Machine Protection6- 49Machine ProtectionThis section explains functions for protecting the machine. Limiting Motor Torque (Torque Limit Function)The motor torque limit function is enabled with open-loop vector control.In the open-loop vector control the user-set value is applied to the torque limit by cal-culating internally the torque output by the motor. Enable this function if you do not want a torque above aspecified amount to be applied to the load, or if you do not want a regeneration value above a specifiedamount to occur.Related ConstantsCon-stantNum-berName Description SettingRangeFactorySettingChangeduringOpera-tionControl Methods MEMOBUSRegis-terV/fV/fwithPGOpenLoopVec-torFluxVec-torL7-01Forwarddrive torquelimit Sets the torque limit value as a percent-age of the motor rated torque.Four individual regions can be set.0 to300 200% No No No A A 4A7HL7-02Reversedrive torquelimit0 to300 200% No No No A A 4A8HL7-03Forwardregenera-tive torquelimit0 to300 200% No No No A A 4A9HL7-04Reverseregenera-tive torquelimit0 to300 200% No No No A A 4AAHL7-06Integraltime settingfor torquelimitSet the integral time for the torquelimit. When integral control is set forthe torque limit, reduce this setting toincrease the change in frequency for thetorque limit.5 to10000 200 ms No No No A No 4ACHL7-07Controlmethodselectionfor torquelimit dur-ing acceler-ation anddecelerationSelect the control method for the torquelimit during acceleration and decelera-tion.0: Proportional control (integralcontrol during constant speed)1: Integral controlUsually, this constant does not need tobe set.For applications in which the torquelimit will be reached during accelera-tion and deceleration, torque controlcan be given priority by selecting inte-gral control.When the torque is limited, the acceler-ation and deceleration times mayincrease or the motor speed may notagree with the speed reference value.0 or 1 0 No No No A No 4C9Hflux vector control andand flux vector control,Output torquePositive torqueReverseNegative torqueNo. ofmotorrotationsRegenerativestateRegenerativestateForward
