New/Edit algorithm windows

New/Edit algorithm windows

These windows create and edit algorithm properties.

Figure 63. Edit algorithm window

This window opens when you click Edit in the Algorithm Manager view.

Property	Value	Description
Name	text	Provides a unique name for each algorithm.
Enabled	`true` or `false`	Activates (`true`) and deactivates (`false`) use of the object (network, device, point, component, table, schedule, descriptor, etc.).
Makes Trends	`true` (default) or `false`	Controls the processing of trend requests. `false` outputs a constant value for both value and trend requests. `true` outputs a trend with constant values for trend requests.
Aggregation	drop-down list (defaults to `First`)	Configures the default aggregation function passed through the algorithm when the Data Source block `Use Request Aggregation` property is set to `true` and the Aggregation property is not explicitly configured in the request. If aggregation is not enabled in the binding/settings window, the aggregation value defined in the Data Definition applies to all chart bindings, reports and tables. `And` returns the logical “and” of Boolean values. `Avg` returns the statistical mean, which is determined by calculating the sum of all values and dividing by the number of values. `Count` returns the total number or quantity of values in a combination. If you request this value on a binding in a PX view, the system counts the number of values based on the properties defined by the data source block and the algorithm’s Property Sheet. `First` returns the first value in the combination. `Last` returns the last value in the combination. `Max` returns the highest value in the combination. `Median` returns the value in the middle of a sorted combination—the number that separates the higher half from the lower half. `Min` returns the lowest value in the combination. `Mode` returns the statistically most frequently occurring number in the combination. `Or` returns the logical “or” of Boolean values. `Range` returns the statistical difference between the largest and smallest values in the combination. `Sum` adds together all values in the combination resulting in a single value. `Load Factor` returns the average value divided by peak value. `Std Dev` returns the standard deviation of the values in the combination.
Rollup	drop-down list (defaults to `First`)	Configures the default function to apply when the analytic request needs to rollup records from a single data source into less granular records. If rollup is not enabled in the binding/settings window, the rollup value configured in the Data Definition applies to all chart bindings, reports and tables. `And` returns the logical “and” of Boolean values. `Avg` returns the statistical mean, which is determined by calculating the sum of all values and dividing by the number of values. `Count` returns the total number or quantity of values in a combination. If you request this value on a binding in a PX view, the system counts the number of values based on the properties defined by the data source block and the algorithm’s Property Sheet. `First` returns the first value in the combination. `Last` returns the last value in the combination. `Max` returns the highest value in the combination. `Median` returns the value in the middle of a sorted combination—the number that separates the higher half from the lower half. `Min` returns the lowest value in the combination. `Mode` returns the statistically most frequently occurring number in the combination. `Or` returns the logical “or” of Boolean values. `Range` returns the statistical difference between the largest and smallest values in the combination. `Sum` adds together all values in the combination resulting in a single value. `Std Dev` calculates the standard deviation of the values in the combination. `Load Factor` calculates the average divided by peak (Max) value.
Min Interval	drop-down list (defaults to `None`)	Defines the minimum wait time between processing items in the queue. The default value of zero (0) does not enforce a minimum wait time. Triggered Poller components do not use a `Rate` property. You should use the `Min Interval` property to balance CPU load by slowing down the execution of items in the queue.
Max Interval	drop-down list (defaults to `None`)	Defines the maximum wait time between processing items in the queue. The default value of zero (0) does not enforce a maximum wait time.
Facets	Units, precison, min, max, etc.	Configure how to display historical and calculated values, such as units or precision. A unit is a standard facet that applies to both data input and data output. You use it for viewing a point’s value or algorithm’s result. If a units facet is assigned, it need not match the units facet of a Data Source or Data Definition; however, it must be correct for the raw value being processed and must be convertible to the corresponding unit specified in the Data Definition or Data Source.