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Alarms are used in SCADA systems to trigger information such as exceeding thresholds or activating digital variables that pose a danger or require action.

A simple way to use alarms in LAquis SCADA is using the columns Alarm, LI (Limit Inferior) and LS (Limit Superior).

If the tag is analog then use LI and LS as limits to trigger the Alarm. If the tag is digital then use the LI and LS as 0 and 0, for example.


Optionally, place a database in AlarmDataBase column to collect the alarms information in a parallel database.

Then with right mouse button over a button object, select the option Show this button’s report… and select the iAlarms Complete template to create a parallel alarms report.

Anyway, you can record this alarm in the main database if needed.

Now, back to the alarms issue, when the value exceeds the limits, the alarm column will report the alarm as default 1, above the limit, -1 below the limit, 0 without alarm.

Optionally, the alarm information can be showed using the property ShowLimits of the displaytext object:

Other way to show alarms is is this components:

To place descriptions to each alarm value, click on the cell of the column Status/Alarm and write the descriptions. The description will be placed on the property/column Status of the tags spreadsheel.

(See this complete example, download and unpack in a new folder: