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Operation

Command Reference

Release 1.2

45

Command

Description

VMAX <voltage>

Sets an upper soft limit on the supply’s programmed output voltage. If the 
soft limit is exceeded, or if the soft limit value is lower than the present 
output voltage setting, the supply will ignore the command, turn on the 
ERR LED, and set the ERR bit in the accumulated status register.
Range: 0 to model maximum output voltage (VMAX)
Initial value: model VMAX

VMAX?

Asks for the supply’s soft voltage limit setting.
Response: VMAX <voltage>

VOUT?

Measures the supply’s actual voltage output using the built-in voltage 
readback circuitry.
Response: VOUT <voltage>

VRDAT <Vlo>,<Vhi>

Calculates and records the slope and offset for readback voltage using 
VRLO and VRHI data. Set CMODE ON before using this command. See 
also the calibration procedures in Section 4 .
<Vlo> and <Vhi> are in <voltage> format.

VRHI

The power supply outputs a voltage value to an external voltmeter 
connected as part of the calibration procedure and records a voltage 
readback value internally. These values are at the high end of the 
programmed voltage range. Refer to the output value as VRHI and record it 
to use as input with the VRDAT command. Set CMODE ON before using 
this command. See also the calibration procedures in Section 4.

VRLO

The power supply outputs a voltage value to an external voltmeter 
connected as part of the calibration procedure and records a voltage 
readback value internally. These values are at the low end of the 
programmed voltage range. Refer to the output value as VRLO and record 
it to use as input with the VRDAT command. Set CMODE ON before using 
this command. See also the calibration procedures in Section 4.

VSET <voltage>
or
VSET <-voltage>

Sets the power supply’s output voltage in volts (default) or in millivolts. This 
programmed voltage is the actual output in CV (constant voltage) mode or 
the voltage limit in CC (constant current) mode. 
If you enter a negative voltage value, the power supply will assert a signal 
on the J21-4 user signal line. You can use the user signal to trip external 
relays to switch the output polarity. 
Range: 0 to model maximum output voltage (VMAX)
Initial value: 0 volts

VSET?

Asks for the power supply’s present output voltage setting. Does not apply 
to voltage settings which are being held. See HOLD command.
Response: VSET <voltage>

Содержание GPIB-XPD

Страница 1: ...Operating Manual Internal GPIB Interface for XPD Series Programmable DC Power Supply GPIB XPD...

Страница 2: ......

Страница 3: ...Operating Manual for Internal GPIB Interface for XPD 500 Watt Series Programmable DC Power Supply...

Страница 4: ...to use parts or products of original or improved design in the repair or replacement If Xantrex repairs or replaces a product its warranty continues for the remaining portion of the original Warranty...

Страница 5: ...e product exchanged under warranty What does this warranty not cover This Limited Warranty does not cover normal wear and tear of the product or costs related to the removal installation or troublesho...

Страница 6: ...WILL XANTREX BE LIABLE FOR ANY SPECIAL DIRECT INDIRECT INCIDENTAL OR CONSEQUENTIAL DAMAGES LOSSES COSTS OR EXPENSES HOWEVER ARISING WHETHER IN CONTRACT OR TORT INCLUDING WITHOUT RESTRICTION ANY ECONO...

Страница 7: ...ur product user manual for limitations on uses of the product Specifically please note that this power supply is not intended for use in connection with life support systems and Xantrex makes no warra...

Страница 8: ...rgy for some time after power is removed CAUTION Operate the power supply in an environment free of flammable gases or fumes To ensure that the power supply s safety features are not compromised use t...

Страница 9: ...s and any changes in switch settings The user should also have experience with a computer based communications software package Refer to your power supply manual for installation configuration and ope...

Страница 10: ...About This Manual viii Operating Manual for GPIB for XPD Series Power Supply...

Страница 11: ...Mode Startup 21 Remote Mode Operation 22 Local Mode Operation 23 IEEE 488 Controller Connection 23 Internal PCB Jumper Selections 23 OVP Selection 23 TTL Shutdown 24 User Signals 25 Connector J21 Use...

Страница 12: ...Introduction 49 Voltage Mode Calibration 50 Voltage Calibration Setup 50 Voltage Program Calibration Procedure 50 Voltage Readback Calibration Procedure 50 Current Mode Calibration 52 Current Calibra...

Страница 13: ...upt generation with user designated fault conditions Both the voltage and current output are precisely programmed directly in volts and amps with 16 bit resolution Additionally the built in DVM and cu...

