Polled network variables
Some Lonworks devices include one or more nvos that are polled types, meaning that the nvo does not send nv updates upon a
value changes. Such an nvo must be polled. Any such nv represents a data item that does not frequently change.
Figure 6. Lon component example of polled only nvo
You access these properties by expanding the Lon network, followed by expanding a device container, a Lon point, the Nvo container,Nv Props container.
In the Lon device object, any such nvo Lon component appears with its read-only Polled property set to true (as found under its Nv Props container).
If you create a proxy point for such an nvo and bind to it in the Lon Link Manager, it still polls to receive value updates. Also, when creating a link (bind) between two Lon devices, the Link Editor only allows polled outputs to be linked to polled inputs.