National Instruments GPIB-PCII Getting Started

Also see for GPIB-PCII: Getting started

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National Instruments GPIB-PCII Getting Started Manual pdf 29 page image

Appendix B Changing Board and Device Characteristics© National Instruments Corp. B-3 GPIB-PCII/IIA for GraphicsNote: Do not give a GPIB device the same name as a directory or file on yourdisk drive.You can also use the configuration programs, IBCONF or WIBCONF, to examinethe current default settings in the handler file.If you do not make changes to the configuration, the default characteristics of thesoftware remain in effect.Primary Default CharacteristicsThe following are the primary default characteristics of the handler:• The GPIB-PC mode is assumed to be the default setting. SeeAppendix C, Hardware and Software Configuration, for more information onthe GPIB-PC mode.• There are 32 active devices with symbolic names DEV1 through DEV32.• GPIB addresses of these devices are the same as the device number. Forexample, DEV1 is at address 1.• The first 16 devices are assigned to GPIB0 as their access board, and thesecond 16 devices are assigned to GPIB1 as their access board. GPIB0 is thesymbolic name of the first GPIB-PCII/IIA board in your system. If you havean additional GPIB-PCII/IIA board in your system, its symbolic name isGPIB1.• Each GPIB-PCII/IIA is System Controller of its independent bus and has aGPIB address of 0.• The END message is sent with the last byte of each data message to a device.Each data message that is read from a device automatically terminates whenEND is received. No EOS character is recognized.• The time limit on I/O and wait function calls is approximately 10 seconds.• GPIB0 is a GPIB-PCII board at base I/O address 02B8 hex using DMAchannel 1 and no interrupt line, or GPIB0 is a GPIB-PCIIA board at base I/Oaddress 02E1 hex using DMA channel 1 and no interrupt line.