Px view usage of Lon data
For simple monitoring from Px views, data bind Px widgets to Lon component ords to retrieve LonData values, without requiring
proxy point creation. However, note the following about this LonData usage:
- Polling fetches Lon data values, whereas, if you create proxy points for items, you can use the Lon Link Manager to create
Lon binds to the local device to receive values via nv updates. Overuse of polling may adversely affect Lon network traffic.
- Data logging or alarming (on value) requires a proxy point, where you add and configure history and/or alarm extensions.
- Using Lon data values in station control schemes requires proxy points.
- An nvi, nci, or cp represented with writable proxy points offers a Px view, user right-click command access to set and override
values. However, if Px view access to these items is via Lon components (LonData), available actions are limited to Force
Read (poll) and Force Write (resend value in station).