Annex B (informative) Examples ToC Previous Next

B.1 Examples for Event sequences from Condition instances ToC Previous Next

B.1.4 Server current-State Model with Suppression ToC Previous Next

This example adds additional fields to the model illustrated in B.1.2. This example does not use acknowledge or confirm – it assumes that the alarm is automatically acknowledged (and does not support confirm). It does add OutOfServiceState and SuppressedState.

Figure B.3 shows an Alarm as it becomes active, is suppressed or is placed out of service and then inactive. Table B.1 lists the values of the state Variables. All Events are coming from the same Condition instance and therefore have the same ConditionId. The Client subscription includes an event filter that excludes suppressed or out of service conditions (i.e. SuppressedState = True or OutOfServiceState = True). The events shown in green are delivered to the Client.

readme_files/image034.png Figure B.3 – SuppressedState and OutOfServiceState example

Table B.3 – Example of a Condition that is Suppressed / OutOfService

EventId Active SupressedState OutOfServiceState Retain Event Deliver with Filter Description
-*) False False False False - Initial state of Condition.
1 True False False True Yes Alarm goes active.
2 True False True True Yes Placed OutOfService
3 True True True True No Alarm Suppressed; No event since OutOfService
4 False True True False No Alarm goes inactive; No event since OutOfService
5 False False True True No Alarm not Suppressed; No event since not active
6 True False True True No Alarm goes active; No event since OutOfService
7 True False False True Yes Alarm no longer OutOfService; Event generated
8 False False False False Yes Alarm goes inactive
9 False True False False No Alarm Suppressed; No event since not active
10 True True False True No Alarm goes active; No event since Suppressed
11 False True False False No Alarm goes inactive; No event since Suppressed
12 False False False False No Alarm no longer Suppressed
13 False False True False No Placed OutOfService
14 True False True True No Alarm goes active; No event since OutOfService
15 False False True False No Alarm goes inactive; No event since OutOfService
16 False False False False No Alarm no longer OutOfService

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