1description: >
2    Implement to provide critical class sensor thresholds.  Objects implementing
3    Sensor.Threshold.Critical must be instantiated in the correct hierarchy within
4    the sensors namespace.  The following sensor hierarchies are recognized:
5      airflow
6      altitude
7      current
8      energy
9      fan_tach
10      power
11      pressure
12      temperature
13      utilization
14      voltage
15
16    Additionally, any object implementing Sensor.Threshold.Critical must also
17    implement Sensor.Value.
18
19properties:
20    - name: CriticalHigh
21      type: double
22      default: NaN
23      description: >
24          The upper bound of the critical threshold.  A value of 'NaN' is used
25          to indicate there is no threshold of this type.
26    - name: CriticalLow
27      type: double
28      default: NaN
29      description: >
30          The lower bound of the critical threshold.  A value of 'NaN' is used
31          to indicate there is no threshold of this type.
32    - name: CriticalAlarmHigh
33      type: boolean
34      description: >
35          True if the sensor value has exceeded the defined bound.
36          False if the sensor value has not exceeded the defined bound.
37
38          CriticalAlarmHigh may be set to False to clear an alarm condition.
39          The behavior of setting CriticalAlarmHigh to True is undefined.
40    - name: CriticalAlarmLow
41      type: boolean
42      description: >
43          True if the sensor value has exceeded the defined bound.
44          False if the sensor value has not exceeded the defined bound.
45
46          CriticalAlarmLow may be set to False to clear an alarm condition.
47          The behavior of setting CriticalAlarmLow to True is undefined.
48signals:
49    - name: CriticalHighAlarmAsserted
50      description: >
51          The high threshold alarm asserted.
52      properties:
53         - name: SensorValue
54           type: double
55           description: >
56               The sensor value that triggered the alarm change.
57    - name: CriticalHighAlarmDeasserted
58      description: >
59          The high threshold alarm deasserted.
60      properties:
61         - name: SensorValue
62           type: double
63           description: >
64               The sensor value that triggered the alarm change.
65    - name: CriticalLowAlarmAsserted
66      description: >
67          The low threshold alarm asserted.
68      properties:
69         - name: SensorValue
70           type: double
71           description: >
72               The sensor value that triggered the alarm change.
73    - name: CriticalLowAlarmDeasserted
74      description: >
75          The low threshold alarm deasserted.
76      properties:
77         - name: SensorValue
78           type: double
79           description: >
80               The sensor value that triggered the alarm change.
81