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Bacnet Trend Log Alarm Source Ext (bacnet-BacnetTrendLogAlarmSourceExt)

This component defines the intrinsic alarming/notification for a server-side Trend Log object exposed to BACnet. If needed, you paste it as a child of any of the BACnet trend log extensions under the source component.
Figure 93.   Bacnet Trend Alarm Sourc Ext properties
Image

This component is in the bacnet palette, under the Trending > BacnetLogExtensions folder.

Property Value Description
Notification Threshold number (defaults to 10) Indicates the value that once exceeded by the number of records since the last buffer-ready event was raised, a new buffer-ready event is raised.
Records Since Notification read-only Reports the number of records generated since notification.
Last Notify Record read-only Reports the last notification record generated.
Alarm Inhibit check-mark (defaults to the incoming value from the device) When null is enabled, reports the incoming value from the device. You cannot change this value.

To change this value, click the double-arrow to the right and remove the null check mark.
Alarm State read-only Displays the current state of the alarm: Normal, Low Limit, High Limit orFault.
Alarm Enable check boxes (defaults to toNormal) Selects the type of occurrence that generates an alarm.

toOffnormal generates an alarm when an entity transitions from normal to offnormal.

toFault generates an alarm when an entity transitions from normal to fault.

Acked Transitions read-only Reports information about the occurrence.
Notify Type drop-down list (defaults to Alarm) Identifies what happens to trigger a record in the trend log.
To Offnormal Times container When a point transitions to an offnormal state, reports four pieces of information:

Alarm Time displays when the alarm condition occurred.

Ack Time displays the time that the alarm was acknowledged.

Normal Time displays the time that the to-normal event occurred.

Count displays the total number of offnormal events.

To Fault Times container for four valuesAlarm Time defaults to null, which means that the event has not occurredAck Time defaults to nullNormal Time defaults to nullCount defaults to zero (0) When a point transitions to a fault state, reports four pieces of information:

Alarm Time displays the time that the to-fault event occurred.

Ack Time displays the time that the alarm was acknowledged.

Normal Time displays the time that the To Normal event occurred.

Count displays the total number of Offnormal events.

To Normal Times container Reports four pieces of information related to when a point transitioned to a normal state:

Alarm Time: when the event generated the alarm.

Ack Time: when the alarm was acknowledged.

Normal Time: when the state of the point returned to normal.

Count: the number of such alarms.

To Normal Text text Configures what displays when the component transitions to a normal status. When applicable, text entered for Fault Algorithm, High Limit Text and/or Low Limit Text may override this text.
Hyperlink Ord chooser Selects a chooser for locating an alarm source.
Alarm Class drop-down list Specifies or returns the alarm routing option for the component.

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