National Instruments GPIB-PC - Manual (Page 154)

Section Four A BASICA/QuickBASIC GPIB-PC Function Calls
©National Instruments Corp. 4A-79 GPIB-PC User Manual
The IBTMO function changes the length of time that the
following functions wait for the embedded I/O operation to
finish or for the specified event to occur before returning
with a timeout indication:
• IBCMD ,
• IBRD ,
• IBRDI ,
• IBWRT , or
• IBWRTI .
The IBTMO function also changes the length of time that
device functions wait for commands to be accepted. If a
device does not accept commands within the time limit,
the EBUS error will be returned.
When IBTMO is called and an error does not occur, the
previous value of ist is stored in IBERR% .
Device IBTMO Function:
When BD% specifies a device, the new time limit is used in subsequent
device functions directed to that device.
Board IBTMO Function:
When BD% specifies a board, the new time limit is used in subsequent
board functions directed to that board.
Refer also to IBWAIT and to Table 2.1.