Logging Data in Building Operation

In Architecture 1, historical data is collected in TrendLogs. TrendLogs can be fed by any Building Operation variables, including BACnet, LON, XML, or Modbus Point.

NOTE: When logging data in Building Operation, it is recommended to use interval trend log to log the raw data from meters. The cumulative raw data is then inserted into the PME database by PME EWS client or ETL tool. PME Dashboards and Reports have an aggregation mechanism to make use of the data. Hourly, daily, and monthly usage does not need to be calculated in Building Operation for PME use.

If both Trendlog and Extended Trendlog are used, it is recommended to send the data in the Trendlog to PME (via PME EWS Client or ETL) to avoid the lagging between Extended Trendlog and Trendlog.

It is recommended to plan the variables to be logged during the design phase so that the size of the Trendlog files can be forecast. Also, it is important to plan which Trendlogs are to be transferred to PME in order to forecast the size and growth of the database.