IRIS
Intelligent Roadway Information System
Alarms
Select View ➔ Maintenance ➔ Alarms menu item
An alarm is a device which has a boolean state indicating whether or not it is
triggered. The description of the alarm might indicate an equipment
failure, high temperature, low voltage, etc.
An alarm can be created for controllers using a protocol that generates alarms, such as MnDOT-170.
API Resources
iris/api/alarmiris/api/alarm/{name}
Attribute permissions:
| Access | Minimal | Full |
|---|---|---|
| Read Only | name, state | trigger_time |
| 🔧 Configure | description, controller | pin |
Events
The state field is set to true when triggered. When it changes, a
time-stamped record is added to the alarm_event table. These records are
purged automatically when older than the value of the alarm_event_purge_days
system attribute.