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KLP073008

3-19

3.5.2

KLP VISA INSTRUMENT DRIVER

The VISA instrument driver simplifies programming with a VISA compatible GPIB controller. and
Includes 1) source code (C) for all VISA functions, and 2) a complete programming reference
manual which can be used to program one or more KLP power supplies using a virtual front
panel observed on a computer monitor.

Download the latest VISA driver from the Kepco website at

http://www.kepcopower.com/drivers.htm

Although the software drivers supplied by Kepco are VISA compliant, they also require the
installation of the proper 16-bit VISA driver from your GPIB card supplier. Many vendors supply
this software with the hardware; National Instruments (http://www.natinst.com) has the driver for
their cards available on the internet at a file transfer site (ftp://ftp.natinst.com — find the folder
for support and VISA drivers). The driver to be installed is the win16 driver, even if your system
is running under Windows 95 or Windows NT.

3.6

SCPI PROGRAMMING

SCPI (Standard Commands for Programmable Instruments) is a programming language con-
forming to the protocols and standards established by IEEE 488.2 (reference document

ANSI/IEEE Std 488.2, IEEE Standard Codes, Formats, Protocols, and Common Commands

). SCPI

commands are sent to the KLP Power Supply as ASCII output strings within the selected pro-
gramming language (PASCAL, BASIC, etc.) in accordance with the manufacturer’s require-
ments for the particular GPIB controller card used.

Different programming languages (e.g., BASIC, C, PASCAL, etc.) have different ways of repre-
senting data that is to be put on the IEEE 488 bus. It is up to the programmer to determine how
to output the character sequence required for the programming language used. Address infor-
mation (GPIB address) must be included before the command sequence. (See PAR.3.5.1 to
establish the KLP Power Supply GPIB address.)

SPE

Serial Poll Enable

Received

SRQ

Service Request

Sent

UNL

Unlisten

Received

UNT

Untalk

Received

TABLE 3-4. IEEE 488 (GPIB) BUS DATA MODE MESSAGES

MNEMONIC

MESSAGE DESCRIPTION

COMMENTS

DAB

Data Byte

Received or Sent

END

End

Received or Sent

EOS

End of String

Received or Sent

RQS

Request Service

Sent

STB

Status Byte

Sent

TABLE 3-3. IEEE 488 (GPIB) BUS COMMAND MODE MESSAGES (CONTINUED)

MNEMONIC

MESSAGE

DESCRIPTION

COMMENTS

«
...
57
58
59
60
61
...
»

Содержание KLP SERIES

Страница 1: ...contact your nearest Kepco Representative or the Kepco Docu mentation Office in New York 718 461 7000 requesting the correct revision for your particular model and serial number 3 The contents of this...

Страница 2: ......

Страница 3: ...USA Importer s Name and Address Type of Equipment Component Power Supply Model No PRODUCT MODEL NUMBER Year of Manufacture I the undersigned declare that the product specified above when used in conj...

Страница 4: ...wire grounded mains connection See wiring section of this manual for complete electrical wiring instructions EN61010 1 2001 Cl 6 10 1 4 This power supply has secondary output circuits that are conside...

Страница 5: ...rforming any servicing The PROTECTIVE EARTHING CONDUCTOR TERMINAL must properly con nected prior to application of source power to the product see instructions on instal lation herein in order to ensu...

Страница 6: ......

Страница 7: ...ols and Indicators 2 1 2 2 2 Rear Panel Connectors and Switch 2 1 2 3 Source Power Requirements 2 5 2 4 Cooling 2 5 2 5 Preliminary Operational Check 2 5 2 6 Installation 2 6 2 6 1 Rack Mounting 2 6 2...

Страница 8: ...Storage of User programmed Active Settings 3 13 3 3 1 2 User determined output Sequences 3 13 3 3 1 3 External Triggering 3 14 3 3 1 4 Internal Relay Configuration 3 14 3 4 RS232 C Operation 3 14 3 4...

Страница 9: ...urrent Calibration Local 4 3 4 3 3 External Calibration Local 4 3 4 3 4 Calibration Exit Local 4 4 4 4 Calibration using VISA Driver Demo Program Soft Panel 4 4 4 4 1 Voltage Calibration VISA Demo 4 5...

