National Instruments GPIB-SCSI-A, Руководство пользователя

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Status and Message Information Appendix B
GPIB-SCSI-A User Manual B-4 © National Instruments Corp.
TACS 8
The TACS bit indicates if the GPIB-SCSI-A has been
addressed as a Talker. The TACS bit is set whenever the
GPIB-SCSI-A detects that its talk address (and secondary
address, if enabled) has been sent either by the
GPIB-SCSI-A itself or by another Controller. The TACS
bit is cleared whenever the GPIB-SCSI-A detects the
Untalk (UNT) command, a talk address other than its
own, its own listen address, or IFC*.
LACS 4
The LACS bit indicates if the GPIB-SCSI-A has been
addressed as a Listener. The LACS bit is set whenever
the GPIB-SCSI-A detects that its listen address (and
secondary address, if enabled) has been sent either by the
GPIB-SCSI-A itself or by another Controller. The LACS
bit is also set whenever the GPIB-SCSI-A shadow
handshakes as a result of the
gts
function. The LACS
bit is cleared whenever the GPIB-SCSI-A detects that the
Unlisten (UNL) command, its own talk address, IFC*, or
gts
is called without shadow handshake.
DTAS 2
The DTAS bit indicates if the GPIB-SCSI-A has detected
a device trigger command. The DTAS bit is set whenever
the GPIB-SCSI-A, as a Listener, detects that the Group
Execute Trigger (GET) command has been sent by
another Controller. The DTAS bit is cleared in status at
the start of any subsequent programming message.
DCAS 1
The DCAS bit indicates if the GPIB-SCSI-A has detected
a Device Clear (DCL) command. The DCAS bit is set
whenever the GPIB-SCSI-A detects the DCL command
sent by another Controller. The DCAS bit is also set
when the GPIB-SCSI-A, as a Listener, detects the
Selected Device Clear (SDC) command has been sent by
another Controller. The DCAS bit is cleared in status at
the start of any subsequent programming message.