4-124
minimum output frequency.
. In response to the DC braking time 07-08 in stopping, set the DC braking action time
when the motor is stopped. If 07-08 is set to 0 (DC Injection Braking Time at Stop),
when the output frequency is less than the DC braking start frequency 07-06, the
inverter output will be closed and the DC braking will be enabled. If the set DC
braking start frequency 07-06 is less than the minimum output frequency 01-08,
when the output frequency is less than the minimum output frequency 01-08, the
DC braking will be enabled.
. DC braking current level for either start or stop will be set by parameter 07-07. Set
the DC braking current (07-07) as a part of the output current proportion that the
inverter can withstand (the output current that the inverter can withstand is set to
100%). The DC braking current parameter (07-07) can not be used together with
sensor vector control (SV), and can not be set.
. Increasing the DC braking time (07-08,07-16), or increasing the DC braking current
(07-07) can reduce the stop time.
. For DC braking operation, please refer to Figure 4.3.57.
Figure 4.3.57 DC brake operation
. By setting any one of terminals (03-00 to 07) to 33, it is possible to control the DC
braking operation by multifunction digital input. As to the DC braking time figure,
please refer to Figure 4.3.57.
. If 04-05 (function option of multi-function analog input AI2) are set to 5 (DC braking
current), the analog input can be used to adjust the DC braking current. For DC
braking current adjustment, please refer to Figure 4.3.44.
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