Страница 10: ...ct DELay Command B 8 B 34 OUTPut STATe PROTect DELay Query B 8 B 35 SOURce CURRent LEVel IMMediate AMPlitude Command B 8 B 36 SOURce CURRent LEVel IMMediate AMPlitude Query B 8 B 37 SOURce CURRent LIM...

Страница 11: ...OMMunication SERial ENAB Query B 17 B 74 SYSTem COMMunication SERial PACE Command B 17 B 75 SYSTem COMMunication SERial PACE Query B 18 B 76 SYSTem COMMunication SERial PROMpt Command B 18 B 77 SYSTem...

Страница 12: ...age Structure 3 23 3 3 Tree Diagram of SCPI Commands Used with KLP Power Supply 3 25 3 4 Status Reporting Structure 3 27 3 5 Typical Example Of KLP Power Supply Program Using SCPI Commands 3 29 3 6 An...

Страница 13: ...Error Codes 3 2 3 2 IEEE 488 GPIB Bus Interface Functions 3 18 3 3 IEEE 488 GPIB Bus Command Mode Messages 3 18 3 4 IEEE 488 GPIB Bus Data Mode Messages 3 19 3 5 Rules Governing Shortform Keywords 3 2...

Страница 14: ...viii KLP073008 FIGURE 1 1 KLP SERIES POWER SUPPLY...

Страница 15: ...d maximum voltage at rated current parameters define the virtual models avail able within the limit of 1200 Watts of output power see Figure 1 2 KLP power supplies operate from wide range 88 255V a c...

Страница 16: ...A 36V 0 8A 0 60A 20V 60A 10 mV 125 mV 83 KLP 75 33 1200 0 75V 16A 75V 0 4A 0 33 3A 36V 33 3A 10 mV 125 mV 84 KLP 150 16 1200 0 150V 8A 150V 0 2A 0 16A 75V 16A 10 mV 125 mV 86 KLP 300 8 1200 0 300V 4A...

Страница 17: ...justment range voltage 0 100 of rated voltage no minimum load required current 0 100 of rated current no minimum load required Source effect voltage 0 01 Emax over full source range current 0 01 Imax...

Страница 18: ...safety covers 75 600V models Shocksafe Euroblock Analog programming port 15 pin D sub Digital programming port primary Standard GPIB connector IEEE 488 2 GPIB secondary 9 pin D sub RS 232 Direct outp...

Страница 19: ...grammable functions PAR 2 7 10 Programming time 20 milliseconds 10 to 90 Eout PROGRAMMING CHARACTERISTICS DIGITAL Digital remote control isolation Safety Extra Low Voltage SELV referenced to chassis f...

Страница 20: ...1 6 KLP 073008 FIGURE 1 3 KLP SERIES POWER SUPPLY MECHANICAL OUTLINE DRAWING SHEET 1 OF 2 R DWG MECH 3010266...

Страница 21: ...KLP 073008 1 7 FIGURE 1 3 KLP SERIES POWER SUPPLY MECHANICAL OUTLINE DRAWING SHEET 2 OF 2...

Страница 22: ...ectly via either the IEEE 488 2 GPIB or RS232 ports using SCPI commands Most features available in local mode can be accessed in remote mode through dig ital programming as well as some that are only...

Страница 23: ...the KLP to produce a variety of sequential output operations Each memory location accommodates a value for voltage and current and a dwell time how long the parameter is to be in effect Values are st...

Страница 24: ...wer supply in either series for higher voltage or parallel for redundancy or higher current the master slave feature allows a single power supply the master to automatically control both outputs to ac...

Страница 25: ...1m long Connect KLP Power Supply to GPIB bus SNC 488 1 IEEE 488 GPIB Cable 2m long Connect KLP Power Supply to GPIB bus SNC 488 2 IEEE 488 GPIB Cable 4m long Connect KLP Power Supply to GPIB bus SNC...

Страница 26: ......

Страница 27: ...r Turns the power supply on or off Applies input power to power supply internal circuits Circuit breaker provides input overload protection 2 VOLTAGE control switch Multifunction rotary encoder with m...

