Alarm

Alarm System Overview

• Alarms are represented as Alarm objects, which are created and managed by the Alarm_Manager.

• A collection of Alarm_Rule s define the Condition s for raising Alarm s of different AlarmSeverity .

• The alarm manager is continuously fed SensorValues objects during PVP_Gui.update_gui(), which it uses to check() each alarm rule.

• The alarm manager emits Alarm objects to the PVP_Gui.handle_alarm() method.

• The alarm manager also updates alarm thresholds set as Condition.depends to PVP_Gui.limits_updated() when control parameters are set (eg. updates the HIGH_PRESSURE alarm to be triggered 15% above some set PIP ).

Alarm Modules

Alarm Manager

Computes alarm logic and emits alarms to the GUI

Alarm

Objects used to represent alarms

Alarm Rule

Define conditions for triggering alarms and their behavior

Condition

Objects to check for alarm state

Main Alarm Module

Data

ALARM_RULES

Definitions of all Alarm_Rule s used by the Alarm_Manager

Classes

AlarmSeverity(value)	An enumeration.
AlarmType(value)	An enumeration.

class pvp.alarm.AlarmType(value)

An enumeration.

Attributes

LOW_PRESSURE	int([x]) -> integer
HIGH_PRESSURE	int([x]) -> integer
LOW_VTE	int([x]) -> integer
HIGH_VTE	int([x]) -> integer
LOW_PEEP	int([x]) -> integer
HIGH_PEEP	int([x]) -> integer
LOW_O2	int([x]) -> integer
HIGH_O2	int([x]) -> integer
OBSTRUCTION	int([x]) -> integer
LEAK	int([x]) -> integer
SENSORS_STUCK	int([x]) -> integer
BAD_SENSOR_READINGS	int([x]) -> integer
MISSED_HEARTBEAT	int([x]) -> integer
human_name	Replace .name underscores with spaces

LOW_PRESSURE = 1

HIGH_PRESSURE = 2

LOW_VTE = 3

HIGH_VTE = 4

LOW_PEEP = 5

HIGH_PEEP = 6

LOW_O2 = 7

HIGH_O2 = 8

OBSTRUCTION = 9

LEAK = 10

SENSORS_STUCK = 11

BAD_SENSOR_READINGS = 12

MISSED_HEARTBEAT = 13

property human_name

Replace .name underscores with spaces

class pvp.alarm.AlarmSeverity(value)

An enumeration.

Attributes

HIGH	int([x]) -> integer
MEDIUM	int([x]) -> integer
LOW	int([x]) -> integer
OFF	int([x]) -> integer
TECHNICAL	int([x]) -> integer

HIGH = 3

MEDIUM = 2

LOW = 1

OFF = 0

TECHNICAL = -1

pvp.alarm.ALARM_RULES = OrderedDict([(<AlarmType.LOW_PRESSURE: 1>, <pvp.alarm.rule.Alarm_Rule object>), (<AlarmType.HIGH_PRESSURE: 2>, <pvp.alarm.rule.Alarm_Rule object>), (<AlarmType.LOW_VTE: 3>, <pvp.alarm.rule.Alarm_Rule object>), (<AlarmType.HIGH_VTE: 4>, <pvp.alarm.rule.Alarm_Rule object>), (<AlarmType.LOW_PEEP: 5>, <pvp.alarm.rule.Alarm_Rule object>), (<AlarmType.HIGH_PEEP: 6>, <pvp.alarm.rule.Alarm_Rule object>), (<AlarmType.LOW_O2: 7>, <pvp.alarm.rule.Alarm_Rule object>), (<AlarmType.HIGH_O2: 8>, <pvp.alarm.rule.Alarm_Rule object>)])

Definitions of all Alarm_Rule s used by the Alarm_Manager

See definitions here