Alarms
Attributes
Overview:
| Attribute | Datatype | Category |
|---|---|---|
| name | string | mandatory |
| description | string | optional |
| state | enum | runtime |
| timestamp | timestamp | runtime |
| severity | number | mandatory |
| authority | string | runtime |
| acknowledge mode | enum | mandatory |
| archivation mode | enum | mandatory |
name
[mandatory]
Uniquely identifies the alarm. Must conform to C-language symbol name requirements (can contain only letters, digits and the underscore, can't start with digit) and must be unique among all alarms.
Description
[optional]
Free text description of alarm purpose.
state
[runtime]
Current alarm state. Possible values:
| State | Active | Acknowledged | Description |
|---|---|---|---|
| INACT_ACK | no | yes | Initial state |
| ACT_UNACK | yes | no | Right after activation |
| ACT_ACK | yes | yes | Active alarm was acknowledged |
| INACT_UNACK | no | yes | Alarm deactivated, but not acked yet |
timestamp
[runtime]
Timestamp of last alarm state update.
severity
[mandatory]
Positive number describing alarm severity value. Exact values are application specific and freely assignable by system designer. Lower number = more severe alarm.
authority
[runtime]
Identity of latest process or user manipulating alarm state.
acknowledgement mode
[mandatory]
Valid values:
| Mode | Description |
|---|---|
| manual | after deactivation alarm remains in INACT_UNACK state until acknowledged |
| auto | after deactivation alarm goes to state INACT_ACK automatically |
archivation mode
[mandatory]
| mode | description |
|---|---|
| none | CO is not archived |
| change | CO is archived on every value change |
| periodic | CO is archived with fixed archivation period |