Danfoss VLT Series Programming Manual

Also see for VLT series: Service manual Installation guide Operating instructions Operating instructions Service manual

Contents

Danfoss VLT Series Programming Manual Manual pdf 59 page image

3.6 Main Menu - Limits/Warnings - Group 43.6.1 4-1* Motor LimitsDefine torque, current and speed limits for the motor, andthe reaction of the frequency converter when the limits areexceeded.A limit may generate a message on the display. A warningwill always generate a message on the display or on thefieldbus. A monitoring function may initiate a warning or atrip, upon which the frequency converter will stop andgenerate an alarm message.4-10 Motor Speed DirectionOption: Function:Selects the motor speed direction required.Use this parameter to prevent unwantedreversing.[0] Clockwise Only operation in clockwise direction willbe allowed.[2] * Both directions Operation in both clockwise and anti-clockwise direction will be allowed.NOTEThe setting in 4-10 Motor Speed Direction has impact onthe Flying Start in 1-73 Flying Start.4-11 Motor Speed Low Limit [RPM]Range: Function:Sizerelated*[ 0 - par.4-13 RPM]Enter the minimum limit for motorspeed. The Motor Speed Low Limit canbe set to correspond to themanufacturer’s recommendedminimum motor speed. The MotorSpeed Low Limit must not exceed thesetting in 4-13 Motor Speed High Limit[RPM].4-12 Motor Speed Low Limit [Hz]Range: Function:Size related* [ 0 - par.4-14 Hz]Enter the minimum limit for motorspeed. The Motor Speed Low Limitcan be set to correspond to theminimum output frequency of themotor shaft. The Speed Low Limitmust not exceed the setting in4-14 Motor Speed High Limit [Hz].4-13 Motor Speed High Limit [RPM]Range: Function:Sizerelated*[ par.4-11 -60000.RPM]Enter the maximum limit for motorspeed. The Motor Speed High Limit canbe set to correspond to themanufacturer’s maximum rated motor.The Motor Speed High Limit must4-13 Motor Speed High Limit [RPM]Range: Function:exceed the setting in 4-11 Motor SpeedLow Limit [RPM]. Only 4-11 Motor SpeedLow Limit [RPM] or 4-12 Motor Speed LowLimit [Hz] will be displayed depending onother parameters in the Main Menu anddepending on default settingsdependant on global location.NOTEMax. output frequency cannot exceed 10% of the inverterswitching frequency (14-01 Switching Frequency).NOTEAny changes in 4-13 Motor Speed High Limit [RPM] will resetthe value in 4-53 Warning Speed High to the same value asset in 4-13 Motor Speed High Limit [RPM].4-14 Motor Speed High Limit [Hz]Range: Function:Sizerelated*[ par.4-12 -par. 4-19Hz]Enter the maximum limit for motor speed.The Motor Speed High Limit can be set tocorrespond to the manufacturer’srecommended maximum of the motorshaft. The Motor Speed High Limit mustexceed the in 4-12 Motor Speed Low Limit[Hz]. Only 4-13 Motor Speed High Limit[RPM] or 4-14 Motor Speed High Limit [Hz]will be displayed depending on otherparameters in the Main Menu anddepending on default settings dependanton global location.NOTEMax. output frequency cannot exceed 10% of the inverterswitching frequency (14-01 Switching Frequency).4-16 Torque Limit Motor ModeRange: Function:Sizerelated*[ 0.0 -1000.0 %]Enter the maximum torque limit for motoroperation. The torque limit is active in thespeed range up to and including the ratedmotor speed set in 1-25 Motor NominalSpeed. To protect the motor from reachingthe stalling torque, the default setting is1.1 x the rated motor torque (calculatedvalue). See also 14-25 Trip Delay at TorqueLimit for further details.If a setting in 1-00 Configuration Mode to1-28 Motor Rotation Check is changed,4-16 Torque Limit Motor Mode is notautomatically reset to the default setting.Parameter Description VLT® HVAC Drive Programming Guide58 MG.11.CC.02 - VLT® is a registered Danfoss trademark33