Danfoss VLT AQUA Programming Manual

Also see for vlt aqua: Instructions Design guide Instruction manual Operating instructions Design guide

Contents

23-84 Cost SavingsRange: Function:0.00* [0 - 0] This parameter allows a readout of the calculation based on theabove equation (in local currency).2.21. Main Menu - Cascade Controller - Group 252.21.1. 25-** Cascade ControllerParameters for configuring the Basic Cascade Controller for sequence control of multiple pumps.For a more application oriented description and wiring examples, see sectionApplication Exam-ples, Basic Cascade Controller.To configure the Cascade Controller to the actual system and the desired control strategy, it isrecommended to follow the below sequence, starting withSystem Settings, par. 25-0*, and nextAlternation Settings, par. 25-5*. These parameter can normally be set in advance.Parameters inBandwidth Settings, 25-2*, andStaging settings, 25-4*, will often be dependenton the dynamic of the system and final adjustment to be done at the commissioning of the plant.NB!The Cascade Controller is supposed to operate in closed loop controlled by the built-in PI controller (Closed Loop selected inConfiguration Mode, par.1-00). IfOpenLoop is selected inClosed Loop, par.1-00, all fixed speed pumps will be destaged,but the variable speed pump will still be controlled by the frequency converter, nowas an open loop configuration:VLT ® AQUA Drive Programming Guide 2. Parameter DescriptionMG.20.O2.02 - VLT ® is a registered Danfoss trademark 2272