Command Syntax Alternate Syntax Parameters Default Suffix RST Value Examples Query Syntax Returned Parameters Related Commands SOURce VOLTage PROTection _LEVel lt NRf gt SOURce VOLTage PROTection AMPLitude lt NRf gt Table 7 1 V MAX VOLT PROT 21 5 VOLT PROT LEV MAX VOLTAGE PROTECTION LEVEL 145E 1 SOURce VOLTage PROTection LE Vel SOURce VOLTage PROTection LEVel MIN SOURce VOLTage PROTection LEVel MAX lt NR3 gt VOLT PROT returns presently programmed OVP level VOLT PROT MAX and VOLT PROT MIN return the maximum and minimum programmable OVP levels OUTP PROT CLE RST SAV RCL Available to accommodate earlier power supply programs 84 Language Dictionary Command Summary This summary lists all power supply subsystem commands in al
114. mensions Width 425 5 mm 16 75 in Height with removable feet 145 1 mm 5 71 in Depth with safety cover 640 mm 25 2 in Weight Net 27 7 kg 61 Ib Shipping 31 4 kg 69 Ib Output Impedance Curves Typical 96 Specifications Calibration Introduction The power supply may be calibrated either from the front panel or from a controller over the GPIB The procedures given here apply to all models Important These instructions do not include verification procedures If you need to perform verification as a prerequisite to or as part of your calibration procedure see Appendix B Verification Equipment Required The equipment listed in Table B 1 or equivalent is required for calibration Table B 1 Equipment Required For Calibration Equipment Characteristics Recommended Model Voltmeter De accuracy 0 005 6 digits Agilent 3456A or 3458A Shunt resistor 100 A 0 001 Q 0 04 100 W Guildline 9230 100 GPIB Controller For Calibration over the GPIB HP Vectra or IBM compatible with GPIB Interface or Agilent BASIC series General Procedure Because the power supply output must be enabled during calibration voltages or currents hazardous to personnel and or damaging to equipment can appear at the output terminals Parameters Calibrated The following parameters may be calibrated e Output voltage Output voltage readback Overvoltage protection OVP Output current Output current r
115. meters 112 Program mnemonic too long maximum 12 characters 113 Undefined header syntactical correct but not defined for this device 121 Invalid character in number e g alpha in decimal data etc 123 Exponent too large numeric overflow exponent magnitude gt 32000 124 Too many digits number too long more than 255 digits received 128 Numeric data not allowed numeric data not accepted where positioned 131 Invalid suffix unrecognized suffix or suffix not appropriate 138 Suffix not allowed numeric element does not allow suffixes Error Messages 109 Table D 1 Summary of System Error Messages continued Error Error String Description Explanation Examples Number 141 Invalid character data bad character or unrecognized 144 Character data too long maximum length is 12 characters 148 Character data not allowed character data not accepted where positioned 150 String data error generic string error 151 Invalid string data e g END received before close quote 158 String data not allowed string data not accepted where positioned 160 Block data error generic data block error 161 Invalid block data e g END received before length satisfied 168 Block data not allowed block data not accepted where positioned 220 Parameter error 221 Settings conflict uncoupled parameters 222 Data out of range e g outside th
116. meters that are saved and recalled Note When you turn the power supply on it automatically retrieves the state stored in location 0 When a power supply is delivered this location contains the factory defaults see RST in Chapter 7 OUTP OFF VOLT LEV 65 PROT 68 Program a desired operating state CURR LEV 33 PROT STAT ON SAV 2 Save this state to location 2 RCL 2 Later recall this same state Writing to the Display You can include messages to the front panel LCD in your programs The description of DISP TEXT in Chapter 7 Language Dictionary shows the number and types of permitted display characters In order to write to the display you must first change it to text mode as shown in the following example DIS MODE TEXT Switch display to text mode RECALLED 2 Write Recalled 2 to the display DIS MODE NORM Return dispaly to its normal mode Programming Status You can use status programming to make your program react to events within the power supply Chapter 8 explains the functions and bit configurations of all status registers Refer to Figure 8 1 in that chapter while examining the examples given here Detecting Events via SRO Usually you will want the power supply to generate interrupts assert SRQ upon particular events For this you must selectively enable the appropriate status register bits The following examples allow the power supply to assert SRQ under selected conditions 1 STAT OPER ENAB 1280 PTR 12
117. minals The pending triggered level is a stored current value that is transferred to the output terminals when a trigger occurs A pending triggered level is unaffected by subsequent CURR commands and remains in effect until the trigger subsystem receives a trigger or an ABORt command is given If there is no pending CURR TRIG level then the query form returns the CURR level In order for CURR TRIG to be executed the trigger subsystem must be initiated see INITiate Command Syntax SOURce CURRent LEVel I MMediate AMPLitude lt NRf gt SOURce CURRent LEVel TRIGgered AMPLitude lt NRf gt Parameters Table 7 1 Default Suffix A RST Value Table 7 1 Examples CURR 200 MA CURRENT LEVEL 200 MA CURRENT LEVEL IMMEDIATE AMPLITUDE 2 5 CURR TRIG 20 CURRENT LEVEL TRIGGERED 20 Query Syntax SOURce CURRent LEVel MMediate AMPLitude SOURce CURRent LEVel MMediate AMPLitude MAX SOURce CURRent LEVel MMediate AMPLitude MIN SOURce CURRent LEVel TRIGgered AMPLitude SOURce CURRent LEVel TRIGgered AMPLitude MAX SOURce CURRent LEVel TRIGgered AMPLitude MIN Returned Parameters lt NR3 gt CURR and CURR TRIG return presently programmed immediate and triggered levels If not triggered level is programmed both returned values are the same CURR MAX and CURR MIN return the maximum and minimum programmable immediate current levels CURR TRIG MAX and CURR TRIG MIN return the maximum and minimu
118. n Front Panel Programming Remote Programming Analog Programming Output Characteristic Output Ranges Downprogramming INSTALLATION Inspection Damage Packaging Material Items Supplied Location and Temperature Bench Operation Rack Mounting Temperature Performance Input Power Source Installing the Power Cord VXI plug amp play Power Products Instrument Drivers Downloading and Installing the Driver Accessing Online Help 3 TURN ON CHECKOUT Introduction Preliminary Checkout Power On Checkout Using the Keypad Shifted Keys Backspace Key Output Checkout Checking the Voltage Function Checking the Current Function Checking The Save And Recall Functions Determining The GPIB Address In Case Of Trouble Line Fuse Error Messages Selftest Errors Amn bh BS W Power On Error Messages Checksum Errors Runtime Error Messages 4 USER CONNECTIONS Rear Panel Connections Load Wire Selection Analog Connector Connecting the Power supply to the Load Output Isolation Capacitive Loads Inductive Loads Battery Charging Local Voltage Sensing Remote Voltage Sensing Setting Up Remote Sense Operation Connecting the Sense Leads CV Regulation Output Rating Output Noise OVP Considerations Stability Operating Configurations Connecting One Power supply to a Single Load Connecting One Power supply To Multiple Loads Connecting Units in Auto Parallel Connecting Units in Series External Voltage Control Controller Connections Stand A
119. n errors are described in Appendix B System Error Messages System error messages are obtained remotely with the SYST ERR query or by pressing the front panel key The error number is the value placed in the error queue SYST ERR returns the error number into a variable and combines the number and the error message into a string Table D 1 lists the system errors that are associated with SCPI syntax errors and with interface problems Information inside the brackets is not part of the standard error message but is included for clarification When system errors occur the Standard Event Status register see Chapter 8 Status Reporting records them as follows Standard Event Status Register Error Bits Bit Set Error Code Error Type Bit Set Error Code Error Type 5 100 thru 199 Command 3 300 thru 399 Device dependent 4 200 thru 299 Execution 2 400 thru 499 Query Table D 1 Summary of System Error Messages Error Error String Description Explanation Examples Number 100 Command error generic command error 101 Invalid character 102 Syntax error unrecognized command or data type 103 Invalid separator illegal character encountered in place of separator 104 Data type error e g numeric or string expected got block date 105 GET not allowed lt GET gt inside a program message 108 Parameter not allowed too many parameters 109 Missing parameter too few para
120. n messages appear as Where n is a number listed in Table 3 3 If this occurs turn the power off and then back on to see if the error persists It is possible to recover from the EE CHKSUM error see Checksum Errors If any other message persists the power supply requires service Turn On Checkout 25 Table 3 3 Power On Selftest Errors Error Display Failed Test Error Display Failed Test No No El FP RAM Front Panel RAM E8 SECRAM Secondary RAM E2 FP ROM Front Panel ROM checksum E9 SEC ROM Secondary ROM checksum E3 EE EEPROM E10 SEC 5V Secondary 5 V ADC CHKSUM reading E4 PRIXRAM Primary external RAM Ell TEMP Secondary ambient E5 PRI TRAM Primary internal RAM thermistor reading E6 PRIROM Primary ROM checksum E12 DACS Secondary VDAC IDAC __ E7 GPIB GPIB R W to serial poll readback Checksum Errors If the display shows EE CHKSUM the power supply has detected an EEPROM checksum error A checksum error can occur due to the following conditions m Excessive number of write cycles to an EEPROM see Nonvolatile Memory Write Cycles in Supplemental Characteristics tables This condition which would appear only after extended use is not recoverable and requires service E Loss of ac input power during a checksum calculation This condition which is very unlikely is recoverable You may be able to recover from a ch
121. n the Start button and select Programs Vxipnp Agxxxx Help 32 bit where Agxxxx is the instrument driver 20 Installation Turn On Checkout Introduction Note This chapter provides a preliminary introduction to the power supply front panel See Chapter 5 Front Panel for more details Successful tests in this chapter provide a high degree of confidence that the power supply is operating properly For verification tests see Appendix C Operation Verification Complete performance tests are given in the service manual Do not apply ac power to the power supply until told to do so Preliminary Checkout 1 Make certain that the front panel switch is off 2 Examine the Line Voltage Rating or Line And Fuse Rating label see Chapter 2 Installation Verify that the line voltage rating agrees with your power source If it does not see Appendix E Line Voltage Conversion 3 Check the sense wiring as follows Remove the output safety cover and examine the output sense terminals They should be wired for local sensing as follows 1 The LS sense terminal wired to the S terminal of the analog connector 2 The LS sense terminal wired to the S terminal of the analog connector 3 If the power supply is not wired for local sensing make the above connections using small capacity wire AWG 22 is sufficient 4 Make sure that there is no load connected to the output terminals or bus bars Power On Checkout
