About deviation alarms at runtime
- Last UpdatedJul 17, 2024
- 1 minute read
When the Attribute is set to NaN, the following occurs:
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The quality of the Deviation attribute is set to UNCERTAIN.
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The value of the Deviation attribute will remain unchanged until it receives a value quality of GOOD.
Limit checking for each deviation is as follows:
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If (Absolute value (Attribute value - Target) > Tolerance && (TimeSinceTargetChange > Settling Period)) then set Condition=TRUE.
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If (Absolute value (Attribute value - Target + Deadband) <= Deviation && Condition=TRUE) then set Condition=FALSE.