Hitachi P1 - Dynamic Braking

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DYNAMIC BRAKING
The dynamic braking is used to electronically brake the motor during deceleration
resistor or a regenerative converter. The parameters below only apply when using a resistor.
Load-Brake – The internal load-
detect when the load-
result in the resistor becoming hot and damaging the VFD.
Non-Load-Brake –The dynamic braking usage ratio should be set to 
Dynamic braking mode – By default this is set to 2:enabed all the time. This helps suppress the DC BUS voltage from causing an E07
fault during idle if power spikes occur randomly. If the power becomes high for a long period of time this will cause an E06 fault to
occur.
Dynamic braking voltage activation level – This is the DC BUS voltage level in which the braking chopper circuit will activate. In some
cases with high input power, you may need to adjust the level or an E06 will occur.
Function
Parameter
Values
Factory Default
Dynamic braking allowable usage
ratio
bA-60
Load- 
Non-Load- 
Dynamic braking Mode
bA-61
0 = disabled
1 = enabled during RUN 1 = enabled during RUN
2 = enabled all the time
Dynamic braking DC BUS voltage
activation level
bA-62
200V Class – (330 – 400V) 380V
400V Class (660 – 800V) 780V