Rockwell Automation FactoryTalk View Site Edition Users Guide - Manual (Page 221)

11 • S ETTING UP HMI TAG ALARMS
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A single HMI tag alarm summary can show alarms from multiple HMI servers located on
different computers. Each HMI server maintains a list of up to 2,000 alarms.
As new alarms occur, they are shown at the top of the list in the alarm summary. When the
list is full and a new alarm is generated, the alarm at the bottom of the list (the oldest
alarm) is acknowledged automatically by the system, and then dropped from the list.
In the alarm log file, alarms acknowledged automatically by the system are identified by
SysAk (system-acknowledged) in the TransType (transaction type) field.
Alarms are also dropped from the alarm summary when they are out of alarm, and
acknowledged manually. When alarms are dropped, they are removed from memory.
When the AlarmOff command is run, the entire contents of the alarm summary are
erased.
When setting up an HMI tag alarm summary, you can specify which alarm information to
show, and how the information will appear in the alarm summary.
For example, you can specify a different color for each alarm incident: low-severity
alarms could be set up as blue, medium-severity as yellow, and high-severity as red. This
would make it possible for an operator to identify the severity of alarms at a glance.
For information about creating alarm summaries, see page 11-33.
Graphic displays and objects
FactoryTalk View SE makes HMI tag alarm status information available to graphic
displays through a set of system tags.
You can use these system tags with numeric and string display objects, to show specific
information about HMI tag alarms in graphic displays. For details, see “Alarm system
tags,” next.
You can also attach visibility and color animation to affect the appearance of objects that
display alarm status information.
The HMI Tag Alarm Information graphic library contains alarm-related graphic objects,
for example, an alarm banner, that you can drag into a graphic display. Use the graphic
objects in the library as they are, or modify them to suit the application’s needs.
AlarmOff is just one of the FactoryTalk View commands used with HMI tag alarms. For details
about AlarmOff and other commands, see the FactoryTalk View Site Edition Help.