4-2 Function Mode Automatic Energy-saving Operation Function •This function automatically minimizes the Inverter output power during constant speed operation, and is suitable for load with reduced torque characteristics (e.g. fan, pump). •To operate with this function, set RUN mode selection A085 to "01". You can adjust the response and accuracy with energy-saving response/accuracy adjustment A086. •Controls the output power at a comparatively slow rate. Should rapid load fluctuation like impact load occur, the motor may stall, resulting in an overcurrent trip.
4 Functions Automatic Optimum Acceleration/Deceleration •The automatic acceleration/deceleration function eliminates the need for acceleration/deceleration settings during Inverter operation. •Conventionally, the user had to set an Inverter acceleration/deceleration time depending on the actual load conditions. However, this function can automatically set an acceleration/deceleration time, making full use of the Inverter's capacity. The acceleration time is a time during which acceleration is performed within a current value set in the overload limit parameter (when the overload limit function is enabled), or within approx.
150% of the rated current (when the overload limit function is disabled). The deceleration time is a time during which deceleration is performed within approx. 150% of the rated current value, or within a DC voltage in the Inverter circuit of approx. 370 V (200V-class) or approx. 740 V (400 V-class). Thus, the Inverter enables real-time response to a change in applied load and inertia, and sets acceleration/deceleration time automatically. • Note the following before use: Note 1: This function is not suitable for a machine that needs a fixed acceleration/deceleration time. Acceleration/deceleration time varies depending on applied load and inertia. Note 2:
If the machine inertia exceeds approx. 20 times that of the motor shaft, the Inverter may trip. In this case, reduce the carrier frequency. 4-36 Parameter No. Function name Data Default setting Unit A085 RUN mode selection 00: Normal operation 01: Energy-saving operation 02: Automatic operation 00 A086 Energy-saving response/ accuracy adjustment 0% to 100% 50 % Parameter No. Function name Data Response Accuracy A086 Energy-saving response/ accuracy adjustment 0 100 Slow Fast High Low Parameter No. Function name Data Default setting Unit A085 RUN mode selection 00: Normal operation 01: Energy-saving operation 02:
Automatic operation 00 Related functions A044, A244, A344, b021, b024, b022, b025