Danfoss VLT FC 360 Design Manual

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Contents

Danfoss VLT FC 360 Design Manual Manual pdf 64 page image

4.1.1 Encoder ConnectionThe purpose of this guideline is to ease the set-up ofencoder connection to the frequency converter. Beforesetting up the encoder the basic settings for a closed loopspeed control system will be shown.Encoder Connection to the frequency converter130BD366.12+24 V DCABGND12 18 322719 29 33 20Illustration 4.2 24 V or 10-30 V EncoderBABA130BA646.10CWCCWIllustration 4.3 24 V Incremental Encoder. Max. Cable Length 5m.4.1.2 Encoder DirectionThe direction of encoder is determined by which order thepulses are entering the drive.Clockwise direction means channel A is 90 electricaldegrees before channel B.Counter Clockwise direction means channel B is 90electrical degrees before A.The direction determined by looking into the shaft end.4.1.3 Closed Loop Drive SystemA drive system consist usually of more elements such as:• Motor• Add(Gearbox)(Mechanical Brake)• Frequency converter• Encoder as feed-back system• Brake resistor for dynamic braking• Transmission• LoadApplications demanding mechanical brake control willusually need a brake resistor.Motor GearboxLoadTransmissionEncoder Mech. brakeBrake resistor130BA120.10Illustration 4.4 Basic Set-up for Closed Loop Speed ControlApplication Examples VLT® AutomationDrive FC 360 Design Guide62 MG06B202 - VLT® is a registered Danfoss trademark44