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Chapter 11 Setting up HMI tag alarms
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Rockwell Automation Publication VIEWSE-UM006K-EN-E
Modifying HMI tag and alarm properties at run time
In a FactoryTalk View SE network distributed application, you can modify
HMI tag and alarm properties at run time, and have the changes take effect at
connected clients, without restarting the clients.
HMI tag properties can be modified in FactoryTalk View Studio, in the Tags
editor, in the HMI Tag dialog box (opened from the Tag Browser), or in the
Tag Import & Export Wizard.
HMI tag alarm properties can be modified in the Analog or Digital Alarms
editors, opened from the Tags editor. The AlarmAcceptEdits command
must be run for alarm changes to take effect.
In FactoryTalk View Studio, for a redundant network distributed application,
you can also replicate changes made at the primary server, to the secondary
server.
For information about:
Modifying HMI tag properties, see Modifying HMI tag properties on
page 372.
Modifying HMI tag alarm properties, see Modifying HMI tag alarm
properties on page 374.
Replicating changes from the primary to the secondary server, see
Replicate changes to the secondary HMI server on page 364.
You can customize and extend HMI tag alarm monitoring, by writing
alarm-detection algorithms using PLC ladder logic, custom programs, or
other appropriate tools.
You can then add alarm events to the HMI tag alarm subsystem, to respond
to the alarm-detection algorithms for annunciation, logging, printing, and
display in alarm summaries.
By using a tag name for an alarm event, you can customize the alarm features
of the tag. For example, you can use alarm events to provide a tag with more
than eight thresholds. You can also use alarm events to specify an alarm’s
time stamp.
Since alarms are scanned in the background, alarms that occur rapidly might
be shown out of sequence in FactoryTalk View SE, because they might all be
scanned at the same time, and therefore produce the same time stamp.
If the sequence, in which alarms occur is important, you might want to record
accurate time stamps for HMI tag alarms by buffering the alarms in the PLC,
and then using alarm events to record the alarms with accurate time stamps in
FactoryTalk View SE.
About FactoryTalk
View SE alarm
events