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The set of signals configured will trigger the alarm if 1 threshold is true, or all thresholds are true. This is set by the
AND/OR condition at the top of the dialog.
Figure 9.6
Analog Combination Trigger
9.4 Logic (Digital) Signal Alarm Trigger
An alarm based on the logic state of the digital input is configured by selecting the “Logical Channels” option. Following
the typical convention of a 1, 0 and X to denote true, false and “dont’t care” respectively, is used to set the digital patter
to trigger on. Also, using the “AND” or “OR” conditions select when the trigger occurs. With the “AND” condition, all
signals defined must be true for the Alarm to trigger. In the “OR” case, any valid signal, excluding the “X” signals will
trigger an alarm.
Figure 9.7
Digital Trigger