Manuals / Brands / Computer Equipment / Switch / National Instruments / Computer Equipment / Switch

National Instruments GPIB-COM Special Considerations When Using the GPIB-COM

1 56

Download 56 pages, 334.01 Kb

Configuration and Installation Section Two

GPIB-COM User Manual 2-8 © National Instruments Corporation

7. Check the installation.

8. Replace the expansion slot cover of your computer.

9. Connect the GPIB cable to the GPIB-COM.

Special Considerations When Using the GPIB-COM

The GPIB-COM does not support XON/XOFF protocols. If your application software uses

XON/XOFF protocols, send your printer and plotter output to a file on disk. From DOS, send

your file to the GPIB-COM by using the DOS command:

copy

filename

COM1:

copy

filename

COM2:

The DOS MODE command is used to set the RS-232 parameters that will be used when COM1

and COM2 are accessed through DOS. Sometimes a timeout error may occur when writing

through the GPIB-COM to a slow device such as a printer or a plotter. If this happens, use the

MODE command to disable the timeout function by typing MODE COM1:12,,,,P. Some

software applications use the COM port baud rate setting to control the data transmission speed.

To obtain the fastest possible transfer rates, set the baud rate setting to 9600 baud. The P at the end

disables the timeout. For more information on the MODE command, refer to the IBM Disk

Operating System Manual. This command can also be used in an autoexec.bat file to disable

timeouts when you start up the computer.

Contents

Main Page Page FCC/DOC Radio Frequency Interference Compliance Preface Introduction to the GPIB-COM Organization of This Manual Related Documents Abbreviations Used in This Manual Contents Page Figures Tables Section One Introduction GPIB-COM Characteristics What Your Kit Should Contain Optional Equipment Page Page Switch and Jumper Settings Base I/O Address and Interrupt Selection Talk/Listen Modes Talk/Listen Address and Special Function Selection Page Installation Special Considerations When Using the GPIB-COM filename Page Function Description Section Three GPIB-COM User Manual 3-2 National Instruments Corporation Figure 3-1 shows a block diagram of the GPIB-COM. GPIB Figure 3-1. Block Diagram of GPIB-COM GPIB-COM Components Page Section Four Running Diagnostic Tests The GPIB-COM Test Commands -1 printer test -2 plotter test -c change COM configuration -q quit Section Five Programming the GPIB-COM The GPIB-COM Registers Transmitter Holding Register Receive Buffer Register Divisor Latch Least Significant Byte (LSB) Register Divisor Latch Most Significant Byte (MSB) Register Interrupt Enable Register Page Interrupt Identification Register Line Control Register Page Modem Control Register Page Line Status Register Page Modem Status Register Page Programming the Serial Adapter Polling Method Interrupt-Driven Method The GPIB-COM Controller Function Appendix A Specifications Page Multiline Interface Messages Hex Oct Dec ASCII Msg Hex Oct Dec ASCII Msg Message Definitions Multiline Interface Messages Hex Oct Dec ASCII Msg Hex Oct Dec ASCII Msg Appendix C Operation of the GPIB History of the GPIB Types of Messages Talkers, Listeners, and Controllers System Controller and Active Controller GPIB Signals Appendix C Operation of the GPIB National Instruments Corporation C-3 GPIB-COM User Manual Figure C-1 shows the arrangement of these signals on the GPIB cable connector. Data Lines Handshake Lines NRFD (not ready for data) NDAC (not data accepted) Page Page Page Configuration Restrictions User Comment Form