FALCON
USER GUIDE
EN2Z-0962GE51 R0715
234
•
Priority
Depending on the category, the alarm states NORMAL, OFF-NORMAL,
FAULT have different values in the corresponding priority range. Hence, the
priorities of the transitions (changes from one state to another state) are as
follows:
Transitions
Event (Alarm) Category
To Normal
To Off-Normal
To Fault
Urgent (range 0…84)
83
0
42
High (range 85…169)
168
86
127
Low (range 170…250)
250
171
210
Transition Causing Alarm
Displays the transition causing the alarm. Different datapoints may cause
different event types as shown in the following:
•
Change of state
Present value has changed to a new state for longer than the time delay.
Can be caused by BI, BV, MI, and MV.
•
Out of range
Present value has exceeded range between high limit and low limit for
longer than the time delay.
Or, present value has returned between the high limit - deadband and the
low limit + deadband range for longer than the time delay.
Can be caused by AI, AO, and AV.
•
Command failure
Present value differs from feedback value for longer than the time delay.
Can be caused by AO, BO, and MO.
•
From State … To State
Describes the event transition.
Examples:
From Normal to Off-normal
From Off-normal to Normal
•
New Value
Displays the new state of the datapoint, e.g. stage 1.
•
Deadband
Shows the deadband
•
Status Flags
Shows the set status flags:
−
In Alarm
When enabled, the datapoint is in alarm. Cause can be faults and Off-
Normal conditions.
−
Fault
When enabled, the datapoint or the physical input is not reliable, e.g. in
case of sensor break (Open Loop).
−
Overridden
When enabled, the datapoint is in manual operating state. The value has
been overwritten.
−
Out of Service
When enabled, the physical input is decoupled from the datapoint, e.g. in
case of manual override for inputs. The present value displayed is not the
present value, which would be delivered by the physical input.
NOTE:
Multiple flag indications may be possible.
Example:
A ´To-Fault transition` causes also always an alarm. Hence both,
the ´In Alarm` and the ´Fault` status flags are enabled.
•
Alarm Text
Displays the alarm text (message) and the alarm description.
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Страница 24: ...FALCON USER GUIDE EN2Z 0962GE51 R0715 20 Fig 7 Open BACnet LON System Architecture for Plant Control ...
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Страница 113: ...USER GUIDE FALCON 109 EN2Z 0962GE51 R0715 Fig 26 Alarm behavior of pulse converter datapoint ...
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