GPIB-PRL User Manual - National Instruments
Contents
1. GND TW PAIR W DAV GND TW PAIR W NRFD GND TW PAIR W NDAC GND TW PAIR W IFC GND TW PAIR W SRQ GND TW PAIR W ATN SIGNAL GROUND Figure 1 5 The GPIB Connector and Signal Designations GPIB PRL User Manual 1 8 National Instruments Corp Chapter 2 Installation and Operation As mentioned in Chapter the GPIB PRL can transfer data either from the GPIB port to the parallel port or from the parallel port to the GPIB port The parallel interface supports only unidirectional data transfers so the GPIB PRL must be configured to source data onto the parallel port or to receive data from the parallel port If the parallel port is going to be the source of the data and a GPIB device will be the end recipient of the data as with a GPIB plotter connected via a GPIB PRL to the Centronics port on an IBM PC you will be operating in P Parallel mode Data Direction parallel cable CGF IB cable Figure 2 1 Example of P Mode System Setup If the GPIB port will be the source of the data and a parallel device will be receiving the data as with a Centronics printer interfaced to the IEEE 488 via a GPIB PRL you will be operating in G GPIB mode Data Direction parallel cable Figure 2 2 Example of G Mode System Setup National Instruments Corp 2 1 GPIB PRL User Manual Installation and Operations Chapter 2 Installation There are five basic steps to2. 5678 Branch Offices Australia Austria Belgium Denmark Finland France Germany Italy Japan Netherlands Norway Spain Sweden Switzerland U K Phone Number 03 879 9422 0662 435986 02 757 00 20 45 76 26 00 90 527 2321 1 48 65 33 00 089 7 14 50 93 02 48301892 03 3788 1921 01720 45761 03 846866 91 640 0085 08 730 49 70 056 27 00 20 0635 523545 or 0800 289877 in U K only Fax Number 03 879 9179 0662 437010 19 02 757 03 11 45 76 71 11 90 502 2930 1 48 65 19 07 089 7 14 60 35 02 48301915 03 3788 1923 01720 42140 03 846860 91 640 0533 08 730 43 70 056 27 00 25 0635 523154 Technical Support Form Technical support is available at any time by fax Include the information from your configuration form Use additional pages if necessary Name Company Address Fax Phone Computer brand Model Operating system Processor Speed MHz RAM Display adapter MB Mouse yes no Other adapters installed Hard disk capacity Instruments used MB Brand National Instruments hardware product model Revision Configuration National Instruments software product Version Configuration continues The problem is List any error messages The following steps will reproduce the problem Hardware Configuration Form Record th
3. American National Standards Institute Celsius complementary metal oxide semiconductor electromagnetic interference Federal Communications Commission General Purpose Interface Bus hertz Institute of Electrical and Electronic Engineers inches kilobytes of memory light emitting diode meters megabytes of memory seconds volts alternating current volts direct current
4. PRL is designed to be used with a device which adheres to the Centronics interface standard it can also be used with other devices which use a unidirectional parallel 8 bit bus similar in nature to the Centronics specification Since the GPIB is also a parallel bus to avoid confusion the Centronics type interface port is referred to as the parallel port and the GPIB port is referred to as the GPIB or IEEE 488 throughout the manual What Your Kit Contains Your kit should contain the following components One of the following boxes e GPIB PRL 256K RAM 115 VAC 776177 02 e GPIB PRL 256K RAM 230 VAC 776177 32 GPIB PRL User Manual 320090 01 GPIB PRL User Manual 1 2 National Instruments Corp Chapter 1 Description of the GPIB PRL Optional Equipment Rack Mount Kit Single 1 unit 180480 01 Dual 2 units 180480 02 Parallel Centronics Shielded Cables 2 meters Standard 36 pin male champ to 36 pin male champ 180323 10 For IBM PC 25 pin D sub to 36 pin male champ 181073 20 Double Shielded GPIB Cables GPIB Type X2 Cable 1 m 763061 01 GPIB Type X2 Cable 2 m 763061 02 GPIB Type X2 Cable 4 m 763061 03 GPIB PRL Specifications The following tables specify the electrical environmental and physical characteristics of the GPIB PRL Table 1 1 Electrical Characteristics Characteristic Specification Power Supply Unit Wall mount type 115 VAC or 230 VAC 50 60 Hz input 9 VDC 1A max
5. be performed by properly trained and qualified medical personnel and all traditional medical safeguards equipment and procedures that are appropriate in the particular situation to prevent serious injury or death should always continue to be used when National Instruments products are being used National Instruments products are NOT intended to be a substitute for any form of established process procedure or equipment used to monitor or safeguard human health and safety in medical or clinical treatment FCC DOC Radio Frequency Interference Compliance This equipment generates and uses radio frequency energy and if not installed and used in strict accordance with the instructions in this manual may cause interference to radio and television reception This equipment has been tested and found to comply with the following two regulatory agencies Federal Communications Commission This device complies with Part 15 of the Federal Communications Commission FCC Rules for a Class A digital device Operation is subject to the following two conditions 1 This device may not cause harmful interference in commercial environments 2 This device must accept any interference received including interference that may cause undesired operation Canadian Department of Communications This device complies with the limits for radio noise emissions from digital apparatus set out in the Radio Interference Regulations of the Canadian Department o
