National Instruments GPIB-SCSI-A, Руководство пользователя

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G Mode Functions Chapter 7
GPIB-SCSI-A User Manual 7-94 © National Instruments Corp.
stat - Return GPIB-SCSI-A Status
Type: General Use function
Syntax:
stat [[c] n]
<
CR>
or
stat [c] s<CR>
or
stat [c] b<CR>
or
stat [c] n s b<CR>
Purpose: Use
stat
to obtain the status of the GPIB-SCSI-A to see if
certain conditions are currently present. You use
stat
most
often to see if the previous operation resulted in an error.
Remarks: The GPIB-SCSI-A returns status information to you in a form
depending on the mode, or combination of modes, you
selected.
n
indicates that the status information is returned as
numeric strings.
s
indicates that the status information is
returned in symbolic format – that is, as mnemonic strings.
b
indicates that the status information is returned as four bytes
of binary data.
c
indicates that the status is returned after each
programming message, eliminating the need to call
stat
repetitively.
Normally, you use
s
(the symbolic format only) when you are
debugging your code and you want to print the mnemonic for
easy reference.
The status information returned by the GPIB-SCSI-A contains
four pieces of information:
• The GPIB-SCSI-A status
• A GPIB error code
• A SCSI error code
The GPIB-SCSI-A returns a <CR><LF> following each piece
of the response, except for binary responses.