National Instruments GPIB-SCSI-A, Руководство пользователя

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Appendix B Status and Message Information
© National Instruments Corp. B-3 GPIB-SCSI-A User Manual
LOK 128
The LOK bit indicates if the GPIB-SCSI-A is in a lockout
state. The LOK bit is set whenever the GPIB-SCSI-A
detects that the Local Lockout (LLO) message has been
sent either by the GPIB-SCSI-A or by another Controller.
The LOK bit is cleared when the Remote Enable (REN*)
GPIB line becomes unasserted either by the
GPIB-SCSI-A or by another Controller.
REM 64
The REM bit indicates if the GPIB-SCSI-A is in remote
state. The REM bit is set whenever the Remote Enable
(REN*) GPIB line is asserted and the GPIB-SCSI-A
detects that its listen address has been sent either by the
GPIB-SCSI-A or by another Controller. The REM bit is
cleared whenever REN* becomes unasserted, or when the
GPIB-SCSI-A as a Listener detects the Go to Local
(GTL) command sent either by the GPIB-SCSI-A or by
another Controller, or when the
loc
function is called
while the LOK bit is cleared in status.
CIC 32
The CIC bit indicates if the GPIB-SCSI-A is the
Controller-In-Charge. The CIC bit is set whenever
sic
is called while the GPIB-SCSI-A is System Controller, or
when another Controller passes control to the
GPIB-SCSI-A. The CIC bit is cleared whenever the
GPIB-SCSI-A detects Interface Clear (IFC*) from some
other device that is System Controller, or when the
GPIB-SCSI-A passes control to another device.
ATN 16
The ATN bit indicates the state of the GPIB Attention
(ATN*) line. The ATN bit is set whenever the GPIB
ATN* line is asserted and cleared when the ATN* line is
unasserted.