Danfoss VLT Decentral Drive FCD 302 Design Manual

Also see for vlt fcd 302: Installation guide Operating guide Operating instructions Programming guide Operating guide

Contents

Danfoss VLT Decentral Drive FCD 302 Design Manual Manual pdf 40 page image

Case 3: Negative to positive reference with dead band, sign determines the direction, -maximum to +maximum+50010 V130BA189.13-10-500-1500-500-101 10VAnalog input 53Low reference 0 RPMHigh reference +500 RPMLow voltage 1 VHigh voltage 10 VExt. source 1range:-50,0% (-500 RPM)+50,0% (+500 RPM)+100,0% (+1000 RPM)Ext. referencerange:-100,0% (-1000 RPM)+500 RPM 10 VExt. referenceabsolute-500 RPM -10 VReferencealgorithmReference+100,0% (+1000 RPM)-100,0% (-1000 RPM)range:Limited to:-100%- +100%(-1000 RPM-+1000 RPM)-200%- +200%(-2000 RPM-+2000 RPM)Reference is scaledaccording to maxreferenceScale toRPM+1000 RPM-1000 RPMrange:Speed setpointMotorcontrol MotorLimits speed to min maxmotor speedMotor PIDRPMDead bandGeneral referenceparameters:Reference range: -Max - +MaxMinimum reference: Not relevantMaximum reference: 1000 RPM (100,0%)General motorparameters:Motor speed direction: Both directionsMotor speed low limit: 0 RPMMotor speed high limit: 1500 RPM-1 V to 1 VRPM-500 RPM -10 VExt. reference+500 RPM 10 Vabsolute+50,0% (+500 RPM)-50,0% (-500 RPM)High reference +500 RPMExt. source 2Low reference -500 RPMAnalog input 54range:High voltage +10 VLow voltage -10 VNo deadbandLimited to:Illustration 2.32 Example 3 - Positive to Negative Reference2.7 Brake FunctionsBrake function is applied for braking the load on themotor shaft, either as dynamic brake or static braking.2.7.1 Mechanical BrakeA mechanical holding brake mounted directly on themotor shaft normally performs static braking. In someapplications (usually synchronous permanent motors), thestatic holding torque holds the motor shaft. The holdingbrake is either controlled by a PLC, directly by a relay, or adigital output from the frequency converter.NOTICEA frequency converter cannot provide Safe Torque Offcontrol of a mechanical brake. A redundancy circuitry forthe brake control must be included in the installation.Product Overview and Functi... VLT® Decentral Drive FCD 30238 Danfoss A/S © 05/2018 All rights reserved. MG04H30222