Xantrex GPIB-XPD Operating Manual
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Xantrex GPIB-XPD Operating Manual

Internal gpib interface for xpd series programmable dc power supply
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GPIB-XPD
Operating Manual
Internal GPIB Interface
for XPD Series
Programmable DC
Power Supply

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Summary of Contents for Xantrex GPIB-XPD

  • Page 1 GPIB-XPD Operating Manual Internal GPIB Interface for XPD Series Programmable DC Power Supply...
  • Page 3 Operating Manual for Internal GPIB Interface for XPD 500 Watt Series Programmable DC Power Supply...
  • Page 4 What does this warranty cover and how long does it last? Warranty This Limited Warranty is provided by Xantrex Technology, Inc. (“Xantrex”) and covers defects in workmanship and materials in your GPIB Interface Card. This warranty lasts for a Warranty Period of 5 years from the date of purchase at point of sale to you, the original end user customer.
  • Page 5 Direct returns may be performed according to the Xantrex Return Material Authorization Policy described in your product manual. For some products, Xantrex maintains a network of regional Authorized Service Centers. Call Xantrex or check our website to see if your product can be repaired at one of these facilities. In any warranty claim, dated proof of purchase must accompany the product and the product must not have been disassembled or modified without prior written authorization by Xantrex.
  • Page 6 Disclaimer Product THIS LIMITED WARRANTY IS THE SOLE AND EXCLUSIVE WARRANTY PROVIDED BY XANTREX IN CONNECTION WITH YOUR XANTREX PRODUCT AND IS, WHERE PERMITTED BY LAW, IN LIEU OF ALL OTHER WARRANTIES, CONDITIONS, GUARANTEES, REPRESENTATIONS, OBLIGATIONS AND LIABILITIES, EXPRESS OR IMPLIED, STATUTORY OR OTHERWISE IN CONNECTION WITH THE PRODUCT, HOWEVER ARISING (WHETHER BY CONTRACT, TORT, NEGLIGENCE, PRINCIPLES OF MANUFACTURER’S LIABILITY, OPERATION OF LAW, CONDUCT, STATEMENT OR OTHERWISE), INCLUDING WITHOUT RESTRICTION ANY...
  • Page 7 Please record the following information when you first open your Power Supply package: About Your Power Model Number Supply Serial Number Purchased From Purchase Date Release Release 1.2 (2002-06) © Copyright Printed in Canada Release 1.2 ______________________________________________ ______________________________________________ ______________________________________________ ______________________________________________ 2002 Xantrex Technology Inc. All rights reserved.
  • Page 8 Power Supply WARNING—High Energy and High Voltage Safety Exercise caution when using and calibrating a power supply. High energy levels can be stored at the output voltage terminals on a power supply in normal operation. In addition, potentially lethal voltages exist in the power circuit and on the output and sense connectors of a power supply with a rated output greater than 40 V.

  • Page 9: About This Manual

    About This Manual This technical manual is for the internal GPIB interface, a microprocessor-controlled option card for XPD Series DC output power supplies. This manual provides you with descriptions and specifications, user options, and configuration instructions, in addition to a command set which enables you to manage the power supply from an external source.
  • Page 10 About This Manual viii Operating Manual for GPIB for XPD Series Power Supply...

  • Page 11: Table Of Contents

    Contents About This Manual ........... vii Section 1.
  • Page 12 Contents Error Codes ............47 Troubleshooting .

  • Page 13: Description

    Section 1. Features and Specifications Description The internal GPIB interface card allows you to operate your power supply from a computer controller via the IEEE-488 communications bus. See Figure 1.1, “Sample Configuration using GPIB Interface”. The GPIB interface allows complete remote programming of your power supply, including status reporting, settings query, and interrupt generation with user-designated fault conditions.

  • Page 14: Features And Functions

    Features and Functions Features and Functions • Features 16-bit programming and readback of voltage and current • Programmable soft limits for voltage and current • Programmable over voltage protection with reset • Easy-to-use, self-documenting command set • Isolated user-programmable signals such as fault, polarity, isolation, and auxiliary signals •...

  • Page 15: Specifications

    Specifications The specifications in this section are warranted at 25°C ±5°C unless otherwise specified. All specifications are subject to change without notice. Table 1.1 Specifications for XPD 500 W Series Supply with GPIB Interface Installed Models 7.5-67 Program Resolution Voltage 1.2mV Current 5.2mA...
  • Page 16 Features and Specifications Specifications Operating Manual for GPIB for XPD Series Power Supply...

