Selection of operating mode (4-quadrant operation P82x)

P820 / P821 allows you to enable and disable 4-quadrant operation. 4-quadrant operation is possible if you connect a braking resistor to MOVITRAC^® B. P820 / P821 must be set to "off" if there is no braking resistor connected to MOVITRAC^® B, which means regenerative operation is not possible. In this operating mode, the MOVITRAC^® B unit attempts to extend the deceleration ramp. As a result, the generated power is not too great and the DC link voltage remains below the switch-off threshold.