6. contact us this manual contains comment and configuration forms for you to complete These forms are in the appendix Customer Communication at the end of this manual GPIB PRL User Manual x National Instruments Corp Chapter 1 Description of the GPIB PRL This chapter contains general information about the National Instruments GPIB PRL and lists components and accessories Environmental electrical and physical specifications are also provided Introduction The GPIB PRL shown in Figure 1 1 provides a method of connecting a device with a Centronics type interface port to the IEEE 488 GPIB bus The GPIB PRL allows transparent conversion of data between the two ports so that control codes or special commands are not required The GPIB PRL also increases the efficiency of the interface system by isolating the slower device from the faster port with a 256 KB character buffer This buffer is used to offload the host computer during printer and plotter applications IEEE 488 C gt PARALLEL ff bd e e e e POWER READY TALK LISTEN BUSY FULL Figure 1 1 The GPIB PRL National Instruments Corp l 1 GPIB PRL User Manual Description of the GPIB PRL Chapter 1 The GPIB PRL is capable of providing data conversion in either direction that is it can be used to interface GPIB plotters and printers to a computer with a Centronics type output port or to add a standard Centronics type printer to a GPIB network Although the GPIB
7. output Voltage 9 VDC regulated Current 640 mA typical 1 500 mA max National Instruments Corp 1 3 GPIB PRL User Manual Description of the GPIB PRL Chapter 1 Table 1 2 Environmental Characteristics Characteristic Specification Operating Temperature 10 to 40 C Storage Temperature 0 to 70 C Relative Humidity 10 to 95 noncondensing conditions Table 1 3 Physical Characteristics Characteristic Specification 144 8 mm by 213 4 mm The GPIB PRL Front Panel The front panel of the GPIB PRL is shown in the following figure The power switch and six light emitting diodes LEDs are mounted on the GPIB PRL front panel Whe GPIB PRL Co IEEE 488 lt PARALLEL J J J J POWER READY TALK LISTEN BUSY FULL Figure 1 2 The GPIB PRL Front Panel GPIB PRL User Manual 1 4 National Instruments Corp Chapter 1 Description of the GPIB PRL The LEDs show the current status of the GPIB PRL at all times Table 1 4 describes each LED Table 1 4 LED Descriptions POWER Indicates that power to the unit has been applied and the ON OFF switch is in the ON position READY Indicates that the power on self test has passed successfully and the unit is ready to operate TALK Indicates that the GPIB PRL is configured as a GPIB Talker LISTEN Indicates that the GPIB PRL is configured as a GPIB Listener BUSY Indicates the current status of the parallel bus signal BUSY FULL Indicates that the interna
8. over the GPIB to initialize the GPIB device The interface signal descriptions and timing relationships for the parallel port while in P Mode are shown in the following table National Instruments Corp 3 5 GPIB PRL User Manual Technical Information P Mode Parallel Interface Chapter 3 The STROBE pulse tells the GPIB PRL that the data on the bus is valid The GPIB PRL will read the data in on the rising edge of STROBE The STROBE signal should be asserted for at least 0 5 These signals represent the data byte being transferred Each signal is at a HIGH level when data is a logical 1 and a LOW level when data is a logical 0 DATAL is the lowest order bit and DATAS8 is the highest order bit This data should be stable on the bus at least 0 5 usec before STROBE is asserted and should remain on the bus at least 0 5 usec after STROBE is unasserted Indicates that the data has been received by the GPIB PRL and it is ready to accept more data ACKNLG will be asserted for a minimum of 10 usec A HIGH signal indicates that the GPIB PRL is busy and cannot accept more data BUSY will be high when a byte has been sent to the GPIB PRL but has not yet been Twisted pair ground return lines for signals on pins 1 11 Signal Return Signal Direction Description Pin Pin 1 19 STROBE IN usec 2 20 DATA1 IN 3 21 DATA2 IN 4 22 DATA3 IN 5 23 DATA4 IN 6 24 DATA5 IN 7 25 DATA6 IN 8 26 DATA7 IN 9 27 DATA8 IN 10 28
