National Instruments NI-488.2 User Manual page 94

LACS (brd)
DTAS (brd)
DCAS (brd)
© National Instruments Corporation
LACS indicates whether the GPIB interface is addressed as a Listener.
LACS is set whenever the GPIB interface detects that its listen address
(and secondary address, if enabled) has been sent either by the GPIB
interface itself or by another Controller. LACS is also set whenever the
GPIB interface shadow handshakes as a result of the
LACS is cleared whenever the GPIB interface detects the Unlisten (UNL)
command, its own talk address, Interface Clear (IFC), or that the
function has been called without shadow handshake.
DTAS indicates whether the GPIB interface has detected a device trigger
command. DTAS is set whenever the GPIB interface, as a Listener, detects
that the Group Execute Trigger (GET) command has been sent by another
Controller. DTAS is cleared on any call immediately following an
call, if the DTAS bit is set in the
DCAS indicates whether the GPIB interface has detected a device clear
command. DCAS is set whenever the GPIB interface detects that the
Device Clear (DCL) command has been sent by another Controller, or
whenever the GPIB interface as a Listener detects that the Selected Device
Clear (SDC) command has been sent by another Controller.
If you use the
ibwait
wait is completed, DCAS is cleared from
call. The same is true of reads and writes. If you call a read or write function
such as or
ibwrt Send
aborted. DCAS is cleared from
Appendix B
mask parameter.
ibwait
or function to wait for DCAS and the
ibnotify
ibsta
, and DCAS is set in
after the next NI-488.2 call.
ibsta
B-5
Status Word Conditions
function.
ibgts
ibgts
ibwait
after the next NI-488.2
, the I/O operation is
ibsta
NI-488.2 User Manual for Windows