122. nal to the S analog connector pin and the LS sense terminal to the S analog connector pin The power supply is shipped with these jumpers connected Connecting the Sense Leads You must connect the positive side of the load to the S analog connector pin and the negative side of the load to the S analog connector pin see Figure 4 1 Connect the sense leads carefully so that they do not become open circuited If sense leads are left open during operation the unit will regulate at the output terminals instead of at the load Remember to bundle or tie wrap the load leads to minimize inductance and reduce noise pickup CV Regulation The voltage load regulation specification in Table A 1 applies at the output terminals of the power supply When remote sensing this specification must be compensated Add an increment to the voltage load regulation specification as specified by AmV in the equation given under Load regulation in Table A 2 Output Rating The rated output voltage and current specification in Table A 1 applies at the output terminals of the power supply With remote sensing any voltage dropped in the load leads causes the unit to increase the voltage at the output terminals so it can maintain the proper voltage at the load When you attempt to operate at the full rated output at the load this forces the voltage at the output terminals to exceed the unit s rated output This will not damage the unit but may trip the OVP overv
123. ndicate VOLTS Press 4 G Enter If you discover a mistake before pressing Enter erase the incorrect value with the G key The display will return to the meter mode and indicate 0 000 volts Press to enable the output Dis annunciator turns off The VOLTS display will indicate 45 00 volts Note The power supply must be programmed for a minimal current in order to increase the output voltage beyond zero Normally there is sufficient idle current to do this If the power supply does not respond or the CC annunciator turns on go to Programming Current and set the current to a small value E Now raise the voltage by pressing Note that the voltage increases by a specific increment depending on the voltage programming resolution each time you press the key and increases rapidly as you hold down the key To lower the voltage press Voltage m Try raising and lowering the voltage by rotating the Voltage control clockwise and then counterclockwise Note how the output responds as compared to using the Entry keys m Try to program a voltage greater than the Vmax for your unit see Table A 2 Note that the display shows OUT OF RANGE Programming Overvoltage Protection Overvoltage protection guards the load against voltages that reach a specified value above the programmed output voltage 40 Front Panel Operation Setting the OVP Level Assuming that you have programmed the power supply for 45 volts you can set the OVP level to
124. nds described in Chapter 7 Language Dictionary and summarized in Table 8 1 Table 8 1 Status Operation Commands Register Command Query Cleared By Condition None STAT OPER COND Cannot be cleared PTR Filter STAT OPER PTR lt NRf gt STAT OPER PTR Programming 0 NTR Filter STAT OPER NTR lt NRf gt STAT OPER NTR Programming 0 or STAT PRES Event None STAT OPER EVEN Reading or CLS Enable STAT OPER ENAB lt NRf gt STAT OPER ENAB Programming 0 Status Reporting 87 Table 8 2 Bit Configurations of Status Registers Bit Signal Meaning Bit Signal Meaning fe o OPERAT ON TAUS ee STATUS CONDITION PTRNTA EVENT ENABLE PTR NTR EVENT ENABLE LOGICAL OR SERVICE REQUEST GENERATION FIG8 1 GAL Figure 8 1 Power supply Status Model 88 Status Reporting Operation Status Group Standard Event Status Group 0 CAL The interface is computing new 0 OPC Operation complete calibration constants 3 WTG The interface is waiting for a trigger 2 QYE Query error 8 cV The power module is in constant 3 DDE Device dependent error voltage mode 10 CC The power module is in constant 4 EXE Execution error current mode 5 CME Command error 7 PON Power on Questionable Status Group Status Byte and Service Request Enable Registers 0 OV The power module overvoltage 3 QUES Questionable status summary bit protection circuit has tripp
125. ning it more quickly causes a more rapid clockwise change in current Press You have enabled the overcurrent protection circuit The circuit then tripped because of the output short The CC annunciator turns off and the OCP and Prot annunciators come on Output current is near zero Turn On Checkout 23 Press Dis annunciator turns on Press You have disabled the overcurrent protection circuit The OCP annunciator turns off Press You have cleared the overcurrent protection circuit The Prot Shift Protect annunciator turns off Press Dis turns off and CC turns on The output current is restored If you have a shorting wire of sufficient capacity you may continue testing up to the maximum rated current of the power supply see Performance Specifications When finished go to the next step Press Dis turns on and output current drops to zero Turn off the power supply and remove the short from the output terminals Checking The Save And Recall Functions Agilent E4356A power supplies have five nonvolatile memory storage locations 0 through 4 Proceed as follows Make certain that the output is on Dis annunciator is off Set the voltage output to 5 by pressing 5 Enter Save this value to location 1 by pressing Shift Gave Enter Return the output voltage to 0 by pressing Recall This step is based on the fact that a newly shipped power supply has the RST parameters stored in location 0
126. nly from the unit s front panel see Chapter 5 Setting the GPIB Address External Documents SCPI References The following documents will assist you with programming in SCPI Standard Commands for Programmable Instruments Volume 1 Syntax and Style e 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 GPIB References The most important GPIB documents are your controller programming manuals Agilent 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 ANSMIEEE 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 ANSMIEEE 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
127. node to the output terminal of the unit The diode may require a heat sink User Connections 29 Local Voltage Sensing Your power supply was shipped set up for local sensing This means that the unit will sense and regulate its output at the output terminals not at the load Since local sensing does not compensate for voltage drops across screw terminals bus bars or load leads local sensing should only be used in applications that require low output current or where load regulation is not critical Local sensing is obtained by connecting the LS sense terminal to the S analog connector pin and the pin and the LS sense terminal to the S analog connector pin The power supply is shipped with these connections made Note Ifthe sense terminals are left unconnected the voltage at the bus bars will increase approximately 3 to 5 over the programmed value Since it is measured at the sense terminals the voltage readback will not reflect this increase Remote Voltage Sensing The dashed lines in the wiring diagrams illustrate remote voltage sensing The remote sense terminals of the power supply are connected directly to the load rather than to the output terminals This allows the unit to automatically compensate for the voltage drop in the load leads as well as to accurately read back the voltage directly across the load Setting Up Remote Sense Operation Remote sensing is obtained by removing the jumpers connecting the LS sense termi
128. nt You may program the power supply current without a load but must have a load in order to draw output current These tests assume you have the load connected in accordance with the information in Chapter 4 If you do not have a load on the power supply you may connect a short across the output terminals as described in Chapter 3 The example will program a low current You may later increase the output current to the levels you will expect to use To program the output current to 1 3 amperes proceed as follows Disable the output by pressing Output Oa The Dis annunciator will turn on Program the voltage by pressing 5 Enter Press Current The display will change from meter mode to indicate AMPS Press Q G Enter If you discover a mistake before pressing erase the incorrect value with the backspace key G The display will return to the meter mode and indicate up to 0 000 Press to enable the output Dis will turn off and the display will indicate VOLTS 5 000 AMPS 1 300 Now increase the current by pressing Current Note that the current increases by a specific increment depending on the current programming resolution each time you press the key and increases rapidly as you hold down the key To decrease the current press Current m Try increasing and decreasing the current by rotating the Current knob clockwise and counterclockwise Note how the output responds as compared to using the Entry keys m Disa
129. ntrolling overall power supply functions such as reset status and synchronization All common commands consist of a three letter nmemonic preceded by an asterisk RST IDN SRE8 46 Remote Programming Subsystem Commands Subsystem commands see Figure 6 1 perform specific power supply functions They are organized into an inverted tree structure with the root at the top Some are single commands while others are grouped under other subsystems ROOT TRIGger MMediate _ SOURce STATus OPERation EVENt PRESet CONDition QUEStionable ENABle EES NTRansition PTRansition Figure 6 1 Partial Command Tree Traversing the Command Tree Figure 6 1 shows a portion of the subsystem command tree you can see the complete tree in Figure 7 2 Note the location of the ROOT node at the top of the tree The SCPI interface is at this location when The power supply is powered on e A device clear DCL is sent to the power supply The interface encounters a message terminator e The interface encounters a root specifier Active Header Path In order to properly traverse the command tree you must understand the concept of the active header path When the power supply is turned on or under any of the other conditions listed above the active path is at the root That means the interface is ready to accept any command at the root level such as TRIGger or STATus in Figure 6 1 Note that you do not have to prec