Страница 28: ...rd and perform calibra tion PAR 4 3 9 DC OUTPUT indicator Green LED lights when DC output is enabled LED is off when output is disabled 10 DC OUTPUT on off switch Enables or disables the DC Output Whe...

Страница 29: ...r up sequence see PAR 3 2 6 3 If not selected OFF default condition the stored values will be 0 volts minimum amps The switch setting is detected upon unit power up ON Save and recall previous set poi...

Страница 30: ...4 for relay energized condition 1 3 Vref Analog signal which programs output voltage from zero to full scale Voltage or resistance program ming is selected via DIP switch position 1 See Table 2 2 Ref...

Страница 31: ...tallation is advisable to ascertain whether the power supply has suffered damage resulting from shipping Refer to Figures 2 1 and 2 2 for location of operating controls and electrical connections Tabl...

Страница 32: ...t Verify DC OUTPUT indicator lights 8 Compare the programmed output voltage value step 5 with the voltage reading of the DVM the difference between the two should not exceed 0 05 of the maximum voltag...

Страница 33: ...put Voltage The input power circuit breaker of the power supply is rated to support rated load power under worst case efficiency conditions at the lowest rated source voltage 100V a c and provides the...

Страница 34: ...oint The exact location of the best d c ground point is entirely dependent upon the specific applica tion and its selection requires a combination of analysis good judgement and some amount of empiric...

Страница 35: ...power leads it cannot completely compensate for the undesirable output effects of the power lead inductance These lead impedances both power and sensing leads are especially important if the load is...

Страница 36: ...3 2 10 2 7 7 PARALLEL REDUNDANT OPERATION Identical KLP power supply models may be connected in parallel in order to provided increased output current to a common load see Figure 2 5 This permits the...

Страница 37: ...KLP HV 073008 2 11 FIGURE 2 4 SERIES CONNECTION USING REMOTE SENSING FIGURE 2 5 PARALLEL CONNECTIONS USING REMOTE SENSING...

Страница 38: ...o each other as possible with power termina tions bussed together using adequately sized interconnections the power supply load inter connections should be distributed evenly along the power supply ou...

Страница 39: ...Y_NO pin 2 respectively be twisted together with RELAY_COM pin 4 as needed to eliminate noise pickup See PAR 3 2 11 3 to configure internal relay f External Trigger EXT_TRIG External Trigger may be us...

Страница 40: ......

Страница 41: ...s set points and limits Status and fault indications are provided by a 4 character alpha numeric display 3 2 1 TURNING THE POWER SUPPLY ON 1 To turn the power supply on set POWER ON OFF circuit breake...

Страница 42: ...remote mode all front panel controls are disabled If desired local mode can be restored by pressing both VOLTAGE and CURRENT controls simultaneously the power supply will then remain in local mode un...

Страница 43: ...s display will read aRwl Remote with Local Lockout Once the front panel is locked it can only be unlocked by either of the following turn the power supply off set ANALOG I O DIP switch position 5 to O...

Страница 44: ...ual model settings are password protected see PAR 4 5 NOTE Decreasing full scale voltage and or current does not improve programming resolution A multitude of possible 1200W power supplies may be emul...

Страница 45: ...utput power at 1200 Watts Maximum current shown on DC AMPERES display is automatically limited to 1200W maximum 5 Press DC OUTPUT switch to accept virtual model settings The unit displays done then re...

Страница 46: ...etpoint mode both coarse rotate the control and fine rotate while pressing control in adjustment is available The coarse adjustment is approximately 100X the fine adjust ment resolution Setpoint adjus...

Страница 47: ...ge and overcurrent protection setpoints while the PROTECT switch is held in 2 To change the values operate the corresponding adjustment control while holding the PRO TECT switch in When the PROTECT sw...

Страница 48: ...repeatedly until the status display reads M S 3 Tap the DC OUTPUT switch once The status display reads either SERI series or PARA parallel The DC VOLTS display shows the number assigned to the unit 1...

Страница 49: ...ycle as follows status display will flash E241 hardware error then DC VOLTS status display and DC AMPERES flash x OF y where x unit number and y total number of units the status display flashes the ty...

Страница 50: ...rent A to D calibration voltages see PAR 3 2 11 5 LBT Loop Back Test used to isolate RS 232 communication problems see PAR 3 4 2 4 CAL Display last calibration date and or begin Calibration see PAR 3...

