National Instruments NI-488.2 Benutzerhandbuch

REM indicates whether the interface is in the remote state. REM is set 
whenever the Remote Enable (REN) GPIB line is asserted and the GPIB 
interface detects that its listen address has been sent either by the GPIB 
interface or by another Controller. REM is cleared in the following 
situations:

•

When REN becomes unasserted.

•

When the GPIB interface as a Listener detects that the Go to Local 
(GTL) command has been sent either by the GPIB interface or by 
another Controller.

•

When the 

ibloc

 function is called while the LOK bit is cleared in the 

status word.

CIC indicates whether the GPIB interface is the Controller-In-Charge. CIC 
is set when the 

SendIFC

 or 

ibsic

 call is executed either while the GPIB 

interface is System Controller or when another Controller passes control to 
the GPIB interface. CIC is cleared either when the GPIB interface detects 
Interface Clear (IFC) from the System Controller or when the GPIB 
interface passes control to another device.

ATN indicates the state of the GPIB Attention (ATN) line. ATN is set 
whenever the GPIB ATN line is asserted, and it is cleared when the ATN 
line is unasserted.

TACS indicates whether the GPIB interface is addressed as a Talker. TACS 
is set whenever the GPIB interface detects that its talk address (and 
secondary address, if enabled) has been sent either by the GPIB interface 
itself or by another Controller. TACS is cleared whenever the GPIB 
interface detects the Untalk (UNT) command, its own listen address, a talk 
address other than its own talk address, or Interface Clear (IFC).