The HORN parameter is a parameter associated with the current user that determines when the horn sounds and whether the horn has been enabled. The format for the parameter is THISUSER/HORN. The fields supported are:
HENAB (1 is enabled. 0 is disabled.)
CV (0 stops the horn from sounding.)
The HORN parameter is intended to be used only by the operator's alarm banner. Its use in other displays or by applications other than DeltaV Operate might interfere with the operation of the alarm banner and is not recommended.