7.2.2   High Alarm

A High Alarm will generate an alarm when the value of the tag is above the Alarm Limit. The tag will remain in High alarm until it is acknowledged and the tag’s value drops below the alarm limit minus deadband.

If a High-High Alarm is also configured and the tag’s value increase above the High-High Limit, the High-High Alarm will be reported and the point will go out of High Alarm.

The Alarm Limit is set during configuration of the tag, but can be changed in run-time VIEW while on-line from the point detail display if the user has access to the Security Level 127 configured for Tag Fields.  The alarm Limit can also be changed by appending the .ALMHI to the tagname in the Point Info Dialog Box (point Browser).

The relevant fields to consider when configuring a High Alarm are the
Hi Alarm Priority, Hi Alarm Limit, the Deadband, and the Span High and Span Low of the Tag.

To configure a High Alarm see 7.4Alarm Configuration.

1.      Enter a non-zero Alarm Priority by clicking on the field in the field labeled Hi Priority. This is an abbreviation for High Alarm Priority.

If you are using a High-High Alarm also, then the High Alarm Priority must be less than or equal to the High-High Alarm priority.

2.      Enter a numeric value for the HI Alarm Limit. The alarm limit is in  engineering Units.

If you are using the High-High Alarm also, then the High Alarm Limit must be less than the High-High Alarm Limit.