4-2 Function Mode Regenerative Braking Function •This function applies to the Inverter models with a built-in regenerative braking circuit (3G3RX-A2220/A4220 or lower models). •With the built-in regenerative braking circuit, this function allows an external braking resistor to consume the motor's regeneration energy as heat. This function is useful for a system in which the motor works as a generator when it is rapidly decelerated. •To use this function, configure the following settings. 4 Functions * The regenerative braking function ON level conforms to the voltage setting for the Inverter's internal converter (DC unit).
Cooling Fan Control •You can set whether to operate the Inverter's cooling fan constantly or only during Inverter operation. Note: If a momentary power interruption occurs or the power is shut off while the cooling fan is in operation, the cooling fan stops temporarily and restarts automatically after power recovery. 4-71 Parameter No. Function name Data Default setting Unit b090 Usage rate of regenerative braking function 0.0: Does not operate. 0.1 to 100.0: A regenerative braking usage rate for 100 seconds can be set, in increments of 0.1%. If the set usage rate is exceeded, a braking resistor overload trip (E06) occurs.
t1 t2 t3 ON ON ON Regenerative braking 100 s function activated (t1 + t2 + t3) Usage rate (%) = × 100 100 s 0.0 % b095 Regenerative braking function operation selection 00: Disabled (This function is not active.) 01: Enabled during operation (This function is active.) Disabled during stop (This function is not active.) 02: Enabled during both operation and stop (This function is active.) 0.0 b096 Regenerative braking function ON level 200-V class: 330 to 380 * 400-V class: 660 to 760 * (Inverter DC voltage) 200-V class: 360 V 400-V class: 720 V V Parameter No. Function name Data Default setting Unit b092 Cooling fan control 00: Always ON 01:
ON during RUN Regardless of the settings, the cooling fan operates for 5 minutes after power-on, and for 5 minutes after the Inverter stops. 01