Danfoss VLT AQUA Drive FC 202 Programming Manual

Also see for VLT AQUA Drive FC 202: Service guide Installation guide Installation guide Operating guide Installation guide

Contents

3.19 Parameters 22-** Application Functions3.19.1 22-0* MiscellaneousThis group contains parameters used for monitoring water/wastewater applications.22-00 External Interlock DelayRange: Function:0 s* [0 - 600s]Only relevant if 1 of the digital inputs inparameter group 5-1* Digital Inputs has beenprogrammed for [7] External Interlock. The22-00 External Interlock DelayRange: Function:external interlock timer introduces a delay afterthe signal has been removed from the digitalinput programmed for external interlock, beforereaction takes place.22-01 Power Filter TimeRange: Function:0.50 s* [0.02 - 10 s]3.19.2 22-2* No-Flow DetectionIllustration 3.63 Signal Flow ChartThe VLT® AQUA Drive FC 202 includes functions thatdetect if the load conditions in the system allow the motorto be stopped:• Low-power detection.• Low-speed detection.1 of these 2 signals must be active for a set time(parameter 22-24 No-Flow Delay) before selected actiontakes place. Possible actions to select (parameter 22-23 No-Flow Function) are:• No action.• Warning.• Alarm.• Sleep mode.No-flow detectionThis function is used to detect a no-flow situation in pumpsystems where all valves can be closed. It can be usedboth when controlled by the integrated PI controller in thefrequency converter or an external PI controller. Programthe actual configuration in parameter 1-00 ConfigurationMode.Configuration mode for:• Integrated PI controller: Closed loop.• External PI controller: Open loop.Parameter Description Programming GuideMG20OB02 Danfoss A/S © 05/2018 All rights reserved. 1773 3