Issue
Creating an Extended Trend Log for b3 (Infinet i1/i2) Point and Value Logs
Product Line
EcoStruxure Building Operation
Environment
- b3 BACnet Controller
- Infinet i1 & i2 Controller
- Building Operation Automation Server, AS, ASP, ASB
- Extended Trend Logs (ETLs)
Cause
Using an extended trend log to store log records for long periods of time. The extended trend log is often saved on a higher-level server with more storage capacity. This extra storage capacity enables the server to store more records before overwriting the old ones. For more information, see WebHelp. Configure extended trend logs for b3/i1/i2 devices the same way as configuring extended trend logs in other Building Operation devices. There is one difference, however. do not use smart logs when configuring extended trend logs in b3 BACnet devices. Instead of using smart logs, use the Maximum Transfer Interval property to specify the transfer interval.
Resolution
- In Listview, select the b3/Infinet Object (point or value), click Properties/Advanced
- Multiply the "Log records" by the "Log interval" to calculate the maximum transfer interval.
The "maximum transfer interval" is the frequency at which the extended trend log will transfer log records from the b3/Infinet Object before any entries in the b3/Infinet controller log are overwritten - Right click the object, choose New then "Extended Trend Log"
- In the Create Object box, set Smart Log to False, Set the "Maximum transfer interval" to less than that calculated above (2)
- Click Create
For Infinet systems always refer to Infinet under the hood otherwise the creation is as the Webhelp for creating BACnet B3 Logs
In theory it would be possible to create the Extended Trend Log in an ES (where there is more storage capacity), but this could introduce other timing and bandwidth issues, so it is usually best to keep the first Extended Trend Log in the AS, then extend this to a second Extended Trend Log in the ES, as shown. (the second ETL in the ES scan use smart logging in the usual way)
If significant logging is required then External Log Storage should be considered. (the B3 or i1/i2 logs still need to be collected via Extended Trend Logs)
