Specify how to write results

In the Collectives and Servers pane, select the server or collective.

In the System Management Tools pane, select Points > Totalizers.

Select the Results tab.

Select one of the following options in the Write final results section:

• After a time period elapses: Specify the start time and the duration of the time period. You can also specify whether or not you want the PI Totalizer to honor Daylight Saving Time (DST), that is, produce n + 1 hour totals at the spring time change and n - 1 hour totals at the autumn time change.

• Based on a trigger event: Enter an expression in PI Performance Equation syntax and the PI Totalizer evaluates the expression each time any of the PI tags in the expression update. You can choose to have the PI Totalizer write results whenever the result of the expression changes, or whenever the expression evaluates to zero.

• After a number of source events: Results are written when a specified number of SourceTag events occur. In this case, no interim results are written and only the final result is recorded.

• Continue forever [interim results ONLY]: If you are building or editing a time-weighted moving total, maximum, or minimum summary calculation, you can choose to have the PI Totalizer continue forever. This behavior is like that of an integrator; you see interim results ramp up. If you choose the Setable option on the options tab you can write a new value to the PI Totalizer and force final results to be written. The PI Totalizer will start again using the newly entered value as its base.

Enter the appropriate values in the Details section.

Select an option in the Write interim results section.

The options are enabled or disabled depending on other configuration choices:

• Stamped one second after start

• At source time [ramp]

• Projection based on source value — A new result is sent to the PI Snapshot as each SourceTag event is processed. The value is an estimate of the result if the rate point were to hold steady at its current value.

• Projection based on average — A new result is sent to the PI Snapshot as each SourceTag event is processed. The value is an estimate of the result if the rate point were to hold steady at the average observed so far in this accumulation interval.

• Do not write interim results