The output from an algorithm can feed back into a station to optimize energy, reduce faults, or perform any other task based
on historical and current conditions. For example, if an algorithm determines that a hot water valve is open while room temperature
is high for an hour or more, standard Wire Sheet logic can close the hot water valve. This type of closed-loop analytics uses a control point with an Analytic Proxy Extension
from the Points sub folder of the analytics palette..
Prerequisites: Standard logic already exists.
- Open the analytics palette and expand the Points folder.
- Go to the Wire Sheet view of a component in the station where you plan to configure the logic sequence.
- Drag an analytics NumericPoint to the Wire Sheet.
This action drags an object from the analytics palette to a non-analytics wire sheet, a powerful feature of the software.
- Right click the numeric pointand select or , then expand the proxy extension property.
A new Analytic Proxy Extension status is in fault because the Data property is not configured. The Pollers component under the AnalyticService includes a frozen property named Default, which is a cyclic poller configured for 5 minutes. A new Analytic Proxy Extension Poller property's default value maps to this default poller and may need to be configured to a dynamic, user-added poller.
- Configure the
Data property to reference the desired tag, tag group or algorithm.
- Configure the
Node property to reference the component in the station (config or hierarchy space).The framework uses the value of the Node property as the base from which to search for the required data
- Configure the
Poller property to specify how often the framework automatically processes the configured Data property and updates the control point's Out slot value.When the Poll action is invoked either manually or automatically by the configured Poller, the framework updates the Analytic Proxy Extension’s Last Poll property with the current station time.