Using expanded summary alarms

When you define a tag and select Expanded Summary as its acknowledgement model, an operator must acknowledge that an alarm occurred even if the state triggering the alarm has returned to normal. Acknowledging an alarm changes the color of the alarm entry but does not change the time stamp. Alarms only clear from the display when they are acknowledged and the alarm has returned to a normal state.

Note: When you define a tag with the expanded summary acknowledgement mode, the RTN Implies ACK option in the Alarm Properties dialog box does not apply to the tag.