130. nvenience only It is not designed to function as a safety ground Capacitive Loads In most cases the power supply will continue to be stable with additional external load capacitors However large load capacitors may cause ringing in the unit s transient response It is possible that certain combinations of load capacitance equivalent series resistance and load lead inductance will result in instability If you need help in solving a stability problem contact an Agilent service engineer through your local Sales and Support Office see end of this guide If the power supply output is rapidly programmed into capacitive loads the unit may momentarily cross into constant current CC mode This extends the CV programming time and limits the maximum slew rate to the programmed current divided by the total internal and external capacitance These momentary crossovers into CC mode will not damage the unit 28 User Connections Note Buss Bar is 8 thick Cu SIDE VIEW OF BUSS BAR Output Safety Cover Analog Connector Output Bus Bar Local Sense Terminal Local Sense Terminal Output Bus Bar Signal Common Local Sense Jumpers Rear Knockouts Bottom Knockout l Insert screwdriver blade in slot and pry out _e Bend along joint and break off WARNING DO NOT LEAVE UNCOVERED HOLES IN OUTPUT COVER IF TOO MANY KNOCKOUTS HAVE BEEN
131. o enter the existing password Proceed as follows 1 Press Pass 2 Enter the new password from the keypad You can use up to six integers and an optional decimal point If you want to operate without requiring any password change the password to 0 zero 3 AGAIN will appear on the display Enter the password a second time 4 When OK is displayed the new password has been accepted 1 CV Test Setup 2 CC Test Setup Figure B 1 Calibration Test Setup 98 Calibration Table B 2 Typical Front Panel Calibration Procedure Action Display Response Enabling the Calibration Mode 1 Begin calibration by pressing Cal Enable PASWD 2 Enter calibration password from Entry keypad If password is correct the Cal annunciator will come on If password is incorrect an error occurs PASSWD ERROR Note The initial factory default password is the model number of the power supply but it can be changed see Changing the Password Entering Voltage Calibration Values 1 Make certain the DVM is the only load on the power supply Meter mode 2 Select the first calibration point by pressing VRDG1 If the power supply is not in CV mode an error occurs WRONG MODE 3 Read the DVM and use the Entry keypad to enter the first voltage value Meter mode 4 Select the second calibration point by pressing again VRDG2 5 Read the DVM and use the Entry keypad to enter the second voltage value Meter mo
132. oltage protection circuit which senses the voltage at the output bus bars When operated beyond its rated output the unit s performance specifications are not guaranteed although typical performance may be good If the excessive demand on the unit forces it to lose regulation the Unr annunciator will indicate that the output is unregulated Output Noise Any noise picked up on the sense leads also appears at the output of the power supply and may adversely affect the load voltage regulation Be sure to twist the sense leads to minimize external noise pickup and route them parallel and close to the load leads In noisy environments it may be necessary to shield the sense leads Ground the shield only at the power supply Do not use the shield as one of the sense conductors 30 User Connections Note The signal ground binding post on the rear panel is a convenient place to ground the sense shield OVP Considerations The OVP circuit senses the voltage near the output terminals and not at the sense terminals Depending on the voltage drop between the output terminals and the load the voltage sensed by the OVP circuit can be significantly higher than actually being regulated at the load You must program the OVP trip high enough to compensate for the expected higher voltage at the output terminals Stability Using remote sensing under unusual combinations of load lead lengths and large load capacitances may cause your application to form a low
133. on This section gives the syntax and parameters for all the IEEE 488 2 SCPI commands and the Common commands used by the power supply It is assumed that you are familiar with the material in Chapter 6 Remote Programming That chapter explains the terms symbols and syntactical structures used here and gives an introduction to programming You should also be familiar with Chapter 5 Front Panel Operation in order to understand how the power supply functions The programming examples are simple applications of SCPI commands Since SCPI syntax remains the same for all programming languages the examples are generic Syntax definitions use the long form but only short form headers or keywords appear in the examples If you have any concern that the meaning of a header in your program listing will not be obvious at some later time then use the long form to help make your program self documenting Parameters Most commands require a parameter and all queries will return a parameter The range for a parameter may vary according to the model of power supply Parameters for all current models are listed in Table 7 1 at the end of this chapter Related Commands Where appropriate related commands or queries are included These are listed either because they are directly related by function or because reading about them will clarify or enhance your understanding of the original command or query Order of Presentation The dictionary is o
134. ont panel LCD and complete calibration functions Power supply status registers permit remote monitoring of the following conditions Overvoltage overcurrent overtemperature and unregulated states Operating mode constant voltage or constant current State of the RI remote inhibit input signal Power on status PON Status of the output queue QYE Pending triggers WTG GPIB interface programming errors CME DDE and EXE Calibration state enabled or disabled The status registers can be programmed to generate an output fault signal FLT upon the occurrence of one or more selected status events Analog Programming The power supply has an analog port for remote programming The output voltage and or current of the power supply may be controlled by individual dc programming voltages applied to this port The port also provides a monitor output that supplies a dc voltage proportional to the output current General Information 15 Output Characteristic The power supply can operate in either CV constant voltage or CC constant current over its output voltage and current ratings see Figure 1 1 Although the power supply can operate in either mode it is designed as a constant voltage source This means that the unit turns on in constant voltage mode with the output voltage rising to its Vset value There is no command for constant current operation The only way to turn the unit on in constant current mode is by placing a
135. ontroller interface and must have a unique primary GPIB bus address The stand alone configuration uses only direct supplies connected to the controller interface The linked configuration uses 1 or more linked power supplies connected to each direct unit Each linked unit has a unique secondary GPIB bus address and derives its primary address from the direct unit Figure 4 10 Controller Connections User Connections Front Panel Operation Introduction This chapter shows you how to operate the front panel It is assumed that you are familiar with the turn on checkout procedure in Chapter 3 That chapter describes how to perform basic power supply functions from the control panel operations that you can perform are Enabling or disabling the power supply output Setting the output voltage and current Monitoring the output voltage and current Setting the overvoltage protection OVP trip point Enabling the overcurrent protection OCP circuit Saving operating states in nonvolatile memory Recalling operating states from nonvolatile memory Setting the power supply GPIB bus address Displaying error codes created during remote operation Enabling local front panel operation Note You also can calibrate the power supply from the front panel see Appendix B Getting Acquainted The front panel is summarized in Figure 5 1 and Table 5 1 Note that the panel is organized as follows LCD display including annunciators
136. or descriptions of all three registers Bit Configuration of Standard Event Status Enable Register Bit Position 7 6 5 4 3 2 1 0 Bit Name PON 0 CME EXE DDE QYE 0 OPC Bit Weight 128 64 32 16 8 4 2 1 CME Command error DDE Device dependent error EXE Execution error OPC Operation complete PON Power on QYE Query error Command Syntax ESE lt NRf gt Parameters 0 to 255 Power On Value See PSC Suffix None Example ESE 129 Query Syntax ESE Returned Parameters lt NR1 gt Register value Related Commands ESR PSC STB CAUTION If PSC is programmed to 0 then the ESE command causes a write cycle to nonvolatile memory The nonvolatile memory has a finite maximum number of write cycles see Table A 2 Supplementary Characteristics Programs that repeatedly cause write cycles to nonvolatile memory can eventually exceed the maximum number of write cycles and may cause the memory to fail ESR Meaning and Type Event Status Register Device Status Description This query reads the Standard Event Status Event register Reading the register clears it The bit configuration of this register is the same as the Standard Event Status Enable register ESE See Chapter 8 Status Reporting for a detailed explanation of this register Query Syntax Parameters Returned Parameters Related Commands ESR None lt NRI gt Register binary value CLS ESE ESE OPC Language Dictionary 65 IDN
137. output and save present state to location 2 CODES OUTPUT OFF SAV 2 GOSUB 2000 END Send command to power supply CALL IBWRT PS CODES IF IBSTAT lt 0 THEN GOTO 2100 Error detected RETURN Disable output and save present state to location 2 CODES OUTPUT OFF SAV 2 GOSUB 2000 END Send command to power supply CALL IBWRT PS CODES IF IBSTAT lt 0 THEN GOTO 2100 Error detected RETURN Error detection routine PRINT GPIB error IBSTAT amp H HEX IBS TAT PRINT IBERR IBERR in line ERL STOP Get data from power supply CALL IBRD PS OUTPUT IF IBSTA lt 0 THEN GOTO 2100 1 X 1 C INSTR I OUTPUTS Parse data string 60 Remote Programming Programming Some Power supply Functions continued 13030 WHILE C lt gt 0 3035 D MID OUTPUT I C l 3040 OUTPUT X VAL D Get values 3045 l C 1 3050 C INSTR I OUTPUTS 3055 X X 41 13060 WEND 13065 D RIGHT OUTPUT LEN OUTPUTS I 1 13070 OUTPUT X VAL D 3076 OUTPUT SPACE 40 Clear string 3080 RETURN PEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEELEEELEEE LEELEE LEELEE LEELEE IOI LEELEE ELLLER Controller Using Agilent BASIC PEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEE EEEE EEEEEEEEEEEEEEEEEEEEEEEEEEEE EEEE LEEK 1000 Power supply at stand alone address 706 11005 OPTION BASE 1 1010 DIM Codes 80J Response 80 Mode 32 1020 Program power supply to CV mode with following
