Danfoss VLT 6002-6011 Installation, Operation And Maintenance Manual

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Danfoss VLT 6002-6011 Installation, Operation And Maintenance Manual Manual pdf 59 page image

59Application FunctionsParameters 400 through 427Special functions of the drive are set up in this parameter group. Thisincludes the proportional, integral,derivitative controller (PID) andsetting the sleep mode function.Additionally, this parameter group includes:- Reset function- Flying start- Interference reduction- Loss of load- Carrier frequency- Selection of process units400 Reset Function (RESET FUNCTION)Value:Manual reset (MANUAL RESET) [0]Automatic reset x 1 (AUTOMATIC X 1) [1]Automatic reset x 2 (AUTOMATIC X 2) [2]Automatic reset x 3 (AUTOMATIC X 3) [3]Automatic reset x 4 (AUTOMATIC X 4) [4]Automatic reset x 5 (AUTOMATIC X 5) [5]Automatic reset x 10 (AUTOMATIC X 10) [6]Automatic reset x 15 (AUTOMATIC X 15) [7]Automatic reset x 20 (AUTOMATIC X 20) [8] Infinite automatic reset (INFINITE AUTOMATIC) [9]Function:This parameter allows a choice of manual or automatic reset after a faulttrip. There is also a choice of the number of times the unit will attempt torestart. The time between each attempt is set in parameter 401,Automatic Restart Time.Description of choice:If Manual Reset is selected, the Reset key must be pressed or a digitalinput given to reset the drive.If auto reset after a fault trip is desired, select one of the Automatic resetchoices.DANGER!If any automatic reset choices are selected,motor can start without warning.401 Automatic Restart Time(AUTORESTART TIME)Value:0 to 600 seconds 10 sec.Function:This parameter sets the automatic reset time delay until each reset isattempted. One of the automatic resets must be selected in parameter400, Reset Function.Description of choice:Set the desired time before each restart attempt.CAUTION!When parameter 402,Flying Start, is enabled,motor may turn forward and reverse a fewrevolutions even with motor stopped. In highlydynamic pumping processes, it is recommendedto disableFlying Start function.402 Flying Start (FLYING START)Value: Disable (DISABLE) [0]Enable (ENABLE) [1]DC brake and start (DC BRAKE AND START) [3]Function:This function makes it possible for the drive to ‘catch’ a rotating motorwhen the drive is started. The drive will sense the speed of rotation anddirection of rotation of the motor and synchronize with it.This function is active whenever a start command is present.For the drive to catch the spinning motor, the motor speed must belower than the maximum frequency set in parameter 202.Description of choice:Select Disable if this function is not required.Select Enable if the drive is to ‘catch’ and control a rotating motor.Select DC brake and start if the drive is to brake the motor by means ofthe DC brake first, and then start. Ensure that parameters 114 through116, DC Braking, are set appropriately. Select DC brake and start if themotor may be externally driven at a significant speed in the reversedirection.NOTEFor fan applications, factory setting forFlyingStart is Enable. For pump applications, factorysetting forFlying Start is Disable.Sleep ModeSleep mode makes it possible to stop the drive when the systemdemand drops below a preset level. When the demand increases to ahigher preset level, the drive will restart. A significant amount of energycan be saved using sleep mode. Unlike a set-back time clock, the driveis always available to run when the demand reaches the preset “wakeup” level. Sleep mode is not active if Local Reference is selected inparameter 203, Reference Handling, or if the Jog function activates viadigital inputs. Sleep mode operates in both Open Loop and ClosedLoop.✭ Indicates default parameter. Depending upon the application, the drive may be delivered with other parameters selected.