Страница 14: ...d service request over voltage protection and remote operation Foldback in CV or CC mode with reset Local Lockout capability Software calibration Programmable Functions Output voltage and current Soft...

Страница 15: ...6mV 0 7mA 18 6mV Program Accuracy1 Voltage Current OVP 1 Apply accuracy specifications according to the following voltage program accuracy example Set a model XPD 18 30 power supply to 10 volts The ex...

Страница 16: ...Features and Specifications Specifications 14 Operating Manual for GPIB for XPD Series Power Supply...

Страница 17: ...he GPIB interface printed circuit board PCB Initial Inspection On first receiving your unit perform a quick physical check Ensure each package contains a power supply with its GPIB interface board ins...

Страница 18: ...Front Panel with GPIB Interface Installed CAUTION Use proper static control techniques to avoid damage to static sensitive components on the printed circuit board Service Request LED SRQ Comes on at...

Страница 19: ...ponents on the printed circuit board S1 Switch 1 Remote Local Startup 2 Power On Service Reques Enable Disable 3 Not Used 4 8 Primary Address Selection A1 A5 Switch Position Reference markings 0 1 Err...

Страница 20: ...ne active low See page 27 2 3 default User TTL S D line active high J20 Remote OVP Control Selection closed default See page 23 open Note All other jumpers are not user selectable LED INDICATORS D1 Re...

Страница 21: ...h to select the state of the Power ON Service Request See Power On Service Request PON SRQ on page 21 3 Remote Local Operation Use the rear panel PON REM switch to select remote or local startup of th...

Страница 22: ...A5 to set the primary address for the power supply See Table 2 2 IEEE 488 Primary Address Selection Switch 0 OFF OPEN Switch 1 ON CLOSED Table 2 2 IEEE 488 Primary Address Selection Note Ensure you as...

Страница 23: ...face Subplate on page 17 Table 2 3 SRQ Switch Selection Remote Local Operation Remote Local Mode Startup Start the power supply either in local mode or in remote mode by setting the power ON remote PO...

Страница 24: ...3 Operation for a complete list of device dependent commands available with this interface For information about how to use GPIB commands and GPIB lines refer to the documentation for the particular...

Страница 25: ...GPIB interface to your IEEE 488 GPIB network The IEEE 488 connector uses mating connector J8 on the rear panel of the power supply Internal PCB Jumper Selections You can select how you use OVP over v...

Страница 26: ...rol Mode Selection TTL Shutdown You can use the Shutdown function to disable or enable the supply s output Disabling the supply using TTL shutdown allows you to make adjustments to the load or to the...

Страница 27: ...a standard 8 position telephone jack and data cable to connect to J21 To locate the connector refer to the GPIB interface subplate drawing in Figure 2 2 on page 21 See Figure 2 4 User Signals J21 Conn...

Страница 28: ...ed by VSET x J21 3 Isolation signal open collector asserted by OUT OFF J21 4 Fault signal open collector asserted when bit set in fault register J21 5 External Vcc 15V maximum supplied by connecting a...

Страница 29: ...packaged and shipped with the power supply interface card To install the ferrite block 1 Position the block no more than 5 cm 2 from the power supply end of the J21 user cable 2 Open the ferrite block...

Страница 30: ...tion and Configuration User Signals 28 Operating Manual for GPIB for XPD Series Power Supply Figure 2 6 J21 User Cable with Ferrite Block J21 User Cable Ferrite Block To User Custom Interface To J21 C...

Страница 31: ...d devices could include programmable AC or DC power supplies oscilloscopes signal generators digital voltmeters universal counters readouts relays and printers Use the GPIB interface to relay GPIB ins...

Страница 32: ...cceptor Handshake Device must properly receive remote multiline messages T6 Talker Device must be able to transmit L4 Listener Device must receive commands and data Interface Functions DC1 Device Clea...

Страница 33: ...t be configured remotely to respond to a parallel poll with either a 1 or 0 on one of the DIO lines if the unit is requesting service Example Service Request Service request is a uniline message asser...

Страница 34: ...lt register is set by a fault condition in the supply See also Accumulated Status Status and Fault Registers on page 46 FAULT query to reset 1 2 Not used 2 4 Not used 3 8 Not used 4 16 Ready Set when...

Страница 35: ...arameter or COMMAND parameter parameter You can enter commands in upper or lower case lettering Example MASK FOLD mask fold Do not further abbreviate command names or parameters Example MASK FOLD MK F...

