Filter Groups Workspace

The Filter Group tab contains the Filter Configuration expander which facilitates creation and configuration for a new filter group. You can configure the Filter groups for value-based filtering of the COVs before being logged into the HDB. Filtering is based on the percentage or absolute value to optimize the HDB data. Thus, if the original value changes more than the set absolute\percentage value, the value passes the filtering.

You assign the filter group to a property in the Object Configurator tab, the COVs of that property are logged into the HDB based on the filter group associated with that property. The filter group configuration can be based on either percentage value or the absolute value. Only the COVs of the property, that fall in the filtering criteria of the configured absolute/percentage value, are logged into the HDB. Otherwise, it is ignored and not logged in the HDB.

Information

NOTE:
Value-dependent filtering can only be used for integer, unsigned integer or floating point data points!

The precision of the deadband value is restricted to 3 decimal places. This can lead to small rounding differences inside filtering when using very fine segmentation of values. Consider this when configuring a filtering such as when a value changes from 50 to 55.001).

Filter Configuration Expander

The Filter Configuration expander facilitates creation and configuration of a new filter group.

Filter Configuration Expander
Item	Description
Name	Type a unique name for the filter group.
Description	Description of Filter Group.
Valid	Checked, by default. Uncheck the Valid check box to disable the filter group. Once disabled, even if this filter group is assigned to any property, the COVs are not filtered according to the filter group definition.
Type	Value (Default)
Deadband type - Percentage	(Default selection) It is the percentage value by which the COV logging of the property is filtered. For example, if the current value of a property is 50 and you have set the Deadband Value as 10% then the next COV that gets logged in the HDB has the value as > 55 or < 45. The COVs for 51, 52, till 55 and similarly for 49, 48, till 45 are not logged. NOTE 1: Percentage deadband value should be atleast 1% or more. NOTE 2: Any change in the quality for the subsequent COVs would result in the value getting logged in the HDB even if it is within the deadband.
Deadband type - Absolute	Change the default selection to Absolute, when you want to filter the COV logging of the property by absolute value. For example, if the current value of a property is 50 and you have set the Deadband Value as 10 then the next COV that gets logged in the HDB has the value as > 60 and < 40. The COVs for 51, 52, till 60 and similarly for 49, 48, till 40 are not logged. NOTE 1: Absolute deadband value should be atleast 0.001or more. NOTE 2: Any change in the quality for the subsequent COVs would result in the value getting logged in the HDB even if it is within the deadband.
Deadband value	It can be a percentage or absolute value depending on the selected Deadband type. Change the deadband value as required. 0.001 is the difference between the filter group percentage or absolute value configured and the value that gets qualified for COV logging.

Filter Group Toolbar

The filter group toolbar facilitates you to configure the filter group.

Filter Group Toolbar
	Creates a new filter group.
	Deletes the filter group. If you have linked a filter group to a property, deleting the filter group de-links that filter group from the property.
	Saves the currently opened filter group.
	Saves the configuration of the currently selected filter group as a new filter group.