  • Page 17: Introduction

    Section 2. Installation and Configuration Introduction To use this product, you must have the following equipment: • a compatible model of DC output power supply • IEEE-488 connector and cable • computer with an IEEE-488 interface • Computer-based communications software package We usually install the GPIB interface in a power supply at the factory.
  • Page 18 Initial Inspection CAUTION Use proper static control techniques to avoid damage to static-sensitive components on the printed circuit board. Comes on at power up if the PON SRQ switch is set to on. You can enable the SRQ LED during normal operation with Figure 2.1 Power Supply Front Panel with GPIB Interface Installed Service Request LED (SRQ) the SRQ command.
  • Page 19 Address LED (ADR) Indicates that the unit is being addressed by the master controller. Error LED (ERR) Indicates that a programming error has occurred. Clear with error query command. IEEE 488 Connector Figure 2.2 GPIB Interface Subplate CAUTION Use proper static control techniques to avoid damage to static-sensitive components on the printed circuit board Release 1.2 J21 User Signal...
  • Page 20 Initial Inspection Note: All other jumpers are not user-selectable. Figure 2.3 GPIB Interface PCB JUMPER SELECTION Local OVP control selection User TTL shutdown (S/D) selection Remote OVP Control Selection LED INDICATORS Red Diagnostic LED Red Diagnostic LED Green Diagnostic LED EPROMS Slave EPROM Master EPROM...

  • Page 21: Basic Setup Procedure

    Basic Setup Procedure This procedure can be used as a quick reference for those familiar with the configuration requirements for the GPIB interface as installed in the DC power supply. For those who want more information, each step refers to more detailed procedures located in subsequent sections.

  • Page 22: Ieee-488 Primary Address Selection

    IEEE-488 Primary Address Selection IEEE-488 Primary Address Selection 1. Assign a primary address to each power supply: Choose a number between 0 and 30 which is unique to your IEEE-488 bus, that is, different from other device addresses on the same bus. 2.

  • Page 23: Power On Service Request (Pon Srq)

    Power On Service Request (PON SRQ) The Power ON Service Request (SRQ) switch is located on the GPIB subplate rear panel S1 switch. Enabling the SRQ switch causes the power supply to send a service request to the computer controller when the power supply is turned on or when it re-initializes after a momentary power interrupt.

  • Page 24: Remote Mode Operation

    Remote/Local Operation If the rear panel PON REM switch is set to 1, the power supply will power up in local mode. Power supply control is at the front panel. During an operating session, you can toggle between local mode and remote mode by sending commands as described in “Remote Mode Operation”...

  • Page 25: Local Mode Operation

    To return to remote mode, ensure that the REN line is asserted and then send any valid GPIB or device-dependent command. Local Mode In local mode operation, the voltage and current output levels and the OVP trip level are set with controls located on the front panel. Refer to the operating manual Operation for a description of the functions available at the front panel.

  • Page 26: Ttl Shutdown

    Internal PCB Jumper Selections the front panel LOCAL switch, control of the OVP trip level changes from software control to the front panel OVP potentiometer. The default OVP trip level is set as 110% of the power supply's rated output voltage. See Table 2.5, on page 22 for a complete list of remote power ON default settings.

  • Page 27: User Signals

    Table 2.7 Switch Settings for TTL Shutdown Circuit Logic PCB Jumper J3 Position Pin 2 to Pin 3 (default) Pin 1 to Pin 2 User Signals Connector Auxiliary connector J21, located on the GPIB interface rear panel, provides several signals to increase your operating control of the supply. These signals are J21 User dependent on the operator's design and uses.
  • Page 28 User Signals J21-1 External TTL shutdown input signal (See “TTL Shutdown”) J21-2 Polarity signal, open collector (asserted 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 and operating an external source) J21-6 External ground and shutdown return...

  • Page 29: J21 Cable Connection

    Figure 2.5 J21 User Signal Connector Circuit Block Diagram J21 Cable Use a standard 8-position telephone jack and data cable to connect to J21. Add a Connection ferrite block to reduce radiated emission. The one inch square ferrite block with built-in housing clip is packaged and shipped with the power supply interface card.
  • Page 30 Installation and Configuration User Signals J21 User Cable Ferrite Block To J21 Connector To User Custom Interface Figure 2.6 J21 User Cable with Ferrite Block Operating Manual for GPIB for XPD Series Power Supply...