Страница 36: ...ault unit is amps float float A float mA time The time in seconds or milliseconds If no unit is given the default unit is seconds float float s float ms voltage Vlo Vhi The voltage in volts or millivo...

Страница 37: ...e Feed Format COMMAND parameter COMMAND parameter parameter LF Most computer controllers automatically send LF with output statements Order You may send commands in any order keeping in mind that only...

Страница 38: ...a new output voltage or current is specified FOLD Sets foldback mode for the supply HOLD Enables or disables voltage current setting hold mode for the supply IMAX Sets an upper soft limit on the progr...

Страница 39: ...ks for the present hold mode setting ID Asks for the power supply s model name and master EPROM version IMAX Asks for the supply s soft current limit setting IOUT Measures the supply s actual current...

Страница 40: ...pt for voltage programming VHI Sets the voltage output to the high calibration point VLO Sets the voltage output to the low calibration point VRDAT Calculates the slope and intercept for voltage readb...

Страница 41: ...s as listed in the status register AUXA 1 ON 0 OFF Controls the AUXA output signal level at rear panel connector J21 7 Active low Initial value AUXA 0 AUXA Asks for the present set value of the AUXA o...

Страница 42: ...rs the ERR bit in the accumulated status register See Error Codes on page 47 Response ERR error number Example ERR 0 if no error FAULT Asks for the state of the fault register A bit is set in the faul...

Страница 43: ...to the output terminal This value is at the high end of the power supply s current range and is read by an external device connected as part of the calibration procedure Refer to this value as IHI and...

Страница 44: ...amps default or in milliamps This programmed current is the actual output in CC mode or the current limit in CV mode Range 0 to model maximum output current IMAX Initial value 0 amps ISET Asks for the...

Страница 45: ...supply to respond to a variety of fault conditions with a request for service to the IEEE 488 bus controller With SRQ ON the SRQ line will be asserted true whenever the FAU bit in the supply s serial...

Страница 46: ...unmasked Response UNMASK fault mask where fault mask is the decimal equivalent of the total bit weights for the operating conditions as listed in the status and fault registers See Accumulated Status...

Страница 47: ...f the programmed voltage range Refer to the output value as VRHI and record it to use as input with the VRDAT command Set CMODE ON before using this command See also the calibration procedures in Sect...

Страница 48: ...he error ERR bit is reset in the accumulated status status and serial poll registers with an error query ERR 3 The accumulated status register is cleared with an accumulated status query ASTS 4 A faul...

Страница 49: ...ctly placed word number separator or terminator Example OFF SRQ VOUT 6 MASK ERR 5 Number Out of Range Specified a value for the command which was outside of the allowed range 6 Attempt to Exceed Soft...

Страница 50: ...or successfully recovered from an illegal operating code The event is transparent to the GPIB communications bus and the GPIB interface continues to function normally The red COP LED at D4 indicates t...

Страница 51: ...ds Current sensing shunt resistor rated for 150 of maximum output current 0 25 accuracy or better Connection wires rated for the unit s maximum output current and voltage A GPIB equipped computer to s...

Страница 52: ...nd record the output voltage as shown on the external voltmeter 5 Send the command VDATA vlo vhi where vlo and vhi are the values read from the voltmeter when the VLO and VHI commands were sent When t...

Страница 53: ...vhi where vlo and vhi are the values read from the voltmeter after the VRLO and VRHI commands were sent The processor calculates the offset value required to calibrate the power supply When the power...

Страница 54: ...d IHI VHI to the supply Measure and record the output voltage shown on the external voltmeter 5 Calculate ILO and IHI from the voltages read from the external voltmeter and the shunt resistance I V R...

Страница 55: ...age shown on the external voltmeter Send IRHI again 5 Calculate IRLO and IRHI from the voltages taken from the external voltmeter and the shunt resistance I V R 6 Send the command IRDAT ilo ihi to the...

Страница 56: ...the PCB of jumper J2 3 Activate calibration mode by sending command CMODE ON or CMODE 1 to the power supply 4 Send the command OVCAL to the power supply The ADR LED will light during OVP calibration...

Страница 57: ......

Страница 58: ...echnology Inc 8999 Nelson Way Burnaby British Columbia Canada V5A 4B5 604 422 8595 Tel 604 421 3056 Fax 800 667 8422 Toll Free North America prg info xantrex com www xantrex com TM GPPD 01XN PRINTED I...

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