6 -52 Preventing Motor Stalling During OperationStall prevention during operation prevents the motor from stalling by automatically lowering the Inverter'soutput frequency when a transient overload occurs while the motor is operating at a constant speed.Stall prevention during operation is enabled only during V/f control. If the Inverter output current continues toexceed the setting in constant L3-06 for 100 ms or longer, the motor speed is reduced. Set whether to enable ordisable deceleration time using constant L3-05. Set the deceleration time using C1-02 (Acceleration time 1) orC1-04 (Acceleration Time 2).If the Inverter output current reaches the set value in L3-06 - 2% (Inverter Rated Output Current), the motorwill accelerate again at the frequency set or the acceleration time set.Related Constants* C6-01= 1: 120 %, C6-01= 0: 150 %Con-stantNumberName Description SettingRangeFactorySettingChangeduringOpera-tionControl Methods MEMOBUSRegis-terV/fV/fwithPGOpenLoopVec-torFluxVec-torL3-05Stall preven-tion selectionduring run-ning0: Disabled (Runs as set. Witha heavy load, the motor maystall.)1: Deceleration time 1 (thedeceleration time for the stallprevention function is C1-02.)2: Deceleration time 2 (thedeceleration time for the stallprevention function is C1-04.)0 to 2 1 No A A No No 493HL3-06Stall preven-tion level dur-ing runningEffective when L3-05 is 1 or 2.Set as a percentage of theInverter rated output current.Usually setting is not necessary.The factory setting reduces theset values when the motor stalls.30 to200120%*No A A No No 494H150%*