  • Page 31: Introduction

    Section 3. Operation Introduction This section covers GPIB interface programming, starting with IEEE-488 functions, continuing with an extensive set of device-dependent commands, and, finally, providing error codes, and status and fault register information. GPIB Operation A GPIB interface controller card enables you to control an IEEE-488 bus system via computer, identifying which of its interconnected devices are to send and receive data.

  • Page 32: Multiline Control Functions

    GPIB Operation Table 3.1 IEEE-488.1 Interface Functions Implemented Mnemonic Capability Source Handshake Multiline Acceptor Handshake Control Functions Talker Listener Device Clear Interface Functions Device Trigger Open Collector Drivers Describes the type of electrical drivers in a device. Parallel Poll Remote/Local Service Request Serial Poll Multiline...

  • Page 33: Device Trigger

    Device Device Trigger will implement the most recently programmed values whether the unit is in local or remote control. If the power supply is in local mode, the new values Trigger will be implemented when it is switched from local to remote control. Device Trigger is typically used to synchronize the operation of a number of addressed devices.

  • Page 34: Serial Poll

    GPIB Operation Serial Poll In a serial poll, the controller polls each device. Example: ibrsp The power supply responds with a 8-bit status byte defined as follows: Table 3.2 Serial Poll Status Register Position 0 (LSB) 7 (MSB) Return serial poll byte. Decimal Description Weight...

  • Page 35: Command Syntax

    Command Syntax Manual The manual uses these conventions when displaying command information. These characters are not part of the command but are used to denote parameters used with Conventions the command. < > (angle brackets) / (slash) COMPUTER ENTRY Command The device-dependent language for the GPIB Interface consists of commands and Format and parameters.
  • Page 36 Command Syntax • Use commas between parameters in those commands with more than one parameter, and between mnemonic parameters as in the MASK and UNMASK commands. Only one comma is allowed and it may be preceded or followed by any number of spaces. Example: Table 3.3 Command Parameters Parameter...

  • Page 37: Command Strings

    Command If you send more than one command line, separate the commands with a semicolon. The semicolon may be preceded or followed by spaces. Strings Example: ISET 2.0A; VSET 5V ISET 2.0A; VSET 5V Command Terminators indicate the end of a command string and tell the power supply to execute the command.

  • Page 38: Command Summary

    Operation Command Summary Command Summary Use these commands to control the operation of the supply. They are listed here in order of function such as PROGRAMMING, QUERY, CALIBRATION, and STATUS commands. See “Command Reference” on page 39 for more detailed information about each command and its use.
  • Page 39 Table 3.6 Query Commands Command AUXA? AUXB? CMODE? DLY? ERR? FOLD? HOLD? IMAX? IOUT? ISET? OUT? OVSET? ROM? SRQ? VMAX? VOUT? VSET? Release 1.2 Description Asks for the state of the set value for the AUXA command Asks for the state of the set value for the AUXB command Asks for the power supply’s calibration mode status.
  • Page 40 Command Summary Table 3.7 Calibration Commands Command CMODE IDATA IRDAT IRHI IRLO OVCAL VDATA VRDAT VRHI VRLO Table 3.8 Status Commands Command ASTS? FAULT? MASK STS? UNMASK UNMASK? Description Places the supply into calibration mode. Calculates the slope and intercept for current programming. Sets the current output to the high calibration point.

