Issue
Troubleshooting LON Network communications.
Product Line
EcoStruxure Building Operation, TAC Vista, TAC IA Series
Environment
- Xenta Controllers
- MNL I/A Controllers
- EcoStruxure Building Operation AS-P
- LPA Protocol Analyzer
Cause
Intermittent communication failures, high bandwidth, error packages, noise on the line -- these can be difficult to pin down and identify.
Resolution
These two documents attached produced by Loytec are invaluable resources in troubleshooting a LON network. The first deals with common causes of noise on LON Wires. The second details what to do once you've procured an LPA protocol analyzer -- how to use it and interpret data.
For a Vista system, also see Actions for reducing Bandwidth in a Vista network.
For an EcoStruxure Building Operation system, also see Bandwidth Throttling.
If an LPA protocol analyzer is not available there is also an option to log the Lon communication to and from the ES, AS-P, or AS-B.
To do that you change the debug level from "Information" to "Trace" for:
/Automation Server/System/Modules/Trace/Loggers/nsp/nsp.pin/nsp.pin.lon/nsp.pin.lon.comm
After the investigation make sure to set the debug level back to "Information" again.
For debugging assistance a Tool called SBO Lon Decoder can be used.
