12.9 L: Protection Functions702 YASKAWA SIEPC71061753A GA500 Technical Manual■ L7-06: Torque Limit Integral TimeNo.(Hex.) Name Description Default(Range)L7-06(04AC)Torque Limit Integral TimeSets the integral time constant for the torque limit function.200 ms(5 - 10000 ms)Decrease the setting value to increase torque limit responsiveness when you use torque limits and L7-07 = 1[Torque Limit during Accel/Decel = Proportional & Integral control].If there is hunting when torque limits are active, increase the setting value.■ L7-07: Torque Limit during Accel/DecelNo.(Hex.) Name Description Default(Range)L7-07(04C9)Torque Limit during Accel/Decel Sets the torque limit function during acceleration and deceleration.0(0, 1)0 : Proportional onlyThe torque limit function works with proportional control during acceleration and deceleration, and switches tointegral control at constant speed. Use this setting when quickly reaching the target speed is more important thanthe torque limit during speed changes.1 : Proportional & Integral controlThe torque limit function always uses integral control. Use this setting when a very accurate torque limit isnecessary during speed changes, for example in winding machine applications.If you make the torque limit the most important, it can:• Increase the acceleration and deceleration times.• Not let the motor speed reach the frequency reference value during run at constant speed.■ L7-16: Torque Limit Process at StartNo.(Hex.) Name Description Default(Range)L7-16(044D)Torque Limit Process atStart Assigns a time filter to allow the torque limit to build at start.1(0, 1)0 : DisabledThere is torque limit at start without a delay time.Use this setting to maximize the response time when sudden acceleration or deceleration at start is necessary.1 : EnabledThere is a delay time of 64 ms at start to build the torque limit.◆ L8: Drive ProtectionL8 parameters set protective functions that prevent faults such as overheating, phase loss, and ground faults.■ L8-01: 3% ERF DB Resistor ProtectionNo.(Hex.) Name Description Default(Range)L8-01(04AD)3% ERF DB ResistorProtection Sets the function to enable braking resistor protection with a Yaskawa ERF series braking resistor(3% ED) installed on the heatsink.0(0, 1)0 : NoDisables braking resistor protection. Use this setting for dynamic braking options that are not Yaskawa ERF seriesbraking resistors.1 : YesEnables protection for Yaskawa ERF series braking resistors.Note:Set L8-01 = 1 and H2-01 to H2-03 = D [MFDO Function Select = Braking Resistor Fault]. Use a sequence to turn OFF power withMFDO.V/f OLV OLV/PMOLV/PM AOLV/PM EZOLVV/f OLV OLV/PMOLV/PM AOLV/PM EZOLVV/f OLV OLV/PMOLV/PM AOLV/PM EZOLVV/f OLV OLV/PMOLV/PM AOLV/PM EZOLV
