Danfoss vlt AQUA Instruction Manual

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

22-41 Minimum Sleep TimeRange: Function:10 s* [0 - 600 s] Set the desired minimum time for staying in sleep mode. This will override any wake-up conditions.22-42 Wake-up Speed [RPM]Range: Function:0 RPM* [par. 4-11 - par. 4-13 RPM] To be used if par. 0-02Motor Speed Unit has been set for RPM (parameter not visible if Hz selected).Only to be used if par.1-00Configuration Mode is set for open-loop and speed reference is appliedby an external controller.Set the reference speed at which sleep mode should be canceled.22-43 Wake-up Speed [Hz]Range: Function:0 Hz* [par. 4-12 - par. 4-14 Hz] To be used if par. 0-02Motor Speed Unit has been set for Hz (parameter not visible if RPM selected).Only to be used if par.1-00Configuration Mode is set for open-loop and speed reference is appliedby an external controller controlling the pressure.Set the reference speed at which sleep mode should be canceled.22-44 Wake-up Ref./FB DifferenceRange: Function:10%* [0-100%] Only to be used if par. 1-00,Configuration Mode, is set for closed-loop and the integrated PI con-troller is used for controlling the pressure.Set the pressure drop allowed as a percentage of the setpoint for the pressure (Pset) before can-celing sleep mode.NOTE!If used in application where the integrated PI controller is set for inverse controlin par. 20-71,PID, Normal/Inverse Control, the value set in par. 22-44 will au-tomatically be added.22-45 Setpoint BoostRange: Function:0 %* [-100 - 100 %] Only to be used if par.1-00Configuration Mode, is set for closed-loop and the integrated PI controlleris used. For example, in systems with constant pressure control, it is advantageous to increase thesystem pressure before the motor is stopped. This will extend the time during which the motor isstopped and help to avoid frequent start/stop.Set the desired over pressure/temperature as a percentage of the setpoint for the pressure (Pset)/temperature before entering sleep mode.If set at 5%, the boost pressure will be Pset*1.05. The negative values can be used, for example,for cooling tower control, where a negative change is needed.22-46 Maximum Boost TimeRange: Function:60 s* [0 - 600 s] Only to be used if par.1-00Configuration Mode is set for closed-loop and the integrated PI controlleris used for controlling the pressure.Set the maximum time for which boost mode will be allowed. If the set time is exceeded, sleepmode will be entered and will not wait for the set boost pressure to be reached.VLT® AQUA DriveInstruction Manual8 How to program the adjustable frequencydriveMG.20.M5.22 - VLT® is a registered Danfoss trademark 8-398