Data Browser Config View

Most of the configuration is adjusted in this view, accessible via the context menu of the plot window.
It has several sub-sections or "tabs".

"Process Variables" Tab

This subsection configures which PVs are shown in the plot and how. You can add PVs by entering their name in the "<Add PV>" cell of the "Process Variables" table. To delete PVs, select them and then use the context menu of the PV table.

You can change the axis assignment, color, and line width of each PV. For the the axis assignments, the number in the "Axis" column identifies the Y-Axes via numbers 0, 1, 2, ... So to put PVs on the same, first axis, enter "0". To place them on two axes, enter "0" or "1" for the respective PV.

The "Min" and "Max" settings determine the Y-Axis range. The "Type" selects a linear or log. axis. Since these settings modify the Y-Axis, they percolate to all PVs which are on the same axis.

For more detail see also Display Types and Request Types.

Archive Table, Formula

The lower half of the PV tab changes depending on the PV type. For PVs, it displays a table for archive data sources which are used to read samples for the selected PV.

The "Re-scale for new archived data" selection determines how newly received archived data is handled:

For formulas, the formula is shown.

Change archive data sources
To add archive data sources, Drag-and-Drop an archive from the Archive View onto a PV. You can drop them onto the Plot Window, which adds the source to all PVs in the plot, or onto a selected PV in the config view.
Then, you can rearrange the order of archives for a PV via the context menu of the "Archives used for ..." table.
To delete an archive data source from a PV, select the PV in the config view. Then, in the "Archives used for ..." table, select the archive data source to remove it via the context menu.

"Live Data Config" Tab

This subsection configures how often 'live' data samples are taken for the PVs, and how often the plot redraws. For example, one can sample a PV every 2 seconds, and redraw every 4 seconds. Note that redraws are quite costly in terms of CPU usage, so reducing the redraw rate by increasing the update period can help to reduce the CPU load.

"Time Config" Tab

Allows entry of the start and end time.

For a "scrolling" display, enter relative times that end in "now", for example a start specification of "-30 minutes" and an end of "now". Use the start/end time dialog, accessible via the "..." buttons, if the start/end time syntax is unclear.