We use a custom UDT for an alarm, with everything required for the alarm in the UDT, such as the setpoint, the enable, the active delay, the pipelines, etc. There is no way to change the alarm mode programatically, so we have to have two UDTs, one for above setpoint and another for below setpoint. If the alarm mode had binding, we could have a tag in the UDT that is used to set the mode to above or below, so only one UDT would be required.
[attachment=0]AlarmMode.JPG[/attachment]