Notes and Limitations
Notes and Limitations
There are some limitations for aggregation sensors:
· One aggregation sensor can only work with either delta or gauge sensors.
· All channels used for an Aggregation Sensor should use the same unit setting (otherwise the generic unit “#/unknown” will be used).
· Due to timing and rounding effects you may see small discrepancies when comparing aggregation sensors with their source channels.
· You can not re-use Aggregation Sensors to create another Aggregation Sensor (folding).
· There is no sum channel for the aggregated sensor.
· In the graphs the data lines for Aggregation Sensors appear slightly shifted to the right (=later) compared to the data lines of the source channels because the aggregation sensor reads the data from the other sensors after they have aquired it, which creates a delay.
If delta sensors are used for aggregation:
· The scanning interval for the Aggregation Sensor must be at least three times the maximum scanning interval of the source sensors. The multiplier should always be an integer value (3 or higher).
· It is recommended that all source sensors should have the same scanning interval setting (e.g. 10 seconds sensor intervall and 30 seconds aggregation scanning, or 20 seconds & 60 seconds).
· Aggregated delta sensors ignore overflow values (see High Compatibility Mode).
If gauge sensors are used for aggregation:
· The scanning interval for the Aggregation Sensor should be the same as the scanning interval of all source sensors.
· It is recommended that all source sensors should have the same scanning interval setting.