138. phabetical order followed by all common commands in alphabetical order See Table 7 1 for the command parameters accepted by the power supply Command Summary Command Parameters Subsystem Commands MEAS CURR DC none MEAS VOLT DC none OUTP STAT 0111 OFFION OUTP STAT none OUTP PROT CLE none OUTP PROT DEL 0 to 32 767IMINIMAX OUTP PROT DEL none IMINIMAX OUTP REL STAT 011 20FFION OUTP REL STAT none OUTP REL POL NORMIREV OUTP REL POL none STAT OPER COND none STAT OPER ENAB lt NRf gt STAT OPER ENAB none STAT OPER EVEN none STAT OPER NTR lt NRf gt STAT OPER NTR none STAT OPER PTR lt NRf gt STAT OPER PTR none STAT PRES none STAT QUES COND none STAT QUES ENAB lt NRf gt STAT QUES ENAB none STAT QUES EVEN none SYST ERR none SYST LANG TMSLICOMP SYST LANG none SYST VERS none TRIG IMM TRIG SOUR TRIG SOUR SOUR VOLT LEV IMM AMPL lt NRf gt suffix SOUR VOLT LEV IMM AMPL none IMINIMAX SOUR VOLT LEV TRIG AMPL lt NRf gt suffix SOUR VOLT LEV TRIG AMPL none IMINIMAX SOUR VOLT PROT LEV lt NRf gt suffix SOUR VOLT PROT LEV lt NRf gt suffix Language Dictionary 85 Command Summary Command Parameters Subsystem Commands ABOR none CAL See Appendix A in the Operating Manual SOUR CURR LEV IMM AMPL lt NRf gt suffix
139. ply s fourdigit model number If the password is set to 0 password protection is removed and CAL STAT ON is unrestricted A new password is automatically stored in nonvolatile memory and does not have to be stored with the CAL SA VE command Command Syntax Parameters Examples Query Syntax Related Commands CAL SAVE CALibrate PASScode lt NRf gt lt NRf gt CAL PASS 4356 None CAL STAT CAL PASS 09 1993 This command saves any new calibration constants after a current or voltage calibration procedure has been completed in nonvolatile memory Command Syntax Parameters Examples Query Syntax Related Commands CALibrate SAVE None CAL SAVE None CAL CURR CAL VOLT CAL STAT Calibration 101 CAL STAT This command enables and disables the calibration mode The calibration mode must be enabled before the power supply will accept any other calibration commands The first parameter specifies the enabled or disabled state The second parameter is the password It is required if the calibration mode is being enabled and the existing password is not 0 If the second parameter is not entered or is incorrect an error is generated and the calibration mode remains disabled The query statement returns only the state not the password Note that whenever the calibration mode is changed from enabled to disabled any new calibration constants are lost unless they have been stored with CAL SAVE Command Syntax CALibrate STATe
140. pply to a state that was previously stored in memory with a SAV command to the specified location The following states are recalled CURR LEV IMM OUTP STAT OUTP REL POL CURR PROT STAT OUTP PROT DEL VOLT LEV IMM DIG DATAL VAL OUTP REL STAT VOLT PROTI LEV Sending RCL also does the following Forces an ABORt command before resetting any parameters this cancels any uncompleted trigger actions Disables the calibration function by setting CAL STATe to OFF Sets display functions as follows DISP WIND STATe to ON DISP WIND MODE to NORMal DISP WIND TEXT to Sets INIT CONT to OFF Sets TRIG SOUR to BUS At power turn on the power supply normally is returned to the factory defined turn on state see RST However it also may turn on to the state stored in location 0 see Turn On Condition under Chapter 5 Front Panel Operation of the power supply Operating Guide Command Syntax RCL lt NRf gt Parameters 0111213 Example RCL 3 Query Syntax None Related Commands PSC RST SAV 68 Language Dictionary RST Meaning and Type Reset Device State Description This command resets the power supply to a factory defined state as defined below RST also forces an ABORt command Command CAL STAT OFF CURR LEV IMM CURR LEV TRIG CURR PROT STAT OFF DIG DATA 0 DISP WIND STAT ON DISP WIND MODE NORM DISP WIND TEXT INIT CONT OFF Model dependent See
141. pply to the controller The power supply sends the message only when commanded by a special program message called a query Structure of a SCPI Message SCPI messages consist of one or more message units ending in a message terminator The terminator is not part of the syntax but implicit in the way your programming language indicates the end of a line such as a newline or end of line character The following command message see Figure 6 2 is briefly described here with more details in subsequent paragraphs Data Message Unit Keywords Query Indicator VOLT LEV 4 5 PROT 4 8 CURR lt NL gt Keyword Separator Message Terminator Message Unit Separators Root Specifier FIGB 1 GAL Figure 6 2 Command Message Structure The basic parts of the message in Figure 6 1 are Message Component Example Headers VOLT LEV PROT CURR Header Separator The colon in VOLT LEV Data 4 5 48 Data Separator The space in VOLT 4 5 and PROT 4 8 Message Units VOLT LEV 4 5 PROT 4 8 CURR Message Unit Separator The semicolons in VOLT LEV 4 5 and PROT 4 8 Root Specifier The colon in PROT 4 8 CURR Query Indicator The question mark in CURR Message Terminator The lt NL gt newline indicator Terminators are not part of the SCPI syntax The Message Unit The simplest SCPI command is a single message unit consisting of a command header or keyword followed by a message terminator ABOR VOLT The message unit may include a paramete
142. pt 2004 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 Company The information contained in this document is subject to change without notice 4 Declaration Page ssi Agilent Technologies DECLARATION OF CONFORMITY According to ISO IEC Guide 22 and CEN CENELEC EN 45014 Manufacturer s Name and Address Responsible Party Alternate Manufacturing Site Agilent Technologies Inc Agilent Technologies Malaysia Sdn Bhd 550 Clark Drive Suite 101 Malaysia Manufacturing Budd Lake New Jersey 07828 Bayan Lepas Free Industrial Zone PH HI USA 11900 Penang Malaysia Declares under sole responsibility that the product as originally delivered Product Names a Single Output 2 000 Watt System dc Power Supplies b Single Output 2 000 Watt Manually Controlled dc Power Supplies c Single Output 5 000 Watt System dc Power Supplies d Single Output 6 500 Watt System dc Power Supplies Model Numbers a 6671A 6672A 6673A 6674A 6675A b 6571A 6572A 6573A 6574A 6575A c 6680A 6681A 6682A 6683A 6684A d 6690A 6691A 6692A e E4356A Product Options This declaration covers all options and customized products based on the above products Complies with the essential requirements of the Low Voltage Directive 73 23 EEC and the EMC Directive 89 33
143. r 3 Turn On Checkout Query Syntax TST Returned Parameters lt NRI1 gt 0 Indicates power supply passed self test Nonzero Indicates an error code Related Commands None WAI Meaning and Type Wait to Continue Device Status Description This command instructs the power supply not to process any further commands until all pending operations are completed Pending operations are as defined under the OPC command WAI can be aborted only by sending the power supply a GPIB DCL Device Clear command Command Syntax WAI Parameters None Query Syntax None Related Commands OPC OPC Language Dictionary 71 Description Of Subsystem Commands Figure 7 2 is a tree diagram of the subsystem commands Commands followed by a question mark take only the query form Except as noted in the syntax descriptions all other commands take both the command and query form The commands are listed in alphabetical order and the commands within each subsystem are grouped alphabetically under the subsystem ROOT ABORt CALIbrate Note DISPlay WINDow STATe sINITiate MMediate woo L CONTinuous TEXT SOURce CURRent ie 7 pa NOTES Tee a Sa DATA IMMediate AMPLitude TRIGgered AMPLitude PROTection STATe DATA MNALue IMMediate AMPLitude VOLTage LEVel ar iTRiGgered AMPLtude PROTection LEVel
144. r INIT CONT OILIOFFION OFF INIT INITIATE IMMEDIATE INIT CONT 1 INITIATE CONTINUOUS 1 For INIT IMM None For INIT CONT INIT CONT lt NRI gt Oll ABOR lt GET gt RST TRIG TRG These queries return the voltage and current measured at the power supply s sense terminals Query Syntax Parameters Default Suffix Examples Returned Parameters 76 Language Dictionary MEASure CURRent DC MEASure VOLTage DC None A for MEAS CURR V for MEAS VOLT MEAS CURR MEAS VOLT MEASURE VOLTAGE DC MV lt NR3 gt Output Subsystem This subsystem controls the power supply s voltage and current outputs and an optional output relay OUTP This command enables or disables the power supply output The state of a disabled output is a condition of zero output voltage and a model dependent minimum source current see Table 7 1 The query form returns the output state Commandd Syntax Parameters Suffix RST Value Examples Query Syntax Returned Parameters Related Commands OUTP PROT CLE OUTP PROT DEL OUTPut STATe lt bool gt 0 OFF 1110ON None 0 OUTP1 OUTPUT STATE ON OUTPut STATe lt NRI gt Oorl RST RCL SAV These output protection commands do the following OUTP PROT CLE Clears any OV overvoltage OC overcurrent unless set via external voltage control OT overtemperature or RI remote inhibit protection features After this command the output is restored to the state it was in
145. r after the header The parameter usually is numeric but it can be a string VOLT 20 VOLT MAX Remote Programming 49 Headers Headers which are sometimes known as keywords are instructions recognized by the power supply interface Headers may be either in the long form or the short form Long Form The header is completely spelled out such aa VOLTAGE STATUS DELAY Short Form The header has only the first three or four letters such as VOLT STAT DEL Short form headers are constructed according to the following rules If the header consists of four or fewer letters use all the letters DFI DATA If the header consists of five or more letters and the fourth letter is not a vowel a e i 0 u use the first four letters VOLTage STATus If the header consists of five or more letters and the fourth letter is a vowel a e i 0 u use the first three letters DELay CLEar You must follow the above rules when entering headers Creating an arbitrary form such as QUEST for QUESTIONABLE will result in an error The SCPI interface is not sensitive to case It will recognize any case mixture such as VOLTAGE Voltage Volt volt Note Shortform headers result in faster program execution Header Convention In this manual headers are emphasized with boldface type The proper short form is shown in upper case letters such as DELay Header Separator If a command has more than one header you must separate them with a colon
146. r information about encoding the commands as language strings Determining the Cause of a Service Interrupt You can determine the reason for an SRQ by the following actions Use a serial poll or the STB query to determine which summary bits are active Read the corresponding Event register for each summary bit to determine which events caused the summary bit to be set When an Event register is read it is cleared This also clears the corresponding summary bit e The interrupt will recur until the specific condition that caused each event is removed If this is not possible the event may be disabled by programming the corresponding bit of the status group Enable register or NTRIPTR filter A faster way to prevent the interrupt is to disable the service request by programming the appropriate bit of the Service Request Enable register Status Reporting 91 Servicing an Operation Status Mode Event This example assumes you want a service request generated whenever the power supply switches to the CC constant current mode From Figure 8 1 note that the required path is for a condition at bit 10 CC of the Operation Status register to set bit 6 RQS of the Status Byte register The required register programming is shown in Table 8 5 Table 8 5 Generating RQS from the CC Event Register Command Comment Operation PTR STAT OPER PTR 1024 Allows a positive transition at the CC input bit 10 to be latched into the
