Danfoss VLT HVAC Drive FC 102 Design Manual

Also see for VLT HVAC Drive FC 102: Operating instructions Service guide Programming guide Installation guide Installation guide

Contents

InitialisingIf initialising is carried out (14-22 Operation Mode), theprogrammable parameters of the frequency converterreturn to their default settings.Intermittent Duty CycleAn intermittent duty rating refers to a sequence of dutycycles. Each cycle consists of an on-load and an off-loadperiod. The operation can be either periodic duty or none-periodic duty.LCPThe local control panel (LCP) makes up a completeinterface for control and programming of the frequencyconverter. The LCP is detachable and can be installed upto 3 metres from the frequency converter, in a front panelwith the installation kit option.The LCPl is available in two versions:• Numerical LCP101 (NLCP)• Graphical LCP102 (GLCP)lsbLeast significant bit.MCMShort for mille circular mil, an American measuring unit forcable cross-section. 1 MCM ≡ 0.5067 mm2.msbMost significant bit.NLCPNumerical local control panel LCP101.On-line/Off-line parametersChanges to on-line parameters are activated immediatelyafter the data value is changed. Changes to off-lineparameters are not activated until [OK] is entered on theLCP.PID controllerThe PID controller maintains the desired speed, pressureand temperature by adjusting the output frequency tomatch the varying load.PCDProcess Data.Pulse input/incremental encoderAn external digital sensor used for feedback information ofmotor speed and direction. Encoders are used for high-speed accuracy feedback and in high dynamic applications.The encoder connection is either via terminal 32 orencoder option. MCB 102RCDResidual Current Device. A device that disconnects a circuitin case of an imbalance between an energised conductorand ground. Also known as a ground fault circuitinterrupter (GFCI).Set-upParameter settings can be saved in 4 set-ups. Changebetween the 4 parameter set-ups and edit 1 set-up, whileanother set-up is active.SFAVMSwitching pattern called Stator Flux oriented AsynchronousVector Modulation (14-00 Switching Pattern).Slip CompensationThe frequency converter compensates for the motor slipby giving the frequency a supplement that follows themeasured motor load, keeping the motor speed almostconstant.Smart Logic Control (SLC)The SLC is a sequence of user-defined actions executedwhen the associated user-defined events are evaluated astrue by the SLC.STWStatus word.ThermistorA temperature-dependent resistor placed where thetemperature is monitored (frequency converter or motor).THDTotal Harmonic Distortion. A state of full harmonicdistortion.TripA state entered in fault situations. For example, if thefrequency converter is subject to an overtemperature orwhen it is protecting the motor, process, or mechanism.Restart is prevented until the cause of the fault hasdisappeared and the trip state is cancelled by activatingReset or, in some cases, by being programmed to resetautomatically. Do not use trip for personal safety.Trip LockedA state entered in fault situations when the frequencyconverter is protecting itself and requires physicalintervention. For example, if the frequency converter issubject to a short circuit on the output, it will enter triplock. A locked trip can only be cancelled by cutting offmains, removing the cause of the fault, and reconnectingthe frequency converter.VT CharacteristicsVariable torque characteristics used for pumps and fans.VVC+If compared with standard voltage/frequency ratio control,Voltage Vector Control (VVCplus) improves the dynamicsand the stability, both when the speed reference ischanged and in relation to the load torque.60° AVMSwitching pattern called 60°Asynchronous VectorModulation (See 14-00 Switching Pattern).The power factor is the relation between I1 and IRMS.Power factor = 3 ×U ×I1 ×COSϕ3 ×U ×IRMSHow to Read this Design Gui... Design GuideMG16C202 Danfoss A/S © Rev. 05/2014 All rights reserved. 111 1