IBLOC

Board-Level/Device-Level

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Purpose

Go to Local.

Format

C

unsigned long ibloc (int ud)

Visual Basic

CALL ibloc (ud%)

or

status% = illoc (ud%)

Interactive Control (Usage Notes)

ibloc

Input

ud	Board or device descriptor

Output

Function Return

The value of Ibsta

Description

Board-Level

ibloc places the board in local mode if it is not in a lockout state. The board is in a lockout state if LOK appears in the status word Ibsta. If the board is in a lockout state, the call has no effect.

The ibloc function is used to simulate a front panel RTL (Return to Local) switch if the computer is used as an instrument.

Device-Level

Unless the REN (Remote Enable) line has been unasserted with the IbcSRE option in ibconfig, all device-level calls automatically place the specified device in remote program mode. ibloc is used to move devices temporarily from a remote program mode to a local mode until the next device function is executed on that device.

Possible Errors

EBUS	Device-level: No devices are connected to the GPIB.
ECIC	Device-level: The access board is not CIC. See Device-Level Calls and Bus Management.
EDVR	The NI-488.2 driver is either configured incorrectly or is not properly installed.
EHDL	ud is invalid or out of range.
ELCK	The requested operation could not be performed because of an existing lock by another process.
ENEB	The interface is not installed or is not properly configured.
EOIP	Asynchronous I/O is in progress.