147. r off Save the above state to location 2 by pressing O Enter Restore the first state by pressing Recall and verify the parameters Restore the second state by pressing Recall C Enter Note how the power supply is automatically programmed each time Turn On Conditions Whenever you apply power to a new power supply it automatically turns on in a safe reset state with the following parameters off 0 minimum maximum off Minimum is the RST value specified in Table A 2 It is recommended that you leave the turn on conditions as programmed However you may change them To do this 1 Set up the power supply to the state you want when it is turned on 2 Store that state to location 0 3 Turn off the power supply 4 Hold in the key and turn the power supply back on The display indicates RCL 0 PWR ON to verify that the power supply has configured its turn on state to that stored in location 0 5 From now on the unit will always turn on to the state defined in location 0 To return the power supply to the original factory reset state hold down the 9 key when you turn on the unit The display indicates RST POWER ON to verify that the power supply has configured its turn on state to the original reset state From now on it will continue to turn on in that state Setting The GPIB Address Types of Power supply GPIB Addresses Figure 4 8 in Chapter 4 shows the ways the power supply can be connected to the GPIB bus
148. rage time for output voltage to change after receipt of digital data when the unit is connected directly to the GPIB Bus Output Voltage Rise Time Fall Time 100 ms 200 ms time for output to change from 90 to 10 or from 10 to 90 of its excludes command processing time total excursion with full resistive load Full load Programming Speed Up Time Down Time 200 ms 475 ms time for output to settle within 4 LSBs of the final value with full excludes command processing time resistive load No load Programming Discharge Time 650 ms time for output to fall to 0 5V when programmed from full voltage excludes command processing time to zero volts Monotonicity Output is monotonic over entire rated voltage current and temp range Auto Parallel Configuration Up to 3 units Analog Programming IP amp VP VP Input Signal 0 to 4 15 V signal source must be isolated VP Input Impedance 60 kQ nominal VP input is referenced to output IP to IP Differential Input 0 to 6 75 V _signal common Current Monitor Output IM IM Output Signal 0 25 to 8 08 V signal range corresponds to from Output Impedance 490 Q 0 to 100 of output current Nonvolatile Savable States Memory Locations 5 0 through 4 Memory Write Cycles 40 000 typical Factory Prestored State Location 0 Digital Port Characteristics Maximum ratings 16 5 Vdc between terminals 1 amp 2 3 amp 4 and from 1 or 2 to chassi
149. ram a single power supply There are special considerations when you have two or more supplies connected in series or in autoparallel See Chapter 4 User Connections and Considerations The power supply accepts values directly in volts and amperes Values will be rounded off to the nearest multiple of the output resolution see Programming Resolution in Table A 2 If you attempt to enter a value not in a valid range the unit will either switch to the other range or the entry will be ignored and OUT OF RANGE appears on the display Figure 1 1 shows the general response of the E4356A power supply Unless directed otherwise always keep the output voltage and current within the boundaries of its operating line for the specified mode of operation CV or CC Establishing Initial Conditions Set the power supply to its RST state by pressing Recan Enter This state was stored in location 0 at the factory If it has since been changed you can restore it as directed under Turn on Conditions later in this chapter RST results in the following operating conditions Zero voltage output Minimal current output Output disabled Dis annunciator on Overcurrent protection off OCP annunciator off Protection circuits cleared Prot annunciator off Overvoltage protection set to maximum Programming Voltage To program the output for 45 volts proceed as follows Press Voltage The display will change from meter mode to i
150. rameters Examples Related Commands SYST LANG SYSTem ERRor None lt NRI gt lt SRD gt SYST ERR SYSTEM ERROR None This command switches the interface between its SCPI TMSL command language and its compatibility language The compatability language is provided for emulation of older power supply systems and is described in Appendix G Sending the command causes The alternate language to become active and to be stored in nonvolatile memory e The power supply to reset to the state stored in Location 0 If the power supply is shut off it will resume operation in the last selected language when power is restored Command Syntax Parameters Default Value Examples Query Syntax Returned Parameters Related Commands SYST VERS SYSTem LANGuage lt string gt Syntax is the same regardless of the present language TMSL COMPatibility Note Parameter TMSL must be used in place of SCPI TMSL or last selected language SYST LANG TMSL SYSTEM LANGUAGE COMPATIBILITY SYSTem LANGuage lt CRD gt TMSL COMP None This query returns the SCPI version number to which the power supply complies The returned value is of the form YYYY V where YYYY represents the year and V is the revision number for that year Query Syntax Parameters Returned Parameters Examples Related Commands 82 Language Dictionary SYSTem VERSion none lt NR2 gt SYST VERS SYSTEM VERSION None Trigger Subsystem This
151. rganized as follows IEEE 488 2 common commands in alphabetical order Subsystem commands Common Commands Common commands begin with an and consist of three letters command or three letters and a query Common commands are defined by the IEEE 488 2 standard to perform some common interface functions The power supply responds to the 13 required common commands that control status reporting synchronization and internal operations The power supply also responds to five optional common commands controlling triggers power on conditions and stored operating parameters Subsystem Commands Subsystem commands are specific to power supply functions They can be a single command or a group of commands The groups are comprised of commands that extend one or more levels below the root The description of subsystem commands follows the listing of the common commands Language Dictionary 63 Description Of Common Commands Figure 7 1 shows the common commands and queries These commands are listed alphabetically in the dictionary Ifa command has a corresponding query that simply returns the data or status specified by the command then both command and query are included under the explanation for the command If a query does not have a corresponding command or is functionally different from the command then the query is listed separately The description of each common command or query specifies any status registers affected In order
152. rial link cable Each linked unit has a unique secondary GPIB address and derives its primary address from the direct unit You may connect from 1 to 15 linked supplies to each direct unit Note The power supply is shipped from the factory with its GPIB address set to 5 The power supply primary and secondary addresses can be changed from the front panel as described in Chapter 6 Remote Programming For power supply GPIB interface capabilities see Table 1 5 in Chapter 1 of this guide User Connections 35 gt QOOO8OO0O ow ee 36 DIRECT SUPPLY DIRECT SUPPLY NOTE 1 a Stand Alone Configuration Note 2 UNKED SUPPLY LINKED SUPPLY LINKED SUPPLY DIRECT SUPPLY NOTE 1 b Serial Link Configuration Note 3 From 1 to 16 direct supplies may be connected to 1 controller GPIB interface Tighten connector thumbscrews by hand Do not use a screwdriver Do not stack more than 3 connectors on a GPIB receptacle GPIB cable see Accessories in Chapter 1 From 1 to 15 linked supplies may be connected to 1 direct unit Either receptacle Jl or J2 may be used as an input or an output Serial Link Cable see Accessories in Chapter 1 2 meters 1 is supplied Maximum total length of all GPIB cables including controller not to exceed 20 meters Use caution with individual lengths over 4 meters Maximum total length of all serial cables not to exceed 30 meters NOTES A direct power supply is connected to the c
153. rs Sample Program Code SCPI Confirmed Commands NON SCPI Commands 7 LANGUAGE DICTIONARY Introduction Parameters Related Commands Order of Presentation Common Commands Subsystem Commands Description Of Common Commands CLS ESE ESR IDN OPC OPC OPT RCL RST SAV SRE STB TRG TST WAI Description Of Subsystem Commands ABOR Calibration Commands Current Subsystem CURR CURR TRIG CURR PROT STAT Digital Subsystem DIG DATA Display Subsystem DISP DISP MODE DISP TEXT Initiate Subsystem INIT INIT CONT Measure Subsystem MEAS CURR MEAS VOLT Output Subsystem OUTP OUTP PROT CLE OUTP PROT DEL OUTP REL OUTP REL POL Status Subsystem STAT PRES Status Operation Registers STAT OPER STAT OPER COND STAT OPER ENAB STAT OPER NTR STAT OPER PTR Status Questionable Registers STAT OUES STAT QUES COND STAT QUES ENAB STAT QUES NTR STAT QUES PTR System Commands SYST ERR SYST LANG SYST VERS Trigger Subsystem TRIG TRIG SOUR Voltage Subsystem VOLT VOLT TRIG VOLT PROT Command Summary Programming Parameters STATUS REPORTING Power supply Status Structure Operation Status Group Register Functions Register Commands Questionable Status Group Register Functions Register Commands Standard Event Status Group Register Functions Register Commands Status Byte Register The MSS Bit The RQS Bit Output Queue Service Request Enable Register Inhibit Fault Indicator RI Remote Inhibit DFI Discrete Fau
154. s FLT INH Terminals 1 amp 2 I low level output current 1 25 mA maximum Va low level output voltage 0 5 V maximum FLT INH Terminals 3 amp 4 Vi low level input voltage 0 8 V maximum Vin high level input voltage 2 0 V minimum I dow level input current 1 mA tw pulse width 100 us minimum td time delay 4 ms typical Digital OUT Port 0 1 2 Ion high level output leakage 16 5V 100 uA ports 0 1 12 5 mA port 2 Open Collector Ion high level output leakage 5 25V 100 uA ports 0 1 250 uA port 2 I low level output sink current 0 5V 4mA I low level output sink current 1V 250 mA Digital IN Port 2 I low level input current 0 4 V 1 25 mA Internal 4 64 k Pullup In high level input current 5 25 V 250 uA Vi low level input voltage 0 8 V maximum Vin high level input voltage 2 0 V minimum GPIB Interface Capabilities Languages SCPI default Compatibility Interface AH1 CO DC1 DT1 E1 LE4 PPO RL1 SH1 SR1 TE6 Serial Link Capabilities Maximum number of units 16 multiple units sharing one Maximum number of linked units 15 GPIB primary address Maximum total chain cable length 30 m 100 ft Recommended Calibration 1 year Interval Specifications 95 Table A 2 Supplemental Characteristics continued Safety Compliance Complies with CSA 22 2 No 231 IEC 348 Designed to comply with UL 1244 RFI Suppression Complies with CISPR Il Group 1 Class B Di
