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For an alarm that needs to be acknowledged by the operator (when the alarm is triggered), select the check
box to enable the Acknowledgment. If checked, an operator is required to acknowledge this alarm any time it
is triggered, before it will be cleared from the Active alarm widget.
Reset
This check box, specific to each alarm, works in conjunction with the acknowledge check box. After an alarm
requiring acknowledgment has been acknowledged, it will be cleared from the alarm list. If the Reset check
box is checked, the alarm will continue to be listed in the alarm list, as "Not Triggered Acked", until the Reset
button present in the alarm widget is pressed.
Buffer
Specifies the Buffer file to which the Alarm history will be saved.
Trigger
This selection determines the triggering condition for an alarm.
Three Alarm types are available:
Limit Alarm
boundaries (low limit and high limit). When the Tag value is equal to its low or high limit, the alarm is
not triggered.
Bitmask Alarm To get a valid trigger, the bitwise AND operator compares each bit of the bitmask
with the Tag value corresponding to that Alarm. If both bits are on, the alarm is set to true. When the
Bitmask Alarm is selected, you can specify one or more Bit positions inside the Tag. When one of
the Bits is set, the alarm is triggered. The Bit position must be given in decimal format; if more Bits
are specified, each position must be separated by a ",".
Bitmask is a position, so it starts from zero (0).
Deviation Alarm
"deviation" will be given. If the percentage of deviation of the Tag value from the set point exceeds
this deviation, then the trigger condition becomes true.
Tag
Attach the Tag for which the Alarm shall periodically check the Tag value, so that the respective alarm(s) is
triggered when this deviates from its limits. (The Alarm function will refer to the value of this Tag, or to the
state of a Bit, in the case of Bitmask, to determine when to trigger the Alarm.)
Actions
Define the action(s) to be executed for the specific Alarm. Actions are executed by default when the
specified trigger condition becomes true. Additional conditions can be specified in the "Events" configuration
(in the last column of the Alarm editor, as explained in the chapter
ACGM0195V1EN
HMWIN Studio User Manual
A Limit Alarm is triggered when the monitored Tag value goes OUTSIDE of its given
For the Deviation Alarm, a predefined "set point", as well as a value for
Action
Enable).
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