9. will be initialized In G mode the GPIB PRL may act only as a GPIB Listener The GPIB PRL should not be passed control If it is the GPIB circuitry in the GPIB PRL will accept control and immediately assert ATN This is an error condition which may lock up your system and therefore should be avoided Neither Trigger nor Go To Local has any effect on the GPIB PRL GPIB PRL User Manual 3 2 National Instruments Corp Chapter 3 Technical Information The interface signal descriptions and timing relationships for the G mode parallel port signals are shown in the following table G Mode Parallel Interface The STROBE pulse is used to signal that data on the bus is valid Pulse width will be greater than 0 5 These signals represent the data byte being transferred Each signal is at a HIGH level when data is a logical 1 and a LOW level when data is a logical 0 DATAL is the lowest order bit and DATAS is the highest order bit The data will be stable on the bus at least 0 5 usec before STROBE is asserted and will remain on the bus at least 0 5 usec after STROBE is unasserted Indicates that the data has been received by the parallel device This signal should be active at least Twisted pair ground return lines for signals on pins 1 10 Asserted when the GPIB PRL receives either a universal device clear DCL or its listen address and a selected device clear SDC This signal will be asserted for approxima
10. ACKNLG OUT 11 29 BUSY OUT accepted 19 30 GND GPIB PRL User Manual 3 6 National Instruments Corp Chapter 3 Technical Information Signal Return Signal Direction Description Pin Pin 31 INIT IN When this signal is asserted the GPIB PRL will be reset to its power up state and its internal buffer is cleared The DCL or SDL command will be sent to the GPIB device INIT should be asserted for a minimum of 50 usec 33 GND Same as for pins 19 30 STROBE 0 5 psec min 0 5 psec min 0 5 psec min ACKNLG f 0 5 psec min Figure 3 2 P Mode Parallel Interface Timing National Instruments Corp 3 7 GPIB PRL User Manual Appendix A Customer Communication For your convenience this appendix contains forms to help you gather the information necessary to help us solve technical problems you might have as well as a form you can use to comment on the product documentation Filling out a copy of the Technical Support Form before contacting National Instruments helps us help you better and faster National Instruments provides comprehensive technical assistance around the world In the U S and Canada applications engineers are available Monday through Friday from 8 00 a m to 6 00 p m central time In other countries contact the nearest branch office You may fax questions to us at any time Corporate Headquarters 800 433 3488 toll free U S and Canada Technical Support fax 512 794
11. GPIB PRL User Manual MicroGPIB IEEE 488 to Parallel Interface November 1993 Edition Part Number 320090 01 Copyright 1990 1993 National Instruments Corporation All Rights Reserved National Instruments Corporate Headquarters 6504 Bridge Point Parkway Austin TX 78730 5039 512 794 0100 800 IEEE 488 toll free U S and Canada Technical support fax 512 794 5678 Branch Offices Australia 03 879 9422 Austria 0662 435986 Belgium 02 757 00 20 Canada Ontario 519 622 9310 Canada Qu bec 514 694 8521 Denmark 45 76 26 00 Finland 90 527 2321 France 1 48 65 33 70 Germany 089 714 50 93 Italy 02 48301892 Japan 03 3788 1921 Netherlands 01720 45761 Norway 03 846866 Spain 91 640 0085 Sweden 08 730 49 70 Switzerland 056 27 00 20 U K 0635 523545 Limited Warranty The GPIB PRL is warranted against defects in materials and workmanship for a period of two years from the date of shipment as evidenced by receipts or other documentation National Instruments will at its option repair or replace equipment that proves to be defective during the warranty period This warranty includes parts and labor A Return Material Authorization RMA number must be obtained from the factory and clearly marked on the outside of the package before any equipment will be accepted for warranty work National Instruments will pay the shipping costs of returning to the owner parts which are covered by warranty National Instrumen
12. ON OFF OFF GPIB Primary address 12 OFF ON ON OFF GPIB Primary address 13 OFF ON ON OFF GPIB Primary address 14 F F F N ON OFF Ol ON ON li GPIB Primary address 15 N OFF OFF OFF OF GPIB Primary address 16 N I ON OFF ON ON OFF ON OFF ON ON ON ON ON OFF OFF OFF O ON ON ON ON i ON i z O ON i A ON i Sets listen only mode G mode or sends out possible Listener addresses P mode GPIB PRL User Manual 2 6 National Instruments Corp Chapter 2 Installation and Operation Step 4 Connect the Cables The cables should be connected in the following order to ensure proper connection 1 Connect the parallel cable to the GPIB PRL and close the bail lock clips Connect the other end of the cable to your parallel device Be sure to use only shielded parallel cable 2 Connect the GPIB cable to the GPIB PRL and tighten the thumb screws on the connector Connect the other end to your GPIB system Be sure to obey all IEEE 488 cabling restrictions and use shielded GPIB cable 3 Connect the power jack of the wall mount power supply to the power receptacle on the back panel of the GPIB PRL then plug the supply into an AC outlet of the correct voltage Note To disconnect the cables remove the GPIB cable before removing the parallel cable so that the bail lock clips can be unlocked Step 5 Power on the Unit Power on your GPIB PRL by using the front panel rocker switch The POWER LED should come on im