155. s Byte register This bit bit 3 is the logical OR of all the Questionable Event register bits that are enabled by the Questionable Status Enable register Command Syntax Parameters Suffix Default Value Examples Query Syntax Returned Parameters Related Commands STAT QUES NTR STAT QUES PTR STATus QUEStionable ENABle lt NRf gt 0 to 32727 None 0 STAT QUES ENAB 20 STAT QUES ENAB 16 STATus QUEStionable ENABle lt NRI gt Register value STAT QUES These commands allow you to set or read the value of the Questionable NTR Negative Transition and PTR Positive Transition registers These registers serve as polarity filters between the Questionable Enable and Questionable Event registers to cause the following actions When a bit of the Questionable NTR register is set to 1 then a 1 to 0 transition of the corresponding bit of the Questionable Condition register causes that bit in the Questionable Event register to be set When a bit of the Questionable PTR register is set to 1 then a 0 to 1 transition of the corresponding bit in the Questionable Condition register causes that bit in the Questionable Event register to be set If the same bits in both NTR and PTR registers are set to 1 then any transition of that bit at the Questionable Condition register sets the corresponding bit in the Questionable Event register If the same bits in both NTR and PTR registers are set to 0 then no transition of that bit at
156. scription Similar SCPI Command VSET x These commands program output voltage See Table 7 1 for the VOLT VSET xV programming ranges of these commands VSET xMV Initial condition 0 V ISET x These commands program output current See Table 7 1 for the CURR ISET xA programming ranges for these commands ISET xMA Initial condition 0 A VSET These commands read voltage or current settings VOLT ISET CURR VOLT These commands measure and read output voltage or current MEAS VOLT IOUT MEAS CURR OVP x NOTE OVP commands do not work with Agilent 603xA VOLT PROT OVP xV supplies These commands program the overvoltage protection OVP xMV The OVP setting is programmed in either volts or millivolts See Table 7 1 for the programming ranges of these commands Initial condition 10 above rated output OVP This command reads the OVP setting VOLT PROT VMAX x These commands program an upper limit soft limit to the voltage None VMAX xV programming value that the power supply will accept The VMAX programming ranges are the same as those used for VSET xMV IMAX x These commands program an upper limit soft limit to the current None IMAX xA programming value that the power supply will accept The IMAX programming ranges are the same as those used for ISET xMA VMAX These commands read the soft voltage or current limits None IMAX DLY x These commands program the delay time before a new output OUTP PROT DEL
157. see applicable test table 7 Record the front panel display readback 8 Program output current to full scale 9 Repeat Steps 6 and 7 Both current readings within specified High Current and readback limits see applicable test table 5 Enable the output Output On or OUTP ON 10 Disable the output Value within Low Current limits see applicable test 11 Remove the short from across the load Table C 4 Operation Verification Test Parameters Test Description Minimum Spec Results Maximum Spec Measurement Uncertainty Voltage Programming and Readback Low Voltage 0 V Vou 80 mV mV 80 mV 2 2 uV Front Panel Display Readback Vout 120 mV mV Vout 120 mV 2 2 uV High Voltage 80 V Vout 79 888 V v 80 112 V 1 mV Front Panel Display Readback Vout 160 mV mV Vout 160 mV l1 mV Current Programming and Readback Low Current 0 A Tout 25 mA mA 25 mA 21 uA Front Panel Display Readback Tout 35 mA mA Tout 35 mA 21 uA High Current 30 A Tout 29 945 A A 30 055 A 15 mA Front Panel Display Readback Tout 65 mA mA Tout 65 mA 15 mA Enter your test results in this column Verification 107 Error Messages Power supply Hardware Error Messages Front panel error messages resulting from selftest errors or runtime failures are described in Chapter 3 Turn On Checkout Calibration Error Messages Front panel error messages resulting from calibratio
158. serial link It gets its primary address from the direct unit It has a unique secondary address that can be from to 15 It is entered as an integer preceded by a decimal separator For example l or 12 When you enter a secondary address leading zeros between the decimal separator and the first digit are ignored For example 1 01 and 001 are accepted as secondary address 1 and displayed as 0 01 Zeros following a digit are not ignored Thus 10 and 010 are both accepted as secondary address 10 and displayed as 0 10 Changing the Power supply GPIB Address Use the Address key and numerical keypad for entering addresses The power supply is shipped with a 5 stand alone address as the default The general procedure for setting an address is Action Display Shows Press Current address Press new address keys New address replaces numbers on the display Remote Programming 55 Press Display returns to meter mode If you try to enter a forbidden number ADDR ERROR is displayed The following examples show how to set addresses To set stand along primary address 6 press 6 Enter To set direct unit primary address 6 press o0 To set linked secondary address 1 press O To set linked secondary address 12 press O 0ft Note The power supply display will reset recall the state in location 0 whenever you change between the following types of GPIB addresses e A stand alone primary address and a direct primary address e A dir
159. set the other program sources to zero Keep the total programmed setting of the unit the analog input summed with the GPIB or front panel settings at or under the output ratings specified in Table A 2 Exceeding the output ratings will not damage the unit but it may not be able to regulate its output at the higher levels If this happens the Unr annunciator will light to warn you that the output is unregulated Controller Connections Figure 4 10 shows two basic ways of connecting your power supply to a controller They are linked and stand alone configurations Stand Alone Connections See Figure 4 10A Each stand alone power supply has its own GPIB bus address Stand alone power supplies may be connected to the bus in series configuration star configuration or a combination of the two You may connect from 1 to 15 stand alone power supplies to a controller GPIB interface Linked Connections See Figure 4 10B Up to 16 power supplies may be used at a single GPIB primary bus address by making linked connections You cannot use linked connections if you intend to program power supplies with the Compatibility Language see the Appendix G m The first power supply in a linked connection is a direct unit connected to the controller via a GPIB cable The direct unit is the only unit connected directly to the bus and has a unique primary bus address m The remaining power supplies are linked units connected to the direct unit via a se
160. short connected across the power supply output Do not program maximum output currents unless the shorting wire is capable of handling the current see Supplemental Characteristics and Table 4 2 The AMPS display will show various readings Ignore the VOLTS display Table 3 2 Checking the Current Functions Output Terminals Shorted Procedure __ Display Explanation Turn off the power supply and connect a 14 AWG or larger wire across the output and terminals If you intend to test at full rated output current use a wire or wires of sufficient size to carry the maximum current of the unit see Supplemental Characteristics in Chapter and Table 4 2 in Chapter 4 Turn on the unit Meter mode Essentially zero output with Dis annunciator on Press BO VOLT 80 00 Program output to 80 volts Press Current CURR 1 000 Program output to 1 ampere Press 1 000 Dis annunciator turns off CC annunciator turns on and AMPS display shows the programmed current Press several times Current decreases several milliamperes each time you press the key Press the same Current increases several milliamperes each time you press the key number of times The number of milliamperes is determined by the current programming resolution of the power supply see Supplemental Characteristics in Chapter 1 Rotate the Current control Control operates similarly to the and keys The counterclockwise and then control is rate sensitive Tur
161. sonal injury Do not product Do not proceed beyond a CAUTION sign proceed beyond a WARNING sign until the indicated conditions are fully understood until the indicated conditions are fully and met understood and met Acoustic Noise Information Herstellerbescheinigung Diese Information steht im Zusammenhang mit den Anforderungen der Maschinenl minformationsverordnung vom 18 Januar 1991 Schalldruckpegel Lp lt 70 dB A Am Arbeitsplatz Normaler Betrieb Nach EN 27779 Typprufung Manufacturer s Declaration This statement is provided to comply with the requirements of the German Sound Emission Directive from 18 January 1991 Sound Pressure Lp lt 70 dB A At Operator Position Normal Operation According to EN 27779 Type Test Printing History The edition and current revision of this manual are indicated below Reprints of this manual 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 manual In some cases the changes apply to specific instruments Instructions provided on the change sheet will indicate if a particular change applies only to certain instruments Copyright 1999 Agilent Technologies Company Edition 1 August 1999 Updated March 2000 Se
162. splay Press Display returns to meter mode If you try to enter a forbidden number ADDR ERROR is displayed The following examples show how to set addresses To set stand along primary address 6 press Enter To set direct unit primary address 6 press O Enter To set linked secondary address 1 press O Enter To set linked secondary address 12 press O Ente Note The power supply display will reset recall the state in location 0 whenever you change between the following types of GPIB addresses e a stand alone primary address and a direct primary address e a direct primary address and a secondary address 44 Front Panel Operation Remote Programming Prerequisites for Remote Programming This organization of this guide assumes that you know or can learn the following information 1 3 How to program in your controller language Agilent BASIC QUICKBASIC C etc The basics of the GPIB IEEE 488 How to program I O statements for an IEEE 488 bus instrument From a programming aspect the power supply is simply a bus instrument How to format ASCII statements within you I O programming statements SCPI commands are nothing more than ASCII data strings incorporated within those I O statements The basic operating principles of the power supply as explained in Chapter 5 Front Panel Operation of the Operating Guide How to set the GPIB address of the power supply This cannot be done remotely but o
