6 -32 Preventing Overvoltage During Deceleration (Stall Prevention DuringDeceleration Function)The Stall Prevention During Deceleration function makes the rate of deceleration more gentle to suppressincreases in DC bus voltage when the DC bus voltage exceeds the set value during motor deceleration.This function automatically lengthens the deceleration time with respect to the bus voltage, even if the decel-eration time has been set to a considerably small value.If L3-04 is set to 1 or 2, when the main circuit DC voltage approaches the stall prevention level during decel-eration, deceleration stops, and when deceleration falls below the level, is restarted. Using this operation,deceleration time is automatically lengthened. If L3-04 is set to 1, deceleration time returns to the set value,and if L3-04 is set to 2, deceleration is automatically adjusted to a faster deceleration time within the range ofthe stall prevention level during deceleration.Related Constants* When using flux vector control, 0 to 2.Con-stantNumberName Description SettingRangeFactorySettingChangeduringOpera-tionControl Methods MEMOBUSRegis-terV/fV/fwithPGOpenLoopVec-torFluxVec-torL3-04Stall preven-tion selectionduring decel0: Disabled (Deceleration asset. If deceleration time istoo short, a main circuitovervoltage may result.)1: Enabled (Deceleration isstopped when the maincircuit voltage exceeds theovervoltage level.Deceleration restarts whenvoltage is returned.)2: Intelligent decelerationmode (Deceleration rate isautomatically adjusted sothat in Inverter candecelerate in the shortestpossible time. Setdeceleration time isdisregarded.)3: Enabled (with BrakingResistor Unit)When a braking option (BrakingResistor, Braking Resistor Unit,Braking Unit) is used, alwaysset to 0 or 3.0 to 3 * 1 No Q Q Q Q 492H
