6 Utility Functions (Fn)6-226.13 Vibration Detection Level Initialization (Fn01B)This function detects vibration when servomotor is connected to a machine in operation and automaticallyadjusts the vibration detection level (Pn312) to output more exactly the vibration alarm (A.520) and the vibra-tion warning (A.911).The vibration detection function detects vibration elements according to the motor speed.If the vibration exceeds the detection level calculated by the following formula, the alarm or warning will beoutput according to the setting of vibration detection switch (Pn310).• Use this function if the vibration alarm (A.520) or the vibration warning (A.911) is not output correctlywhen a vibration at the factory setting of the vibration detection level (Pn312) is detected. In other cases, itis not necessary to use this function.• The vibration alarm or warning detection sensibility differs depending on the machine conditions. In thiscase, fine-tune the setting of the vibration detection sensitivity (Pn311) using the above detection level for-mula as a guide.(1) PreparationThe following conditions must be met to initialize the vibration detection level.• The write prohibited setting parameter (Fn010) must be set to Write permitted (P.0000).• The test without a motor function must be disabled (Pn00C.0 = 0).Parameter Meaning When Enabled ClassificationPn310n.0[Factory setting] Does not detect vibration.Immediately Setupn.1 Outputs the warning (A.911) when vibration isdetected.n.2 Outputs the alarm (A.520) when vibration is detected.Pn311Vibration Detection Sensitivity ClassificationSetting Range Setting Unit Factory Setting When Enabled50 to 500 1% 100 Immediately Tuning• The vibration may not be detected because of improper servo gains. Also, not allkinds of vibrations can be detected. Use the detection result as a guideline.• Set a proper moment of inertia ratio (Pn103). Improper setting may result in the vibra-tion alarm, warning misdetection, or non-detection.• The references that are used to operate your system must be input to execute thisfunction.• Execute this function under the operating condition for which the vibration detectionlevel should be set.• Execute this function while the motor speed reaches at least 10% of its maximum.Detection level =ޓVibration detection level (Pn312 [min -1 ])× Vibration detection sensitivity (Pn311 [%])100RotationSpeed Position Torque
