National Instruments GPIB-PC - Manual (Page 119)

BASICA/QuickBASIC GPIB-PC Function Calls Section Four A
GPIB-PC User Manual 4A-44 ©National Instruments Corp.
BASICA/QuickBASIC BASICA/QuickBASIC
IBPCT IBPCT
Purpose: Pass Control
Format: CALL IBPCT (BD%)
Remarks: BD% specifies a device.
The IBPCT function passes CIC authority to the specified
device from the access board assigned to that device. The
board automatically goes to Controller Idle State (CIDS).
The function assumes that the device has Controller
capability.
IBPCT calls the board IBCMD function to send the
following commands:
• Talk address of the device;
• Secondary address of the device, if applicable; and
• Take Control (TCT).
Other command bytes may be sent as necessary.
Refer to IBCMD for additional information.
Device Example:
1. Pass control to the device IBMXT% .
100 CALL IBPCT (IBMXT%)