mitsubishi A700 inverter revers rotation after dc injection brake reales

[Mr7 0]

dears i have a problem on mitsubishi A700 intervert i am using dc injection brake for inverter brake.the dc injection brake working properly but when the brake realse motor move littel bit reverse.how can i control this revers movment.and one thing i am using run stop from pu.other thing there is no machnical load on motor

[the5150 0]

Mr7, are you using a PLC or other external device to release the brake? .....or have you assigned the "relay output 1" (alarm output) --parameter 190 to RUN terminal function and letting the VFD control the brake function? Too, look at parameters 10, 11, 12 (DC injection brake) and parameter 13 (Starting frequency). I have modified these parameters, especially 13 (from the default of .5 Hz to 3 Hz or greater) to control bounce in VFD controlled conveyor elevator/drop lifter. Let me know your results.