Страница 51: ...C to constant voltage CV mode MAN Relay on off is controlled manually directly from the front panel see below LIST Relay on off is controlled remotely using LIST commands via GPIB or RS 232 interface...

Страница 52: ...ot is ON or OFF 1 Press in and turn either VOLTAGE or CURRENT control until the desired quick boot state is displayed 2 Press DC OUTPUT switch to save The program then advances to the next item in the...

Страница 53: ...te details regarding digital commands and queries refer to Appendix A IEEE 488 2 Commands Queries and Appendix B SCPI Commands Queries 3 3 1 1 STORAGE OF USER PROGRAMMED ACTIVE SETTINGS The KLP Power...

Страница 54: ...is reset to the default minimum and an error message notes that the requested value is out of range 3 3 1 4 INTERNAL RELAY CONFIGURATION The internal relay contacts available at pins 6 7 and 8 of the...

Страница 55: ...turns on the echo mode upon receipt of the character The character turns off the echo mode The message echo off or echo on will be displayed to confirm this 3 4 2 RS 232 IMPLEMENTATION The following p...

Страница 56: ...efault method of ensuring data is transferred without errors Each byte char acter is echoed back to the sender where it is verified as the same character that was just sent If the character is incorre...

Страница 57: ...it reads PASS the power sup ply is defective and requires repair 4 Install the loop back test connector 195 0112 see Table 1 4 at the RS 232 port located on the rear panel of the power supply J3 Figur...

Страница 58: ...st condition Remote Local RL1 Complete capability Interface selects either local or remote information In local mode the KLP executes front panel commands but can be set to remote mode via IEEE 488 bu...

Страница 59: ...is a programming language con forming to the protocols and standards established by IEEE 488 2 reference document ANSI IEEE Std 488 2 IEEE Standard Codes Formats Protocols and Common Commands SCPI co...

Страница 60: ...bsystem commands used in the KLP Power Supply with the root at the left side and specific commands forming the branches The following paragraphs introduce the subsystems sub system commands are define...

Страница 61: ...memory The equipment required for calibration is specified in PAR 4 2 Because the voltage measured will be used as reference for calibration the DVM itself must be calibrated accurately During voltag...

Страница 62: ...ing an arbitrary short form such as ENABL for ENAB ENABLE or IMME for IMM IMMEDIATE will result in an error Regardless of which form chosen you must include all the letters required by that form To id...

Страница 63: ...colon that precedes the first keyword of a program message This places the parser at the root top left Figure 3 3 of the command tree Note the difference between using the colon as a keyword separato...

Страница 64: ...message The root level keyword SOURce is an optional keyword Starting at the root there are various branches or paths corresponding to the subsystems The root keywords for the KLP Power Supply are AB...

Страница 65: ...T subsystem LIST CLE CONT CONT COUN SKIP SKIP COUN CURRent LEVel val LEVel POINt DIR DIR DWELl DWELl POINt QUERy QUERy VOLTage LEVel val LEVel POINt SOURce subsystem SOURce VOLTage LEVel IMMediate AMP...

Страница 66: ...g form has the same effect as INST short form Commands queries may be given in upper lower case long form e g SoUrCe is allowed Text shown between brackets is optional e g SOUR VOLT LEV TRIG has the s...

Страница 67: ...ge error is detected the event registers bit 0 is set The 1 in the event register causes bit 3 of the status byte to be asserted The Service Request register is ANDed with its enable register for all...

Страница 68: ...lity due to some condition affecting the parameter associ ated with that bit 0 Overvoltage Error 1 indicates an overvoltage fault has been detected 1 Overcurrent Error 1 indicates an overcurrent fault...

Страница 69: ...RELAY_COM pin 4 RELAY_NC pin 10 voltage and current readbacks VOLT_RBACK pin 6 and CURR_RBACK pin 7 external trigger EXT_TRG pin 14 and remote inhibit REM_INH pin 8 3 7 1 ENABLING DISABLING THE OUTPUT...

Страница 70: ...ON Local controls locked 3 Configure Analog I O Port J1 Figure 2 2 by referring to Table 2 6 and Figure 3 6 grounding J1 pin 12 enables analog programming FIGURE 3 6 ANALOG PROGRAMMING OF OUTPUT VOLTA...

