National Instruments GPIB-SCSI-A, Руководство пользователя

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Appendix B Status and Message Information
© National Instruments Corp. B-17 GPIB-SCSI-A User Manual
If the Target that you wish to communicate with in G mode uses different
messages, or needs to be given different messages, you must use the low-
level commands provided.
Sense Keys
The following paragraphs describe the possible Sense keys that the
GPIB-SCSI-A can issue while operating in S mode. The Sense key is
returned in byte 2 of the sense data.
In G mode, the GPIB-SCSI-A does not generate Sense data. Instead, the
Sense data is generated by the individual SCSI device. For specific
information about the Sense keys issued by the SCSI devices, see the
instructions in your device documentation.
NO SENSE 0
This sense key indicates that there is no specific sense key
available. One way to receive this sense key is if the
previous command completes correctly.
ILLEGAL
REQUEST
5
This sense key indicates that there was an illegal opcode
or parameter in the Command Descriptor Block.
ERROR 9
This sense key indicates that the GPIB-SCSI-A
encountered some error on the last command. The source
of the error is determined by examining the GPIB error
indicator
(iberr)
and the SCSI error indicator
(scerr)
.
ABORTED
COMMAND
11
This sense key indicates that the GPIB-SCSI-A aborted
the command. The Initiator may be able to recover by
trying the command again.