csmstr - Omega Engineering

EDITING INTEGER TAGS
CRIMSON USER MANUAL - MODULAR CONTROLLER
MODE
Data Match
Data Mismatch
Absolute High
Absolute Low
ALARM WILL ACTIVATE WHEN…
The value of the tag is equal to the alarm’s Value.
The value of tag is not equal to the alarm’s Value.
The value of the tag exceeds the alarm’s Value.
The value of the tag falls below the alarm’s Value.
The following modes are only available when a setpoint is defined…
MODE
Deviation High
Deviation Low
Out of Band
In Band
ALARM WILL ACTIVATE WHEN…
The value of the tag exceeds the tag’s Setpoint by an
amount equal to or greater than the alarm’s Value.
The value of the tag falls below the tag’s Setpoint by an
amount equal to or greater than the alarm’s Value.
The tag moves outside a band equal in width to twice the
alarm’s Value and centered on the tag’s Setpoint.
The tag moves inside a band equal in width to twice the
alarm’s Value and centered on the tag’s Setpoint.
• The Value property is used to define either the absolute value at which the alarm
will be activated, or the deviation from the setpoint value. The exact
interpretation depends on the event mode as described above.
• The Hysteresis property is used to prevent an alarm from oscillating between the
on and off states when the process is near the alarm condition. For example, for
an absolute high alarm, the alarm will become active when the tag exceeds the
alarm’s value, but will only deactivate when the tag falls below the value by an
amount greater than or equal to the alarm’s hysteresis. Remember that the
property always acts to maintain an alarm once the alarm is activated, and not to
modify the point at which the activation occurs.
• The remainder of the properties are as described for the Alarms tab of flag tags.
THE TRIGGERS TAB
The Triggers tab of an integer variable or formula contains the following properties...
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