  • Page 41: Command Reference

    Command Reference Table 3.9 Command Reference Command Description ASTS? Asks for the supply’s accumulated status register. The accumulated status register stores any bit that was entered in the status register since the accumulated status query command (ASTS?) was last used, regardless of whether the condition still exists.
  • Page 42 Command Reference Command Description DLY <seconds> Sets a programmable time delay employed by the supply before reporting fault conditions. The power supply uses the time delay after receiving a new output voltage or current setting via VSET or ISET, or after receiving RST, TRG, or OUT ON commands.
  • Page 43 Command Description FOLD? Asks for the supply’s present foldback setting. Response: FOLD <mode> where mode is: HOLD <1/ON>,<0/OFF> Enables or disables voltage/current setting hold mode for the supply. When HOLD ON is specified, hold mode is enabled so that all voltage and current settings which would normally be implemented by the supply are held until a TRG (trigger) command is received.
  • Page 44 Command Reference Command Description IRDAT <Ilo>,<Ihi> Calculates and records the slope and offset for readback voltage using IRLO and IRHI data. Set CMODE ON before using this command. See also the calibration procedures in Section 4. <Ilo> and <Ihi> are in <current> format. IRHI The power supply outputs a current value to an external device connected as part of the calibration procedure and records a current readback value...
  • Page 45 Command Description OVCAL Causes the master controller to perform automatic calibration of the supply’s over voltage protection circuitry. Set CMODE ON before using this command. Ensure jumper J2 on the GPIB Interface PCB is connected for remote operation. OVSET <voltage> Sets the supply’s over voltage protection trip point in volts (default) or in millivolts.
  • Page 46 Command Reference Command Description Implements programmed voltage and current settings which had been in hold mode. The supply operates with previous values until the TRG (trigger) command is sent. UNMASK <mnemonics> Enables you to select the supply operating conditions that you are most interested in monitoring for fault occurrence.
  • Page 47 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.

  • Page 48: Accumulated Status, Status, And Fault Registers

    Accumulated Status, Status, and Fault Registers Accumulated Status, Status, and Fault Registers The GPIB option card uses three separate registers which are always active. They are the accumulated status, status, and fault registers. You can use the status commands shown in Table 3.8, “Status Commands” to activate the registers. The bit register has twelve conditions, each assigned a bit weight.

  • Page 49: Error Codes

    Error Codes If the ERR flag in the accumulated status or fault registers has been activated, an ERR? query will return an error number which corresponds to an event described in the following table. The ERR? query will also clear the ERR bit in the register. Table 3.11 Error Codes ERROR # ERROR IDENTIFICATION Release 1.2...

  • Page 50: Troubleshooting

    Troubleshooting Troubleshooting WARNING Exercise caution when using and servicing power supplies. High energy levels can be stored at the output voltage terminals on all power supplies in normal operation. In addition, potentially lethal voltages exist in the power circuit and the output connector of power supplies which are rated at 40V and over.

  • Page 51: Introduction

    Section 4. Calibration Introduction WARNING Exercise caution when using and servicing power supplies. High energy levels can be stored at the output voltage terminals on all power supplies in normal operation. In addition, potentially lethal voltages exist in the power circuit and the output connector of power supplies which are rated at 40V and over.

  • Page 52: Voltage Mode Calibration

    Voltage Mode Calibration Voltage Mode Calibration Voltage 1. Disconnect the load from the power supply which is to be calibrated. Calibration 2. Connect a voltmeter across the power supply’s output terminals. Setup Figure 4.1 Voltage Calibration Setup Voltage 1. Set the power supply for calibration as in Figure 4.1. Program 2.
  • Page 53 3. Send command VRLO; IRLO to the power supply. Wait for the supply to settle. Measure and record the output shown on the external voltmeter. Send VRLO again. 4. Send VRHI; IRHI to the supply. Wait for the supply to settle. Measure and record the output voltage shown on the external voltmeter.

  • Page 54: Current Mode Calibration

    Current Mode Calibration Current Mode Calibration Current 1. Disconnect the load from the power supply to be calibrated. Calibration 2. Connect a shunt across the supply's output terminals. Setup 3. Connect a voltmeter across the shunt. Figure 4.2 Current Calibration Setup Current 1.

  • Page 55: Current Readback Calibration Procedure

    Current 1. Connect the current shunt and voltmeter to the power supply as shown in Readback Figure 4.2. Calibration 2. Activate calibration mode by sending command CMODE ON or CMODE 1 to Procedure the power supply. 3. Send command IRLO; VRLO to the power supply. Wait for the supply to settle. Measure and record the output voltage shown on the external voltmeter.

  • Page 56: Over Voltage Protection (Ovp) Calibration

    Over Voltage Protection (OVP) Calibration Over Voltage Protection (OVP) Calibration We recommend that you perform OVP calibration every six months. Connecting a digital voltmeter as in “Voltage Calibration Setup” is optional. 1. Disconnect all loads from the power supply. 2. Ensure that jumper J2 on the interface PCB is CLOSED to enable remote OVP calibration (Jumper J2 is closed at the factory).
  • Page 58 Xantrex Technology 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 IN CANADA...

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