Страница 71: ...controls locked 3 Configure Analog I O Port J1 Figure 2 2 by referring to Table 2 6 and Figure 3 7 grounding J1 pin 12 enables analog programming 4 Refer to PAR 3 7 4 to change overvoltage or overcur...

Страница 72: ...AGE and CURRENT adjustment con trols at the same time If the panel is locked and RS 232 or GPIB access is not possible turn the power supply off set ANALOG I O DIP switch position 5 to OFF and then po...

Страница 73: ...ode PAR 4 4 4 Calibration of the BOP is performed in one of two ways locally using the front panel controls PAR 4 3 or remotely using the graphical interface supplied with the instrument driver avail...

Страница 74: ...UT switch to accept the number 8 If password is incorrect the status display reads ERR Repeat step 7 to enter the correct password or press the FUNCTION switch to exit calibration 9 If password is cor...

Страница 75: ...4 Tap the DC OUTPUT switch to accept the value The status display reads CMAX Rotate the CURRENT control to increase or decrease the DVM reading until the DVM reading corre sponds as close as possible...

Страница 76: ...bration date is displayed with the first digit blinking as a starting point to enter the current date Rotate either the VOLT AGE or CURRENT controls to change the digit then tap either control to move...

Страница 77: ...ion PAR 4 4 2 for current calibration PAR 4 4 3 for external calibration or PAR 4 4 4 to exit calibration 4 4 1 VOLTAGE CALIBRATION VISA DEMO During voltage calibration the voltage voltage readback an...

Страница 78: ...Port J2 pin 7 and DVM to pin 13 Click the button to increase and the to decrease the output current until the DVM reads as close as pos sible to 10V 6 Click the PRESS TO ACCEPT button to accept the v...

Страница 79: ...mum rated voltage and current is set to the value corresponding to 1200 Watts If a current calibration is completed but no Voltage calibration the vir tual model current will be set for maximum rated...

Страница 80: ...moved to Previous and the new calibration values are stored in Working It is possible to replace the Working calibration values with either the Previous or the Factory calibration values contact Kepco...

Страница 81: ...e whole number 0 to 255 per Table A 2 Default Value 0 Description This command programs the standard Event Status Enable register bits The contents function as a mask to determine which events of the...

Страница 82: ...see PAR B 28 Any 4xx type error sets the Query error bit 2 Related Commands CLS ESE OPC See example Figure A 1 A 6 IDN IDENTIFICATION QUERY IDN Syntax IDN Return value Character string Description Id...

Страница 83: ...date of last calibration Axxxxxx indicates unit serial number and Vx xx indicates firmware revision OPC Directs status bit 0 to be set once pending operations are completed OUTP ON Enables output NOT...

Страница 84: ...te on or off is also saved The following parameters are stored by SAV VOLT CURR OUTP and VOLT PROT CURR PROT The stored values can be restored by the RCL com mand NOTE If a Virtual Model setting see P...

Страница 85: ...mmands SRE SRE See example Fig ure A 1 A 15 TRG TRIGGER COMMAND TRG Syntax TRG Description Triggers the power supply to be commanded to preprogrammed values of output current and voltage When the trig...

Страница 86: ......

Страница 87: ...OUR LIST COUN SKIP B 14 B 15 STAT QUES COND B 63 SOUR LIST CURR B 16 B 17 STAT QUES ENAB B 64 B 65 SOUR LIST CURR POIN B 18 SYST COMM GPIB ADDR B 66 B 67 SOUR LIST DIR B 19 B 20 SYST COMM SER BAUD B 6...

Страница 88: ...le Figure B 1 B 4 CAL COMMANDS AND QUERIES CAL CAL commands and queries are used to perform calibration of the unit via the control interface These commands must be issued in a specific sequence in or...

Страница 89: ...ng virtual model limits OUTP ON Enables output OUTP Returns 1 output enabled VOLT 75 CURR 1 5E 1 Programs output voltage to 75V current limit to 0 15A INIT CONT ON Enables continuous triggering INIT C...

Страница 90: ...LIST COUNt SKIP nn nn int_value 0 to 255 Description Allows beginning steps of list generated waveform to be run once then ignored When a list is to be repeated using LIST COUNT this command allows t...

