u L3: Stall PreventionNo.(Addr.Hex) Name LCD Display Description Values PageL3-01(48F)Stall PreventionSelection duringAccelerationStallP Accel Sel0: Disabled1: General purpose2: Intelligent0: Disabled.1: General purpose. Acceleration is paused as long as thecurrent is above the L3-02 setting.2: Intelligent. Accelerate in the shortest possible time withoutexceeding the L3-02 level.Note: Setting 2 is not available when using OLV/PM.Default: 1Range: 0 to 2 –L3-02(490) Stall Prevention Levelduring Acceleration StallP Accel LvlUsed when L3-01 = 1 or 2. 100% is equal to the drive ratedcurrent. Default: <1>Min.: 0%Max.: 150% <1>–L3-03(491) Stall Prevention Limitduring Acceleration StallPAcc LowLim Sets Stall Prevention lower limit during acceleration whenoperating in the constant power range. Set as a percentage ofdrive rated current.Default: 50%Min.: 0Max.: 100 –L3-04(492)Stall PreventionSelection duringDecelerationStallP Decel Sel0: Disabled1: General purpose2: Intelligent4: High Flux Brake5: High Flux Brake20: Disabled. Deceleration at the active deceleration rate. An ovfault may occur.1: General purpose. Deceleration is paused when the DC busvoltage exceeds the Stall Prevention level.2: Intelligent. Decelerate as fast as possible while avoiding ovfaults.4: Overexcitation Deceleration. Decelerates while increasingthe motor flux5: Overexcitation Deceleration 2. Adjust the deceleration rateaccording to the DC bus voltage.Default: 1Range: 0 to 2; 4,5 <2> –L3-05(493) Stall PreventionSelection during RunStallP Run Sel0: Disabled1: Decel time2: Decel time 20: Disabled. Drive runs at a set frequency. A heavy load maycause speed loss.1: Decel time 1. Uses the deceleration time set to C1-02 whileStall Prevention is performed.2: Decel time 2. Uses the deceleration time set to C1-04 whileStall Prevention is performed.Default: 1Range: 0 to 2 –L3-06(494) Stall Prevention Levelduring Run StallP Run LevelEnabled when L3-05 is set to 1 or 2. 100% is equal to the driverated current. Default: <1>Min.: 30%Max.: 150% <1>–L3-11(4C7)OvervoltageSuppression FunctionSelectionOV Inhibit Sel0: Disabled1: EnabledEnables or disables the ov suppression function, which allowsthe drive to change the output frequency as the load changes toprevent an ov fault.0: Disabled1: EnabledDefault: 0Range: 0, 1 –L3-17(462)Target DC Bus Voltagefor OvervoltageSuppression and StallPreventionDC Bus Reg LevelSets the desired value for the DC bus voltage during overvoltagesuppression and Stall Prevention during deceleration. Default: 370 Vdc<3> <4>Min.: 150Max.: 400 <4>–L3-20(465) DC Bus VoltageAdjustment Gain DC Bus P GainDetermines the proportional gain used by overvoltagesuppression (L3-11 = 1), Single drive KEB 2 (L2-29 = 1), KEBRide-Thru 2 (H1-oo = 7A or 7B), and Intelligent StallPrevention during Deceleration (L3-04 = 2) to control the DCbus voltage in OLV/PM.Default: <5>Min.: 0.00Max.: 5.00–L3-21(466) Accel/Decel RateCalculation Gain Acc/Dec P GainSets the proportional gain used to calculate the deceleration rateduring KEB Ride-Thru, ov suppression function, and StallPrevention during deceleration (L3-04 = 2).Default: <5>Min.: 0.00Max.: 200.00–L3-22(4F9)Deceleration Time atStall Prevention duringAcceleration PM Acc Stall P T Sets the deceleration time used for Stall Prevention duringacceleration in OLV/PM. Default: 0.0 sMin.: 0.0Max.: 6000 –L3-23(4FD)Automatic ReductionSelection for StallPrevention during RunCHP Stall P Sel0: Lv1 set in L3-061: Autom. Reduction0: Sets the Stall Prevention level set in L3-04 that is usedthroughout the entire frequency range.1: Automatic Stall Prevention level reduction in the constantoutput range. The lower limit value is 40% of L3-06.Default: 0Range: 0, 1 –L3-24(46E)Motor AccelerationTime for InertiaCalculations Mtr Accel TimeOLV/PMOLV/PMSets the time needed to accelerate the uncoupled motor at ratedtorque from stop to the maximum frequency.Default: <6> <7>Min: 0.001 sMax: 10.000 s–L3-25(46F) Load Inertia Ratio Load Inertia Rat OLV/PMOLV/PMSets the ratio between the motor and machine inertia.Default: 1.0Min.: 1.0Max.: 1000.0 –B.8 L: Protection Function314 YASKAWA ELECTRIC TOEP C710616 45F YASKAWA AC Drive – Z1000 User Manual
