A user can acknowledge an alarm to inform other users that the alarm has been seen and, if necessary, the condition that set off the alarm is being investigated and worked on.

How the Alarm Viewer responds when a user clicks Ack, depends on what was configured on the Alarm Options tab in the Alarm Definition (or Point Properties) dialog box.

On Alarm Options	In Alarm Viewer	Alarm ID
Reset is required	Reset is not clicked and No auto reset	Font color changes
	Reset is clicked or Auto reset	Is deleted
Reset is not required		Is deleted

More information

Option 3.2. Ack and/or Reset Buttons: Acknowledge and Reset alarms.

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