E6582175E-2155.9 Auto-restart (Restart of coasting motor)f301 : Auto-restart control selectionCautionMandatoryaction Stand clear of motors and mechanical equipmentIf the motor stops due to a momentary power failure, the equipment will start suddenly when power isrestored.This could result in unexpected injury. Attach caution label about sudden restart after a momentary power failure on inverters, motors andequipment for prevention of accidents in advance. FunctionThe f301 parameter detects the rotating speed and rotational direction of the motor during coasting atthe event of momentary power failure, and then after power has been restored, restarts the motorsmoothly (motor speed search function). This parameter also allows switching from commercial poweroperation to inverter operation without stopping the motor.During operation, "rtry" is displayed.[Parameter setting]Title Function Adjustment range Default settingf301 Auto-restart controlselection0: Disabled1: At auto-restart after momentary stop2: At ST terminal off and on3: 1 24: At start-up0* If the motor is restarted in retry mode, this function will operate, regardless of the setting of this parameter.1) Auto-restart after momentary power failure (Auto-restart function)Input voltageMotor speedForward / reverseONOFFSetting f301 to 1 or 3: This function operates after power has been restored following detection of anundervoltage by the main circuits and control power.