4-2 Function Mode Note 3: Acceleration/deceleration time varies depending on fluctuations in current value, even with the same motor. Note 4: The automatic optimum acceleration/deceleration setting is enabled only during V/f control. When sensorless vector control is selected, the Inverter performs normal operation. Note 5: If the jogging operation is performed when the automatic operation is selected, the Inverter performs automatic acceleration, which is different from normal jogging operation. Note 6: When the applied load is larger than the rating, deceleration time may be prolonged. Note 7: If acceleration and deceleration are frequently repeated, the Inverter may trip. Note 8:
When the internal braking circuit is used, or when the regenerative braking unit is externally installed, the motor cannot stop within the specified deceleration time because of braking resistance. In this case, do not use the automatic optimum acceleration/deceleration function. Note 9: When using a lower rank motor size than specified for the Inverter, enable the overload limit function (b021), and set the overload limit level (b022) to 1.5 times the rated current of the motor. 4 Functions 2-step Acceleration/Deceleration Function •By setting this function, you can change the acceleration/deceleration time during acceleration/ deceleration.
* To switch to the 2nd/3rd control, allocate 08 (SET)/17 (SET3) to the desired multi-function input and then turn it on. 4-37 Parameter No. Function name Data Default setting Unit A092 Acceleration time 2 0.01 to 99.99 100.0 to 999.9 1000. to 3600. 15.0 s A292 *2nd acceleration time 2 s A392 *3rd acceleration time 2 s A093 Deceleration time 2 0.01 to 99.99 100.0 to 999.9 1000. to 3600. 15.0 s A293 *2nd deceleration time 2 s A393 *3rd deceleration time 2 s A094 2-step acceleration/ deceleration selection 00: Switched via multi-function input 09 (2CH) (example 1) 01: Switched by setting (example 2) 02:
Enabled only when switching forward/ reverse (example 3) 00 A294 *2nd 2-step acceleration/ deceleration selection A095 2-step acceleration frequency 0.00 to 99.99 100.0 to 400.0 0.0 Hz A295 *2nd 2-step acceleration frequency A096 2-step deceleration frequency 0.00 to 99.99 100.0 to 400.0 00 Hz A296 *2nd 2-step deceleration frequency Related functions F002, F202, F302, F003, F203, F303, C001 to C008