163. subsystem controls remote triggering of the power supply TRIG When the trigger subsystem is enabled TRIG generates a trigger signal The trigger will then 1 Initiate a pending level change as specified by CURR LEV TRIG or VOLT LEV TRIG Clear the WTG bit in the Status Operation Condition register 3 If INIT CONT has been given the trigger subsystem is immediately re enabled for subsequent triggers As soon as it is cleared the WTG bit is again set to 1 Command Syntax Parameters Examples Query Syntax Related Commands TRIG SOUR TRIGger IMMediate None TRIG TRIGGER IMMEDIATE None ABOR CURR TRIG INIT TRG VOLT TRIG This command selects the trigger source Since the power supply has no other trigger source than the GPIB bus this command need not be used It is included in the command set to provide programming compatibility with other instruments such as the Agilent Electronic Load family that may have more than one trigger source Command Syntax Parameters RST Value Examples Query Syntax Returned Parameters Related Commands Voltage Subsystem TRIGer SOURce lt CRD gt BUS BUS TRIG SOUR BUS TRIGGER SOURCE BUS TRIGger SOURce BUS RST TRG TRIG IMM This subsystem programs the output voltage of the power supply VOLT VOLT TRIG These commands set the immediate voltage level or the pending triggered voltage level of the power supply The immediate level is the voltage programmed for th
164. supply to act on commands that INIT ON TRIG have been previously sent but are being held pending The unit INIT ON TRG continues to operate with previously received values until a trigger command is received see HOLD command The device trigger interface message performs the same function STO RCL These commands cause the power supply to store and recall power SAV supply states except for output on off Each state includes RCL voltage Ist and 2nd rank current Ist and 2nd rank soft voltage and current limit delay time service request on off foldback Ist and 2nd rank mask Ist and 2nd rank and hold Initial condition Each register is initiated to the turn on values STS This command reads the contents of the status register which STAT OPER COND maintains the present status of the power supply STAT QUES COND ESE ASTS This command reads the contents of the accumulated status STAT OPER register which stores any bit condition entered in the status STAT QUES register since the accumulated status register was last read ESE regardless of whether the condition still exists UNMASK These commands determine the conditions that will set bits inthe STAT OPER ENAB mnemonics fault register allowing the operator to define the conditions that STAT QUES ENAB UNMASK will be reported as faults Fault conditions can be enabled by KSE XXX sending a string of status register mnemonics after the UNMASK command The
165. t Pin 4 is the digital ground Bit position 2 normally serves as an output To change it to an input it must first be programmed high The DIG DATA query returns the last programmed value in bits 0 and 1 and the value read at pin 3 in bit 2 The bits are turned on and off in straight binary code as follows Digital I O Port Programming Chart Bit Bit Configuration Pin Configuration Configuration Pin Configuration Value 0 1 2 1 2 3 4 Value 0 1 2 1 2 3 4 0 lo o0 0 Lo Lo Output Gnd 4 0 0 1 Lo Lo Input Gnd 1 1 0 0 Hi Lo Output Gnd 5 1 0 1 Hi Lo Input Gnd 2 lo 1 0 Lo Hi Output Gnd 6 0 1 1 Lo Hi Input Gnd 3 1 1 O Hi Hi Output Gnd 7 1 1l 1 Hi Hi_Input_ Gn Pins 1 and 2 are always outputs Command Syntax SOURce DIGital DATA VALuel lt NRf gt Parameters 0to7 Suffix None RST Value 0 Examples DIG DATA7 DIGITAL DATA VALUE 7 Query Syntax SOURce DIGital DATA Returned Parameters lt NRI gt Values from 0 to 7 Related Commands RST RCL SAV Display Subsystem This subsystem controls the state and output of the alphanumeric portion of the display DISP Enables or disables the display When disabled the display characters are blank The annunciators are not affected by this command Command Syntax DISPlay WINDow STATe lt bool gt Parameters 0111 OFF ON Suffix None RST Value ON Examples DISP ON DISPLAY STATE ON Query Syntax DISPlay WINDo
166. the VXI plug amp play instrument driver make sure that you have one of the supported applications installed and running on your computer Access Agilent Technologies Web site at http www agilent com find drivers Select the instrument for which you need the driver Click on the driver either Windows 95 or Windows NT and download the executable file to your pc Locate the file that you downloaded from the Web From the Start menu select Run lt path gt agxxxx exe where lt path gt 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 6 To use the VXI plug amp play instrument driver follow the directions in the VXI plug amp play online help under Introduction to Programming WN 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 e To access the online help when you have chosen the default Vxipnp start folder click o
167. the character will not be rejected but will be displayed as a starburst all 16 segments of the character will light Command Syntax Parameters RST Value Examples Query Syntax Returned Parameters Related Commands Note DISPlay WINDow TEXT DATA lt STR gt See LCD character set DISP TEXT DEFAULT_MODE DISPLAY WINDOW TEXT DATA 533 2E 1VOLTS DISPlay WINDow TEXT lt STR gt Last programmed text string DISP DISP MODE RST IEEE Standard Digital Interface for Programmable Instrumentation requires that a string be enclosed in either single or double quotes Language Dictionary 75 Initiate Subsystem This subsystem enables the trigger system INIT INIT CONT When a trigger is enabled with this command an event on a selected trigger source causes the specified trigging action to occur If the trigger subsystem is not enabled all trigger commands are ignored If INIT CONT is OFF then INIT enables the trigger subsystem only for a single trigger action The subsystem must be enabled prior to each subsequent trigger action If INIT CONT is ON then the trigger subsystem is continuously enabled and INIT is redundant Command Syntax Parameters RST Value Examples Query Syntax Returned Parameters Related Commands Measure Subsystem This subsystem returns output measurements MEAS CURR MEAS VOLT INITiate IMMediate INITiate CONTinuous lt bool gt For INIT IMM _ None Fo
168. the relay option sending either relay command generates an error Command Syntax OUTPut RELay STATe lt bool gt Parameters 0111OFFION RST Value 0 Examples OUTP REL1 OUTP REL OFF Query Syntax OUTPput RELay Returned Parameters 0 1 Related Commands OUTP STAT RCL SAV OUTP REL POL This command is valid only if the power supply is configured for the optional relay connector Programming NORMal causes the relay output polarity to be the same as the power supply output Programming REVerse causes the relay output polarity to be opposite to that of the power supply output If OUTP STAT ON when either relay command is sent the power supply output voltage is set to 0 during the time that the relays are changing polarity If the power supply is not configured for the relay option sending either relay command generates an error Command Syntax Parameters RST Value Examples Query Syntax Returned Parameters Related Commands OUTPut RELay POLarity lt CRD gt NORMal REVerse NORM OUTP REL POL NORM OUTPput RELay POLarity NORM REV OUTP STAT RCL SAV Status Subsystem This subsystem programs the power supply status registers The power supply has three groups of status registers Operation Questionable and Standard Event The Standard Event group is programmed with Common commands as described in Chapter 8 Status Reporting The Operation and Questionable status groups each consist of the Condition Enable
169. tifies the replacement fuse See In Case of Trouble in Chapter 3 for instructions on fuse replacement Installing the Power Cord WARNING Installation of the power cord must be done by a qualified electrician and in accordance with local electrical codes 18 Installation The power cord supplied with power supply may or may not include a power plug see Options in Chapter 1 at one end of the cord Terminating connections and a ground lug are attached to the other end of the cord See Figure 2 2 and proceed as follows 1 If they are not already in place position the strain relief connector a safety cover 8 rubber boot and connector nut 8 on the power cord 2 Secure the ground wire 2 to the chassis earth ground stud 3 For single phase operation connect the neutral wire to the N input terminal and the line wire to the L input terminal this line is fused inside the unit 4 For line to line operation from a three phase source as shown in Figure 2 3 connect one phase to the N input terminal and another phase to the L input terminal this line is fused inside the unit Note The N terminal is not internally grounded 5 Position the safety cover over the power input terminals and tighten the cover screws and strain relief connector screws 6 A phase B phase mn t nie eE ae Earth Safety Ground 208 Volts typ 120 Volts typ ales Conase PRR EN are made trom i t
170. tion until they can be repaired by qualified service personnel Safety Symbol Definitions Description Symbol Description Direct current L Terminal for Line conductor on permanently installed equipment Alternating current A Caution risk of electric shock Both direct and alternating current AA Caution hot surface cael Three phase alternating current A Caution refer to accompanying documents Earth ground terminal In position of a bi stable push control Protective earth ground terminal Out position of a bi stable push control odes Frame or chassis terminal Lie On unit N Terminal for Neutral conductor on Off unit permanently installed equipment Terminal is at earth potential Standby unit Used for measurement and control O Units with this symbol are not completely circuits designed to be operated disconnected from ac mains when this switch is with one terminal at earth off To completely disconnect the unit from ac potential mains either disconnect the power cord or have a qualified electrician install an external switch The WARNING sign denotes a hazard The CAUTION sign denotes a hazard It calls f CAUTION 5 It calls attention to a procedure attention to an operating procedure or the like practice or the like which if not which if not correctly performed or adhered to could correctly performed or adhered to result in damage to or destruction of part or all of the could result in per
