5.8 L: Protection FunctionsYASKAWA ELECTRIC SIEP C710616 27G YASKAWA AC Drive A1000 Technical Manual 295Parameter Details5 L7-07: Torque Limit Control Method Selection during Accel/DecelSelects the function of torque limit during acceleration and deceleration.Setting 0: Proportional controlThe torque limit function works with P control during accel and decel, and switches to I control at constant speed. Usethis setting when accelerating or decelerating to the desired speed has priority over the torque limit during speed changes.Setting 1: Integral controlThe torque limit function always uses I control. Use this setting when a highly accurate torque limit is required, evenduring speed changes. Using this function may increase the acceleration time, or may prevent the motor speed fromreaching the frequency reference if the torque limit is reached first. L7-16: Torque Limit Process at StartAssigns a time filter to allow the torque limit to build at start.Setting 0: DisabledToque limit is created at start without a delay time. Disable L7-16 to maximize response time when the applicationrequires sudden acceleration or deceleration at start.Setting 1: EnabledA time filter is added to allow the torque limit to build at start. L8: Drive Protection L8-01: Internal Dynamic Braking Resistor Protection Selection (ERF type)This parameter selects the dynamic braking resistor protection when using an optional heatsink mounted braking resistor(ERF type, 3% ED).Note: This parameter is not available in models CIMR-A4A0930 and 4A1200.Setting 0: DisabledDisables braking resistor protection. Use this setting for any dynamic braking option other than the YASKAWA ERFtype resistor.Setting 1: EnabledEnables protection for YASKAWA ERF type resistors. L8-02: Overheat Alarm LevelSets the overheat alarm (oH) detection level.The drive will output an alarm when the heatsink temperature exceeds the alarm level set in parameter L8-02. If thetemperature reaches the overheat fault level, the drive will trigger an oH1 fault and stop operation.When an output terminal is set for the oH pre-alarm (H2- = 20), the switch will close when the heatsink temperaturerises above L8-02.No. Name Setting Range DefaultL7-07 Torque Limit Control Method Selection during Accel/Decel 0 or 1 0No. Name Setting Range DefaultL7-16 Torque Limit Process at Start 0 to 1 1No. Name Setting Range DefaultL8-01 Internal Dynamic Braking Resistor Protection Selection (ERF type) 0 or 1 0No. Name Setting Range DefaultL8-02 Overheat Alarm Level 50 to 150 °C Determined by C6-01 ando2-04
