You create an extended trend log to store log records for a longer period of time and free up memory in the automation server.
In WorkStation, in the System Tree pane, select the folder or EcoStruxure BMS server where you want to create the extended trend log.
On the File menu, point to New and then click Trend .
In the Create Object wizard, in the object type list, select Extended Trend Log .
In the Name box, type a name for the extended trend log.
In the Description box, type a description for the extended log.
Click Next .
In the Configure Extended Trend Log page, in the Monitored trend log box, enter the trend log that you want to transfer records from.
In the Smart log box, select if you want to use smart log:
Select True to enable the EcoStruxure Building Operation software to automatically optimize the transfer rate of records from the monitored trend log to the extended trend log.
Select False to manually specify the percentage threshold at which the trend log transfers its records to the extended trend log, and then select the percentage in the Threshold box.
In the Maximum transfer interval box, select the maximum length of time that can pass between transfers.
In the Configure Extended Trend Log page, in the Transfer trigger variable box, enter a trigger variable to force a transfer of all records from the trend log to the extended trend log. For more information, see Extended Trend Logs .
In the Log size box, enter the number of records to be stored before old ones are overwritten.
In the Available trend storage box, ensure that the available number of records is not exceeded.
Click Create .
The extended trend log is created and transfers and stores records from a trend log.