4-2 Function Mode •The set time here indicates the acceleration/deceleration time from 0 Hz to the maximum frequency. Output frequency Maximum frequency A004/A204 4 Even if a short acceleration/deceleration time is set, the actual time cannot be shorter than the min- imum acceleration/deceleration time that is determined by the mechanical inertia moment and the motor torque. If you set a time shorter than the minimum time, an overcurrent/overvoltage trip may occur.
Functions Acceleration Time T S N J J T 9.55 J L J M N M T S T B T L M M L S T T = ( + )Ч Ч( ) – :Inertia moment of the load converted to the motor shaft [kg·m 2 ] L S :Inertia moment of the motor [kg·m 2 ] :Motor rotation speed [r/min] :Maximum acceleration torque with the Inverter driving [N·m] :Maximum deceleration torque with the Inverter driving [N·m] :Required driving torque [N·m] N J J T 9.55 = ( + )Ч Ч( ) + Deceleration Time T B M M L B T T L B For short-time deceleration, use the regenerative braking unit (optional). Digital Operator Rotation Direction Selection Select the direction of motor rotation applied to the RUN command via the Digital Operator. This is disabled at terminals.
4-6 Actual acceleration time Actual deceleration time F003/F203 Actual deceleration time Parameter No. Function name Data Default setting Unit F004 Operator rotation direction selection 00: Forward 01: Reverse 00