171. tions this product must be returned to a service facility designated by Agilent Technologies Customer shall prepay shipping charges by and shall pay all duty and taxes for products returned to Agilent technologies for warranty service Except for products returned to Customer from another country Agilent Technologies shall pay for return of products to Customer Warranty services outside the country of initial purchase are included in Agilent Technologies product price only if Customer pays Agilent Technologies international prices defined as destination local currency price or U S or Geneva Export price If Agilent Technologies is unable within a reasonable time to repair or replace any product to condition as warranted the Customer shall be entitled to a refund of the purchase price upon return of the product to Agilent Technologies LIMITATION OF WARRANTY The foregoing warranty shall not apply to defects resulting from improper or inadequate maintenance by the Customer Customer supplied software or interfacing unauthorized modification or misuse operation outside of the environmental specifications for the product or improper site preparation and maintenance NO OTHER WARRANTY IS EXPRESSED OR IMPLIED AGILENT TECHNOLOGIES SPECIFICALLY DISCLAIMS THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE EXCLUSIVE REMEDIES THE REMEDIES PROVIDED HEREIN ARE THE CUSTOMER S SOLE AND EXCLUSIVE REMEDIES AGILENT
172. to make use of this information you must refer to Chapter 8 Status Reporting which explains how to read specific register bits and use the information that they return S lt NRf gt SAV lt NRf gt 09010 fi SRE STB TRG TST FIG3 1 GAL Figure 7 1 Common Commands Syntax Diagram CLS Meaning and Type Clear Status Device Status Description This command causes the following actions see Chapter 8 Status Reporting for descriptions of all registers Clears the following registers e Standard Event Status Operation Status Event Questionable Status Event Status Byte Clears the Error Queue If CLS immediately follows a program message terminator lt NL gt then the output queue and the MAV bit are also cleared Command Syntax CLS Parameters None Query Syntax None 64 Language Dictionary ESE Meaning and Type Event Status Enable Device Status Description This command programs the Standard Event Status Enable register bits The programming determines which events of the Standard Event Status Event register see ESR are allowed to set the ESB Event Summary Bit of the Status Byte register A 1 in the bit position enables the corresponding event All of the enabled events of the Standard Event Status Event register are logically ORed to cause the Event Summary Bit ESB of the Status Byte register to be set See Chapter 4 Status Reporting f
173. types of SCPI message formats data types or common commands The above two documents are available from the IEFE Institute of Electrical and Electronics Engineers 345 East 47th Street New York NY 10017 USA The WEB address is www ieee org Remote Programming 45 GPIB Capabilities of the Power supply All power supply functions except for setting the GPIB address are programmable over the IEEE 488 bus also known as the General Purpose Interface Bus or GPIB The IEEE 488 1 capabilities of the power supply are listed in the Supplemental Characteristics in Table A 2 The power supply operates from a GPIB address that is set from the front panel see System Considerations at the end of this chapter Introduction To SCPI Important Learn the basics of power supply operation see Chapter 5 Front Panel Operation before using SCPI SCPI Standard Commands for Programmable Instruments is a programming language for controlling instrument functions over the GPIB IEEE 488 instrument bus SCPI is intended to function with standard GPIB hardware and conforms to the IEEE Standard Digital Interface for Programmable Instrumentation SCPI is layered on top of the hardware portion of IEEE 488 2 The same SCPI commands and parameters control the same functions in different classes of instruments For example you would use the same DISPlay command to control the power supply display state and the display state of a SCPI compatible multimeter
174. uage and interface Note The examples are followed by sample program code written for three popular types of BASIC controlled GPIB interfaces Important The power supply responds simultaneously to both digital and analog progamming inputs If it is receiving an input over the GPIB and a corresponding input from the front panel and or from the analog programming port the power supply output will be the algebraic sum of the inputs 52 Remote Programming Programming Voltage and Current The following statements program both voltage and current and return the actual output from the sense terminals OUTP OFF Disable the output VOLT 45 CURR 25 Program the voltage and current VOLT CURR Read back the programmed levels OUTP ON Enable the output MEAS VOLT MEAS CURR Read back the outputs from the sense terminals Programming Protection Circuits This example programs the voltage and current programs an overvoltage protection value and turns on the overcurrent protection It then reads back all the programmed values VOLT LEV 45 PROT 47 5 Program the voltage and overvoltage protection CURR LEV 25 PROT STAT ON Program the current and overcurrent protection VOLT LEV PROT CURR LEV PROT STAT Read back the programmed values Note the required use of the optional LEVel header in the above example see The Effect of Optional Headers given previously Changing Outputs by Trigger If you do not program pending trig
175. urns RQS in bit 6 The MSS Bit This is a real time unlatched summary of all Status Byte register bits that are enabled by the Service Request Enable register MSS is set whenever the power supply has at least one reason and possibly more for requesting service Sending STB reads the MSS in bit position 6 of the response No bits of the Status Byte register are cleared by reading it The RQS Bit Whenever the power supply requests service it sets the SRQ interrupt line true and latches RQS into bit 6 of the Status Byte register When the controller services the interrupt RQS is cleared inside the register and returned in bit position 6 of the response The remaining bits of the Status Byte register are not disturbed Output Queue The Output Queue is a first in first out FIFO data register that stores power supply to controller messages until the controller reads them Whenever the queue holds one or more bytes it sets the MAV bit 4 of the Status Byte register If too many unread error messages are accumulated in the queue a system error message is generated see Table 9 1 in Chapter 9 Error Messages The Output Queue is cleared at power on and by CLS Service Request Enable Register This register is a mask that determines which bits from the Status Byte register will be ORed to generate a service request SRQ The register is programmed with the SRE common command When the register is cleared no service requests can be g
176. utomatic turn on selftest Pushbutton nonvolatile storage and recall of up to 5 operating states Local or remote sensing of output voltage Auto parallel operation for increased total current Series operation for increased total voltage Analog input for remote programming of voltage and current Voltage output for external monitoring of output current User calibration from the front panel Front Panel Programming The front panel has both rotary RPG and keypad controls for setting the output voltage and current The panel display provides digital readouts of the output voltage and current Other front panel controls permit Enabling or disabling the output Setting the overvoltage protection OVP trip voltage Enabling or disabling the overcurrent protection OCP feature Saving and recalling operating states Setting the GPIB address Reading GPIB error message codes Calibrating the power supply including changing the calibration protection password Remote Programming The power supply may be remotely programmed via the GPIB bus and or from an analog input port GPIB programming is with SCPI Standard Commands for Programmable Instruments commands that make the power supply programs compatible with those of other GPIB instruments A software Compatibility mode also permits programming in the command set of the Agilent 6030xA Autoranging Series In addition to control functions SCPI programming permits writing to the fr
177. w STA Te Returned Parameters lt NRI gt 0 or 1 Related Commands DISP MODE DISP TEXT RST 74 Language Dictionary DISP MODE Switches the display between its normal metering mode and a mode in which it displays text sent by the user The command uses the character data lt CRD gt format Command Syntax Parameters RST Value Examples Query Syntax Returned Parameters Related Commands DISP TEXT DISPlay WINDow MODE NORMalITEXT lt CRD gt NORMal TEXT NORM DISP MODE NORM _ DISPLAY MODE NORMAL DISPLAY WINDOW MODE TEXT DISPlay WINDow MODE lt CRD gt NORMAL or TEXT DISP DISP TEXT RST Allows character strings to be sent to display The characters will be displayed when the display mode is TEXT The LCD has the following character set LCD Character Set uppercase letters digits punctuation blank space A through Z Case sensitive entry 0 through 9 _l lt gt A display is capable of showing up to 12 characters However the three punctuation characters do not count toward the 12 character limit when they are preceded by an alphanumeric character When punctuation characters are included then the maximum number of characters alphanumeric punctuation that can be displayed is 15 If it exceeds the display capacity a message will be truncated to fit and no error message will be generated If any character in the message is not a member of the above character set
178. x OA End or identify lt END gt Both of the above lt NL gt lt END gt In the examples of this manual there is an assumed message terminator at the end of each message If the terminator needs to be shown it is indicated as lt NL gt regardless of the actual terminator character 50 Remote Programming SCPI Data Formats All data programmed to or returned from the power supply is ASCII The data may be numerical or character string Numerical Data Table 6 1 and Table 6 2 summarize the numerical formats Table 6 1 Numerical Data Formats Symbol Data Form Talking Formats lt NRI gt Digits with an implied decimal point assumed at the right of the least significant digit Examples 273 0273 lt NR2 gt Digits with an explicit decimal point Example 273 0273 lt NR3 gt Digits with an explicit decimal point and an exponent Example 2 73E 2 273 0E 2 Listening Formats lt NRf gt Extended format that includes lt NR1 gt lt NR2 gt and lt NR3 gt Examples 273 273 2 73E2 lt NRf gt Expanded decimal format that includes lt NRf gt MIN and MAX Examples 273 273 2 73E2 MAX MIN and MAX are the minimum and maximum limit values that are implicit in the range specification for the parameter Table 6 2 Suffixes and Multipliers Class Suffix Unit Unit with Multiplier Current A Ampere MA milliampere Amplitude Vv Volt MV millivolt Time S second MS millisecond Common Multipliers 1E3 K kilo

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