Danfoss VLT AQUA Drive FC 202 Design Manual

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

Contents

• On each start command (29-11 Derag at Start/Stop)• On each stop command (29-11 Derag at Start/Stop)• On each start/stop command (29-11 Derag atStart/Stop)• On digital input (parameter group 5-1* DigitalInputs)• On drive action with the smart logic controller(13-52 SL Controller Action)• As timed action (parameter group 23-** Time-based Functions)• On high power (parameter group 29-2* DeragPower Tuning)4.2.4 Pre/post LubeCertain motors require lubrication of their mechanical partsbefore and during running to prevent damage/wear. Thisis especially the case when the motor has not beenrunning for extended periods of time. Pre-lube alsosupports applications that may require certain exhaust fansto be running. The Pre-lube feature signals an externaldevice to start performing a specific action for a user-defined period of time beginning at the rising edge of arun command (for example, start request). Furthermore, astart delay (1-71 Start Delay) can be entered such that thepre-lube only occurs while the frequency converter isstopped and the pre-lube completes just before thefrequency converter starts to ramp up. Pre-lube can alsobe configured such that the external device remainssignalled at all times when the frequency converter is in arunning state or such that the signal stays on after themotor has stopped (29-42 Post Lube Time). Applicationexamples include a device to lubricate the mechanicalparts of a motor/pump or some type of exhaust fan unit.An example use case for a lubrication device would be tostart lubrication at the rising edge of a start request. Delaythe start for a period of time and stop lubrication whenthe delay expires and the frequency converter starts.Illustration 4.2 shows a different usage of the feature. Inthis case, the delay expires while the frequency converteris already ramping up. See the related parameters inTable 4.1.130BD765.10N MAXN MIN01100123t1 t3t2TTT1 Speed curve2 Start command (for example, terminal 18)3 Pre lube output signalt1 Start command issued (for example, terminal 18 is setactive). The start delay timer (1-71 Start Delay) and thepre lube timer (29-41 Pre Lube Time).t2 The start delay timer expires. The frequency converterstarts to ramp up.t3 The pre lube timer (29-41 Pre Lube Time) expires.Illustration 4.2 Pre/post Lube Function ExampleParameter andNameDescription Settings Unit29-40 Pre/PostLube FunctionSelect the pre/postlube function. Use1-71 Start Delay toset the delay beforethe motor will startramping.[0]*Disabled[1] Pre lube only[2] Pre & running[3] Pre & running& post-29-41 Pre LubeTimeEnter the duration ofthe signal after thestart signal. Usedonly when [1] Prelube Only is selectedin 29-40 Pre/Post LubeFunction.0-600 (*10) s29-42 Post LubeTimeSelect the duration ofthe signal after themotor has stopped.Used only when [3]Pre & running & postis selected in29-40 Pre/Post LubeFunction.0-600 (*10) sTable 4.1 Pre/Post Lube ParametersApplication Examples Design Guide98 Danfoss A/S © 09/2014 All rights reserved. MG20N60244