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Tracker deviation alarms
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If your system uses solar trackers, the Tracker deviation alarm can provide insights into faulty units. VCOM monitors each tracker’s position and triggers an alarm when the deviation from the expected angle exceeds a set threshold.
Alarm trigger options:
Deviation angle: The default is ≥5°.
Median value: The median of all available tracker angles. This is used as a fallback when deviation data is not available. The median value will always be used if no deviation data is available (fallback method).
Once an alarm is triggered, you can see the measured deviation in the Alarm details.
Tracker deviation values are automatically calculated with every data update. You can use the following datapoints in the Chart generator, User-defined static alarms, and User-defined comparison alarms:
AZIMUTH_DEVIATION: Difference between the actual and target azimuth angle of a tracker
ELEVATION_DEVIATION: Difference between the actual and target elevation angle of a tracker
Example
In the example below, a critical alarm will be triggered if the expected angle deviates by 5° or more. A delay period of 60 minutes ensures that short downtimes are not reported as an alarm.
Tracker deviation alarm settings