13. e parallel port GPIB PRL User Manual 2 8 National Instruments Corp Chapter 3 Technical Information The GPIB PRL is actually a powerful 8 bit microcomputer tailored for use as an IEEE 488 to parallel protocol converter The unit s operating system is contained in Read Only Memory ROM and can address up to 256 KB of dynamic RAM The GPIB PRL microprocessor contains an integrated Direct Memory Access DMA controller for high speed data transfers from the GPIB circuitry The processor also contains an integrated memory management unit a dynamic RAM controller a clock generator a programmable timer unit and an interrupt controller The parallel port on the GPIB PRL has been designed to source data onto the parallel bus or to receive data from the parallel port switch selectable All GPIB functionality is provided by an LSI GPIB controller chip which is programmed and maintained by the operating system Both the parallel port and GPIB port are interrupt driven and feature extremely fast response times to external data transfers For more information on how the individual modes of operation work refer to the following sections G Mode Operation When operating in G mode the GPIB PRL accepts data from the GPIB port using the onboard DMA controller The DMA controller transfers the data directly to the memory buffer without processor intervention This allows for very high speed GPIB transfer rates as high as 900 kbytes s This m
14. e settings and revisions of your hardware on the line to the right of each item Update this form each time you revise your hardware configuration and use this form as a reference for your current configuration National Instruments Products e GPIB PRL Revision e Switch Settings Other Products e Computer Make and Model e Microprocessor e Clock Frequency e Type of Monitor Card Installed e Application Programming Language BASIC C Pascal and so on Documentation Comment Form National Instruments encourages you to comment on the documentation supplied with our products This information helps us provide quality products to meet your needs Title GPIB PRL User Manual Edition Date November 1993 Part Number 320090 01 Please comment on the completeness clarity and organization of the manual continues If you find errors in the manual please record the page numbers and describe the errors Thank you for your help Name Title Company Address Phone Mail to Technical Publications National Instruments Corporation 6504 Bridge Point Parkway MS 53 02 Austin TX 78730 5039 Fax to Technical Publications National Instruments Corporation MS 53 02 512 794 5678 Glossary ANSI CMOS EMI FCC GPIB IEEE in LED MB VAC VDC degrees percent amperes alternating current
15. eans that the GPIB system performance will not be degraded by interfacing a slow printer or plotter to the interface The buffered data is then dumped to the device on the parallel interface at its own rate These two asynchronous events take place concurrently and without user interaction All operations are completely transparent to the user If very large amounts of data are sent to the GPIB PRL greater than the amount of RAM in the system and the parallel device is a very slow data acceptor the GPIB PRL internal data buffer might become full In the unlikely event that this does occur the FULL indicator on the front panel will illuminate and the GPIB transfer rate will slow to approximately the same rate as the parallel device accepting the data Since the maximum data transfer rate on the GPIB is only as fast as the slowest listener the National Instruments Corp 3 1 GPIB PRL User Manual Technical Information Chapter 3 GPIB system performance may become unacceptable if other GPIB devices are required to transfer data on the bus To alleviate this problem the GPIB PRL has been designed with a special SRQ ON EMPTY feature which can be enabled by setting the internal configuration switches If maximum GPIB performance is required at all times this feature can be enabled and the GPIB PRL will request service from the GPIB Controller when its buffer is empty indicating it is ready for more data The Controller can then determine
16. ees 2 1 Installation ii e stock ecb es Ses ca cedars cn as deiees avsbeneebetacp seen den taces 2 2 Step l Inspectii sins Rea 2 2 Step 2 Verify the Voltage Requirement 2 2 Step 3 Configure the Operating Parameters 2 3 Set Configuration Switches 0 eee 2 4 Default Setting Sesoni seers tees 2 4 Step 4 Connect the Cables 0 0 eee cece ceeeeeeeee 2 7 Step 5 Power on the Unit eects ceeeeeeee 2 7 Operatlonics eere Eei e wes sign teens dstcon E E Sete E ERIN 2 7 Chapter 3 Technical Information 0 00 00 ceeceecseeceessteseeeseeseeeeeesneeneenneenes 3 1 G Mode Operation ncira isen iioi Eis ie a E E E EE 3 1 G Mode Parallel Interface nrnirene iie a 3 3 P Mode Operations cscs acs cas cs fbcnbek rne EEE E sens E EE 3 4 P Mode Parallel Interface eee eeeeeeeesseceeeeceseeeeeceeeeceeeeneeeee 3 6 National Instruments Corp vil GPIB PRL User Manual Contents Appendix Customer Communication cece eesseesesseeseenees A 1 Glossary ennaa e E E a AA RARA G 1 Figures Figure I 1 The GPIB PRI ne nae a E EE E E EE 1 1 Figure 1 2 The GPIB PRL Front Panel eseeseeeseeeeeereeeerrereresrserrreen 1 4 Figure 1 3 The GPIB PRL Rear Panel cee ceseeeeeeteeeeeeeeees 1 6 Figure 1 4 The Parallel Connector and Signal Designations 1 7 Figure 1 5 The GPIB Connector and Signal Designations 1 8 Figure 2 1 Example of P Mode System Setup ee eeeeeereeeee 2 1 Figure 2 2 Examp
