Measurement Computing GPIB-488.2 - Manual (Page 36)

3-18 IOtech to Associated MCC APIs
986992 GPIB 488.2 Porting Guide
IOtech GPIB Command Associated MCC GPIB 488.2 Command(s)
Lol SendLol
SetRWLS
Syntax
Lol INT WINAPI Lol(DevHandleT devHandle);
SendLol SendLLO(int board)
SetRWLS SetRWLS(int board, short addresslist [])
Usage Notes
Lol is no longer to be used. The Lol command caused Driver488 to issue an IEEE 488
LocalLockout (LLO) bus command. Devices that support this command were inhibited from
being controlled manually from their front panels.
SendLol sends the GPIB Local Lockout (LLO) message to all devices. This means that once
they have been addressed as listeners, the devices will respond only to messages sent over the
GPIB by the Controller. In other words, they can not be locally programmed from front panel
controls. Only the Controller can return them to a local programming state. In the following
example, GPIB board 0 sends a Local Lockout to all GPIB devices connected to it.
Example: SendLLO (0);
SetRWLS is used to put all devices into the Remote state, with Local Lockout and addresses
specified devices as Listeners. This routine puts the specified devices in remote mode with
local lockout. The system controller asserts the REN (Remote Enable) line and addresses the
specified devices as listeners. These devices can then be programmed by messages sent over the
GPIB bus; in other words, they can not be locally programmed from front panel controls.
In the following example, all devices controlled by GPIB board 0 are put into Remote mode.
Devices 6 and 7 are then addressed as Listeners by the Controller.
Example:
short addresslist[3] = {6, 7, NOADDR};
SetRWLS(0, addresslist);