The Variable Speed Pump Control (VSP Control) automatically calculates pump speed over time during an Extended Period Simulation (EPS), in order to maintain user-specified fixed or time-varying (pattern-based) pressure at a junction anywhere in the system or fixed or time-varying (pattern-based) pump discharge flows.


The VSP Control allows you to accurately mimic the actual operational behavior of the pump with variable frequency drive.

Use the Variable Speed Pump Control   toolbar button from the Model Explorer - Attribute Tab Toolbar to access the Variable Speed Pump Control dialog box.

To enter a VSP control for a pump, do the following to bring up the VSP Control dialog box.


Control Type

Control Data

VSP Pump Properties

 Purge - Clear all variable speed pump control data.

 Update - Save the current data or changes, and exit the Variable Speed Pump Control dialog box.

 Cancel - Do not save any changes and exit the Variable Speed Pump Control dialog Box.