17. es the procedures for configuring and operating the GPIB PRL Chapter 3 Technical Information contains a more detailed description of the operation of the GPIB PRL The timing characteristics of the parallel port are provided in this section The appendix Customer Communication contains forms you can use to request help from National Instruments or to comment on our products and manuals The Glossary contains an alphabetical list and a description of terms used in this manual including abbreviations acronyms metric prefixes mnemonics and symbols National Instruments Corp ix GPIB PRL User Manual About This Manual Conventions Used in This Manual The following conventions are used in this manual italic Italic text denotes emphasis a cross reference or an introduction to a key concept bold italic Bold italic text denotes a note caution or warning Abbreviations acronyms metric prefixes mnemonics symbols and terms are listed in the Glossary Related Documentation The following document contains information that you may find helpful as you read this manual e ANSI TEBE Standard 488 1 1987 IEEE Standard Digital Interface for Programmable Instrumentation Customer Communication National Instruments wants to receive your comments on our products and manuals We are interested in the applications you develop with our products and we want to help if you have problems with them To make it easy for you to
18. f Communications DOC Le pr sent appareil num rique n miet pas de bruits radio lectriques d passant les limites applicables aux appareils num riques de classe A prescrites dans le r glement sur le brouillage radio lectrique dict par le minist re des communications du Canada Instructions to Users These regulations are designed to provide reasonable protection against harmful interference from the equipment to radio reception in commercial areas Operation of this equipment in a residential area is likely to cause harmful interference in which case the user will be required to correct the interference at his own expense There is no guarantee that interference will not occur in a particular installation However the chances of interference are much less if the equipment is installed and used according to this instruction manual If the equipment does cause interference to radio or television reception which can be determined by turning the equipment on and off one or more of the following suggestions may reduce or eliminate the problem e Operate the equipment and the receiver on different branches of your AC electrical system e Move the equipment away from the receiver with which it is interfering e Reorient or relocate the receiver s antenna e Be sure that the equipment is plugged into a grounded outlet and that the grounding has not been defeated with a cheater plug Notice to user Changes or modification
19. installing the GPIB PRL 1 Inspect the GPIB PRL for damage that may have been caused in shipment 2 Verify the voltage requirement 3 Configure the operating parameters 4 Connect the cables 5 Power on the unit These steps are described in more detail in the following sections Step 1 Inspection Before you install the GPIB PRL inspect the shipping container and its contents for damage If damage appears to have been caused in shipment file a claim with the carrier Retain the packing material for possible inspection and or for reshipment If the equipment appears to be damaged do not attempt to operate it Contact National Instruments for instructions Step 2 Verify the Voltage Requirement The GPIB PRL is shipped from the factory with either a 115 V or 230 V wall mount supply Verify that the voltage on the supply matches the voltage that is supplied in your area Caution Operating the unit at any voltage other than the one specified could damage the unit GPIB PRL User Manual 2 2 National Instruments Corp Chapter 2 Installation and Operation Step 3 Configure the Operating Parameters The GPIB PRL is shipped from the factory configured to operate in G mode and set to the GPIB primary address of 5 If you wish to use the GPIB PRL in P mode or wish to change the GPIB primary address it is necessary to open the unit and set the configuration switches To change the configuration switches follow these step