Страница 91: ...OURce LIST DIRection QUERY LIST DIR Syntax Short Form LIST DIR Long Form LIST DIRection Return Value value UP or DOWN Description Identifies the for executing the list established by LIST DIR Related...

Страница 92: ...Starting at location established by LIST QUER returns comma separated list of up to 16 values indicating the main channel parameters entered i e the contents of the main channel List Data Table Relat...

Страница 93: ...LT POIN Returns 3 indicating that 3 data points have been entered also indi cates that the next data location to be filled is Location 3 LIST QUER Returns 0 indicating list starting point default loca...

Страница 94: ...Returns the programmed delay before the energizing Active only if relay control is set to FLT mode and either option C V or V C is selected See PAR 3 2 11 3 for details B 35 SOURce CURRent LEVel IMMed...

Страница 95: ...H Return Value exp_value digits with decimal point and Exponent e g 2 71E 1 for 27 1 Description Returns value representing Virtual Model current limit set by CURR LIM HIGH command Related Commands CU...

Страница 96: ...Table 1 2 This value is determined at the factory and cannot be changed by the user CURR PROT MIN returns the minimum current protection value see Table 1 1 See example Figure B 4 Description Returns...

Страница 97: ...following example assumes KLP 75 33 1200 with virtual model set for 36V 33 33A and output operating in current stabilization mode See Figure B 3 for directions on programming virtual model limits VOL...

Страница 98: ...ly always 0 Related Commands VOLT See example Figure B 5 B 49 SOURce VOLTage LIMit HIGH COMMAND VOLT LIM HIGH Syntax Short Form SOUR VOLT LIM HIGH exp_value Long Form SOURce VOLTage LIMit HIGH exp_val...

Страница 99: ...vervoltage range for the power supply model error message 222 Data out of range is posted in the output queue If the power supply output exceeds the voltage protection level programmed then the power...

Страница 100: ...ing mode if load resistance is greater than 21 8 0 5 output will operate as voltage stabilizer MEAS VOLT Returns measured output voltage approximately 2 18E1 21 8V assuming voltage stabilizer operatio...

Страница 101: ...ion Event register The Operation Event register is a read only register which holds latches all events that occur Reading the Operation Event register clears it See example Figure B 6 NOTE The power s...

Страница 102: ...nable conditions of the power supply Bit set to 1 condition active true bit reset to 0 condition inactive false See example Figure B 6 B 64 STATus QUEStionable ENABle COMMAND STAT QUES ENAB Syntax Sho...

Страница 103: ...l ECHO 1 0 Description Enables 1 ON or disables 0 OFF echo mode see PAR 3 4 2 3 When echo mode is ON causes all subsequent characters to be echoed back When echo mode is OFF turns off the character ec...

Страница 104: ...rst in first out buffer that stores errors as they occur As it is read each error is removed from the queue and the next error message is made available When all errors have been read the query return...

Страница 105: ...COMP causes the unit to respond to older formats such as LIST TIME for compatible operation with software written for KLP power supplies up to Revision 2 9 SYST LANG COMP has NOTE The following exampl...

Страница 106: ...ort Form SYST PASS STAT Long Form SYSTem PASSword STATe Return Value int_value 0 or 1 Description Returns a 1 if the password state is enabled or a 0 if it is disabled B 89 SYSTem SECurity IMMediate C...

Страница 107: ...NATION 0 No error None No error 100 Command error Command Error bit 5 Command and data understood but more information included which is not recognized 102 Syntax error Command Error bit 5 First 4 cha...

Страница 108: ...310 System Failure Device Error bit 3 Program checksum incorrect 311 Memory Error Device Error bit 3 E g power up NV RAM error or CALibrate STORe error 313 Calibration Memory Lost Device Error bit 3...

Страница 109: ...etpoint mode The output can be disabled at any time VOLTS and AMPS dis plays show actual output parameters as determined by the load see PAR 3 2 3 How do I establish the operating mode CV and CC indic...

Страница 110: ...13 or 15 of analog port to adjust the setpoint values for output voltage and current proportionally A maximum combination of programmed voltage and current cannot exceed 1200 watts Programming input...

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