7. Description of Parameters MD500 User Manual
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Function Code Parameter Name Setting Range Default
) Power dip ride-through
function selection
0: Disabled
1: Bus voltage constant control
2: Decelerate to stop
0
) Voltage level of power dip ride-
through function disabled
85% to 120% 85%
) Judging time of bus voltage
recovering from power dip
0.1s to 10.0s 0.5s
) Voltage level of power dip ride-
through function enabled
60% to 85% (standard bus voltage) 80.0%
) Power dip ride-through gain Kp 0 to 100 30
) Power dip ride-through
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0 to 100 40
) Power dip ride-through gain Kp 0.0s to 300.0s 20.0s
Note
ƕ In the bus voltage constant control mode, when the line voltage recovers,
the AC drive accelerates to the target frequency.
ƕ In the deceleration to stop mode, when the line voltage recovers, the AC drive continues to decelerates
to 0 Hz and stops. The AC drive will not be started until it receives the RUN command again.
7.6.7 Load Lost Protection
Function Code Parameter Name Setting Range Default
) Selection of load lost protection 0: Disabled
1: Enabled
0
) Load lost detection level 0.0% to 100.0% (rated motor current) 10.0%
) Load lost detection time 0.0s to 60.0s 1.0s
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automatically declines the output frequency to 7% of the rated frequency. Once the load recovers during protection, the AC drive
accelerates to the frequency reference.
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