20. l data buffer of the GPIB PRL has become full This is not an error condition but is merely a signal that bus performance may be reduced to the speed of the slower interface National Instruments Corp 1 5 GPIB PRL User Manual Description of the GPIB PRL Chapter 1 The GPIB PRL Rear Panel The rear panel of the GPIB PRL is shown in the following figure The power cable parallel cable and GPIB cable are shown connected to the rear panel of the GPIB PRL Figure 1 3 The GPIB PRL Rear Panel GPIB PRL User Manual 1 6 National Instruments Corp Chapter 1 Description of the GPIB PRL The Parallel Connector The parallel connector is a standard 36 pin shielded AMP Champ female connector with bail lock clips The parallel connector will accept standard 36 pin Centronics style male connectors A diagram of the parallel connector and the signals supported is shown below a suffix indicates that the signal is active low GND GND GND GND GND GND GND GND GND GND GND GND Figure 1 4 The Parallel Connector and Signal Designations National Instruments Corp 1 7 GPIB PRL User Manual Description of the GPIB PRL Chapter 1 The GPIB Connector The GPIB connector is a standard 24 pin shielded AMP Champ female connector with metric screwlock hardware A diagram of the GPIB connector and the signals supported is shown below a suffix indicates that the signal is active low DIO5 DIO6 DIO7 DIO8 REN
21. le of G Mode System Setup eee eeeeeeeeeee 2 1 Figure 2 3 Factory Default Settings 00 eeeeeceeeeeeeeeceeeeeeaees 2 4 Figure 3 1 G Mode Parallel Interface Timing 00 0 ee eeeeeeeeee 3 4 Figure 3 2 P Mode Parallel Interface Timing 3 7 Tables Table 1 1 Electrical Characteristics 200 0 ceeeessseenceeeeceeeceeeeceeeeneeeeees 1 3 Table 1 2 Environmental Characteristics 00 0 0 eeceeeeeceeeeeeeeeseeeeeeees 1 4 Table 1 3 Physical Characteristics 0 i ceceececessceceseeeeceeeeeeseseeeneenee 1 4 Table 1 4 LED Descriptions eee cee eens ceeceseeeeeeeeeeeseneeeneeaee 1 5 Table 2 1 Configuration Parameters for Switch 1 oo eee 2 4 Table 2 2 Configuration Parameters for Switches 2 and 3 2 5 Table 2 3 Configuration Parameters for Switches 4 through 8 2 6 GPIB PRL User Manual vill National Instruments Corp About This Manual Introduction to the GPIB PRL The GPIB PRL is one of National Instruments family of MicroGPIB products These products are high performance low cost IEEE 488 support items packaged in small all metal cases capable of being rack mounted Organization of This Manual This manual is organized as follows Chapter 1 Description of the GPIB PRL contains general information about the National Instruments GPIB PRL and lists components and accessories Environmental electrical and physical specifications are also provided Chapter 2 Installation and Operation describ
22. ly this indicates a GPIB primary address of 5 Tables 2 1 2 2 and 2 3 show the possible configurations of the eight switches and what the configurations indicate Default settings are in shaded TOWS Table 2 1 Configuration Switch Settings for Switch 1 COE Configures the GPIB PRL to operate in G mode o o Configures the GPIB PRL to operate in P mode GPIB PRL User Manual 2 4 National Instruments Corp Chapter 2 Installation and Operation Table 2 2 Configuration Switch Settings for Switches 2 and 3 Switches Indication G Mode 2 3 OFF OFF No SRQ on empty The GPIB PRL sends out listener address on switches 4 through 8 If switches 4 8 are all ON all possible listener addresses will be sent OFF ON SRQ on empty GPIB PRL considers switches 4 through 8 to be its talk address Table 2 3 Configuration Switch Settings for Switches 4 through 8 Switches Indication 4 5 6 7 8 OFF OFF OFF OFF OFF GPIB Primary address 0 OFF OFF OFF OFF ON GPIB Primary address 1 OFF OFF OFF ON OFF GPIB Primary address 2 OFF OFF OFF ON ON GPIB Primary address 3 OFF OFF ON OFF OFF GPIB Primary address 4 OFF ON OFF ON OFF GPIB Primary address 10 continues National Instruments Corp 2 5 GPIB PRL User Manual Installation and Operations Chapter 2 Table 2 3 Configuration Switch Settings for Switches 4 through 8 continued Switches Indication 4 5 6 7 8 OFF ON OFF O ON GPIB Primary address 11 OFF ON
23. mediately and the READY indicator should come on after the GPIB PRL has passed its power on self test indicating the unit is ready for operation If the READY indicator does not come on within seven seconds after the unit is powered on recheck all connections and switch settings and retry the power on sequence If the READY light still fails to come on contact National Instruments Operation The GPIB PRL is now ready to operate All characters sent to the unit will be received at full speed and stored in the internal data buffer The characters will be sent to the receiving device at the rate of the receiving device If using the GPIB PRL in P mode turn on the GPIB instrument before turning on the GPIB PRL and be sure the configuration switches are set correctly Simply send data to your parallel port as you would if you had a parallel device connected to it and the data will be converted and sent to the GPIB instrument If you are using a standard software package such as a word National Instruments Corp 2 7 GPIB PRL User Manual Installation and Operations Chapter 2 processor with printing capabilities the program will typically send the data automatically to the parallel port when printing is selected If using the GPIB PRL in G mode simply address the GPIB PRL to listen if not in listen only mode and send the desired data to the interface The data will be received and passed along automatically to the device connected to th
