Rockwell Automation 9301 Series RSView32 Users Guide - Manual (Page 143)

Configuring alarms
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6–17
Using wildcards in alarm expressions
For built-in alarm functions, you can use wildcards in the expression
to retrieve information about multiple tags at once.
For example, the following expression checks if any of a group of tags
is in alarm:
ALM_IN_ALARM (alarm*)
where alarm* represents all tags whose names begin with “alarm.” If
one or more of these tags are in alarm, the expression result is 1. If all
of the tags are out of alarm, the expression result is 0.
Note that using wildcards in alarm expressions may have an impact on
performance if the pattern matches a large number of tags. See “Tag
functions” on page 14-15 for a list of the alarm functions.
Acknowledge bit (globally acknowledging
alarms)
When you set up an acknowledge bit for a tag, all RSView32 stations
can be set up to monitor that bit automatically at runtime. When an
operator acknowledges an alarm for that tag, the acknowledge bit is
set. If an alarm is acknowledged on one machine, all other machines
log a RmAck (Remote Acknowledge) transaction in the alarm log file.
All other RSView32 stations then acknowledge the alarms associated
with that bit. In this way, operators can acknowledge alarms globally.
3.
This wildcard Does this
* Matches any number of characters, including the
backslash (\) character.
? Matches any single character.