5.1.4   Acknowledge Point

'Acknowledge Point' or 'Acknowledge Tag' will Acknowledge the selected Tag or Block:Parameter.

If there are multiple alarms for a Tag (e.g. High and High Deviation), the Higher Priority Alarm is displayed and is acknowledged.

There is an Alarm Precedence: 1) Hi-Hi and Lo-Low 2) Hi and Lo, 3) ROC and lowest 4) Deviation Alarms. 

Alarm Ack only acknowledges the highest priority alarm for that tag.  If there are multiple alarms for a tag, the next Alarm will appear immediately in the alarm summary after the Alarm Ack. For more information, see Alarms and Alarm Acknowledgement.