24. ration If switches 4 8 are on all 30 possible listen addresses are sent This is useful if you do not know or do not care what your GPIB device s primary address is By sending all possible listen addresses the GPIB PRL is sure to send out the one your instrument is expecting This could also be used in a scheme where you have more than one printer or plotter of the same type producing multiple copies of a document or drawing The GPIB PRL will always assert REN when addressing other devices GPIB PRL User Manual 3 4 National Instruments Corp Chapter 3 Technical Information If switch 2 is ON and switch 3 is OFF the GPIB PRL will not send out a listen address but will be the System Controller and will assert IFC This mode can be used if the GPIB PRL is connected to a listen only device which does not require addressing In the above mentioned modes the GPIB PRL will be programmed as a talk only device If switch 2 is OFF and switch 3 is ON the GPIB address on the switch will be considered the GPIB PRL talk address In this mode the GPIB PRL will not be the System Controller and it does not have the ability to address itself or any other GPIB device There must be a GPIB controller on the bus which will address the GPIB PRL to talk and another GPIB device to listen If the parallel port signal INIT is asserted it will cause the GPIB PRL to clear its internal buffer Also either the SDC or DCL command mode dependent will be sent
25. s 1 Disconnect power to the unit and disconnect any cables that may be connected to the unit 2 Unscrew the two screws on the opposite sides of the rear panel 3 Grab the rear panel bezel and pull it straight away from the rest of the unit The card should slide out the back of the enclosure 4 Locate the configuration DIP switch U22 on the printed wire board 5 Set the switches for the desired mode of operation Refer to Set Configuration Switches later in this manual Caution Most of the circuitry in the GPIB PRL uses advanced CMOS technology and can be damaged by static electricity Avoid touching any of the components and take any necessary CMOS handling precautions 6 Close the unit and reinsert the screws removed in Step 2 National Instruments Corp 2 3 GPIB PRL User Manual Installation and Operations Chapter 2 Set Configuration Switches The DIP switch at location U22 on the printed wire board is used to configure the GPIB PRL Figure 2 3 shows the factory default settings Key Bf depressed side of switch handle annua Figure 2 3 Factory Default Settings for Dip Switch U22 Default Settings In Figure 2 3 switch 1 is in the OFF position this indicates that the unit is configured to operate in G Mode Switches 2 and 3 are in the OFF position this indicates no service request will be generated when the buffer becomes empty Switches 4 through 8 are in the OFF OFF ON OFF ON positions respective
26. s not expressly approved by National Instruments could void the user s authority to operate the equipment under the FCC Rules If necessary consult National Instruments or an experienced radio television technician for additional suggestions The following booklet prepared by the FCC may also be helpful How to Identify and Resolve Radio TV Interference Problems This booklet is available from the U S Government Printing Office Washington DC 20402 Stock Number 004 000 00345 4 Contents About This Manual 6 sisiicicnckakinaaiintnnnanweaniwn ix Organization of This Manual 0 0 eee ceeeeceeceseceeeeseeeeeeeeees ix Conventions Used in This Manual ceceeceeseeseeceeeeeeeeeeneeeee X Related Doc ument tions s sesini aia X Customer COMMUNICATION 0 00 ee eeeeeeeeeesseceececeeeeneeceneeceeeeaeeeee xX Chapter 1 Description of the GPIB PRL 0i 1 1 Introd ctiot cen nennen n ee en a n a 1 1 What Your Kit Contains 0 0 0 eee esceceneeesseeeeceeseeeesecereceaeeesaeceees 1 2 Optional Equipment oe eee eee eseeseeceessecneceaeceeeseeeeeeseees 1 3 GPIB PRL Specifications 20 0 0 eee eeeecceseeeeeceeeeecneessecseesaeenees 1 3 The GPIB PRL Front Panel rnenso nc numin areh i a i 1 4 The GPIB PRL Rear Panel 0 0 0 eecceeceesscesnceeseeesseceeeeceseeeneeeeees 1 6 The Parallel Connector iniae arri E ae a E a ia 1 7 The GPIB Connecti oesie ieni nenna e aiii 1 8 Chapter 2 Installation and Operation 00 0 0 eceeeteeteeteeeteeeeen
