gefran TPD32-EV-500 series - Figure 6.14.6.1: Overload Control (Overload Mode = Curr Limited)

—————— TPD32-EV ——————
250
Motor ovrld preal. Thissignalcanbesetonadigitaloutput(code65).Itgoestothehighlevel(1)when
Motor I2t accum=90%.Itgoestolowlevel(0)when Motor I2t accum=0.
Drive I2t accum Itgivesapercentagedenitionoftheintegrationofthermscurrent.100%=triplevel
driveI2t.Drive I2t accumisequalto100%if[(150%DeratedDriveCurrent
(*)
)
2
x60
sec]isreached.
Drive ovrld preal. Thissignalcanbesetonadigitaloutput(code66).Itgoestothehighlevel(1)when
Drive I2t accum=90%.Itgoestolowlevel(0)when Drive I2t accum=0.
Overld available Indicateswhetheranoverloadispossiblethisveryinstantorwhetherthisisnotyetthe
case,duetothesetcycle(Pause timenotyetexpired).
 High Overloadpossible
 Low Overloadcurrentlynotpossible
Overload state IftheOverload modeparameterisdenedsothatthecurrentisnotlimitedbythe
Overloadcontrol,theOverload statecanbeusedtodeterminewhetherthecurrentis
withinthesetlimitsornot.
High Currentexceedsthesetlimits
 Low Currentdoesnotexceedthesetlimits.
note! Overloadstateisnotalatchedoutput.ForI2t,itiscanbeconsideredasaoneshot.
TheOverloadcontrolisenabledwiththeEnable overloadparameter.Itcanbeusedtoprotectthedriveormotor
fromthermaloverloadswithcyclicalloads.
Themax.possiblevalues(asfortheconverter)areobtainablethroughthefollowingcurves.Theoperatingpoint
mustalwaysbebelowthecorrespondingcurve.Atthevericationitistostate,thatthetorqueandthecurrent
areproportional.
TheOverld availableparameterallowstounderstandifthedriveisreadytosupplyanoverloadcurrent.Ifthe
currentexceedsthevaluedenedbytheBase currentparameter,thetimesetbytheOverload time parameter
startstorun.Oncethistimehasexpired,thecurrentislimitedagaintotheBasecurrent.Thistakesplaceirrespec-
tiveofhowhightheoverloadwasandhowlongitlasted.Asubsequentoverloadispermissableimmediately
afterthetimesetbythe Pause timeparameter.If Overload modeissetto“Currnotlimited”,Thecurrentisnot
limitedbuttheOverload stateparameterindicateswhetheritisoutofthedenedrange.
Caution!  Awronginputofthevaluesmaycausethedestructionofthedevice!
Time
Overload
current [312]
Base
current [313]
Overload
time [310]
Overload
time [310]
Overload
time [310]
Pause
time [311]
Pause
time [311]
Waiting
time
Overld
available
[406]
Overload
state [407]
T current
Limits
Figure 6.14.6.1: Overload control (Overload mode = curr limited)