Alarms
An alarm is a condition on a tag. It is digital (a Bool tag or a word bit) or analog (a comparison with a limit).
Parameters
Section titled “Parameters”| Parameter | Meaning |
|---|---|
| Name | Unique; used to acknowledge the alarm and find it in the journal |
| Tag, bit | The source; the bit is for status words |
| Condition | On, off, above, below, equal, not equal |
| Limit | A number or another tag; the tag takes priority |
| Deadband | “Above 8.5” with a 0.1 deadband clears only below 8.4 |
| On delay | Filters out short spikes |
| Off delay | The condition must stay absent for this long |
| Priority | Critical, high, medium, low |
| Acknowledgement | Without it, an alarm disappears as soon as it clears |
| Message | {value}, {limit} and {unit} substitutions |
| Area | Plant area for filtering |
Operator work
Section titled “Operator work”Operators can acknowledge one alarm or all of them, which requires the Acknowledge permission. Shelving requires a separate permission.
Journal
Section titled “Journal”The journal is stored in %ProgramData%\Scadora\alarms.db and kept for 365 days by default. Set Scada:AlarmJournal:RetentionDays to change it.