27. tely 100 usec Same as for pins 19 30 Signal Return Signal Direction Description Pin Pin 1 19 STROBE OUT usec 2 20 DATA1 OUT 3 21 DATA2 OUT 4 21 DATA3 OUT 5 23 DATA4 OUT 6 24 DATAS5 OUT 7 25 DATA6 OUT 8 26 DATA7 OUT 9 27 DATAS OUT 10 28 ACKNLG IN 0 5 usec 19 30 GND 31 INIT OUT 33 GND National Instruments Corp 3 3 GPIB PRL User Manual Technical Information Chapter 3 STROBE 0 5 usec min 0 5 usec min 0 5 psec min ACKNLG a 0 5 usec min k Figure 3 1 G Mode Parallel Interface Timing P Mode Operation P mode operation is similar to G mode operation except that the data is input from the parallel port and output to the GPIB port The incoming data is stored in the internal data buffer until it is accepted by the GPIB device The GPIB functionality implemented in P Mode is the ability to address a GPIB device to listen the ability to talk and send data and the ability to assert IFC and to send the device clear command Upon power on the GPIB PRL will read the status of the configuration switches and initialize the system If switch 3 is OFF the GPIB PRL will be the System Controller and will assert IFC for 500 usec The action of asserting IFC for at least 100 usec initializes the GPIB and makes the System Controller Controller In Charge CIC If switch 2 is also OFF the GPIB PRL will then send the GPIB listen address on switches 4 8 Switches 4 8 set the GPIB address configu
28. the status of the GPIB PRL buffer by performing a serial poll and analyzing the response byte If the Controller observes that the GPIB PRL buffer is empty it can then send data up to the buffer size to the GPIB PRL and send the Unlisten command to the GPIB PRL so the GPIB can be used by other devices If the GPIB PRL is serial polled its response byte will depend on the status of the internal data buffer If the buffer is empty a 41 hex will be returned as the status byte If the buffer is not empty a 0 will be returned The GPIB PRL will accept data at the GPIB address specified by the configuration switches The GPIB PRL also has the ability to be configured as a listen only device if all GPIB address switches are set to ON In this mode no addressing is required to make the GPIB PRL a GPIB listener and it cannot be unaddressed to listen All data transferred on the GPIB will be accepted by the GPIB PRL and output to the parallel port even if the data was intended for another device This scheme could be used to monitor all GPIB data bus activity Note When the GPIB PRL is configured as a listen only device it may not be serial polled If the GPIB PRL receives the universal Device CLear DCL command or its listen address and the Selected Device Clear SDC command the GPIB PRL will clear its internal data buffer and reset to its power up state The GPIB PRL will also pulse the parallel port signal INIT so that the parallel device
29. ts believes that the information in this manual is accurate The document has been carefully reviewed for technical accuracy In the event that technical or typographical errors exist National Instruments reserves the right to make changes to subsequent editions of this document without prior notice to holders of this edition The reader should consult National Instruments if errors are suspected In no event shall National Instruments be liable for any damages arising out of or related to this document or the information contained in it EXCEPT AS SPECIFIED HEREIN NATIONAL INSTRUMENTS MAKES NO WARRANTIES EXPRESS OR IMPLIED AND SPECIFICALLY DISCLAIMS ANY WARRANTY OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE CUSTOMER S RIGHT TO RECOVER DAMAGES CAUSED BY FAULT OR NEGLIGENCE ON THE PART OF NATIONAL INSTRUMENTS SHALL BE LIMITED TO THE AMOUNT THERETOFORE PAID BY THE CUSTOMER NATIONAL INSTRUMENTS WILL NOT BE LIABLE FOR DAMAGES RESULTING FROM LOSS OF DATA PROFITS USE OF PRODUCTS OR INCIDENTAL OR CONSEQUENTIAL DAMAGES EVEN IF ADVISED OF THE POSSIBILITY THEREOF This limitation of the liability of National Instruments will apply regardless of the form of action whether in contract or tort including negligence Any action against National Instruments must be brought within one year after the cause of action accrues National Instruments shall not be liable for any delay in performance due to causes beyond its reasonable control The warrant
30. y provided herein does not cover damages defects malfunctions or service failures caused by owner s failure to follow the National Instruments installation operation or maintenance instructions owner s modification of the product owner s abuse misuse or negligent acts and power failure or surges fire flood accident actions of third parties or other events outside reasonable control Copyright Under the copyright laws this publication may not be reproduced or transmitted in any form electronic or mechanical including photocopying recording storing in an information retrieval system or translating in whole or in part without the prior written consent of National Instruments Corporation Trademarks MicroGPIB is a trademark of National Instruments Corporation Product and company names listed are trademarks or trade names of their respective companies Warning Regarding Medical and Clinical Use of National Instruments Products National Instruments products are not designed with components and testing intended to ensure a level of reliability suitable for use in treatment and diagnosis of humans Applications of National Instruments products involving medical or clinical treatment can create a potential for accidental injury caused by product failure or by errors on the part of the user or application designer Any use or application of National Instruments products for or involving medical or clinical treatment must
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